Trane Stealth Helical Rotary Rtae Installation And Maintenance Manual SVX001B EN (10/2014)

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Installation, Operation,
and Maintenance

Stealth™ Air-Cooled Chiller
Model RTAE
150 to 300 Nominal Tons

SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and airconditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment 
by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and
on the tags, stickers, and labels that are attached to the equipment.

October 2014

RTAE-SVX001B-EN

Warnings, Cautions and Notices
Warnings, Cautions and Notices. Note that warnings,
cautions and notices appear at appropriate intervals
throughout this manual. Warnings are provided to alert
installing contractors to potential hazards that could result
in death or personal injury. Cautions are designed to alert
personnel to hazardous situations that could result in
personal injury, while notices indicate a situation that
could result in equipment or property-damage-only
accidents.
Your personal safety and the proper operation of this
machine depend upon the strict observance of these
precautions.
Read this manual thoroughly before operating or servicing
this unit.

must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.

WARNING
Refrigerant under High Pressure!
System contains oil and refrigerant under high
pressure. Recover refrigerant to relieve pressure before
opening the system. See unit nameplate for refrigerant
type. Do not use non-approved refrigerants, refrigerant
substitutes, or refrigerant additives. Failure to recover
refrigerant to relieve pressure or the use of nonapproved refrigerants, refrigerant substitutes, or
refrigerant additives could result in an explosion which
could result in death or serious injury or equipment
damage.

ATTENTION: Warnings, Cautions and Notices appear at

appropriate sections throughout this literature. Read
these carefully:
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
Indicates a potentially hazardous
CAUTIONs situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
a situation that could result in
NOTICE: Indicates
equipment or property-damage only

WARNING

Important
Environmental Concerns!
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the
environment.Trane advocates the responsible handling of
all refrigerants-including industry replacements for CFCs
such as HCFCs and HFCs.

Responsible Refrigerant Practices!
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified.The Federal Clean Air Act
(Section 608) sets forth the requirements for handling,
reclaiming, recovering and recycling of certain
refrigerants and the equipment that is used in these
service procedures. In addition, some states or
municipalities may have additional requirements that
© 2014Trane All rights reserved

WARNING
Personal Protective Equipment (PPE)
Required!
Installing/servicing this unit could result in exposure to
electrical, mechanical and chemical hazards.
•

Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Material Safety Data
Sheets (MSDS)/Safety Data Sheets (SDS) and OSHA
guidelines for proper PPE.

•

When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS/SDS and
OSHA/GHS (Global Harmonized System of
Classification and Labelling of Chemicals) guidelines
for information on allowable personal exposure
levels, proper respiratory protection and handling
instructions.

•

If there is a risk of energized electrical contact, arc, or
flash, technicians MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING WITHOUT PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.

Failure to follow instructions could result in death or
serious injury.

RTAE-SVX001B-EN

Warnings, Cautions and Notices

WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.

Factory Warranty Information
Compliance with the following is required to preserve the
factory warranty:

All Unit Installations
Startup MUST be performed byTrane, or an authorized
agent ofTrane, to VALIDATE this WARRANTY. Contractor
must provide a two-week startup notification toTrane (or
an agent ofTrane specifically authorized to perform
startup).

Copyright
This document and the information in it are the property of
Trane, and may not be used or reproduced in whole or in
part without written permission.Trane reserves the right
to revise this publication at any time, and to make changes
to its content without obligation to notify any person of
such revision or change.

Trademarks
All trademarks referenced in this document are the
trademarks of their respective owners.

Revision History
RTAE-SVX001B-EN (29 Oct 2014)
•

Added transformer option.

•

Added harmonic filter option.

•

Added 150T and 165T single circuit units.

•

Added extreme low ambient option.

•

Added seismic isolation option.

•

Added CE/PED option.

•

Updated unit weights and isolator information.

•

Updated drive cooling fluid volumes.

•

Modified oil sump check procedure.

RTAE-SVX001A-EN (24 Sep 2013)
New release.

RTAE-SVX001B-EN

3

Table of Contents
Warnings, Cautions and Notices . . . . . . . . . .
Factory Warranty Information . . . . . . . . . . .
Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History . . . . . . . . . . . . . . . . . . . . . . .

2

Pressure Relief Valves . . . . . . . . . . . . . . . . . .26

3
3

Evaporator Waterside Pressure Drop
Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

3

Freeze Protection . . . . . . . . . . . . . . . . . . . . . .29

3

Low Evaporator Refrigerant Cutout,

Model Number Description . . . . . . . . . . . . . . . 6
Outdoor Unit Nameplate . . . . . . . . . . . . . . . 6
Compressor Nameplate . . . . . . . . . . . . . . . . 6

Model Number Descriptions . . . . . . . . . . . . . . 7
Unit Model Number . . . . . . . . . . . . . . . . . . . . 7
Compressor Model Number . . . . . . . . . . . . 8
Compressor Serial Number . . . . . . . . . . . . . 8

Glycol Requirements . . . . . . . . . . . . . . . . . . .30

Installation Electrical . . . . . . . . . . . . . . . . . . . . .31
General Recommendations . . . . . . . . . . . . .31
Adaptive Frequency™ Drive (AFD3)
Capacitor Discharge . . . . . . . . . . . . . . . . . .32
Units with Nitrogen Charge Option . . . . .32

Installer-Supplied Components . . . . . . . . . .32
Power Supply Wiring . . . . . . . . . . . . . . . . .33

General Information . . . . . . . . . . . . . . . . . . . . . 9
Unit Description . . . . . . . . . . . . . . . . . . . . . . . 9
Accessory/Option Information . . . . . . . . . . . 9

Control Power Supply . . . . . . . . . . . . . . . .34

General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Drive Cooling System . . . . . . . . . . . . . . . . . 11

Interconnecting Wiring . . . . . . . . . . . . . . . . .35

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . 12

Programmable Relays . . . . . . . . . . . . . . . . . .35

Unit Inspection . . . . . . . . . . . . . . . . . . . . . 12

Relay Assignments Using Tracer™ TU . . .36

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 12

Low Voltage Wiring . . . . . . . . . . . . . . . . . . . .36

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Emergency Stop . . . . . . . . . . . . . . . . . . . . .36

Installation Requirements . . . . . . . . . . . . . . 13

External Auto/Stop . . . . . . . . . . . . . . . . . . .36

Dimensions and Weights . . . . . . . . . . . . . . . .
Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . .
Service Clearances . . . . . . . . . . . . . . . . . . . .

14

Service Power Connection . . . . . . . . . . . .34
Heater Power Supply . . . . . . . . . . . . . . . . .34
Chilled Water Pump Control . . . . . . . . . . .35

14

External Circuit Lockout –
Circuit #1 and #2 . . . . . . . . . . . . . . . . . . . . .36

14

Ice Building Option . . . . . . . . . . . . . . . . . .37

14

External Chilled Water Setpoint (ECWS)
Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Installation Mechanical . . . . . . . . . . . . . . . . . . 15
Location Requirements . . . . . . . . . . . . . . . . 15

External Demand Limit Setpoint (EDLS)
Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Sound Considerations . . . . . . . . . . . . . . . 15

Chilled Water Reset (CWR) . . . . . . . . . . . .38

Foundation . . . . . . . . . . . . . . . . . . . . . . . . 15

Transformer Power Rating . . . . . . . . . . . . . .39

Clearances . . . . . . . . . . . . . . . . . . . . . . . . . 15

Communications Interface . . . . . . . . . . . . . .39

Center of Gravity . . . . . . . . . . . . . . . . . . . . . 20

LonTalk Interface (LCI-C) . . . . . . . . . . . . . .39

Isolation and Sound Emission . . . . . . . . . . 20

BACnet Interface (BCI-C) . . . . . . . . . . . . . .39

Unit Isolation and Leveling . . . . . . . . . . . 20

Modbus Remote Terminal Unit Interface .39

Compressor Shipping Bolt Removal . . . . 23

Operating Principals . . . . . . . . . . . . . . . . . . . . .40
Refrigeration Circuits . . . . . . . . . . . . . . . . . .40
Refrigeration Cycle . . . . . . . . . . . . . . . . . . . .40
Refrigerant R-134a . . . . . . . . . . . . . . . . . . . . .40

Units with InvisiSound™ Ultimate Option
(Model Number Digit 12 = 3) . . . . . . . . . . 23

Drainage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Evaporator Piping Components . . . . . . . 25
4

RTAE-SVX001B-EN

Compressor and Lube Oil System . . . . . . 40
Condenser and Fans . . . . . . . . . . . . . . . . . . 40

Running (Lag Compressor/Circuit
Start and Run) . . . . . . . . . . . . . . . . . . . . . .63

Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Satisfied Setpoint . . . . . . . . . . . . . . . . . . . .64

Drive Cooling System . . . . . . . . . . . . . . . . . 41

Normal Shutdown to Stopped or
Run Inhibit . . . . . . . . . . . . . . . . . . . . . . . . .65

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
UC800 Specifications . . . . . . . . . . . . . . . . . . 42

Immediate Shutdown to Stopped or
Run Inhibit . . . . . . . . . . . . . . . . . . . . . . . . .65

Wiring and Port Descriptions . . . . . . . . . 42
Communication Interfaces . . . . . . . . . . . . 43
Rotary Switches . . . . . . . . . . . . . . . . . . . . 43
LED Description and Operation . . . . . . . . 43

Tracer AdaptiView TD7 Display . . . . . . . . . 43
Operator Interface . . . . . . . . . . . . . . . . . . 43
Main Display Area/Home Screen . . . . . . 44
Viewing Chiller Operating Modes . . . . . 44
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Equipment Settings . . . . . . . . . . . . . . . . . 49
Display Settings . . . . . . . . . . . . . . . . . . . . 51
Viewing the Settings Screen

. . . . . . . . . 51

Cleaning the Display . . . . . . . . . . . . . . . . 52
Security Settings . . . . . . . . . . . . . . . . . . . 52
Disabling/Enabling Security . . . . . . . . . . 52
InvisiSound Ultimate - Noise Reduction
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Tracer™ TU . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Start-Up and Shutdown . . . . . . . . . . . . . . . . .
Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . .
Temporary Shutdown And Restart . . . . . .
Extended Shutdown Procedure . . . . . . . . .
Seasonal Unit Start-Up Procedure . . . . . .
System Restart After Extended Shutdown
Sequence of Operation . . . . . . . . . . . . . . . .

57
57
57
57
58
58
59

Software Operation Overview . . . . . . . . . 59
Timelines . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Power Up Diagram . . . . . . . . . . . . . . . . . . 60
Power Up to Starting . . . . . . . . . . . . . . . . 61
Stopped to Starting . . . . . . . . . . . . . . . . . 62
Running (Lead Compressor/Circuit Start
and Run) . . . . . . . . . . . . . . . . . . . . . . . . . . 63
RTAE-SVX001B-EN

Ice Making (Running to Ice Making to
Running) . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Ice Making (Auto to Ice Making to Ice
Making Complete) . . . . . . . . . . . . . . . . . . .67

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Recommended Maintenance . . . . . . . . . . . .69
Weekly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Monthly . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Annual . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Refrigerant and Oil Charge Management .69
Lubrication System . . . . . . . . . . . . . . . . . . . .69
Oil Sump Level Check . . . . . . . . . . . . . . . .69

Drive Cooling System . . . . . . . . . . . . . . . . . .71
Service Intervals . . . . . . . . . . . . . . . . . . . . .71
Unit Diagnostics . . . . . . . . . . . . . . . . . . . . .71
pH Test . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Pressure Relief Cap . . . . . . . . . . . . . . . . . .71
Drive Cooling Expansion Tank . . . . . . . . .71

Condenser Coils — Cleaning and
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Coil Cleaning and Inspection Interval . . . .72
Cleaning Air Side of RTAE Coils . . . . . . . .72
Cleaning Coated Coils . . . . . . . . . . . . . . . .72
Coil Corrosion Protection Inspection . . . .72

Reinstallation of Compressor Shipping
Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Servicing Chiller Roof . . . . . . . . . . . . . . . .72

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
AFD Diagnostics . . . . . . . . . . . . . . . . . . . . . . .73
Main Processor Diagnostics . . . . . . . . . . . . .76
Communication Diagnostics . . . . . . . . . . . .85
Operator Display Diagnostics and
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Unit Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Log and Check Sheet . . . . . . . . . . . . . . . . . . . .90
5

Model Number Description
Nameplates

of typical unit model number and the coding system for
each.

The Stealth™ outdoor unit nameplates are applied to the
exterior of the Control Panel. A compressor nameplate is
located on each compressor. When the unit arrives,
compare all nameplate data with ordering, submittal, and
shipping information.

Each position, or group of positions, in the model number
is used to represent a feature. For example, in the first
table, position 08 of the unit model number, Unit Voltage,
contains the number “4”.A 4 in this position means that the
unit voltage is 460/60/3.

Outdoor Unit Nameplate

Unit Model Number. An example of a typical unit
model number (M/N) is:

See Figure 1 for a typical unit nameplate.The outdoor unit
nameplate provides the following information:

RTAE 200F UA01 AA1F N1X1 A1A0 0CB0 X02X AA03 000
Model number digits are selected and assigned in
accordance with the definitions as listed in “Unit Model
Number,” p. 7.

•

Unit model and size description.

•

Unit serial number.

•

Identifies unit electrical requirements.

•

Lists correct operating charges of R-134a and
refrigerant oil (Trane OIL00311).

•

Lists unit test pressures.

•

Identifies installation, operation and maintenance and
service data literature.

•

Compressor model number. See “Compressor Model
Number,” p. 8.

•

Lists drawing numbers for unit wiring diagrams.

•

Compressor serial number. See “Compressor Serial
Number,” p. 8.

•

Compressor electrical characteristics.

•

Utilization range.

•

Recommended refrigerant.

Model Number Coding System
The model numbers for the unit and the compressor are
composed of numbers and letters that represent features
of the equipment. Shown in the following table is a sample
Figure 1.

6

Compressor Nameplate
The compressor nameplate provides the following
information:

Typical unit nameplate

RTAE-SVX001B-EN

Model Number Descriptions
Unit Model Number
Digits 1,2 — Unit Model

Digit 16 — Evaporator
Application

Digit 26 — Power Line
Connection Type

Digits 3— Unit Type

F

=

A

G

=

A
C
D

C

=

RT =
=

Rotary Chiller
Air-cooled

Digits 4 — Development
Sequence
E

=

Development Sequence

Digits 5-7 — Nominal Capacity
149 =
164 =
150 =
165 =
180 =
200 =
225 =
250 =
275 =
300 =

150 NominalTons Single Circuit
165 NominalTons Single Circuit
150 NominalTons
165 NominalTons
180 NominalTons
200 NominalTons
225 NominalTons
250 NominalTons
275 NominalTons
300 NominalTons

Digit 8— Unit Voltage
A
B
C
D
E
F
G
H

=
=
=
=
=
=
=
=

200/60/3
230/60/3
380/50/3
380/60/3
400/50/3
460/60/3
575/60/3
400/60/3

Standard Cooling
(40 to 68°F/5.5 to 20°C)
LowTemp Process
(<40°F LeavingTemp)
Ice-making (20 to 68°F/-7 to 20°C)
w/ Hardwired Interface

N
P

Digit 28 — Transformer

=
=

2 Pass Evaporator
3 Pass Evaporator

Digit 18 — Evaporator Fluid
Type
1
2
3
4
5

=
=
=
=
=

Water
Calcium Chloride
Ethylene Glycol
Propylene Glycol
Methanol

Digit 19 — Water Connection
X
F

=
=

Grooved Pipe
Grooved Pipe + Flange

Digit 20 — Flow Switch
2

=

Digit 9 — Manufacturing
Location

3

=

U

Digit 21 — Insulation

Digits 10, 11— Design Sequence
** =

Factory assigned

A

=

B

=

Digit 12 — Unit Sound Package
1
2

=
=

InvisiSound™ Standard Unit
InvisiSound Superior
(Line Wraps, Reduced Fan
Speed)
InvisiSound Ultimate
(Compressor Sound Attenuation,
Line Wraps, Reduced Fan Speed)

=

2

=

3

=

Digit 13 — Agency Listing

4

=

0
A
C

5

=

=

=
=
=

No Agency Listing
UL/CUL Listing
CE European Safety Standard

Digit 14 — Pressure Vessel Code
A
D
C

=
=
=

L
P

=
=

ASME Pressure Vessel Code
Australia Pressure Vessel Code
CRN or Canada Equivalent
Pressure Vessel Code
Chinese Pressure Vessel Code
PED European Pressure Vessel
Code

Factory Installed - Other Fluid
(15 cm/s)
Factory Installed - Water 2
(35 cm/s)
Factory Installed - Water 3
(45 cm/s)
Factory Insulation - All Cold Parts
0.75”
Evaporator-Only Insulation High Humidity/Low EvapTemp
1.25”

Digit 22 — Unit Application
1

3

Digit 27 — Short Circuit Current
Rating
A
B

=

Trane Commercial Systems,
Pueblo, CO USA

Terminal Block
Circuit Breaker
Circuit Breaker w/ High Fault
Rated Control Panel

Digit 17 — Evaporator
Configuration

1

=

=
=
=

Standard Ambient
(32 to 105°F/0 to 40.6°C)
Low Ambient
(0 to 105°F/-17.7 to 40.6°C)
Extreme Low Ambient
(-20 to 105°F/-28.9 to 40.6°C)
High Ambient
(32 to 125°F/0 to 52°C)
Wide Ambient
(0 to 125°F/-17.7 to 52°C)

Digit 23 — Condenser Fin
Options
A
D

=
=

Aluminum Fins with Slits
CompleteCoat™ Epoxy Coated
Fins

0
1

=
=
=
=

Default A Short Circuit Rating
High A Short Circuit Rating
NoTransformer
Factory InstalledTransformer

Digit 29 — Line Voltage
Harmonic Mitigation
X
1

=
=

Line Reactors (~30%TDD)
Filter circuit (IEEE519 Compliant)

Digit 30 — Electrical
Accessories
0
C

=
=

No Convenience Outlet
15A 115V convenience Outlet
(Type B)

Digit 31 — Remote
Communication Options
0

=

1

=

2

=

3

=

No Remote Digital
Communication
LonTalk® Interface LCI-C
(Tracer™ Compatible)
BACnet® MS/TP Interface
(Tracer compatible)
ModBus™ Interface

Digit 32 — Hard Wire
Communication
X
A
B

=
=
=

C

=

D
E

=
=

None
Hard Wired Bundle - All
Remote Leaving WaterTemp
Setpoint
Remote Leaving temp and
Demand Limit Setpoints
Programmable Relay
Programmable Relay and
Leaving Water and Demand

Limit
Setpoint
Percent Capacity
Percent Capacity and Leaving
Water and Demand Limit
Setpoint
H = Percent Capacity and
Programmable Relay
F
G

=
=

Digit 33 — Not Used

Digits 24, 25 — Not Used

Digit 15 — Factory Charge
1
2

=
=

Refrigerant Charge HFC-134a
Nitrogen Charge

RTAE-SVX001B-EN

7

Model Number Descriptions
Digit 34 — Structural Options
A
B

=
=

C

=

D
E
F

=
=
=

Standard Unit Structure
Seismic to International Building
Code (IBC)
California Office of Statewide
Health Planning and
Development (OSHPD)
Certification
Wind Load for Florida Hurricane
175 MPH
Seismic (IBC) and Wind Load
OSHPD and Wind Load

Digit 35 — Appearance Options
0
A

=
=

No Appearance Options
Architectural Louvered Panels

Digit 36 — Unit Isolation
0
1
3

=
=
=

No Isolation
Elastomeric Isolators
Seismic Rated Isopads

Digit 37 — Not Used
0

=

Not Used

Digit 38 — Not Used
0

=

Not Used

Digit 39 — Special
0
S

=
=

None
Special

Compressor Model
Number
Digits 1-4 — Compressor Type

Digits 1-2 — Year

CHHS= Positive displacement, helical
rotary (twin screw) hermetic
compressor

YY =

Digit 5 — Frame Size

WW =

R
S

Digit 5 — Day

=
=

R Frame: 70 - 100 tons
S Frame: 112 - 165 tons

Digit 6— Motor Length
B
C
E
F

=
=
=
=

145 mm
170 mm
165 mm
190 mm

Digit 7 — Motor Winding
Characteristics
*

=

Factory assigned

Last two digits of year of
manufacture

Digit 3— Week

1
2
3
4
5
6
7

=
=
=
=
=
=
=

Week of build, from 00 to 52
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
sunday

Digits 6-8 — Coded Time Stamp
TTT = Used to ensure uniqueness of
serial number

Digit 8 — Volume Ratio

Digit 9 — Assembly Line

B

Assembly line compressor was built on.
Varies with facility

=

High Volume Ratio

Digit 9 — Refrigerant
1

=

R-134a

Digits 10-11— Design Sequence
** =

8

Compressor Serial
Number

Digit 10— Build Location
A

=

Monterrey

Factory assigned

RTAE-SVX001B-EN

General Information
Unit Description
The 150-300 ton Stealth™ units are helical-rotary type, aircooled liquid chillers designed for installation outdoors.
The compressor circuits are completely assembled,
hermetic packages that are factory-piped, wired, leaktested, dehydrated, and tested for proper control
operation before shipment.
Chilled water inlet and outlet openings are covered for
shipment.The Stealth featuresTrane’s exclusive Adaptive
Control ™ logic, which monitors the control variables that
govern the operation of the chiller unit. Adaptive Control
logic can adjust capacity variables to avoid chiller
shutdown when necessary, and keep producing chilled
water. All unit sizes are available with two independent
refrigerant circuits. A single refrigeration circuit option is
available for 150 and 165T units. Each compressor is
controlled by a variable speed Adaptive Frequency™
Drive Generation 3 (AFD3). Each refrigerant circuit is
provided with filter, sight glass, electronic expansion
valve, and charging valves.The shell-and-tube type
evaporator is manufactured in accordance with ASME
standards or other international codes. Each evaporator is
fully insulated and is equipped with water drain and vent
connection. As an option, a convenience outlet can be
supplied.

Accessory/Option Information
Check all the accessories and loose parts which are
shipped with the unit against the shipping list. Included in
these items will be water vessel drain plugs, electrical
diagrams, and service literature, which are placed inside
the control panel for shipment.
If optional elastomeric isolators are ordered with unit
(model number digit 36 = 1), they are shipped mounted on
diagonal supports on the end of the unit opposite control
panel. See Figure 3 and Figure 4.
If optional seismic isopads are selected (model number
digit 36= 2), they will be shipped inside the unit control
panel.
Figure 3.

Elastomeric isolator shipping location

Units are shipped with full oil charge and can be ordered
with either a factory refrigerant charge, or optional
nitrogen charge.
Figure 2.

Typical Stealth RTAE

Elastomeric Isolator
Shipping Locations
(not all isolators shown quantity varies with unit configuration)

Figure 4.

RTAE-SVX001B-EN

Elastomeric isolators attached for shipping

9

General Data

General Data
Table 1.

General data table

Unit Size (tons)
Compressor Model
Quantity

#

150

165

180

200

225

250

275

300

150SC

165SC

CHHSR

CHHSR

CHHSR

CHHSR

CHHSS

CHHSS

CHHSS

CHHSS

CHHSS

CHHSS

2

2

2

2

2

2

2

2

1

1

Evaporator
Water Storage

(gal)

17.5

18.7

21.9

23.9

26.6

28.7

33.0

36.0

17.3

17.3

(L)

66.1

70.9

82.8

90.5

100.6

108.8

125.0

136.1

65.6

65.6

(gpm)

171

187

202

228

261

288

318

354

169

169

(l/s)

10.8

11.8

12.7

14.4

16.5

18.2

20.1

22.3

10.7

10.7

2 Pass arrangement
Minimum Flow
Maximum Flow

(gpm)

626

684

742

835

957

1055

1165

1299

620

620

(l/s)

39.5

43.1

46.8

52.7

60.4

66.5

73.5

81.9

39.1

39.1

(gpm)

114

124

135

152

174

192

212

236

113

113

(l/s)

7.2

7.8

8.5

9.6

11.0

12.1

13.4

14.9

7.1

7.1

(gpm)

417

456

495

557

638

703

777

866

414

414

(l/s)

26.3

28.8

31.2

35.1

40.2

44.3

49.0

54.6

26.1

26.1

8

10

10

12

12

12

14

16

8

10

(in)

78.74

78.74

78.74

78.74

78.74

78.74

78.74

78.74

78.74

78.74

(mm)

2000

2000

2000

2000

2000

2000

2000

2000

2000

2000

(in)

50

50

50

50

50

50

50

50

50

50

(mm)

1270

1270

1270

1270

1270

1270

1270

1270

1270

1270

192

192

192

192

192

192

192

192

192

192

3

3

3

3

3

3

3

3

3

3

3 Pass arrangement
Minimum Flow
Maximum Flow
Condenser
Qty of Coils
Coil Length
Coil Height
Fins/Ft
Rows
Condenser Fans
Quantity

#

8

10

10

12

12

12

14

16

8

10

Diameter

(in)

37.5

37.5

37.5

37.5

37.5

37.5

37.5

37.5

37.5

37.5

Total Airflow

(mm)

953

953

953

953

953

953

953

953

953

953

(cfm)

107,392

134,240

134,240

161,088

161,088

161,088

187,936

214,784

107,392

132,240

(m3/hr)

182,460

228,075

228,075

273,690

273,690

273,690

319,305

364,920

182,460

228,075

8700

8700

8700

8700

8700

8700

8700

8700

8700

8700

44.2

44.2

44.2

44.2

44.2

44.2

44.2

44.2

44.2

44.2

Tip Speed (ft/min)
(M/S)
Ambient Temperature Range
Standard Ambient °F (°C)

32 to 105 (0 to 40.6)

Low Ambient °F (°C)

0 to 105 (-17.7 to 40.6)

Extreme Low Ambient °F (°C)

-20 to 105 (-28.9 to 40.6)

High Ambient °F (°C)

32 to 125 (0 to 52)

Wide Ambient °F (°C)

0 to 125 (-17.7 to 52)

General Unit
Refrigerant

HFC-134a
#

Minimum Load

%

20

18

17

15

20

18

16

15

30

27

(lbs)

172

181

210

218

265

261

318

325

322

346

(kg)

78

82

95

99

120

118

144

148

146

157

Refrigerant Charge/ckt

2

Oil
Oil Charge/ckt

10

HFC-134a

Refrigerant Ckts

1

Trane OIL00311 (bulk)/OIL00315 (1 gal)/OIL00317 (5 gal)
(gal)

3.0

3.0

3.0

3.0

4.0

4.0

4.0

4.0

4.0

4.0

(L)

11.4

11.4

11.4

11.4

15.1

15.1

15.1

15.1

15.1

15.1

RTAE-SVX001B-EN

General Data

Drive Cooling System
Drive cooling fluid volumes are dependent on unit
configuration.
•
•

•

Use Table 2 for units that meet the following criteria:

Use Table 2 for units that meet the following criteria:

• Model number digits 10, 11 = AC

• Model number digits 10, 11 = AA

• AND Digits 3-7 = 225, 250, 275 or 300

Use Table 2 for units that meet the following criteria:

• AND Digit 22 = 1 or 2

• Model number digits 10, 11 = AB

• AND Digits 28, 29 = 0X

• AND Digits 28, 29 = 0X
Table 2.

•

Use Table 3 for all other unit configurations.

Drive cooling with load inductor
Unit Size (tons)
Standard Length Unit
150

165-200

gal

l

gal

Fluid Type

225-250
l

gal

275-300
l

gal

l

Trane Heat Transfer Fluid CHM01023

Fluid Volume

Table 3.

Ckt 1

1.74

6.58

1.83

6.92

2.00

7.58

2.09

7.92

Ckt2

1.93

7.30

2.27

8.59

2.44

9.24

2.58

9.78

Total

3.67

13.88

4.10

15.51

4.44

16.82

4.67

17.69

Drive cooling without load inductor
Unit Size (tons)
Extended Length Units(a)

Standard Length Unit
150S - 165S
gal

l

150
gal

165-250
l

gal

Fluid Type

l

275-300
gal

l

150S - 165S
gal

l

150

165-250

275-300

gal

l

gal

l

gal

l

5.20

1.30

4.93

1.32

4.98

1.41

5.33

Trane Heat Transfer Fluid CHM01023

Fluid Volume
Ckt 1

1.28

4.86

1.14

4.30

1.23

4.64

1.32

4.98

1.37

Ckt2

n/a

n/a

1.32

5.01

1.67

6.31

1.81

6.84

n/a

n/a

1.67

6.31

1.81

6.84

1.95

7.38

Total

1.28

4.86

2.46

9.31

2.89

10.95

3.12

11.83

1.37

5.20

2.97

11.23

3.12

11.83

3.36

12.71

(a) Units are extended length if either of the following are selected:
Transformer (model number digit 28 = 1)
Harmonic Filtration Option (model number digit 29 = 1)
Units without Harmonic Filtration Option or Transformer (digits 28, 29 = 0X) are standard length.

NOTICE:
Equipment Damage!
Use only Trane Heat Transfer Fluid P/N CHM01023. This
fluid is a direct use concentration and is not to be
diluted. Do not top off with water or any other fluid.
Use of unapproved fluids, or dilution of approved fluid
could result in catastrophic equipment damage.
Non-Trane approved chemicals could react with system
components and result in failure. Contact a qualified
service technician and your localTrane Parts Center.

Note: The use of incorrect compounds in the drive
cooling system may result in scaling, erosion,
corrosion or freezing.TheTrane Company
warranty specifically excludes liability for
corrosion, erosion, freezing or deterioration of
Trane equipment.
Proper fluid level is important to the operation of the unit.
See “Drive Cooling ExpansionTank,” p. 71 for fluid level
check instructions.The circuit capacities are shown in
tables above.
If the level is below the recommended minimum levels,
contact your localTrane office.
Note: Drive cooling fluid service life is 5 years. See “Drive
Cooling System,” p. 71.

RTAE-SVX001B-EN

11

Pre-Installation
Unit Inspection

Storage

When unit is delivered, verify it is the correct unit and is
properly equipped. Compare information on the unit
nameplate with ordering and submittal information.
Inspect all exterior components for visible damage. Report
any apparent damage or material shortage to carrier and
make a “unit damage” notation on carrier’s delivery
receipt. Specify extent and type of damage found and
notifyTrane Sales Office. Do not proceed with installation
of a damaged unit without sales office approval.

Extended storage of outdoor unit prior to installation
requires these precautionary measures:
• Store the outdoor unit in a secure area.
•

• Suction service valve (butterfly valve)
• Liquid line angle valve or EXV (EXV is driven closed
whenever circuit is powered)

Inspection
To protect against loss due to damage in transit, complete
the following steps upon receipt of unit.
• Inspect the individual pieces of the shipment before
accepting the unit. Check for obvious damage to the
unit or packing material.
• Inspect the unit for concealed damage as soon as
possible after delivery and before it is stored.
Concealed damage must be reported within 15 days.
• If concealed damage is discovered, stop unpacking the
shipment. Do not remove damaged material from the
receiving location.Take photos of the damage, if
possible.The owner must provide reasonable
evidence that the damage did not occur after delivery.
• Notify the carrier’s terminal of the damage
immediately, by phone and by mail. Request an
immediate, joint inspection of the damage with the
carrier and the consignee.
NotifyTrane sales representative and arrange for repair.
Do not repair unit until damage is inspected by the carrier’s
representative.

12

For units that have been charged with refrigerant,
verify the following valves are closed on each circuit:

• Oil line shutoff valves to brazed plate heat
exchangers
Note: Units with factory refrigerant charge (model
number digit 15 = 1) are shipped with suction,
liquid and oil line shutoff valves closed, isolating
most of refrigerant charge in the evaporator. If unit
goes directly into long term storage, it is
recommended that these valve positions be
confirmed.
•

For units with nitrogen charge option (model number
digit 15 = 2), units are shipped with valves open. If unit
goes directly into storage prior to refrigerant charge,
confirm all service valves are open.

N2
•

At least every three months (quarterly), check the
pressure in the refrigerant circuits to verify that the
refrigerant charge is intact. If it is not, contact a
qualified service organization and the appropriate
Trane sales office.

RTAE-SVX001B-EN

Pre-Installation

Installation Requirements
A list of the contractor responsibilities typically associated
with the unit installation process is provided in Table 4.
Table 4.

Installation requirements

Type

Trane Supplied
Trane Installed

Trane Supplied
Field Installed

Field Supplied
Field Installed

Foundation

• Meet foundation requirements

Rigging

•
•
•
•

Disassembly/Reassembly
(as required)(a)

Safety chains
Clevis connectors
Lifting beam
Spreader bar

• Trane, or an agent
of Trane specifically
authorized to perform
start-up of Trane®
products (contact
your local Trane
office for pricing)
• Elastomeric isolators
(optional)

Isolation

• Elastomeric isolators (optional)

• Circuit breakers
(optional)
• Unit mounted starter

•
•
•
•
•
•
•
•
•

Circuit breakers (optional)
Electrical connections to unit mounted starter
Wiring sizes per submittal and NEC
Terminal lugs
Ground connection(s)
BAS wiring (optional)
Control voltage wiring
Chilled water pump contactor and wiring
Option relays and wiring

Water piping

• Flow switch

•
•
•
•
•
•
•

Taps for thermometers and gauges
Thermometers
Water flow pressure gauges
Isolation and balancing valves in water piping
Vents and drain
Waterside pressure relief valves
Water strainer

Insulation

• Insulation

Water Piping Connection Components

• Grooved pipe

Other Materials

• R-134a refrigerant
• Dry nitrogen
(optional)

Electrical

• Insulation
• Flange kit (optional)

“Stealth™ RTAE Installation
Completion Check Sheet and Request
for Trane Service”
(RLC-ADF002-EN,
see “Log and Check Sheet,” p. 90)

Chiller Start-up Commissioning(b)

• Trane, or an agent of
Trane specifically
authorized to perform
start-up of Trane®
products

(a) Trane, or an agent of Trane specifically authorized to perform start-up and warranty of Trane® products, will perform or have direct on-site supervision of
the disassembly and reassembly work.
(b) Start-up must be performed by Trane or an agent of Trane specifically authorized to perform start-up and warranty of Trane® products. Contractor shall
provide Trane (or an agent of Trane specifically authorized to perform start-up) with notice of the scheduled start-up at least two weeks prior to the scheduled
start-up.

RTAE-SVX001B-EN

13

Dimensions and Weights
Weights
Table 5.

Weights
Extended Length Unit(a)

Standard Length Unit

Unit Size
(tons)

Shipping

Operating

lbs

kg

lbs

Shipping
kg

lbs

Operating
kg

lbs

kg

InvisiSound™ Standard or Superior(b)
150S

9436

4280

9596

4353

11013

4995

11173

5068

165S

10451

4741

10611

4813

12011

5448

12171

5521

150

11333

5141

11479

5207

13492

6120

13638

6186

165

12377

5614

12533

5685

14532

6592

14688

6662

180

12698

5760

12880

5843

14853

6737

15035

6820

200

13808

6263

14007

6354

15991

7254

16213

7354

225

15244

6915

15466

7015

17427

7905

17649

8005

250

15622

7086

15861

7195

17805

8076

18044

8185

275

16820

7630

17095

7754

18975

8607

19250

8732

300

17965

8149

18265

8285

20121

9127

20421

9263

InvisiSound Ultimate(c)
150S

10236

4643

10396

4716

11813

5358

11973

5431

165S

11251

5103

11411

5176

12811

5811

12971

5884

150

12133

5504

12279

5570

14292

6483

14438

6549

165

13177

5977

13333

6048

15332

6955

15488

7025

180

13498

6123

13680

6205

15653

7100

15835

7183

200

14608

6626

14807

6716

16791

7616

17013

7717

225

16044

7278

16266

7378

18227

8268

18449

8368

250

16422

7449

16661

7557

18605

8439

18844

8548

275

17620

7992

17895

8117

19775

8970

20050

9095

300

18765

8512

19065

8648

20921

9490

21221

9626

(a) Units are extended length if either of the following are selected:
Transformer (model number digit 28 = 1)
Harmonic Filtration Option (model number digit 29 = 1)
Units without Harmonic Filtration Option or Transformer (digits 28, 29 = 0X) are standard length.
(b) Model number digit 12 = 1 or 2
(c) Model number digit 12 = 3

Unit Dimensions
See unit submittals for specific unit dimensions and water connection locations.

Service Clearances
Figure 5.

RTAE service clearances - top view
NO OBSTRUCTIONS ABOVE UNIT

Control
Panel

NOTES:
1. A full 40” clearance
is required in front
of the control panel.
Must be measured
from front of panel,
not end of unit base.
2. Clearance of 85”
on the side of the
unit is required for
coil replacement.
24”
Preferred side for
(600.1mm) coil replacement is
shown (left side of
unit, as facing control
panel), however either
side is acceptable.

85” (2160mm)
See note 2

40”
(1016
mm)
See
note 1

36” (914.4mm)

TOP VIEW

14

RTAE-SVX001B-EN

Installation Mechanical
Location Requirements
Sound Considerations
•

Refer toTrane Engineering Bulletin Chiller Sound
Ratings and Installation Guide RLC-PRB035-EN for
sound consideration applications.

•

Locate the unit away from sound-sensitive areas.

•

Install the optional elastomeric isolators under the
unit. See “Isolation and Sound Emission,” p. 20.

•

Chilled water piping should not be supported by chiller
frame.

•

Install rubber vibration isolators in all water piping.

•

Use flexible electrical conduit.

•

Seal all wall penetrations.

Note: Consult an acoustical engineer for critical
applications.

Foundation
Provide rigid, non-warping mounting pads or a concrete
foundation of sufficient strength and mass to support the
applicable operating weight (i.e., including completed
piping, and full operating charges of refrigerant, oil and
water). See Table 5, p. 14 for unit operating weights. Once
in place, the unit must be level within 1/4” (6.4 mm) across
the length and width of the unit.TheTrane Company is not
responsible for equipment problems resulting from an
improperly designed or constructed foundation.

WARNING
Heavy Objects!
Ensure that all the lifting equipment used is properly
rated for the weight of the unit being lifted. Each of the
cables (chains or slings), hooks, and shackles used to
lift the unit must be capable of supporting the entire
weight of the unit. Lifting cables (chains or slings) may
not be of the same length. Adjust as necessary for even
unit lift. Other lifting arrangements could cause
equipment or property damage. Failure to follow
instructions above or properly lift unit could result in
unit dropping and possibly crushing operator/
technician which could result in death or serious injury.

WARNING
Proper Lifting Configuration Required!
Use only lift locations designated with label shown in
Figure 6. Do NOT use locations marked with label
shown in Figure 7. Use unit lifting configurations as
shown in Table 6 and Figure 8, p. 16 thru Figure 10,
p. 17. Other lifting arrangements could result in death,
serious injury or equipment damage.
Figure 6.

Label - lift location

Clearances
Provide enough space around the unit to allow the
installation and maintenance personnel unrestricted
access to all service points. See submittal drawings for the
unit dimensions, to provide sufficient clearance for the
opening of control panel doors and unit service. See
Figure 5, p. 14 for minimum clearances. In all cases, local
codes which require additional clearances will take
precedence over these recommendations.

X39003897001A

Figure 7.

Label - do not lift

For close spacing information, see RLC-PRB037-EN.
X39003894001A

Rigging
WARNING
Improper Unit Lift!
Test lift unit approximately 24 inches to verify proper
center of gravity lift point. To avoid dropping of unit,
reposition lifting point if unit is not level. Failure to
properly lift unit could result in unit dropping and
possibly crushing operator/technician which could
result in death or serious injury and possible
equipment or property-only damage.

RTAE-SVX001B-EN

Important:
•

Do not fork lift unit.

•

See unit nameplate and/or unit submittal for total
shipping weight.

•

See Table 6 and Figure 8 thru Figure 10 for unit lifting
configuration.

•

See Table 7, p. 18 and Table 8, p. 19 for lift weights and
dimensions at each lifting point locations.

•

See Table 9, p. 20 for center of gravity information.

15

Installation Mechanical
Table 6.

Lifting configuration selection
Tons

Unit Length(a)

150S, 165S, 150

Standard and Extended

165, 180, 200, 225, 250

Standard

165, 180, 200, 225, 250

Extended

275

Standard

275

Extended

300

Standard and Extended

Lift Configuration

See

4-point

Figure 8, p. 16

6-point

Figure 9, p. 17

8-point

Figure 10, p. 17

(a) Units are extended length if either of the following are selected:
Transformer (model number digit 28 = 1)
Harmonic Filtration Option (model number digit 29 = 1)
Units without Harmonic Filtration Option or Transformer (digits 28, 29 = 0X) are standard length.

Figure 8.

4-point lift configuration
96” (2438mm) Spreader Bar

Lifting Location 2
(Lifting location 3
located on other side of unit)

Control Panel

16

Lifting Location 1
(Lifting location 4
located on other side of unit)

RTAE-SVX001B-EN

Installation Mechanical
Figure 9.

6-point lift configuration
96” (2438mm) Spreader Bar

96”
(2438mm)
Spreader Bar

Lifting Location 3
(Lifting location 4
located on other
side of unit)
Lifting Location 2
(Lifting location 5
located on other side of unit)

Control Panel

Figure 10.

Lifting Location 1
(Lifting location 6
located on other side of unit)

8-point lift configuration
96” (2438mm) Spreader Bar
Qty 2

Lifting Location 4
(Lifting location 5
located on other
side of unit)
Lifting Location 3
(Lifting location 6
located on other side of unit)
Lifting Location 2
(Lifting location 5
located on other side of unit)
Control Panel
Lifting Location 1 (Lifting location 8 located on other side of unit)

RTAE-SVX001B-EN

17

Installation Mechanical
Table 7.

Lift weights by location
Location
1

Tons

lb

2
kg

lb

3
kg

lb

4
kg

lb

5
kg

lb

6
kg

7

8

lb

kg

lb

kg

lb

kg

Standard Length Unit
150S

2540

1152

2451

1112

2164

981

2281

1034

-

-

-

-

-

-

-

-

165S

2656

1205

2352

1067

2730

1238

2713

1230

-

-

-

-

-

-

-

-

150

3426

1554

2638

1197

2234

1014

3035

1377

-

-

-

-

-

-

-

-

165

3452

1566

2876

1304

2810

1275

3239

1469

-

-

-

-

-

-

-

-

180

3528

1600

2941

1334

2896

1314

3333

1512

-

-

-

-

-

-

-

-

200

3586

1627

3325

1508

3316

1504

3581

1624

-

-

-

-

-

-

-

-

225

4003

1816

3551

1611

3617

1641

4073

1847

-

-

-

-

-

-

-

-

250

4098

1859

3637

1650

3711

1683

4176

1894

-

-

-

-

-

-

-

-

275

2484

1127

1943

881

3683

1671

3829

1737

2255

1023

2625

1191

-

-

-

-

300

2061

935

2289

1038

2515

1141

1682

763

2729

1238

3008

1364

1737

788

1943

881

Extended Length Unit(a)
150S

2698

1224

2597

1178

2837

1287

2881

1307

-

-

-

-

-

-

-

-

165S

2988

1356

2841

1289

3135

1422

3047

1382

-

-

-

-

-

-

-

-

150

3825

1735

3363

1525

2920

1324

3384

1535

-

-

-

-

-

-

-

-

165

2653

1203

2629

1192

2570

1166

1959

889

2046

928

2675

1213

-

-

-

-

180

2685

1218

2674

1213

2641

1198

1946

883

2100

953

2807

1273

-

-

-

-

200

2919

1324

2640

1198

2797

1269

2846

1291

2274

1032

2514

1141

-

-

-

-

225

3065

1391

2705

1227

3237

1468

3144

1426

2406

1091

2870

1302

-

-

-

-

250

3117

1414

2749

1247

3322

1507

3229

1465

2458

1115

2930

1329

-

-

-

-

275

2145

973

2668

1210

3279

1487

1513

686

2412

1094

2482

1126

1644

746

2831

1284

300

2056

933

2440

1107

3452

1566

2241

1017

3089

1401

2993

1358

1460

662

2389

1084

(a) Units are extended length if either of the following are selected:
Low Harmonic Distortion Option (model number digit 29 = 1)
Autotransformer (model number digit 28 = 1 or 2)
Units without Low Harmonic Distortion Option or Autotransformer (digits 28, 29 = X0) are standard length.

18

RTAE-SVX001B-EN

Installation Mechanical
Table 8.

Lifting locations (from control panel end of frame)
Location
1

Tons

in

2
mm

in

3
mm

in

4
mm

in

5
mm

in

6
mm

7

8

in

mm

in

mm

in

mm

Standard Length Unit
150S

45.5

1156

45.5

1156

153.9

3909

153.9

3909

-

-

-

-

-

-

-

-

165S

23.5

596

23.5

596

189.7

4818

189.7

4818

-

-

-

-

-

-

-

-

150

39.6

1006

39.6

1006

171.4

4353

171.4

4353

-

-

-

-

-

-

-

-

165

60.4

1534

60.4

1534

224.6

5705

224.6

5705

-

-

-

-

-

-

-

-

180

60.4

1534

60.4

1534

224.6

5705

224.6

5705

-

-

-

-

-

-

-

-

200

53.3

1355

53.3

1355

258.7

6570

258.7

6570

-

-

-

-

-

-

-

-

225

53.3

1355

53.3

1355

258.7

6570

258.7

6570

-

-

-

-

-

-

-

-

250

53.3

1355

53.3

1355

258.7

6570

258.7

6570

-

-

-

-

-

-

-

-

275

75.8

1926

75.8

1926

190.7

4845

190.7

4845

311.9

7922

311.9

7922

-

-

-

-

300

47.6

1210

47.6

1210

171.3

4350

171.3

4350

242.8

6168

242.8

6168

365.1

9274

365.1

9274

Extended Length Unit(a)
150S

23.5

596

23.5

596

207.1

5261

207.1

5261

-

-

-

-

-

-

-

-

165S

23.5

596

23.5

596

242.9

6170

242.9

6170

-

-

-

-

-

-

-

-

150

44.7

1136

44.7

1136

224.6

5705

224.6

5705

-

-

-

-

-

-

-

-

165

61.1

1552

61.1

1552

171.3

4350

171.3

4350

277.8

7057

277.8

7057

-

-

-

-

180

61.1

1552

61.1

1552

171.3

4350

171.3

4350

277.8

7057

277.8

7057

-

-

-

-

200

47.6

1210

47.6

1210

190.7

4845

190.7

4845

311.9

7922

311.9

7922

-

-

-

-

225

47.6

1210

47.6

1210

190.7

4845

190.7

4845

311.9

7922

311.9

7922

-

-

-

-

250

47.6

1210

47.6

1210

190.7

4845

190.7

4845

311.9

7922

311.9

7922

-

-

-

-

275

75.8

1926

75.8

1926

182.0

4623

182.0

4623

258.5

6565

258.5

6565

365.1

9274

365.1

9274

300

47.6

1210

47.6

1210

168.5

4280

168.5

4280

296.1

7520

296.1

7520

418.3

10626

418.3

10626

(a) Units are extended length if either of the following are selected:
Low Harmonic Distortion Option (model number digit 29 = 1)
Autotransformer (model number digit 28 = 1 or 2)
Units without Low Harmonic Distortion Option or Autotransformer (digits 28, 29 = X0) are standard length.

RTAE-SVX001B-EN

19

Installation Mechanical

Center of Gravity
Figure 11.

Isolation and Sound Emission

Center of gravity

The most effective form of isolation is to locate the unit
away from any sound sensitive area. Structurally
transmitted sound can be reduced by elastomeric
vibration eliminators. Spring isolators are not
recommended. Consult an acoustical engineer in critical
sound applications.

CG

For maximum isolation effect, isolate water lines and
electrical conduit. Wall sleeves and rubber isolated piping
hangers can be used to reduce the sound transmitted
through water piping.To reduce the sound transmitted
through electrical conduit, use flexible electrical conduit.

X
SIDE VIEW

State and local codes on sound emissions should always
be considered. Since the environment in which a sound
source is located affects sound pressure, unit placement
must be carefully evaluated. Sound power levels for
Stealth chillers are available on request.

CG

Z

Unit Isolation and Leveling
Y

For additional reduction of sound and vibration, install the
optional elastomeric isolators.

END VIEW
(Non-Control Panel End)

Table 9.

CGx
Tons

Construct an isolated concrete pad for the unit or provide
concrete footings at the unit mounting points. Mount the
unit directly to the concrete pads or footings.

Centers of gravity
in

CGy
mm

in

CGz
mm

in

mm

Standard Length Unit
150S

96.6

2454

43.8

1112

40.4

1025

165S

110.0

2793

45.2

1149

42.8

1087

150

105.5

2679

43.9

1115

37.5

953

165

142.4

3617

43.9

1115

39.7

1008

180

142.8

3628

43.9

1115

39.4

1002

200

155.5

3951

43.9

1115

41.2

1047

225

156.1

3964

43.9

1115

39.8

1011

250

156.4

3973

43.9

1115

39.7

1008

275

194.1

4930

43.9

1115

41.1

1043

300

207.1

5260

43.9

1115

42.4

1076

150S

118.8

3017

44.1

1121

37.2

944

165S

136.4

3464

44.7

1137

39.4

1002

150

134.7

3421

43.9

1115

33.3

846

165

169.1

4295

43.9

1115

35.4

898

180

169.9

4314

43.9

1115

35.2

894

200

181.6

4613

43.9

1115

36.9

937

225

183.6

4665

43.9

1115

36.0

915

250

184.2

4680

43.9

1115

36.0

913

275

220.2

5594

43.9

1115

37.4

950

300

232.3

5900

43.9

1115

38.7

984

Extended Length Unit(a)

Level the unit using the base rail as a reference.The unit
must be level within 1/4-in (6 mm) over the entire length
and width. Use shims as necessary to level the unit.

Elastomeric Isolators
(Optional for units without seismic rating)
Note: See unit submittal, or Table 11, p. 21 thru Table 13,
p. 23 for point weights, isolator location and
isolator selections.
1. Secure the isolators to the mounting surface using the
mounting slots in the isolator base plate. Do not fully
tighten the isolator mounting bolts at this time.
2. Align the mounting holes in the base of the unit with
the threaded positioning pins on the top of the
isolators.
3. Lower the unit onto the isolators and secure the
isolator to the unit with a nut.
4. Level the unit carefully. Fully tighten the isolator
mounting bolts.

(a) Units are extended length if either of the following are selected:
Low Harmonic Distortion Option (model number digit 29 = 1)
Autotransformer (model number digit 28 = 1 or 2)
Units without Low Harmonic Distortion Option or Autotransformer (digits
28, 29 = X0) are standard length.

20

RTAE-SVX001B-EN

Installation Mechanical
Elastomeric Isolation Pads for Seismic Option

5.

Figure 12. Elastomeric isolator

Elastomeric pads ship inside the unit control panel.They
are provided with an isolation washer and 3/4” free hole in
the center of the plate.
5.0 in

1/2 - 13NC - 2B

Figure 13. Seismic isolation pad — installed

4.63 in
0.56 in

0.50 in
1.60 ± .25 in

Table 10.

Seismically rated elastomeric isolation pad
Dimension (in)

Mounting molded in neoprene

Model

Max Load

Length

Width

Height

B-36

2520

6

6

.625

3.0 in

Figure 14. Mounting point locations(a)
2

4

6

8

10

1

3

5

7

9

Control panel

2.75 in

0.38 in

Max Load
(lbs)

Color

Maximum
Deflection (in)

Type

2250

RED

0.50

RDP-4

3000

GREEN

0.50

RDP-4

(a) Quantity of isolators varies with unit. Shorter units will not use locations
5 and 6. See submittal for actual number required for specific unit.

Table 11.

Point weights
Location
1

2

3

4

5

6

Tons

lb

kg

lb

kg

lb

kg

lb

kg

lb

kg

150S

1731

785

1664

755

1834

832

1773

804

1219

553

165S

1666

756

1559

707

1886

855

1870

848

1914

868

150

1452

659

1543

700

1326

602

1446

656

1464

165

1539

698

1341

608

1622

736

1553

704

180

1536

697

1338

607

1676

760

1620

735

200

1442

654

1764

800

1696

769

1810

225

1430

649

1792

813

1999

907

250

1426

647

1803

818

2064

275

1624

737

1627

738

1802

300

1634

741

1850

839

1871

lb

7

8

9

10

kg

lb

kg

lb

kg

lb

kg

lb

kg

1375

624

-

-

-

-

-

-

-

-

1716

778

-

-

-

-

-

-

-

-

664

1350

612

1490

676

1262

572

-

-

-

-

1657

752

1607

729

1522

690

1536

697

-

-

-

-

1709

775

1659

753

1579

716

1581

717

-

-

-

-

821

1836

833

1694

768

1986

901

1580

717

-

-

-

-

2058

933

2111

958

1994

905

2139

970

1721

781

-

-

-

-

936

2144

973

2182

990

2055

932

2195

996

1753

795

-

-

-

-

817

1746

792

1795

814

1530

694

1653

750

1831

830

1577

715

1634

741

849

1925

873

1898

861

1938

879

1887

856

1695

769

1752

795

1515

687

Standard Length

RTAE-SVX001B-EN

21

Installation Mechanical
Table 11.

Point weights (continued)
Location
1

Tons

lb

2
kg

lb

3
kg

lb

4
kg

lb

5
kg

lb

6
kg

lb

7
kg

8

9

10

lb

kg

lb

kg

lb

kg

lb

kg

Extended Length Unit(a)
150S

1553

704

1795

814

1974

895

1959

889

2088

947

1804

818

-

-

-

-

-

-

-

-

165S

1344

610

1236

561

1537

697

1494

678

1686

765

1668

757

1636

742

1570

712

-

-

-

-

150

1563

709

1621

735

1705

773

1875

850

1952

885

1575

714

1601

726

1601

726

-

-

-

-

165

1776

806

1827

829

1956

887

1925

873

2058

933

1958

888

1517

688

1515

687

-

-

-

-

180

1774

805

1822

827

1990

903

1975

896

2128

965

2030

921

1577

715

1557

706

-

-

-

-

200

1706

774

1524

691

1662

754

1294

587

1938

879

1738

788

1267

575

1753

795

1457

661

1652

749

225

1857

842

1669

757

1844

836

1412

640

2156

978

1860

844

1378

625

1985

900

1501

681

1766

801

250

1852

840

1664

755

1885

855

1439

653

2219

1006

1936

878

1438

652

2046

928

1530

694

1795

814

275

1874

850

1860

844

1626

737

1700

771

2204

1000

2101

953

2017

915

2131

967

1820

826

1642

745

300

1946

883

1826

828

1854

841

1795

814

2143

972

2106

955

2408

1092

2338

1060

1808

820

1898

861

(a) Units are extended length if either of the following are selected:
Low Harmonic Distortion Option (model number digit 29 = 1)
Autotransformer (model number digit 28 = 1 or 2)
Units without Low Harmonic Distortion Option or Autotransformer (digits 28, 29 = X0) are standard length.

Table 12.

Isolator locations(a)
Location
1

2

3

Tons

in

mm

in

mm

150S

23.6

600

27.6

700

165S

15.7

400

23.0

585

150

24.4

620

11.8

165

17.7

450

180

17.7

450

200

23.6

225

in

4
mm

in

5
mm

in

6
mm

in

7
mm

8

9

10

in

mm

in

mm

in

mm

in

mm

2400 187.0 4750 187.0 4750

-

-

-

-

-

-

-

-

98.4

2500 102.2 2595 196.9 5000 204.7 5200

-

-

-

-

-

-

-

-

300

47.2

1200

2100 100.4 2550 153.5 3900 188.2 4780 188.2 4780

-

-

-

-

23.0

585

98.6

2505 102.2 2595 155.5 3950 190.6 4840 242.1 6150 242.9 6170

-

-

-

-

23.0

585

98.6

2505 102.2 2595 155.5 3950 190.6 4840 242.1 6150 242.9 6170

-

-

-

-

600

23.6

600

102.4 2600 137.8 3500 155.5 3950 198.8 5050 255.9 6500 263.8 6700

-

-

-

-

23.6

600

23.6

600

102.4 2600 137.8 3500 155.5 3950 198.8 5050 255.9 6500 263.8 6700

-

-

-

-

250

23.6

600

23.6

600

102.4 2600 137.8 3500 155.5 3950 198.8 5050 255.9 6500 263.8 6700

-

-

-

-

275

21.7

550

18.9

480

141.3 3590 125.2 3180 196.1 4980 236.2 6000 236.2 6000 259.8 6598 328.0 8330 324.4 8240

300

19.7

500

27.6

700

143.1 3634 143.1 3634 202.4 5142 235.6 5984 257.9 6551 296.6 7534 347.8 8834 339.5 8624

Standard Length
102.4 2600

94.5

82.7

Extended Length Unit(b)
150S

19.7

500

15.7

400

-

-

-

-

165S

23.6

600

23.6

600

102.4 2600 133.9 3400 204.7 5200 208.7 5300
86.6

2200

78.7

2000 149.6 3800 157.5 4000 259.8 6600 259.8 6600

-

-

-

-

-

-

-

-

150

25.0

635

23.6

600

84.6

2150

98.4

2500 147.6 3750 190.9 4850 240.2 6100 240.2 6100

-

-

-

-

165

19.7

500

19.7

500

129.9 3300 129.9 3300 204.7 5200 234.3 5950 293.3 7450 299.2 7600

-

-

-

-

180

19.7

500

19.7

500

129.9 3300 129.9 3300 204.7 5200 234.3 5950 293.3 7450 299.2 7600

-

-

-

-

200

25.6

650

19.7

500

118.1 3000

98.4

2500 208.7 5300 196.9 5000 255.9 6500 255.9 6500 315.0 8000 315.0 8000

225

25.6

650

19.7

500

118.1 3000

98.4

2500 208.7 5300 196.9 5000 255.9 6500 255.9 6500 315.0 8000 315.0 8000

250

25.6

650

19.7

500

118.1 3000

98.4

2500 208.7 5300 196.9 5000 255.9 6500 255.9 6500 315.0 8000 315.0 8000

275

6.3

160

9.8

250

177.2 4500 139.8 3550 198.8 5050 242.1 6150 309.1 7850 313.0 7950 354.3 9000 370.1 9400

300

9.8

250

9.8

250

177.2 4500 139.8 3550 206.7 5250 242.1 6150 311.8 7920 313.4 7960 393.7 10000 393.7 10000

(a) Dimensions are referenced from end of frame on the control panel side.
(b) Units are extended length if either of the following are selected:
Low Harmonic Distortion Option (model number digit 29 = 1)
Autotransformer (model number digit 28 = 1 or 2)
Units without Low Harmonic Distortion Option or Autotransformer (digits 28, 29 = X0) are standard length.

22

RTAE-SVX001B-EN

Installation Mechanical
Table 13.

Isolator selections
Location

Tons

1

2

3

4

5

6

7

8

9

10
-

Standard Length Unit
150S

Red 62

Red 62

Red 62

Red 62

Red 62

Red 62

-

-

-

165S

Red 62

Red 62

Red 62

Red 62

Red 62

Red 62

-

-

-

-

150

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

165

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

180

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

200

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

225

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

250

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

275

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

300

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

-

-

Extended Length Unit(a)
150S

Red 62

Red 62

Green 63

Green 63

Green 63

Red 62

165S

Red 62

Red 62

Red 62

Red 62

Red 62

Red 62

Red 62

Red 62

-

-

150

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

165

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

180

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

-

-

200

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

225

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

250

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

275

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

300

Red 62

Red 62

Green 63

Green 63

Green 63

Green 63

Green 63

Green 63

Red 62

Red 62

(a) Units are extended length if either of the following are selected:
Low Harmonic Distortion Option (model number digit 29 = 1)
Autotransformer (model number digit 28 = 1 or 2)
Units without Low Harmonic Distortion Option or Autotransformer (digits 28, 29 = X0) are standard length.

Compressor Shipping Bolt Removal
Units with InvisiSound™ Ultimate Option
(Model Number Digit 12 = 3)
For chillers built with InvisiSound Ultimate option,
compressor shipping bolts must be removed to assure
minimum noise during operation. Use a 24mm socket to
remove the (3) M15 x 75mm shipping bolts for each
compressor.They are located under compressor
mounting feet. See Figure 15.

Figure 15. Compressor shipping bolt removal
Isolator
Compressor
Compressor
Mounting
Foot

Shipping Bolt

Important:
•

DO NOT DISCARD SHIPPING BOLTS. Store bolts in the
control panel for future use.

•

All shipping bolts MUST be reinstalled prior to
compressor removal or unit move.

NOTICE:
Equipment Damage!
Do not remove compressor or move unit without
reattaching compressor shipping bolts. Failure to
reinstall bolts could cause shifting of parts and result in
equipment damage.
RTAE-SVX001B-EN

Drainage
Locate the unit near a large capacity drain for water vessel
drain-down during shutdown or repair. Evaporators are
provided with drain connections. A vent on top of
evaporator waterbox prevents vacuum by allowing air into
evaporator for complete drainage. All local and national
codes apply.
23

Installation Mechanical

Evaporator Piping
RTAE units are available with 2 or 3 pass configurations.
See Figure 16.
Figure 16. Evaporator pass configurations

2-Pass Evaporators
Control Panel End

Inlet Water
Connection

Top View
(Condenser removed for clarity)

Outlet Water
Connection

Outlet

Inlet

End View
(Non-control panel end)

3-Pass Evaporators
Control Panel End

Outlet Waterbox

Inlet Waterbox
(Outlet waterbox
opposite end)

Top View
(Condenser removed for clarity)

NOTICE:
Proper Water Treatment!
The use of untreated or improperly treated water could
result in scaling, erosion, corrosion, algae or slime. It is
recommended that the services of a qualified water
treatment specialist be engaged to determine what
water treatment, if any, is required. Trane assumes no
responsibility for equipment failures which result from
untreated or improperly treated water, or saline or
brackish water.

NOTICE:
Evaporator Damage!
The chilled water connections to the evaporator are to
be “victaulic” type connections. Do not attempt to
weld these connections, as the heat generated from
welding can cause microscopic and macroscopic
fractures on the cast iron waterboxes that can lead to
premature failure of the waterbox. To prevent damage
to chilled water components, do not allow evaporator
pressure (maximum working pressure) to exceed 150
psig (10.5 bar).

24

Inlet Waterbox

End View
(Non-control panel end)

Evaporator water connections are grooved.
Thoroughly flush all water piping to the unit before making
the final piping connections to the unit.
Components and layout will vary slightly, depending on
the location of connections and the water source.
A vent is provided on the top of the evaporator at the
chilled water inlet. Be sure to provide additional vents at
high points in the piping to bleed air from the chilled water
system. Install necessary pressure gauges to monitor the
entering and leaving chilled water pressures.
Provide shutoff valves in lines to the gauges to isolate
them from the system when they are not in use. Use
rubber vibration eliminators to prevent vibration
transmission through the water lines.
If desired, install thermometers in the lines to monitor
entering and leaving water temperatures. Install a
balancing valve in the leaving water line to control water
flow balance. Install shutoff valves on both the entering
and leaving water lines so that the evaporator can be
isolated for service

RTAE-SVX001B-EN

Installation Mechanical

Evaporator Piping Components
Piping components include all devices and controls used
to provide proper water system operation and unit
Figure 17.

operating safety. SeeThese components and their general
locations are given below.

Typical Stealth™ water piping
6

4

5

8

7

B

3

2

A

2
1

A
2

8

C

3

2
A

Table 14. Water piping components
Item

Description

Item

Description

1

Bypass Valve

Pi

Pressure Gauge

2

Isolation Valve

FT

Water Flow Switch

3

Vibration Eliminator

T1

Evap Water Inlet Temp Sensor

4

Evaporator - End View (2-pass)

T2

Evap Water Outlet Temp Sensor

5

Evaporator Waterbox (2-pass)

6

Vent

A

Isolate unit for initial water loop cleaning

7

Strainer

B

Vent must be installed at the high point of the line

8

Drain

C

Drain must be installed at the low point of the line

NOTES

Entering Chilled Water Piping

Drains

•
•
•
•
•
•

A 1/2” drain connection is located under outlet end of
evaporator waterbox for drainage during unit servicing. A
shutoff valve must be installed on drain line.

Air vents (to bleed air from system).
Water pressure gauges with shutoff valves.
Vibration eliminators.
Shutoff (isolation) valves.Thermometers (if desired).
Clean-out tees.
Pipe strainer.

Leaving Chilled Water Piping
•
•
•

Air vents (to bleed air from system).
Water pressure gauges with shutoff valves.
Vibration eliminators.

•
•
•
•

Shutoff (isolation) valves.
Thermometers.
Clean-out tees.
Balancing valve.

RTAE-SVX001B-EN

Pressure Gauges
Install field-supplied pressure components as shown in
Figure 17, p. 25. Locate pressure gauges or taps in a
straight run of pipe; avoid placement near elbows, etc. Be
sure to install the gauges at the same elevation on each
shell if the shells have opposite-end water connections.
To read manifolded pressure gauges, open one valve and
close the other (depending upon the reading desired).This
eliminates errors resulting from differently calibrated
gauges installed at unmatched elevations.

25

Installation Mechanical
Pressure Relief Valves

NOTICE:
Evaporator Damage!
To prevent shell damage, install pressure relief valves in
the evaporator water system.
Install a water pressure relief valve in the evaporator inlet
piping between the evaporator and the inlet shutoff valve,
as shown in Figure 17, p. 25. Water vessels with closecoupled shutoff valves have a high potential for
hydrostatic pressure buildup on a water temperature
increase. Refer to applicable codes for relief valve
installation guidelines.

Indexing Flow Switch
To properly index the flow switch, the following
requirements must be met:
•

The dot must be at a position no greater than 90° off
Index.

•

The torque must be between 22 ft-lb minimum and 74
ft-lb maximum.

•

A minimum distance of 5x pipe diameter must be
maintained between flow switch and any bends,
valves, changes in cross sections, etc.

Figure 18. Proper flow switch indexing

Top View

Evaporator Flow Switch
Flow

NOTICE:
Equipment Damage!

Index

Flow switch is on a 24V circuit. Do NOT apply 120V to
the flow switch. Incorrect voltage application could
cause damage to the flow switch.
The flow switch is factory-installed and programmed
based on the operating conditions submitted with the
order.The leaving evaporator temperature, fluid type and
fluid concentration affect the selected flow switch. If the
operating conditions on the job site change, the flow
switch may need to be replaced. Contact your localTrane
Sales office for more information.

The flow switch must have the dot
in the shaded area to the left of this line
for proper indexing (±90° off Index)

The sensor head includes 3 LEDs, two yellow and one
green.Wait 15 seconds after power is applied to the sensor
before evaluating LEDs for flow status. When wired
correctly and flow is established, only the green LED
should be lit. Following are the LED indicators:
•

Green ON, both yellow OFF — Flow

•

Green and outside yellow ON — No Flow

•

Center yellow ON continuously — Miswire

Factory installed jumper wire W11 must be removed if
using auxiliary contacts and/or additional proof of flow.
See schematics in RTAE-SVE01*-EN for more details.

NOTICE:
Equipment Damage!
Incorrect wiring of auxiliary contacts could cause
equipment damage.
If using auxiliary flow sensing, both yellow LEDs come on
initially when flow is stopped.The center yellow LED will
turn off after approximately 7 seconds.The LED indicators
are otherwise the same as indicated above.

26

RTAE-SVX001B-EN

Installation Mechanical

Evaporator Waterside Pressure Drop Curves
Figure 19. Evaporator waterside pressure drop curve — 2-pass
p

50

300T

47.5
45

275T

42.5

250T

40

225T

37.5

200T

35
Pressure Drop (ft. H2O)

p

32.5

185T

30

165T

27.5

150T

25

150S,
165S

22.5
20
17.5
15
12.5
10
7.5
5
2.5
0
0

200

400

600

800

1000

1200

1400

Water Flow (GPM)

RTAE-SVX001B-EN

27

Installation Mechanical
Figure 20. Evaporator waterside pressure drop curve — 3-pass
75
300T

70

275T

65

250T

Pressure Drop (ft. H2O)

60

225T

55

200T

50

185T

45

165T

40

150T

35

150S,
165S

30
25
20
15
10
5
0
0

100

200

300

400

500

600

700

800

900

1000

Water Flow (GPM)

28

RTAE-SVX001B-EN

Installation Mechanical

Freeze Protection
One or more of the ambient freeze avoidance methods in
Table 15 must be used to protect the Stealth chiller from
ambient freeze damage.
Table 15.

RTAC freeze avoidance methods

Method

Protects to
ambient
temperature

Notes
• Heaters alone will provide low ambient protection down to -20°F (-29°C), but will NOT
protect the evaporator from freezing as a result of charge migration. Therefore, it is
required that water pump control be used in conjunction with heaters.
• Heaters are factory-installed on the evaporator and water piping and will protect them from freezing
• Install heat tape on all water piping, pumps, and other components that may be damaged if exposed
to freezing temperatures. Heat tape must be designed for low ambient temperature applications. Heat
tape selection should be based on the lowest expected ambient temperature.
• Tracer™ UC800 controller can start the pump when freezing conditions are detected. For this option
the pump must to be controlled by the Stealth unit and this function must be validated.
• Water circuit valves need to stay open at all times.
• Water pump control and heater combination will protect the evaporator down to any
ambient temperature provided power is available to the pump and the controller. This
option will NOT protect the evaporator in the event of a power failure to the chiller unless
backup power is supplied to the necessary components.
• When no chiller operation is possible and the pump is already off, UC800 pump control for freeze
protection will command the pump to turn:
ON if average of the evaporator entering water temperature, the evaporator leaving water
temperature, and the evaporator refrigerant pool temperature is less than Low Evaporator Refrigerant
Temperature Cutout (LERTC) + 4°F for a period of time.
OFF again if the evaporator refrigerant pool temperature rises above the LERTC + 6°F for a period
of time.
Note: Time period referenced for ON and Off conditions above is dependent on past running conditions
and present temperatures measured.
ON if entering OR leaving water temperature< LWTC for 30°F-sec (17°C-sec)
OFF again if water temperature > LWTC for 30 min

Water Pump Control
AND Heaters

Down to -20°F

Freeze Inhibitor

Varies.
• Freeze protection can be accomplished by adding sufficient glycol to protect against freezing below
See “Low
the lowest ambient expected.
Evaporator
• Use of glycol type antifreeze reduces the cooling capacity of the unit and must be
Refrigerant Cutout,
considered in the design of the system specifications.
Glycol
Requirements,”
p. 30

Drain Water Circuit

Below -20°F

• Shut off the power supply to the unit and to all heaters.
• Purge the water circuit.
• Blow out the evaporator to ensure no liquid is left in the evaporator.

NOTICE:
Evaporator Damage!
If insufficient concentration or no glycol is used, the
evaporator water flow must be controlled by the UC800
AND heaters must be used to avoid catastrophic
damage to the evaporator due to freezing. It is the
responsibility of the installing contractor and/or the
customer to ensure that a pump will start when called
upon by the chiller controls. Refer to RLC-PRB012-EN.
Even with water pump control, a power loss of as little
as 15 minutes under freezing conditions can damage
the evaporator. Only the proper addition of freeze
inhibitor or complete drainage of the water circuit can
ensure no evaporator damage in the event of a power
failure.

RTAE-SVX001B-EN

29

Installation Mechanical

Low Evaporator Refrigerant Cutout, Glycol Requirements
The table below shows the low evaporator temperature
cutout for different glycol levels. Additional glycol beyond
the recommendations will adversely effect unit
performance.The unit efficiency will be reduced and the
saturated evaporator temperature will be reduced. For
some operating conditions this effect can be significant.

Note: Table below is not a substitute for full unit
simulation for proper prediction of unit
performance for specific operating conditions. For
information on specific conditions, contactTrane
product support.

If additional glycol is used, then use the actual percent
glycol to establish the low refrigerant cutout setpoint.
Table 16.

Low evaporator refrigerant temperature cutout (LERTC) and low water temperature cutout (LWTC)
Ethylene Glycol

Propylene Glycol

Glycol
Percentage
(%)

Solution
Freeze Point
(°F)

Minimum
Recommended
LERTC (°F)

Minimum
Recommended
LWTC (°F)

Glycol
Percentage
(%)

Solution
Freeze Point
(°F)

Minimum
Recommended
LERTC (°F)

Minimum
Recommended
LWTC (°F)

0

32.0

28.6

35.0

0

32.0

28.6

35.0

2

31.0

27.6

34.0

2

31.0

27.6

34.0

4

29.7

26.3

32.7

4

29.9

26.5

32.9

5

29.0

25.6

32.0

5

29.3

25.9

32.3

6

28.3

24.9

31.3

6

28.7

25.3

31.7

8

26.9

23.5

29.9

8

27.6

24.2

30.6

10

25.5

22.1

28.5

10

26.4

23.0

29.4

12

23.9

20.5

26.9

12

25.1

21.7

28.1

14

22.3

18.9

25.3

14

23.8

20.4

26.8

15

21.5

18.1

24.5

15

23.1

19.7

26.1

16

20.6

17.2

23.6

16

22.4

19.0

25.4

18

18.7

15.3

21.7

18

20.9

17.5

23.9

20

16.8

13.4

19.8

20

19.3

15.9

22.3

22

14.7

11.3

17.7

22

17.6

14.2

20.6

24

12.5

9.1

15.5

24

15.7

12.3

18.7

25

11.4

8.0

14.4

25

14.8

11.4

17.8

26

10.2

6.8

13.2

26

13.8

10.4

16.8

28

7.7

4.3

10.7

28

11.6

8.2

14.6

30

5.1

1.7

8.1

30

9.3

5.9

12.3

32

2.3

-1.1

5.3

32

6.8

3.4

9.8

34

-0.7

-4.1

5.0

34

4.1

0.7

7.1

35

-2.3

-5.0

5.0

35

2.7

-0.7

5.7

36

-3.9

-5.0

5.0

36

1.3

-2.1

5.0

38

-7.3

-5.0

5.0

38

-1.8

-5.0

5.0

40

-10.8

-5.0

5.0

40

-5.2

-5.0

5.0

42

-14.6

-5.0

5.0

42

-8.8

-5.0

5.0

44

-18.6

-5.0

5.0

44

-12.6

-5.0

5.0

45

-20.7

-5.0

5.0

45

-14.6

-5.0

5.0

46

-22.9

-5.0

5.0

46

-16.7

-5.0

5.0

48

-27.3

-5.0

5.0

48

-21.1

-5.0

5.0

50

-32.1

-5.0

5.0

50

-25.8

-5.0

5.0

30

RTAE-SVX001B-EN

Installation Electrical
General Recommendations
As you review this manual, keep in mind that:
• All field-installed wiring must conform to National
Electric Code (NEC) guidelines, and any applicable
state and local codes. Be sure to satisfy proper
equipment grounding requirements per NEC.
• Compressor motor and unit electrical data (including
motor kW, voltage utilization range, rated load amps)
is listed on the chiller nameplate.
• All field-installed wiring must be checked for proper
terminations, and for possible shorts or grounds.
• All electrical enclosures on CE marked chillers (unit
model number digit 13 = C) have an environmental
rating of IP53.
Note: Always refer to wiring diagrams shipped with
chiller or unit submittal for specific electrical
schematic and connection information.

WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run and AFD
(Adaptive Frequency™ Drive) capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power cannot be inadvertently energized.
•

•

For variable frequency drives or other energy storing
components provided byTrane or others, refer to the
appropriate manufacturer’s literature for allowable
waiting periods for discharge of capacitors. Verify
with an appropriate voltmeter that all capacitors
have discharged.
DC bus capacitors retain hazardous voltages after
input power has been disconnected. Follow proper
lockout/tagout procedures to ensure the power
cannot be inadvertently energized. After
disconnecting input power, wait five (5) minutes for
the DC capacitors to discharge, then check the
voltage with a voltmeter. Make sure DC bus
capacitors are discharged (0 VDC) before touching
any internal components.

Failure to follow these instructions could result in death
or serious injury.
For additional information regarding the safe discharge
of capacitors, see “Adaptive Frequency™ Drive (AFD3)
Capacitor Discharge,” p. 32 and PROD-SVB06A-EN.

WARNING
Hazardous Voltage - Pressurized Burning
Fluid!
The motors in the compressors have strong permanent
magnet motors and have the capability to generate
voltage during situations when the refrigerant charge is
being migrated. This potential will be present at the
motor terminals and at the output of the variable speed
drives in the power panel.
Before removing compressor terminal box cover for
servicing, or servicing power side of control panel,
CLOSE COMPRESSOR DISCHARGE SERVICE VALVE
and disconnect all electric power including remote
disconnects. Discharge all motor start/run capacitors.
Follow lockout/tagout procedures to ensure the power
cannot be inadvertently energized. Verify with an
appropriate voltmeter that all capacitors have
discharged.
The compressor contains hot, pressurized refrigerant.
Motor terminals act as a seal against this refrigerant.
Care should be taken when servicing NOT to damage
or loosen motor terminals.
Do not operate compressor without terminal box cover
in place.
Failure to follow all electrical safety precautions could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see “Adaptive Frequency™ Drive (AFD3)
Capacitor Discharge,” p. 32 and PROD-SVB06A-EN.

WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as described
in NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.

NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types
of conductors. Failure to use copper conductors could
result in equipment damage.
Important: To prevent control malfunctions, do not run
low voltage wiring (<30 V) in conduit with
conductors carrying more than 30 volts.

RTAE-SVX001B-EN

31

Installation Electrical

Adaptive Frequency™ Drive (AFD3)
Capacitor Discharge

Units with Nitrogen Charge Option

After disconnecting input power, wait five (5) minutes for
the DC capacitors to discharge.
Using voltmeter, measure voltage on bus at bus indicator
module tabs 1 and 2, accessed through slots in protective
cover on drive. See Figure 21, p. 32 for location of bus
indicator module on the AFD drive. See Figure 22, p. 32 for
details of bus indicator module. Capacitors are fully
discharged when voltage across these tabs measures 0
VDC.
Figure 21.

AFD board - indicator location

N2
For units with nitrogen charge option (model number digit
15 = 2), the unit must NOT have shore power, or unit power
applied until the unit has been charged. Applying power
will drive EXV valves closed, and will inhibit sufficient vac
for unit charging.

Installer-Supplied Components
Customer wiring interface connections are shown in the
electrical schematics and connection diagrams that are
shipped with the unit.The installer must provide the
following components if not ordered with the unit:
•

Power supply wiring (in conduit) for all field-wired
connections.

•

All control (interconnecting) wiring (in conduit) for
field supplied devices.

•

Fused-disconnect switches or circuit breakers.

Bus
Indicator
Module

Figure 22. Bus indicator module detail
Tab 2
(-) Bus

Tab 1
(+) Bus

Bus Charge
Indicator

DC Bus Voltage
Indicator LED

32

RTAE-SVX001B-EN

Installation Electrical

All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.

NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types
of conductors. Failure to use copper conductors could
result in equipment damage.
Incoming customer power location varies with unit
configurations.
•

• Standard length units
(model number digits 28, 29 = 0X)

WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives or
other energy storing components provided by Trane or
others, refer to the appropriate manufacturer’s literature
for allowable waiting periods for discharge of
capacitors. Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect power
and discharge capacitors before servicing could result in
death or serious injury.

Control Panel (see Figure 23)

• Units with optional harmonic filtration
(model number digit 29 = 1)
•

Transformer (see Figure 24, p. 34)
• 200, 230 or 575 V units with transformer
(model number digit 28 = 1)

Figure 23. Incoming customer power - control panel
Standard Length Units
(model number digits 28, 29 = 0X)
Incoming Customer
Power Location
Control Panel

WARNING
Proper Field Wiring and Grounding
Required!

The type and installation location(s) of the fused
disconnects must comply with all applicable codes.

DC bus capacitors retain hazardous voltages after input
power has been disconnected. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. After disconnecting input
power, wait five (5) minutes for the DC capacitors to
discharge and then check the voltage with a voltmeter
to ensure the dc bus capacitors are discharged before
touching any internal components. Failure to observe
this precaution could result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see “Adaptive Frequency™ Drive (AFD3)
Capacitor Discharge,” p. 32 and PROD-SVB06A-EN.
All power supply wiring must be sized and selected
accordingly by the project engineer in accordance with
NECTable 310-16.
All wiring must comply with local codes and the National
Electrical Code.The installing (or electrical) contractor
must provide and install the system interconnecting
wiring, as well as the power supply wiring. It must be
properly sized and equipped with the appropriate fused
disconnect switches.

RTAE-SVX001B-EN

Unit with optional Harmonic Filtration
(model number digit 29 = 1)
Pulse Auto Transformer
(harmonic filtration)

Incoming
Customer
Power
Location

Control Panel

Power Supply Wiring

Incoming Customer Power Location
Unit Control Panel - right side view

Incoming
Customer
Power
Location

33

Installation Electrical
Figure 24. Incoming customer power - transformer

200V, 230V and 575V units
(Includes optional Transformer
model number digit 28 = 1)

Incoming Customer
Power Location
(located on transformer)

Service Power Connection
The service power connection is a touch safe procedure to
allow for binding the control system and LLIDs. Service
power connection allows for a NEMA 5-15 style extension
cord to power on Class 2 devices (i.e. UC800, LLIDs, EXVs,
andTD7 display) with an external power source, without
the need of line voltage applied to the unit.This connection
is to be made at 1XJ50.The extension cord power source
is required to have upstream current protection rated at no
more than 10A.The required voltage for the service power
connection is 115V at 60Hz and 110V at 50Hz.

Heater Power Supply

Right side of unit
Incoming Customer Power Location
On Transformer
Incoming Customer
Power Location
(located on transformer)

The evaporator shell is insulated from ambient air and
protected from freezing temperatures by thermostaticallycontrolled immersion heaters. See Table 17 for evaporator
heater summary. Whenever the water temperature drops
to approximately 37°F (2.8°C), the thermostat energizes
the heaters.The heaters will provide protection from
ambient temperatures down to -20°F (-29°C).

NOTICE:
Equipment Damage!
Control panel main processor does not verify
thermostat operation. A qualified technician must
confirm operation of the thermostat to avoid
catastrophic damage to the evaporator.
Table 17.

End of Unit
(non-control panel end)

Evaporator heater summary
Waterboxes

Unit Size (tons)

Supply

Return

150-165

400W

400W

180-200

400W (Qty 2)

400W

225-300

600W

600W

400W (Qty 2)

400W

2-pass Evaporator

Cut holes into the location shown above for the
appropriately-sized power wiring conduits.The wiring is
passed through these conduits and connected to the
terminal blocks, optional unit-mounted disconnects, or
HACR type breakers.
The high voltage field-provided connections are made
through patch plate on the right side of the main control
panel or on the right side of the voltage autotransformer
panel.

3-pass Evaporator
All sizes

The low voltage connections are made through knockouts
provided on the left side of the control panel. Additional
grounds may be required for each 115 volt power supply to
the unit. Green lugs are provided for 115V customer
wiring.

Control Power Supply
The unit is equipped with a control power transformer. It
is not necessary to provide additional control power
voltage to the unit. No other loads should be connected to
the control power transformer.
All units are factory-connected for appropriate labeled
voltages.
34

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Installation Electrical

Interconnecting Wiring

cleared, the EWP is re-energized, and normal control
resumed.

Chilled Water Pump Control

If evaporator water flow is lost once it had been
established, the EWP relay remains energized and a nonlatching diagnostic is generated. If flow returns, the
diagnostic is cleared and the chiller returns to normal
operation.

NOTICE:
Equipment Damage!
If the microprocessor calls for a pump to start and
water does not flow, the evaporator may be damaged
catastrophically. It is the responsibility of the installing
contractor and/or the customer to ensure that a pump
will always be running when called upon by the chiller
controls.
An evaporator water pump output relay closes when the
chiller is given a signal to go into the Auto mode of
operation from any source.The contact is opened to turn
off the pump in the event of most machine level
diagnostics to prevent the build up of pump heat.
The relay output is required to operate the Evaporator
Water Pump (EWP) contactor. Contacts should be
compatible with 115/240 VAC control circuit. Normally, the
EWP relay follows the AUTO mode of the chiller.Whenever
the chiller has no diagnostics and is in the AUTO mode,
regardless of where the auto command is coming from,
the normally open relay is energized. When the chiller
exits the AUTO mode, the relay is timed to open in an
adjustable (usingTechView) 0 to 30 minutes.The nonAUTO modes in which the pump is stopped, include Reset,
Stop, External Stop, Remote Display Stop, Stopped by
Tracer, Start Inhibited by Low AmbientTemp, and Ice
Building complete.
Table 18.

Pump Relay Operation

Chiller Mode

Relay Operation

Auto

Instant Close

Ice Building

Instant Close

Tracer Override

Close

Stop

Timed Open

Ice Complete

Instant Open

Diagnostics

Instant Operation(a)

Chiller Shutdown
Diagnostics
(except freeze protection)

Instant Open

•

Low Chilled Water Temperature diagnostic
(non-latching unless also accompanied by an Evap
Leaving WaterTemperature Sensor Diagnostic)

or
•

Interrupt Failure —AFDxA diagnostic (where x is
either 1 or 2 to indicate which drive is affected), in
which a compressor continues to draw current even
after commanded to have shutdown.

or
•

Loss of Evaporator Water Flow diagnostic (nonlatching) and the unit is in the AUTO mode, after
initially having proven evaporator water flow.

Programmable Relays
A programmable relay concept provides for enunciation of
certain events or states of the chiller, selected from a list of
likely needs, while only using four physical output relays,
as shown in the field wiring diagram.The four relays are
provided (generally with a Quad Relay Output LLID) as part
of the Programmable Relay Option.The relay’s contacts
are isolated Form C (SPDT), suitable for use with 120 VAC
circuits drawing up to 2.8 amps inductive, 7.2 amps
resistive, or 1/3 HP and for 240 VAC circuits drawing up to
0.5 amp resistive.
The list of events/states that can be assigned to the
programmable relays can be found in Table 19.The relay
will be energized when the event/state occurs.
Table 19.

Alarm and status relay output configuration
table
Description

Freeze Protection related
Delayed/Dependent Open
chiller shutdown diagnostics
Chiller Off Cycle Freeze
Diagnostics

In general, when there is either a non-latching or latching
diagnostic, the EWP relay is turned off as though there was
a zero time delay. Exceptions whereby the relay continues
to be energized occur with:

Alarm - Latching

This output is true whenever there is any
active latching shutdown diagnostic that
targets the Unit, Circuit, or any of the
Compressors on a circuit.

Alarm - NonLatching

This output is true whenever there is any
active non-latching shutdown diagnostic that
targets the Unit, Circuit, or any of the
Compressors on a circuit.

Alarm

This output is true whenever there is any
active latching or non-latching shutdown
diagnostic that targets the Unit, Circuit, or
any of the Compressors on a circuit.

Instant Close – Dependent Open

(a) Operation can be instant open or instant close, depending on diagnostic.

When going from Stop to Auto, the EWP relay is energized
immediately. If evaporator water flow is not established in
20 minutes (for normal transition) or 4 minutes, 15
seconds (for pump commanded ON due to an override
safety), the UC800 de-energizes the EWP relay and
generates a non-latching diagnostic. If flow returns (e.g.
someone else is controlling the pump), the diagnostic is
RTAE-SVX001B-EN

35

Installation Electrical
Table 19.

Alarm and status relay output configuration
table (continued)
Description

Alarm Ckt 1

This output is true whenever there is any
active latching or non-latching shutdown
diagnostic that targets Circuit 1, or any of the
Compressors on Circuit

Alarm Ckt 2

This output is true whenever there is any
active latching or non-latching shutdown
diagnostic that targets Circuit 2, or any of the
Compressors on Circuit 2.

Unit Limit Mode

This output is true whenever a circuit on the
unit has been running in one of the limit
modes continuously for the Limit Relay
debounce time. A given limit or overlapping of
different limits must be in effect continuously
for the debounce time prior to the output
becoming true. It will become false if no limits
are present for the debounce time.

Compressor Running

The output is true whenever any compressor
is running.

Circuit 1 Running

The output is true whenever any compressor
of Circuit 1 is running.

Circuit 2 Running

The output is true whenever any compressor
of Circuit 2 is running.

Maximum Capacity

The output is true whenever the unit has
reached maximum capacity continuously for
the Max Capacity Relay debounce time. The
output is false when the unit is not at
maximum capacity continuously for the filter
debounce time.

Head Pressure Relief
Request

This relay output is energized anytime the
chiller or a single circuit on the chiller is
running in one of the following modes; Ice
Making Mode, or Condenser Pressure Limit
continuously for the duration specified by the
Chiller Head Relief Relay Filter Time. The
Chiller Head Relief Relay Filter Time is a
service setpoint. The relay output is deenergized anytime the chiller exits all above
modes continuously for the duration specified
by the same Chiller Head Relief Relay Filter
Time

Relay Assignments Using
Tracer™ TU
Tracer™TU ServiceTool is used to install the
Programmable Relay Option package and assign any of
the above list of events or status to each of the four relays
provided with the option. (See “Tracer™TU,” p. 55 for
more information on theTracerTU service tool.)The
relays to be programmed are referred to by the relay’s
terminal numbers on the LLID board 1K13.
The default assignments for the four available relays of the
Programmable Relay option are:
Table 20.

Default assignments

Low Voltage Wiring
The remote devices described below require low voltage
wiring. All wiring to and from these remote input devices
to the Control Panel must be made with shielded, twisted
pair conductors. Be sure to ground the shielding only at
the panel.
Important: To prevent control malfunctions, do not run
low voltage wiring (<30 V) in conduit with
conductors carrying more than 30 volts.

Emergency Stop
UC800 provides auxiliary control for a customer specified/
installed latching trip out. When this customer-furnished
remote contact 5K35 is provided, the chiller will run
normally when the contact is closed. When the contact
opens, the unit will trip on a manually resettable
diagnostic.This condition requires manual reset at the
front of the control panel.
Connect low voltage leads to terminal strip locations on
1K2. Refer to the field diagrams that are shipped with the
unit.
Silver or gold-plated contacts are recommended.These
customer-furnished contacts must be compatible with 24
VDC, 12 mA resistive load.

External Auto/Stop
If the unit requires the external Auto/Stop function, the
installer must provide leads from the remote contacts
5K34 to the proper terminals of the LLID 1K2 on the control
panel.
The chiller will run normally when the contacts are closed.
When either contact opens, the compressor(s), if
operating, will go to the RUN:UNLOAD operating mode
and cycle off. Unit operation will be inhibited. Closure of
the contacts will permit the unit to return to normal
operation.
Field-supplied contacts for all low voltage connections
must be compatible with dry circuit 24 VDC for a 12 mA
resistive load. Refer to the field diagrams that are shipped
with the unit.

External Circuit Lockout – Circuit #1 and #2

Relay
Relay 0Terminals J2-1,2,3:

Unit Limit Mode

Relay 1Terminals J2-4,5,6:

Maximum Capacity

Relay 2Terminals J2 - 7,8,9:

Compressor Running

Relay 3Terminals J2 -10,11,12:

Alarm

36

If any of the Alarm/Status relays are used, provide
electrical power, 115 VAC with fused-disconnect to the
panel and wire through the appropriate relays (terminals
on 1K13 (EUR=A4-5)). Provide wiring (switched hot,
neutral, and ground connections) to the remote
annunciation devices. Do not use power from the chiller’s
control panel transformer to power these remote devices.
Refer to the field diagrams which are shipped with the unit.

UC800 provides auxiliary control of a customer specified
or installed contact closure, for individual operation of
either Circuit #1 or #2. If the contact is closed, the
refrigerant circuit will not operate 5K32 and 5K33.
RTAE-SVX001B-EN

Installation Electrical
Upon contact opening, the refrigerant circuit will run
normally.This feature is used to restrict total chiller
operation, e.g. during emergency generator operations.

In ice building, all limits (freeze avoidance, evaporator,
condenser, current) will be ignored. All safeties will be
enforced.

Connections to 1K3 are shown in the field diagrams that
are shipped with the unit.

If, while in ice building mode, the unit gets down to the
freeze stat setting (water or refrigerant), the unit will shut
down on a manually resettable diagnostic, just as in
normal operation.

These customer-supplied contact closures must be
compatible with 24 VDC, 12 mA resistive load. Silver or
gold plated contacts are recommended.

Ice Building Option
UC800 provides auxiliary control for a customer specified/
installed contact closure for ice building if so configured
and enabled.This output is known as the Ice Building
Status Relay.The normally open contact will be closed
when ice building is in progress and open when ice
building has been normally terminated either through Ice
Termination setpoint being reached or removal of the Ice
Building command.This output is for use with the ice
storage system equipment or controls (provided by
others) to signal the system changes required as the chiller
mode changes from “ice building” to “ice complete”.
When contact 5K36 is provided, the chiller will run
normally when the contact is open.
UC800 will accept either an isolated contact closure
(External Ice Building command) or a Remote
Communicated input (Tracer) to initiate and command the
Ice Building mode.
UC800 also provides a “Front Panel IceTermination
Setpoint”, settable throughTracer™TU, and adjustable
from 20 to 31°F (-6.7 to -0.5°C) in at least 1°F (1°C)
increments.
Note: When in the Ice Building mode, and the evaporator
entering water temperature drops below the ice
termination setpoint, the chiller terminates the Ice
Building mode and changes to the Ice Building
Complete Mode.

NOTICE:
Equipment Damage!
Freeze inhibitor must be adequate for the leaving water
temperature. Failure to do so will result in damage to
system components.
Tracer™TU must also be used to enable or disable Ice
Machine Control.This setting does not prevent theTracer
from commanding Ice Building mode.
Upon contact closure, the UC800 will initiate an ice
building mode, in which the unit runs fully loaded at all
times. Ice building shall be terminated either by opening
the contact or based on the entering evaporator water
temperature. UC800 will not permit the ice building mode
to be reentered until the unit has been switched out of ice
building mode (open 5K36 contacts) and then switched
back into ice building mode (close 5K36 contacts.)

RTAE-SVX001B-EN

Connect leads from 5K36 to the proper terminals of 1K8.
Refer to the field diagrams which are shipped with the unit.
Silver or gold-plated contacts are recommended.These
customer furnished contacts must be compatible with 24
VDC, 12 mA resistive load.

External Chilled Water Setpoint (ECWS)
Option
The UC800 provides inputs that accept either 4-20 mA or
2-10 VDC signals to set the external chilled water setpoint
(ECWS).This is not a reset function.The input defines the
setpoint.This input is primarily used with generic BAS
(building automation systems).The chilled water setpoint
set via theTracer AdaptiView™TD7 or through digital
communication withTracer (Comm3).The arbitration of
the various chilled water setpoint sources is described in
the flow charts at the end of the section.
The chilled water setpoint may be changed from a remote
location by sending either a 2-10 VDC or 4-20 mA signal to
the 1K14, terminals 5 and 6 LLID. 2-10 VDC and 4-20 mA
each correspond to a 10 to 65°F (-12 to 18°C) external
chilled water setpoint.
The following equations apply:
Voltage Signal
As generated from external source

VDC=0.1455*(ECWS) + 0.5454

As processed by UC800

ECWS=6.875*(VDC) - 3.75

Current Signal
As generated from external source

mA=0.2909(ECWS) + 1.0909

As processed by UC800

ECWS=3.4375(mA) - 3.75

If the ECWS input develops an open or short, the LLID will
report either a very high or very low value back to the main
processor.This will generate an informational diagnostic
and the unit will default to using the Front Panel (TD7)
Chilled Water Setpoint.
TracerTU ServiceTool is used to set the input signal type
from the factory default of 2-10 VDC to that of 4-20 mA.
TracerTU is also used to install or remove the External
ChilledWater Setpoint option as well as a means to enable
and disable ECWS.

External Demand Limit Setpoint (EDLS)
Option
Similar to the above, the UC800 also provides for an
optional External Demand Limit Setpoint that will accept
either a 2-10 VDC (default) or a 4-20 mA signal.The
Demand Limit Setting can also be set via theTracer
AdaptiView™TD7 or through digital communication with
37

Installation Electrical
Tracer (Comm 3).The arbitration of the various sources of
demand limit is described in the flow charts at the end of
this section.The External Demand Limit Setpoint may be
changed from a remote location by hooking up the analog
input signal to the 1K14 LLID terminals 2 and 3. Refer to the
following paragraph on Analog Input Signal Wiring
Details.The following equations apply for EDLS:
Voltage Signal

Current Signal

As generated from
external source

VDC+0.133*(%)-6.0

mA=0.266*(%)-12.0

As processed by
UCM

%=7.5*(VDC)+45.0

%=3.75*(mA)+45.0

Figure 25. Wiring examples for EDLS and ECWS
J2-1 & 4 Dual
J2-2 & 5 Analog
J2-3 & 6 I/O LLID

2-10 VDC, 4-20mA

Resister
I
I = 20/(R + 200)

If the EDLS input develops an open or short, the LLID will
report either a very high or very low value back to the man
processor.This will generate an informational diagnostic
and the unit will default to using the Front Panel (Tracer
AdaptiView™TD7) Current Limit Setpoint.
TheTracer™TU ServiceTool must be used to set the input
signal type from the factory default of 2-10 VDC to that of
4-20 mA current.TracerTU must also be used to install or
remove the External Demand Limit Setpoint Option for
field installation, or can be used to enable or disable the
feature (if installed).

EDLS and ECWS Analog Input Signal Wiring
Details:
Both the ECWS and EDLS can be connected and setup as
either a 2-10 VDC (factory default), 4-20 mA, or resistance
input (also a form of 4-2OmA) as indicated below.
Depending on the type to be used, theTracerTU Service
Tool must be used to configure the LLID and the MP for the
proper input type that is being used.This is accomplished
by a setting change on the CustomTab of the
Configuration View withinTracerTU.
Important:

For proper unit operation, BOTH the EDLS
and ECWS settings MUST be the same (2-10
VDC or 4-20mA), even if only one input is to
be used.

The J2-3 and J2-6 terminal is chassis grounded and
terminal J2- 1 and J2-4 can be used to source 12 VDC.The
ECLS uses terminals J2-2 and J2-3. ECWS uses terminals
J2-5 and J2-6. Both inputs are only compatible with
high-side current sources.

J2-1 & 4 Dual
J2-2 & 5 Analog
J2-3 & 6 I/O LLID

J2-1 & 4 Dual
J2-2 & 5 Analog
J2-3 & 6 I/O LLID

Chilled Water Reset (CWR)
UC800 resets the chilled water temperature set point
based on either return water temperature, or outdoor air
temperature. Return Reset is standard, Outdoor Reset is
optional.
The following shall be selectable:
•

•

One of three ResetTypes: None, Return Water
Temperature Reset, Outdoor AirTemperature Reset, or
Constant Return WaterTemperature Reset.
Reset Ratio Set Points.
For outdoor air temperature reset there shall be both
positive and negative reset ratio's.

•

Start Reset Set Points.

•

Maximum Reset Set Points.

The equations for each type of reset are as follows:
Return
CWS' = CWS + RATIO (START RESET - (TWE -TWL))
and CWS' > or = CWS
and CWS' - CWS < or = Maximum Reset
Outdoor
CWS' = CWS + RATIO * (START RESET -TOD)
and CWS' > or = CWS
and CWS' - CWS < or = Maximum Reset
where
CWS' is the new chilled water set point or the "reset CWS"
CWS is the active chilled water set point before any reset
has occurred, e.g. normally Front Panel,Tracer, or ECWS
RESET RATIO is a user adjustable gain
START RESET is a user adjustable reference
TOD is the outdoor temperature
TWE is entering evap. water temperature

38

RTAE-SVX001B-EN

Installation Electrical
TWL is leaving evap. water temperature
MAXIMUM RESET is a user adjustable limit providing the
maximum amount of reset. For all types of reset, CWS' CWS < or = Maximum Reset.

Range
Reset
Type
Return

Increment

Reset
Ratio
10 to
120%

Start
Reset

IP
Units

4 to 30 F 0 to 20 F 1%
(2.2 to
16.7 C)

80 to Outdoor
80%

Max
Reset

1%

Factory
Default
50%

(0.0 to
11.1 C)

50 to 130
0 to 20 F 1%
F
(10 to
54.4 C)

SI
Units

Communications Interface
LonTalk Interface (LCI-C)
UC800 provides an optional LonTalk™ Communication
Interface (LCI-C) between the chiller and a Building
Automation System (BAS). An LCI-C LLID shall be used to
provide "gateway" functionality between a LonTalk
compatible device and the Chiller.The inputs/outputs
include both mandatory and optional network variables as
established by the LonMark Functional Chiller Profile 8040.
Note: For more information see ACC-SVN100*-EN.

1%

10%

(0.0 to
11.1 C)

In addition to Return and Outdoor Reset, the MP provides
a menu item for the operator to select a Constant Return
Reset. Constant Return Reset will reset the leaving water
temperature set point so as to provide a constant entering
water temperature.The Constant Return Reset equation is
the same as the Return Reset equation except on selection
of Constant Return Reset, the MP will automatically set
Ratio, Start Reset, and Maximum Reset to the following.
RATIO = 100%
START RESET = Design DeltaTemp.
MAXIMUM RESET = Design DeltaTemp.

BACnet Interface (BCI-C)
Optional BACnet™ Communication Interface for Chillers
(BCI-C) is comprised of aTracer UC800 controller with
interface software. It is a non-programmable
communications module that allows units to
communicate on a BACnet communications network.
Note: For more information, see BAS-SVP01*-EN.

Modbus Remote Terminal Unit Interface
Modicon Communication Bus (Modbus™) enables the
chiller controller to communicate as a slave device on a
Modbus network. Chiller setpoints, operating modes,
alarms and status can be monitored and controlled by a
Modbus master device.
Note: For more information, see BAS-SVP01*-EN.

The equation for Constant Return is then as follows:
CWS' = CWS + 100% (Design DeltaTemp. - (TWE -TWL))
and CWS' > or = CWS
and CWS' - CWS < or = Maximum Reset
When any type of CWR is enabled, the MP will step the
Active CWS toward the desired CWS' (based on the above
equations and setup parameters) at a rate of 1 degree F
every 5 minutes until the Active CWS equals the desired
CWS'.This applies when the chiller is running.
When the chiller is not running, CWS is reset immediately
(within one minute) for Return Reset and at a rate of 1
degree F every 5 minutes for Outdoor Reset.The chiller
will start at the Differential to Start value above a fully reset
CWS or CWS' for both Return and Outdoor Reset.

Transformer Power Rating
See table below for power rating of optional transformer
(unit model number digit 28 = 1).
Table 21. Transformer power ratings
Unit Size

Power Rating

150 - 200 tons

340 kVA

225-300 tons

470 kVA

RTAE-SVX001B-EN

39

Operating Principals
This section contains an overview of the operation and
maintenance of Stealth RTAE units equipped with UC800
control systems. It describes the overall operating
principles of the RTAE design.

cooled heat exchanger where refrigerant is condensed in
the tube (states 2b to 3b). Refrigerant flow through the
system is balanced by an electronic expansion valve
(states 3b to 4).

Refrigeration Circuits

Refrigerant R-134a

Each unit has two refrigerant circuits, with one rotary
screw compressor per circuit. Each refrigerant circuit
includes a compressor suction and discharge service
valve, liquid line shutoff valve, removable core filter, liquid
line sight glass with moisture indicator, charging port and
an electronic expansion valve. Fully modulating
compressors and electronic expansion valves provide
variable capacity modulation over the entire operating
range. Lower condensing temperatures and higher
suction temperatures along with more efficient
compressors and fans result in the premium efficiency
level of Stealth Air Cooled chillers

The RTAE chiller uses environmentally friendly R-134a.
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified.The Federal Clean Air Act
(Section 608) sets forth the requirements for handling,
reclaiming, recovering and recycling of certain
refrigerants and the equipment that is used in these
service procedures. In addition, some states or
municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.

Refrigeration Cycle
The refrigeration cycle of the RTAE chiller is represented in
the pressure enthalpy diagram shown in Figure 26. Key
state points are indicated on the figure.The cycle for the
full load AHRI design point is represented in the plot.
Figure 26. Pressure enthalpy (P-h) diagram - RTAE

R-134a is a medium pressure refrigerant. It may not be
used in any condition that would cause the chiller to
operate in a vacuum without a purge system. RTAE is not
equipped with a purge system.Therefore, the RTAE chiller
may not be operated in a condition that would result in a
saturated condition in the chiller of –15°F (-26°C) or lower.
R-134a requires the use of specific POE oils as designated
on the unit nameplate.
Important:

R-134a

600

Use only R-134a andTrane Oil 00311 (bulk)/
00315 (1gal)/00317 (5gal) in Stealth chillers.

500

Compressor and Lube Oil System
2
3

2b

3b

P (psia)

200

100

4

1

50

1b

30
0

20

40

60

80

100

120

140

h (btu/lb)

The RTAE chiller uses a shell and tube evaporator design
with refrigerant evaporating on the shell side and water
flowing inside tubes having enhanced surfaces (states 4 to
1).The suction lines are designed to minimize pressure
drop.(states 1 to 1b).The compressor is a twin-rotor helical
rotary compressor designed similarly to the compressors
offered in otherTrane Screw Compressor Based Chillers
(states 1b to 2).The discharge lines include a highly
efficient oil separation system that removes 99.8% of the
oil from the refrigerant stream going to the heat
exchangers (states 2 to 2b). De-superheating, condensing
and sub-cooling is accomplished in a fin and tube air
40

The rotary screw compressor is semi-hermetic, direct
drive with capacity control via a variable speed drive,
rolling element bearings, differential refrigerant pressure
oil pump and oil heater.The motor is a suction gas cooled,
hermetically sealed, permanent magnet motor. An oil
separator is provided separately from the compressor. Oil
filtration is provided internal to the compressor. Check
valves in the compressor discharge and lube oil system
are also provided.

Condenser and Fans
Air-cooled condenser coils have aluminum fins
mechanically bonded to internally finned seamless
aluminum tubing.The tubing is a long life alloy designed
to deliver corrosion performance that meets or exceeds
microchannel coils.The condenser coil has an integral
subcooling circuit. Condensers are factory proof tested at
525 psig and leak tested with helium in a mass
spectrometer chamber at 150 psig. All tube connections
are mechanical except the brazed copper to aluminum
inlet and outlet connections. Condenser fans are directdrive vertical discharge.The condenser fan motors are
permanent magnet motors with an integrated drive to
RTAE-SVX001B-EN

Operating Principals
provide variable speed fan control for all fans and are
designed with permanently lubricated ball bearings,
internal temperature and current overload protection, and
fault feedback as a standard product offering. The fan
impeller is a nine bladed-shrouded fan made from heavyduty molded plastic. Standard units will start and operate
between 32 to 105°F (0 to 40°C) ambient.
The UC800 controls calculate optimum fan speed for
maximum efficiency based on compressor load and
outdoor air, resulting in high IPLV values.

Evaporator
The evaporator is a tube-in-shell heat exchanger design
constructed from carbon steel shells and tubesheets with
internally and externally finned seamless copper tubes
mechanically expanded into the tube sheets.The
evaporator is designed, tested and stamped in accordance
with the ASME Boiler and Pressure Vessel Code for a
refrigerant side working pressure of 200 psig.The
evaporator is designed for a water side working pressure
of 150 psig. Standard water connections are grooved for
Victaulic style pipe couplings, with flange style
connections optionally available. Waterboxes are
available in 2 and 3 pass configurations and include a vent,
a drain and fittings for temperature control sensors.
Evaporators are insulated with 3/4 inch closed cell
insulation. Evaporator water heaters with thermostat are
provided to help protect the evaporator from freezing at
ambient temperatures down to -20°F (-29°C). A factory
installed flow switch is installed on the supply water box in
the evaporator inlet connection.

Drive Cooling System
Each refrigeration circuit has a compressor drive cooling
circuit. Each drive cooling circuit includes a wet rotor
circulation pump that circulates a secondary heat transfer
fluid in a closed system between the adaptive frequency
drive components between the heat sinks of the adaptive
frequency drive and a brazed plate heat exchanger.The
pump is fed from a thermal expansion tank with a ventedpressure cap which is also used as the circuit pressure
relief.The circuit also includes a particulate strainer and a
drain valve for servicing.

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Overview

UC800 Specifications

Stealth™ RTAE units utilize the following control/interface
components:

This section covers information pertaining to the UC800
controller hardware.

•

Tracer™ UC800 Controller

•

Tracer AdaptiView™TD7 Operator Interface

Wiring and Port Descriptions
Figure 27 illustrates the UC800 controller ports, LEDs,
rotary switches, and wiring terminals.The numbered list
following Figure 27 corresponds to the numbered callouts
in the illustration.

Figure 27.

Wiring locations and connection ports

+

+

LINK

2

3

4

+

+24
VDC

MBUS

5

6

6

7
8

9

1

10
10

11

11
Front View
1.

Rotary Switches for setting BACnet® MAC address or MODBUS ID.

2.

LINK for BACnet MS/TP, or MODBUS Slave (two terminals, ±). Field wired if used.

3.

LINK for BACnet MS/TP, or MODBUS Slave (two terminals, ±). Field wired if used.

Bottom View

4.

Machine bus for existing machine LLIDs (IPC3Tracer bus 19.200 baud). IPC3 Bus: used for Comm4 usingTCI or LonTalk® using LCI-C.

5.

Power (210 mA at 24 Vdc) and ground terminations (same bus as item 4). Factory wired.

6.

Not used.

7.

Marquee LED power and UC800 Status indicator (Table 22, p. 43).

8.

Status LEDs for the BAS link, MBus link, and IMC link.

9.

USB device type B connection for the service tool (TracerTU).

10. The Ethernet connection can only be used with theTracer AdaptiView display.
11. USB Host (not used).

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Communication Interfaces
There are four connections on the UC800 that support the
communication interfaces listed. See Figure 27, p. 42 for
the locations of each of these ports.
• BACnet® MS/TP
• MODBUS™ Slave
• LonTalk™ using LCI-C (from the IPC3 bus)
• Comm 4 usingTCI (from the IPC3 bus)

Table 22.

LED behavior

LED

Low power or malfunction. If the Marquee LED is
Marquee LED red solid, the UC800 is powered, but there are
problems present.
Alarm. The Marquee LED blinks Red when an alarm
exists.

Rotary Switches
There are three rotary switches on the front of the UC800
controller. Use these switches to define a three-digit
address when the UC800 is installed in a BACnet or
MODBUS system (e.g., 107, 127, etc.).
Note: Valid addresses are 001 to 127 for BACnet and 001
to 247 for MODBUS.

LED Description and Operation

LINK, MBUS,
IMC

The TX LED blinks green at the data transfer rate
when the UC800 transfers data to other devices on
the link.
The Rx LED blinks yellow at the data transfer rate
when the UC800 receives data from other devices on
the link.

Ethernet Link

The LINK LED is solid green if the Ethernet link is
connected and communicating.
The ACT LED blinks yellow at the data transfer rate
when data flow is active on the link.

Service

There are 10 LEDs on the front of the UC800. Figure 28
shows the locations of each LED and Table 22 describes
their behavior in specific instances.
Figure 28. LED locations

UC800 Status
Powered. If the Marquee LED is green solid, the
UC800 is powered and no problems exist.

The Service LED is solid green when pressed. For
qualified service technicians only. Do not use.

NOTICE:
Electrical Noise!

Marquee
LINK

MBUS

IMC

TX
RX

Tracer AdaptiView TD7 Display

LINK
SERVICE

ACT

Maintain at least 6 inches between low-voltage (<30V)
and high voltage circuits. Failure to do so could result i
electrical noise that could distort the signals carried by
the low-voltage wiring, including IPC.

Operator Interface
Information is tailored to operators, service technicians,
and owners. When operating a chiller, there is specific
information you need on a day-to-day basis—setpoints,
limits, diagnostic information, and reports. Day-to-day
operational information is presented at the display.
Logically organized groups of information— chiller modes
of operation, active diagnostics, settings and reports put
information conveniently at your fingertips.

Figure 29. TD7 screens

Operator Display Boot Screen

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Display Loading Data

Home Screen, Auto Mode

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Main Display Area/Home Screen

Viewing Chiller Operating Modes

All screens appear within the main display area (shown as
location in Table 30).

On the Reports screen, touch Chiller Operating Modes to
view the current operating status of the chiller in terms of
the top-level operating mode and submodes.

Home screen: Chiller status information
The home screen (Table 30) provides the most frequently
needed chiller status information on “touch targets” (the
entire white rectangular areas) for each chiller component.
Touching any touch target displays a screen containing
more chiller status information related to each
component.

Note: You can also access the Chiller Operating Modes
screen from the chiller status button in the upper
left corner of the screen.
Figure 31.

Chiller operating modes

Figure 30. Main screen

Table 23.

Main screen items

Description

Resolution

Units

Active Chilled Water Setpoint

X.X

°F /°C

Active Current Limit Setpoint

X.X

%RLA

Average Motor Current %RLA

X.X

%RLA

Evap Entering/Leaving Water Temp

X.X

°F /°C

Cond Entering/Leaving Water Temp

X.X

°F /°C

Frequency Command

X.X

Hz

Evaporator Water Flow Status

X.X

Condenser Water Flow Status

Table 24.

Operating modes

Chiller Modes

Description

MP Resetting

Stopped

The chiller is not running and cannot run without intervention. Further information is provided
by the sub-mode:

Local Stop

Chiller is stopped by TD7 Stop button command– cannot be remotely overridden.

Immediate Stop

Chiller is stopped by the TD7 Panic Stop (by pressing Stop button twice in succession) – previous shutdown
was manually commanded to shutdown immediately without a run-unload or pumpdown cycle - cannot
be remotely overridden.

Diagnostic Shutdown – Manual Reset The chiller is stopped by a diagnostic that requires manual intervention to reset.
Run Inhibit

The chiller is currently being inhibited from starting (and running*), but may be allowed to start
if the inhibiting or diagnostic condition is cleared. Further information is provided by the submode:

Diagnostic Shutdown – Auto Reset

The entire chiller is stopped by a diagnostic that may automatically clear.

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Table 24.

Operating modes (continued)

Chiller Modes

Description

Starting is Inhibited by External
Source

The chiller is inhibited from starting (and running) by the “external stop” hardwired input.

Start Inhibited by BAS

The chiller is inhibited from starting (and running) by command from a Building Automation System via
the digital communication link (com 4 or com 5).

Waiting for BAS Communications

This is a transient mode - 15-min. max, and is only possible if the chiller is in the Auto - Remote command
mode. After a power up reset, it is necessary to wait for valid communication from a Building Automation
System (Tracer) to know whether to run or stay inhibited. Either valid communication will be received from
the Building Automation System (e.g. Tracer), or a communication diagnostic ultimately will result. In the
latter case the chiller will revert to Local control.

Power Up Delay Inhibit

The compressor is currently being inhibited from starting as part of the power up start delay (or staggered
min:sec start) feature. This feature is intended to prevent multiple chillers from all starting simultaneously if power
is restored to all chillers simultaneously.

Low Differential Refrigerant Pressure
Contact your local Trane service office.
Cool-Down Timemin:sec
Auto

The chiller is not currently running but can be expected to start at any moment given that the
proper conditions and interlocks are satisfied. Further information is provided by the submode:

Waiting For Evap Water Flow

The chiller will wait up to 20 minutes in this mode for evaporator water flow to be established per the flow
switch hardwired input.

Waiting for A Need to Cool

The chiller will wait indefinitely in this mode, for an evaporator leaving water temperature higher than the
Chilled Water Setpoint plus the Differential to Start.

Waiting to Start

The chiller is not currently running and there is a call for cooling but start is delayed by certain
interlocks or proofs. Further information is provided by the sub-mode:

Waiting For Cond Water Flow

The chiller will wait up to 20 minutes in this mode for condenser water flow to be established per the flow
switch hardwired input.

Start Inhibited Waiting for Oil

The chiller will wait up to 2 minutes in this mode for oil level to appear in the oil tank.

Condenser Water Pump Pre-Run
Timemin:sec

The chiller will wait up to 30 minutes (user adjustable) in this mode for to allow the condenser water loop
to equalize in temperature

Restart Inhibit min:sec

The compressor is currently unable to start due to its restart inhibit timer. A given compressor is not
allowed to start until 5 minutes (adj) has expired since its last start, once a number of “free starts” have
been used up.

Waiting For EXV Preposition

The Chiller will wait for the time it takes the EXV to get to its commanded pre-position prior to starting
the compressor. This is typically a relatively short delay and no countdown timer is necessary (less than
15 seconds)

Minimum Condenser Watermin:sec

Only possible when Condenser Head Pressure Control option is enabled, this wait may be necessary due
to the Head Pressure control device’s stroke time.

Condenser Water Regulating Control
min:sec

Only possible when Condenser Head Pressure Control option is enabled, this wait may be necessary due
to the Head Pressure control device’s stroke time

Running

The chiller, circuit, and compressor are currently running. Further information is provided by
the sub-mode:

High Discharge Temp Limit

The compressor is running and is being forced loaded to its step load point, without regard to the leaving
water temperature control, to prevent tripping on high compressor discharge temperature.

Base Loaded

Chiller is running in “Base Load” operation where the capacity of the chiller is controlled to maintain a given
current per an adjustable set point. The chiller is forced to run without regard to the chilled water
temperatures and the differential to start and stop

Capacity Control Softloading

The chiller is running, but loading is influenced by a gradual ‘pulldown” filter on the chilled water
temperature setpoint. The settling time of this filter is user adjustable as part of the softload control
feature.

Current Control Softloading

The chiller is running, but loading is influenced by a gradual filter on the current limit setpoint The starting
current and the settling time of this filter is user adjustable as part of the softload control feature.

EXV Controlling Differential Pressure

Liquid level control of the Electronic Expansion Valve has temporarily been suspended. The EXV is being
modulated to control for a minimum differential pressure. This control implies low liquid levels and higher
approach temperatures, but is necessary to provide minimum oil flow for the compressor until the
condenser water loop can warm up to approx 50F.

Chilled Water Control

Unit is running in the Cooling Mode of operation and is attempting to control to the active Chilled Water
Setpoint.

Running – Limited

The chiller, circuit, and compressor are currently running, but the operation of the chiller/
compressor is being actively limited by the controls. Further information is provided by the submode.* See the section below regarding criteria for annunciation of limit modes

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Table 24.

Operating modes (continued)

Chiller Modes

Description

Condenser Pressure Limit

The circuit is experiencing condenser pressures at or near the condenser limit setting. Compressors on the
circuit will be unloaded to prevent exceeding the limits.*

Low Evaporator Refrigerant
Temperature Inhibit

The circuit is experiencing saturated evaporator temperatures at or near the Low Refrigerant Temperature
Cutout setting. Compressors on the circuit will be unloaded to prevent tripping. *

Capacity Limited by Low Liquid Level

The circuit is experiencing low refrigerant liquid levels and the EXV is at or near full open. The compressors
on the circuit will be unloaded to prevent tripping.*

Current Limit

The compressor is running and its capacity is being limited by high currents. The current limit setting is
100% RLA (to avoid overcurrent trips) or lower as set by the compressor’s “share” of the active current
limit (demand limit) setting for the entire chiller.*

Phase Unbalance Limit

The compressor is running and its capacity is being limited by excessive phase current unbalance.*

Low Discharge Superheat Limit

This is limit control that acts to prevent chiller shutdown when the discharge superheat approaches the
limit setpoint by reducing the liquid level and unloading the slide valve.

Oil Loss Avoidance

This is limit control that acts to prevent chiller shutdown when the estimated refrigerant flow approaches
the calculated minimum flow by increasing the slide valve capacity and/or VFD frequency

Note: Other normal running modes (see above) may also appear under this top level mode

Shutting Down

The chiller is still running but shutdown is imminent. The chiller is going through a compressor
run-unload. sequence. Shutdown is necessary due to one (or more) of the following sub-modes:

Local Stop

Chiller is in the process of being stopped by TD7 Stop button command

immediate Stop

Chiller is in the process of being stopped by TD7 Panic Stop command

Chiller is in the process of being stopped by a Latching Diagnostic shutdown – Manual Reset is required
Diagnostic Shutdown – Manual Reset
to clear
Diagnostic Shutdown – Auto Reset

Chiller is in the process of being stopped by a Diagnostic shutdown – Automatic clearing of the diagnostic
is possible if condition clears.

Compressor Unloading (min:sec)

The compressor is in its “run – unload” state in which it is being continuously unloaded for 40 sec prior
to shutdown.

Starting is Inhibited by External
Source

Chiller is in the process of being stopped by the External Stop hardwired input

Start Inhibited by BAS

The Chiller is in the process of shutdown due to a command from the Building Automation System (e.g.
Tracer)

Evaporator Water Pump Off Delay
min:sec
Service Override

The Chiller is in a Service Override mode

Service Pumpdown

The chiller, circuit, and compressor is running via a manual command to perform a Service Pumpdown.
Both evap and condenser water pumps are commanded to be running. The EXV is being held wide open,
but the manual liquid line service valve should be closed.

Alarms
You can use the display to view alarms and to reset them.
Alarms are communicated to the display immediately
upon detection.

Figure 32. Alarm screen

Viewing the Alarms Screen
Touch the Alarms button in the main menu area (Figure 30,
p. 44) to view the Alarms screen. A table of active alarms
appears that is organized chronologically with the most
recent at the top of the list, as shown in Figure 32.This
example shows the default view, which appears each time
you return to the screen.
Note: A page number appears in the lower right corner of
the screen. If a screen contains more than one
page, up/down arrows also appear for viewing the
other pages

The Alarms screen is accessible by depressing the Alarms
enunciator. A verbal description will be provided.
A scrollable list of the last active Alarms is presented.
Performing a “Reset Alarms” will reset all active Alarms

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regardless of type, machine or circuit.The scrollable list
will be sorted by time of occurrence.
If a informational warning is present, the “Alarms” key will
be present but not flashing. If a Alarm shutdown (normal
or immediate) has occurred, the “Alarm” key will display
that is flashing. If no Alarms exist, the “Alarm” key will not
be present.

Reports
You can use theTracer display to view a variety of reports
and to create and edit a custom report. All reports contain
live data that refreshes every 2–5 seconds.

Viewing the Reports Screen
Touch the Reports button in the main menu area (Figure 4)
to view the Reports screen.The Reports screen contains
the following buttons:
•

Custom Report1

•

Custom Report2

•

Custom Report3

•

Evaporator

•

Condenser

•

Compressor

•

Motor

•

About

•

Operating Modes

•

Log Sheet

•

ASHRAE Chiller Log

Editing a Custom Report
You can edit the custom report by adding, removing, or reorder data as follows:
1. On the Custom Report screen, touch Edit.The Edit
Custom Report screen appears.
2. Add, remove, or re-order as follows:
a. To add an item to the custom report, touch it. It
responds by changing to blue.You can use the
arrows to scroll through the rest of the items that
can be added to the custom report.Then touch Add
to move the selected item to the box on the right
side of the screen.To add all of the remaining items
in the left box to the custom report, touch Add All.
b. To remove an item from the custom report, touch it.
It responds by changing to blue.You can use the
arrows to scroll through the rest of the items that
can be removed from the custom report.Then touch
Remove to move the selected item to the box on the
left side of the screen.
c. To re-order items in the custom report, touch it. It
responds by changing to blue. Use the arrows to
change the order of a highlighted item.
3. To save and view your edited custom report, touch
Save.
Figure 34. Edit custom report screen

Each button links to the report named on the button.
Figure 33. Report screen

Figure 35. Report evaporator screen

The Reports tab allows a user to select from a list of reports
headings. Each report will generate a list of status items as
defined in the tables that follow.

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Table 25.

Report evaporator screen items

Figure 37.

Description

Resolution

Units

Active Chilled Water Setpoint

X.X

°F / °C

Evaporator Entering Water Temperature X.X

°F / °C

Evaporator Leaving Water Temperature X.X

°F / °C

Evaporator Water Flow Status

Flow, No Flow

Text

Evaporator Water Pump Override

Auto, On

Text

Evaporator Approach Temperature

X.X

°F / °C

EXV Position Percent

X.X

%

Evaporator Refrigerant Pressure

XXX.X

PSIA/kPa

Evaporator Saturated Rfgt Temp

X.X

°F / °C

Evaporator Refrigerant Liquid Level

X.XX

in/mm

Figure 36. Report condenser screen

Table 26.

Table 27.

Report condenser screen items

Description

Resolution

Condenser Entering Water
Temperature

X.X

Condenser Leaving Water
Temperature

Description

Resolution

Units

Compressor Running Status

On,Off

Text

Average Motor Current %RLA

XX.X%

%RLA

Compressor Starts

XX

Text

Compressor Running Time

XX:XX

Hr:Min

Oil Loss Level Sensor

Wet, Dry

Text

Discharge Temperature

X.X

°F / °C

Discharge Temperature

X.X

°F / °C

Compressor Oil Pressure

XXX.X

PSIA/kPaA

Evaporator Refrigerant Pressure

XXX.X

PSIA/kPaA

Condenser Refrigerant Pressure

XXX.X

PSIA/kPaA

Differential Refrigerant Pressure

XXX.X

PSIA/kPaA

Frequency Command

XX.X

Hz

Figure 38. Report motor screen
X.X

F/C
F/C

Flow, No Flow

Text

Condenser Water Pump Override

Auto, On

Text

X.X

F/C

EXV Position Percent

X.X

%

Condenser Refrigerant Pressure

XXX.X

PSIA/kPa

Condenser Saturated Rfgt Temp

X.X

F/C

Differential Refrigerant Pressure

XXX.X

PSIA/kPa

Outdoor Air Temperature

X.X

F/C

48

Report compressor screen items

Units

Condenser Water Flow Status

Condenser Approach Temperature

Report compressor screen

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Viewing and Changing Equipment Settings
Table 28.

Report motor screen items

Description

Resolution

Units

Active Current Limit Setpoint

X.X

%RLA

Average Motor Current %RLA

X.X

%RLA

Starter Motor Current L1 %RLA

X.X

%RLA

Starter Motor Current L2 %RLA

X.X

%RLA

Starter Motor Current L3 %RLA

X.X

%RLA

Starter Motor Current L1

X.X

A

Starter Motor Current L1

X.X

A

Starter Motor Current L1

X.X

A

Starter Input Voltage AB

XXX.X

V

Starter Input Voltage BC

XXX.X

V

Starter Input Voltage CA

XXX.X

V

Average Motor Current

X.X

A

Average Phase Voltage

XXX.X

V

Frequency Command

XX.X

Hz

Each button in the Equipment Settings column on the
Settings screen takes you to a menu screen that contains
a group of buttons. Each button displays the name of a
setting and its current value (Figure 40).Touch any button
to view a screen where you can change the setting for the
feature shown on the button.
Note: A page number appears in the lower right corner of
the screen. If a screen contains more than one
page, up/down arrows also appear for viewing the
other pages, as in Figure 40.
Figure 40. Equipment setting screen
(Chiller setting shown)

Equipment Settings
You can use the TD7 display to monitor and change a
variety of equipment settings.

Viewing the Settings Screen
Touch the Settings button in the main menu area (see
Figure 30, p. 44) to view the Settings screen. Equipment
Settings identifies a column of buttons located on the
screen (see the outlined column in Figure 39).The buttons
are:
•

Chiller Settings

•

Feature Settings

•

Chiller Water Reset

•

Manual Control Settings

Each of these buttons provide access to a screen that
contains additional buttons related to each topic.This
section provides detailed information about these
screens.
Figure 39. Setting screen

To change an equipment setting, follow this procedure:
1. Touch one of the button in the Equipment Settings
column on the Settings screen, such as Chiller Settings.
The corresponding screen appears (in this case, the
Chiller Settings screen).
2. Touch the button that shows the equipment setting you
want to change. A screen that allows you to change the
equipment setting appears.There are two types of
these screens:
a. For screens with button selections (Figure 41),
touch the button that represents the setting you
want.The button becomes shaded, and a Save
button appears at the bottom of the screen.
b. For screens with numerical keypads (Figure 42),
touch the appropriate numbers to change the
current value.The new value appears above the
keypad.
3. Touch Save to complete the change.The current value
is updated in the upper left side of the screen,
demonstrating that the change has been
communicated to theTracer UC800 controller.The
screen you were previously viewing appears.

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Figure 41.

Chilled water setpoint screen

Table 29.

Settings screen items

Description

Resolution

Units

± XXX.X

°F / °C

Active Current Limit Setpoint

XXX %

%RLA

Active Panel Base Load Cmd

On/Auto

Text

Active Base Loading Setpoint

XXX

%

Active Base Loading Command

On/Auto

Text

Differential to Start

XXX.X

°F / °C

Differential to Stop

XXX.X

°F / °C

Chiller Settings
Active Chilled Water Setpoint

Figure 42. Changed chilled water setpoint screen

Setpoint Source
BAS/Ext/FP
(BAS/Ext/FP, Ext/Front Panel, Front Panel)

Text

Evaporator Water Pump Off Delay

Min

XX

Condenser Pump Prestart Time

XX

Min

High Evap Water Temp Cutout

XXX.X

°F / °C

Evaporator Leaving Water Temp Cutout

XX.X

°F / °C

Low Refrigerant Temperature Cutout

XX.X

°F / °C

Current Limit Softload Start Point

XXX.X

%

Current Limit Control Softload Time

XXXX

Sec

Capacity Control Softload Time

XXXX

Sec

Local Atmospheric Pressure

XXX.X

psi/kPa

Power Up Start Delay

XXX

Min

Feature Settings

Keypad features:
•

When you enter a new number, the value in the New
value field is deleted and replaced with the new entry.

•

The backspace (arrow) key deletes the characters you
previously entered.

•

•

If the keypad is used to enter a setpoint that is out of
range, an error dialog will appear when you touch the
Save button.
Keypads that allow negative numbers have positive
and negative number (+/-) keys.

External Chilled/Hot Water Setpoint
(Enable/Disable)

Text

External Current Limit Setpoint
(Enable/Disable)

Text

LCI-C Diagnostic Encoding (Enable/Disable)

Text

Chilled Water Reset
(Constant, Outdoor, Return, Disable),

Disable

Text

Return Reset Ratio

XXX

%

Return Start Reset

XXX.X

°F / °C

Return Maximum Reset

XXX.X

°F / °C

Outdoor Reset Ratio

XXX

%

Outdoor Start Reset

XXX.X

°F / °C

Outdoor Maximum Reset

XXX.X

°F / °C

Evap Water Pump (Auto, On)

Auto

Text

Cond Water Pump (Auto, On)

Auto

Text

Mode Overrides

Display Reference
Date Format
(mmm dd, yyyy, dd-mmm-yyyy)

mmm dd, yyyy Text

Data Separator
12-hour

Text

Unit System (SI, English)

English

Text

Pressure Units (Absolute, Gauge)

Absolute

Number Format

50

Text

Time Format (12-hour, 24-hour)

Text
Text

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Display Settings
You can use theTracer AdaptiView display to change the
format of the information that appears on the display, and
to clean the touch screen.

Figure 44. Date format page

Viewing the Settings Screen
Touch the Settings button in the main menu area
(Figure 39, p. 49) to view the Settings screen. Display
Settings identifies a column of buttons located on the
screen (see Figure 43).The buttons are:
•

Display Preferences

•

Language

•

Date andTime

•

Clean Display

Each button provide access to a screen that is related to the
button name.

To change the format:

Viewing and Changing Display Preferences

2. Touch Save to confirm your selection and to return to
the Display Preferences screen.

On the Settings screen, touch Display Preferences to view
a screen containing these buttons (see Figure 43):

1. Touch the button that shows that format you prefer.

•

Date Format

Date Format . Use the Date Format screen to choose
from the following date formats:

•

Date Separator

•

MMDDYYYY (default)

•

Time Format

•

YYYYMMDD

•

Unit System

•

DDMMYYYY

•

Pressure Units

Date Separator . Use the Date Separator screen to

•

Number Format

choose from the following date formats:

Figure 43. Display reference screen

•

None

•

Slash (default)

•

Hyphen

Time Format . Use theTime Format screen to choose
from the following time formats:
•

12 hour (default)

•

24 hour

Units System . Use the Display Units screen to choose
from the following display units:
•

SI

•

Inch-Pounds (default)

Pressure Units . Use the Pressure Units screen to
choose from the following pressure units:
Each of the buttons shows the name of a display
preference and its format (current value).Touch any of
these buttons to view a screen where you can change the
format.The button representing the format currently used
is shaded (see the “MMDDYYYY” button).

•

kPaA (default if “SI” is chosen for display units)

•

kPaG

•

PSIA (default if “Inch-Pound” is chosen for display
units)

•

PSIG

Number Format .

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•

1000000.0

•

1000000,0
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To change the date or time:
Figure 45. Language page

1. Touch the square presenting the attribute you want to
change.The square becomes highlighted.
2. Touch the up or down arrow key on the screen until the
your desired selection appears. Repeat the process for
any other attributes you want to change.
3. Touch Save to confirm your selection and return to the
Settings screen.

Cleaning the Display

The language that is currently in use on the display is
expressed as the current value on the Language screen.
The button that displays the current value is shaded (see
the “English” buttoninFigure19as an example).

On the Settings screen, touch Clean Display to disable the
Tracer AdaptiView display screen for 15 seconds so that
you can clean the screen without it responding to touch.
During this time, the screen is black with a number in the
center that counts down the seconds. After 15 seconds, the
Settings screen re-appears.
Figure 47.

Countdown screen

To change the language:
1. Touch the button that identifies the language you
prefer.
2. Touch Save to confirm your selection and to return to
the Settings screen.
Figure 46. Date and time screen

Security Settings
If security if enabled, theTracer AdaptiView display
requires that you log in with a four-digit security PIN to
make setting changes that are protected by security.This
feature prevents unauthorized personnel from doing so.
There are two levels of security, each allowing specific
changes to be made.

The current date and time for the display is expressed as
the current value.The current value appears below the
center line on the screen.
Above the center line, the following date and time
attributes appear:
•

Month

You can view all data without logging in.The log-in screen
appears only when you try to change a setting that is
protected by security, or when you touch the Log in button
from the Settings screen.

Disabling/Enabling Security
TheTracer AdaptiView display gives you the ability to
disable or enable the security feature that allows a user to
log in and log out.

•

Day

•

Year

•

Hour

1. From the Settings screen, touch the Security button.
The Security screen appears (Figure 48).

•

Minute

Note: If you are logged out, the Log in screen appears.

•

AM/PM

2. Touch the Disable button.The button becomes shaded.

52

To disable security, you must be logged in:

RTAE-SVX001B-EN

Controls
3. Touch Save.The Settings screen appears with only the
Security button visible.The Log in/Logout button is
gone.

2. Use the keypad to enter your PIN.

To enable security:

a. The PIN is a four-digit number, which was
configured for your system with theTracerTU
service tool.

1. From the Settings screen, touch the Security button.
The Security screen appears (Figure 48).

b. As you enter the number, the PIN remains hidden
by asterisks.

2. Touch the Enable button.The button becomes shaded.
3. Touch Save.The Settings screen appears with a Log
out button, in addition to the Security button.
Figure 48. Security screen - disable

Note: If you enter an invalid PIN, an error message
appears on the Log in screen.
3. Touch Save.
a. If you viewed the Log in screen from touching Log
in on the Settings screen, the Settings screen
appears with a Log out button on it.
b. If the Log in screen appeared when you tried to
change a setting, you return to that setting screen.
Note: The PIN is valid until 30 minutes of inactivity
passes, or until you log out.
Figure 50. Log in screen

Figure 49. Security settings screen

Logging Out
To log out:
1. Touch the Log out button. A confirmation screen
appears (Figure 51).

Logging In
There are two levels of security:
•

Security Level 1 allows users to change a limited group
of secure settings.The default security PIN is 1111.

•

Security Level 2 allows users to change all secure
settings.The default security PIN is 7123.

2. TouchYes to confirm that you want to log out.The
Settings screen appears with a Log in button on it.
Figure 51.

Log out confirmation screen

A technician must use theTracerTU service tool to define
a different PIN, or to recall a PIN that has been forgotten.
When defining a PIN inTracerTU, the technician enters a
4-digit PIN that corresponds with the desired level of
security.
To log in:
1. Touch the Log in button.The Log in screen appears
(Figure 49).
RTAE-SVX001B-EN

53

Controls

InvisiSound Ultimate - Noise Reduction
Mode
When the InvisiSound Ultimate option is selected (model
number digit 12=3), noise reduction mode can be enabled
to adjust fan speed and lower maximum sound levels.
Reduced acoustic noise levels can be set for certain times,
or on a schedule.The noise reduction feature can be
requested by local time of day scheduling, external input
or building automation system.
To enable this function at the external display:
•

Access the Settings screen on theTracer AdaptiView.
See Figure 52.

Figure 52. Noise reduction mode settings

•

Set the Front Panel Noise Reduction Request to ON.

•

Adjust the Noise Reduction Condenser Fan Speed
Clamp to desired value.
• Setting for fan speed is as a percentage of 920 rpm
maximum fan speed
Example:
For fan speed of 700 rpm, enter a value of 76%
• Acceptable inputs are 60% (552 rpm) to 100% (920
rpm) in 1% increments

54

RTAE-SVX001B-EN

Controls

Tracer™ TU
The AdaptiView™TD7 operator interface allows for daily
operational tasks and setpoint changes. However, to
adequately service Stealth chillersTracer™TU service tool
is required. (Non-Trane personnel, contact your local
Trane office for software purchase information.)TracerTU
adds a level of sophistication that improves service
technician effectiveness and minimizes chiller downtime.
This portable PC-based service-tool software supports
service and maintenance tasks, and is required for
software upgrades, configuration changes and major
service tasks.
TracerTU serves as a common interface to allTrane®
chillers, and will customize itself based on the properties of
the chiller with which it is communicating.Thus, the
service technician learns only one service interface.
The panel bus is easy to troubleshoot using LED sensor
verification. Only the defective device is replaced.Tracer
TU can communicate with individual devices or groups of
devices.
All chiller status, machine configuration settings,
customizable limits, and up to 100 active or historic
diagnostics are displayed through the service-tool
software interface.

TracerTU is designed to run on a customer’s laptop,
connected to theTracer AdaptiView control panel with a
USB cable.Your laptop must meet the following hardware
and software requirements:
• 1 GB RAM (minimum)
• 1024 x 768 screen resolution
• CD-ROM drive
• Ethernet 10/100 LAN card
• An available USB 2.0 port
• Microsoft® Windows® XP Professional operation
system with Service Pack 3 (SP3) or Windows 7
Enterprise or Professional operating system (32-bit
or 64-bit)
• Microsoft .NET Framework 4.0 or later
Notes:
• TracerTU is designed and validated for this minimum
laptop configuration. Any variation from this
configuration may have different results.Therefore,
support forTracerTU is limited to only those laptops
with the configuration previously specified.
•

For more information, seeTTU-SVN01A-ENTracerTU
Getting Started Guide

LEDs and their respectiveTracerTU indicators visually
confirm the availability of each connected sensor, relay,
and actuator.
Figure 53. Tracer TU

RTAE-SVX001B-EN

55

Pre-Start
Upon completion of installation, complete the Stealth™
RTAE Installation Completion Check Sheet and Request for
Trane Service checklist in chapter “Log and Check Sheet,”
p. 90.
Important:

56

Start-up must be performed byTrane or an
agent ofTrane specifically authorized to
perform start-up and warranty ofTrane
products. Contractor shall provideTrane (or
an agent ofTrane specifically authorized to
perform start-up) with notice of the
scheduled start-up at least two weeks prior
to the scheduled start-up.

RTAE-SVX001B-EN

Start-Up and Shutdown
Important:

Initial unit commissioning start-up must be
performed byTrane or an agent ofTrane
specifically authorized to perform start-up
and warranty ofTrane products. Contractor
shall provideTrane (or an agent ofTrane
specifically authorized to perform start-up)
with notice of the scheduled start-up at least
two weeks prior to the scheduled start-up.

Unit Start-Up
NOTICE:
Equipment Damage!
Ensure that the compressor and oil sump heaters have
been operating properly for a minimum of 24 hours
before starting. Failure to do so could result in
equipment damage.
If required, once the system has been operating for
approximately 30 minutes and has become stabilized,
complete the remaining start-up procedures, as follows:
1. Check the evaporator refrigerant pressure and the
condenser refrigerant pressure under Refrigerant
Report on the AdaptiView ™TD7.The pressures are
referenced to sea level (14.6960 psia).
2. Check the EXV sight glasses after sufficient time has
elapsed to stabilize the chiller.The refrigerant flow past
the sight glasses should be clear. Bubbles in the
refrigerant indicate either low refrigerant charge or
excessive pressure drop in the liquid line or a stuck
open expansion valve. A restriction in the line can
sometimes be identified by a noticeable temperature
differential between the two sides of the restriction.
Frost will often form on the line at this point. Proper
refrigerant charges are shown in the General
Information Section.
Important: A clear sight glass alone does not mean that
the system is properly charged. Also check
system subcooling, liquid level control and
unit operating pressures.

and automatically restart the pump when the unit
starts normally.
3. The unit will start normally, provided the following
conditions exist:
a. The UC800 receives a call for cooling and the
differential-to-start is above the setpoint.
b. All system operating interlocks and safety circuits
are satisfied.

Extended Shutdown Procedure
The following procedure is to be followed if the system is
to be taken out of service for an extended period of time,
e.g. seasonal shutdown:
1. Test the unit for refrigerant leaks and repair as
necessary.
2. Open the electrical disconnect for the chilled water
pump. Lock the switches in the “OPEN” position.

NOTICE:
Equipment Damage!
To prevent pump damage, lock the chilled water pump
disconnects open and verify pump is off before draining
water.
3. Close all chilled water supply valves. Drain the water
from the evaporator.
4. With the water drained from evaporator, disconnect
115 power from evaporator heaters at terminals 1X4-1
and 1X4-2.

NOTICE:
Equipment Damage!
Applying power to the evaporator heaters when no
water is present could result in damage to heaters.
5. Open the main electrical disconnect and lock in the
“OPEN” position.

If chiller is limited by any limiting conditions, contact local
Trane service organization for more information.

NOTICE:
Equipment Damage!

Temporary Shutdown And
Restart

Lock the disconnect in the “OPEN” position to prevent
accidental start-up and damage to the system when it
has been shut down for extended periods.

To shut the unit down for a short time, use the following
procedure:
1. Press the STOP key on the AdaptiviewTD7.The
compressors will continue to operate and an
operational pumpdown cycle will be initiated..

6. At least every three months (quarterly), check the
refrigerant pressure in the unit to verify that the
refrigerant charge is intact.

2. UC800 pump control will turn off the pump (after a
minimum 1 min. delay) when the STOP key is pressed
RTAE-SVX001B-EN

57

Start-Up and Shutdown

Seasonal Unit Start-Up Procedure
1. Close all valves and re-install the drain plugs in the
evaporator.
2. Service the auxiliary equipment according to the startup/maintenance instructions provided by the
respective equipment manufacturers.
3. Close the vents in the evaporator chilled water circuits.
4. Open all the valves in the evaporator chilled water
circuits.
5. Open all refrigerant valves to verify they are in the
open condition.
6. If the evaporator was previously drained, vent and fill
the evaporator and chilled water circuit. When all air is
removed from the system (including each pass), install
the vent plugs in the evaporator water boxes.
7.

Check the adjustment and operation of each safety and
operating control.

8. Refer to the sequence for daily unit startup for the
remainder of the seasonal startup.

System Restart After Extended
Shutdown

NOTICE:
Proper Water Treatment!
The use of untreated or improperly treated water in
this equipment could result in scaling, erosion,
corrosion, algae or slime. It is recommended that the
services of a qualified water treatment specialist be
engaged to determine what water treatment, if any, is
required. Trane assumes no responsibility for
equipment failures which result from untreated or
improperly treated water, or saline or brackish water.
4. Close the fused-disconnect switches that provides
power to the chilled water pump.
5. Start the evaporator water pump and, while water is
circulating, inspect all piping for leakage. Make any
necessary repairs before starting the unit.
6. While the water is circulating, adjust the water flows
and check the water pressure drops through the
evaporator. See “Evaporator Waterside Pressure Drop
Curves,” p. 27 and water flow rates in Table 1, p. 10.
7. Verify proper operation of flow switch on the
evaporator waterbox.
8. Stop the water pump.The unit is now ready for startup as described previously.

NOTICE:
Equipment Damage!
Ensure that the compressor and oil sump heaters have
been operating properly for a minimum of 24 hours
before starting. Failure to do so could result in
equipment damage.
Follow the procedures below to restart the unit after
extended shutdown:
1. Verify that the liquid line service valves, oil line,
compressor discharge service valves and suction
service valves are open (backseated).

NOTICE:
Compressor Damage!
Catastrophic damage to the compressor will occur if
the oil line shut off valve or the isolation valves are left
closed on unit start-up.
2. Check the oil sump level (see “Oil Sump Level Check,”
p. 69).
3. Fill the evaporator water circuit. Vent the system while
it is being filled. Open the vent on the top of the
evaporator and condenser while filling and close when
filling is completed.

58

RTAE-SVX001B-EN

Start-Up and Shutdown

Sequence of Operation
This section will provide basic information on chiller
operation for common events. With microelectronic
controls, ladder diagrams cannot show today’s complex
logic, as the control functions are much more involved
than older pneumatic or solid state controls.

•

The text in the circles is the visible top level operating
modes that are displayed onTracer™ AdaptiView.

•

The shading of each software state circle corresponds
to the shading on the time lines that show the state the
chiller is in.

Adaptive control algorithms can also complicate the exact
sequence of operations.This section illustrates common
control sequences.

There are five generic states that the software can be in:

Software Operation Overview
The Software Operation Overview shown in Figure 54,
p. 59 is a diagram of the five possible software states.This
diagram can be though of as a state chart, with the arrows
and arrow text depicting the transitions between states.

•

Power Up

•

Stopped

•

Starting

•

Running

•

Stopping

•

Figure 54. Software operation overviewFigure 54
Power Up

Boot and
Self Test

Stopped
or

Run Inhibit
Co Auto
mm
an
d

ed
rm
nfi wn
Co utdo
h
S

Re
of leas
Inh e
ibi
t

Shutting Down

Auto
or

Stop Command or Diagnostic

Waiting to Start

Sto

pC

om

rt

ma

Dia

nd

gn

ed

os

firm

n

Co

tic

Sta

Check for
Differential
to Start

Running
or

Running Limit
Check for
Differential
to Stop

Timelines
•

The time line indicates the upper level operating mode,
as it would be viewed on theTracer™ AdaptiView.

•

Text outside a box or cylinder indicates time based
functions.

•

The shading color of the cylinder indicates the
software state.

•

Solid double arrows indicate fixed timers.

•

Dashed double arrows indicate variable timers.

•

Text in parentheses indicates sub-mode text as viewed
onTracer AdaptiView.

•

Text above the time line cylinder is used to illustrate
inputs to the Main Processor.This may include user
input to theTracer AdaptiViewTouch screen, control
inputs from sensors, or control inputs from a Generic
BAS.

•

Boxes indicate control actions such as turning on
relays, or pulsing compressor load or unload
solenoids.

•

Smaller cylinders under the main cylinder indicate
diagnostic checks.

RTAE-SVX001B-EN

59

Start-Up and Shutdown

Power Up Diagram

will transition through the 'Stopped' Software state
independent of the last mode. If the last mode before
power down was 'Auto', the transition from 'Stopped' to
'Starting' occurs, but it is not apparent to the user.

Figure 55, p. 60 shows the respectiveTD-7 AdaptiView
screens during a power up of the UC800 and display. This
process takes 25 seconds for the UC800 and 90 seconds for
the display. On all power ups, the software model always
Figure 55. Sequence of operation: power up diagram

Second Trane Logo - Loading
User Interface Template...

Operator Display Power Up

Display Ready

Black Screen

Grey Screen

First Trane Logo

Black Screen
10 Sec

18 Seconds

Loading Data….

*Display will show
either Auto or Stop
button as “ ac tive”
(depressed) once
it is ready

6/30/2012

5 Secc 90 second2
27
7oSeconds
SDeicpolnydrseady

15 Sec

15 Seconds

90 seconds to Disp
pllay read
dy

7o/a1d
6/-20
102sec Total to Display Ready
14p/ 2and
a0n1d2 Load
9
y
Operator Display Boot6t /U
Up
90

11/16// 2012
1122/11/2012
M ileston
ne Descrription
M estoneMDielesscription
Mile
sctroipnteioDnescription
(39 Seconds)
Minimum Time Until 1st Compressor Could Restart
(if “P ower Up Delay Inhibit” s et to 0; Default is 105 sec))
6/14/2012 - 12/10/2012

Starting Sequence
S ee “ P ower Up to
S tarting” S equenc e Diagram

6/12/2012 - 12/11/2012

External
Power
Applied

UC800 Boot Up
Last Mode
Auto*
Booting UC800
(25 Seconds)

Operator Display
D6i/s1p6l/a2y01and
a2n UC800
Figure 1 [A
Start
SdtaarpttiBooting
Bvoieow
tinBgoot Screen]
12/11//2012
UC800 Fully Operational
IPC Bus Comm Begins

60

6/14/2012 7/16/2012

M ilestone
e DM
Milesto
M
esicleispttoin
oen Description
IF
Last Mode
Stop*
6/12/2012 - 12/9/2012

Stopped

Continue Along Start
Sequence
S ee “ P ower Up
to S tarting”

12/11/2012
Milesttone Description

Remain in
“ S top” indefinitely
until “ A uto”
command- See
“ S topped T o S tarting”

RTAE-SVX001B-EN

Start-Up and Shutdown

Power Up to Starting
Figure 56, p. 61 diagram shows the timing from a power
up event to energizing the 1st compressor.The shortest
allowable time would be under the following conditions:
•

No motor restart inhibit time left from subsequent
starts

•

Evaporator Water flow occurs quickly with pump on
command

•

Power up Start Delay set to 0 minutes

•

Need to cool (differential to start) already exists

•

Oil level is detected immediately

The above conditions would allow for a minimum power
up to starting the 1st compressor time of about 45 seconds
(variations may exist due to options installed). Note that it
is not advisable to start a chiller “cold”, the oil heaters
should be in operation for a sufficient length of time prior
to first start. Consult the chiller’s IOM for specifics.

Figure 56. Sequence of events: power up to starting
Auto Mode commanded
by Front Panel or BAS
6/12/2012 - 7/3/2012

Power
Up

Power
Applied

Call for Cooling
(Differential to Start is met)
10/1/2012 - 10/31/201210/30/2012 - 12/11/2012
9/2/2012 - 10/2/2012

7/2/2012 - 9/3/2012

UC800
Confirm Evaporator Water Flow
Boot Time (6 Second Filter)
(25 Sec)

6/13/2012

7/3/2012
Enforce
E
nf
Restart Inhibit Timer
as
sd((00f to 1 minute)

EXVs selfclose on
power up

Waiting
To Start

Auto

Auto

Wait for Need
To Cool
((Diff to Start)

9/3/2
2012
as
sdf

Power Up Delay Inhibit Timer
(User Adjustable 0 to 30 minutes)

Confirm
Presence of Oil
(0 to 90 seconds)

Energize Evaporator
6//14/2
20Water
12
W
Wa
Pump Relay
6/12/2012 - 12/11/2012
Confirm Evaporator Water
Flow Within 20 minutes
(6 Second Filter)

EXV remains closed

Transition to
Running

EXV moving to
Preposition
Send Start Command
0 to 25 Seconds
12/11/2012 to Lead Compressor*

asdf
0/2/2012
asdf

0/31/2012
asdf

6/12/2012 - 12/11/2012

Oil Heaters
Always Energized
when Compressor
is De-energized

Waiting
To Start

Confirm
Presence
/1
15/20C
1o
2
of Oil Within
90 Seconds

Start Control of
Condenser Fan Flow

Pre-Position
P
Pr
eP
EXV of
6/1
14/2012
L
Lead Circuit

6/ 13/ 2012 - 12/ 10/ 2012
Check Evap Pressure for
Low Pressure Cutout

* Lead compressor (and its lead circuit) is
determined by staging algorithm - “Fixed Staging”
or “Balanced Wear” selection - also influenced by
lockouts, restart inhibit, or diagnostics present.

* Lead Compressor (and its lead circuit) is
determined by staging algorithm – “ F ixed S taging”

RTAE-SVX001B-EN

61

Start-Up and Shutdown

Stopped to Starting
Figure 57 shows the timing from a stopped mode to
energizing the 1st compressor. The shortest allowable
time would be under the following conditions:

•

Evaporator Water flow occurs quickly with pump on
command

•

Need to cool (differential to start) already exists

•

The above conditions would allow a compressor to start in
about 20 seconds.

No motor restart inhibit time left from subsequent
starts

Figure 57.

Sequence of events: stopped to starting
Auto Mode commanded
by Front Panel or BAS
Stopped
Or Run
Inhibit

6/12/2012 - 7/3/2

Stop

7/2/2012 - 9/3/2012

10/1/2012 - 10/31/201210/30/2012 - 12/11/2012
9/2/2012 - 10/2/2012

Waiting
To Start

Auto

Auto
Confirm Evaporator Water Flow
(6 Second Filter)

6/13/2012

Call for Cooling
(Differential to Start is met)

Wait for Need
To Cool
((Diff to Start)

7/3/2
2012
2012
Enforce Restart Inhibit Timerr9/3/2
E
as
sdf
as
sdf
(0 to 1 minute)

Confirm
Presence of Oil
(0 to 90 seconds)

6/12/2012 - 12/11/2012
Confirm Evaporator Water
Flow Within 20 minutes
(6 Second Filter)
Oil Heaters
Always Energized when
Compressor is De-energized

Transition to
Running

EXV moving to
Preposition
Send Start Command
0 to 25 Seconds
12/11/2012 to Lead Compressor*

asdf
0/2/2012
asdf

0/31/2012
asdf

6/12/2012 - 12/11/2012
Energize Evaporator
6//14/2
20Wa
12
W
Water
Pump Relay

Waiting
To Start

Confirm
Presence
/1
15/2
20C
1o
2
of Oil Within
90 Seconds

Start Control of
Condenser Fan Flow

Pre-Position
P
Pr
eP
EXV of
6/1
14//2012
L
Lead Circuit

6/ 13/ 2012 - 12/ 10/ 2012
Check Evap Pressure for
Low Pressure Cutout

* Lead compressor (and its lead circuit) is
determined by staging algorithm - “Fixed Staging”
or “Balanced Wear” selection - also influenced by
lockouts, restart inhibit, or diagnostics present.

EXV remains closed

* Lead Compressor (and its lead circuit) is
determined by staging algorithm – “ F ixed S taging”

62

RTAE-SVX001B-EN

Start-Up and Shutdown

Running (Lead Compressor/Circuit Start and Run)
Figure 58 shows a typical start and run sequence for the
lead compressor and its circuit.
Figure 58. Sequence of operation: running (lead compressor/circuit start nd run)
Chiller and Lead Circuit
Mode is “Running” - Lag
Circuit Mode is “Auto”
6/12/2012 - 7/24/2012

Running

Lead
Compressor
Running

Enter
Limit Mode

Running

Stage On
Setpoint Met*

Exit
Limit Mode

8/14/2012 - 9/11/2012
7/23/2012 - 8/14/2012 Running

0/28/2012 - 12/11/2012
9/10/2012 - 10/29/2012

Running

Running

Lag Circuit:
Waiting to Start

Lead Circuit:
Running Limit

Hold EXV Pre-position
(10 Seconds)

EXV moving to preposition
0 to 25 Seconds
8/15//2012

7/24//2012

6/13//2012

Hold EXV of Lead
Circuit at preposition for 10 sec

Modulate
Compressorr9/11//2012
Speed for
Limit Control

10/29/2012
Modulate Compressorr
Speed for
Capacity Control

12/11//2012
Start Control of
Condenser Fan Flow
on Lag Circuit

Modulate EXV for
Liquid Level &
Pressure Control

De-energize
Oil Heaters
Of Lead Circuit

Send Start Command
to Lag Compressor

Pre-Position EXV of
Lag Circuit

Modulate Compressor
Speed for
Capacity Control

Continue
Running

Prepare to Start
Lag Compressor,
Check for Oil,
Check for LPC

Control Lead Circuit
Condenser Fans for
Optimum Differential
Pressure,
ƒ(Cprsr Spd, OA Temp)
6/12/2012 - 12/11/2012
6//13/2012
Mileston
ne Description

Enforce All Running Mode Diagnostics for Chiller, Lead Compressor and its Circuit

*Note: The decision to stage on or off another compressor is determined by
the Average Running Compressor Load Command, Water Temperature Error, and Time Since Last Stage

Running (Lag Compressor/Circuit Start and Run)
Figure 59 shows a typical start and run sequence for the
lag compressor and its circuit.
Figure 59. Sequence of operation: running (lag compressor/circuit start nd run)
Chiller and Both Circuit
Modes are “Running”
6/12/2012 - 7/24/2012

Both
Compressors
Running

Enter
Limit Mode

8/13/2012 - 9/11/20
01 2
7/23/2012 - 8/14/2012Running

Running

Running

Exit
Limit Mode

Both Compressors Running
At or Near Max Speed
(Unable to Achieve CWSP)

9/11/2012 - 10/30/2012

0/28/2012 - 12/11/2012

Running

Running

Lag Circuit:
Running Limit

Hold EXV Pre-position
(10 Seconds)
8/13//2012
7/24//2012

6/13//2012

Hold EXV of Lag
Circuit at preposition for 10 sec
De-energize
Oil Heaters
Of Lag Circuit

Modulate
Compressor 9/11//2012
Speed for
Limit Control

10/30//2012
2
Modulate Compressorr
Speed for
Capacity Control

Modulate EXV for
Liquid Level &
Pressure Control

Energize Maximum
Capacity Relay after the
Adjustable Filter Time
(0 to 600 Seconds)

Continue
Running
(Both
Comprsrs
& Max
Capacity

Maximum Capacity
Submode

Modulate Compressor
Speed for
Capacity Control

Control Both Circuit
Condenser Fans for
Optimum Differential
Pressure,
ƒ(Cprsr Spd, OA Temp)
6/12/2012 - 12/11/2012
6//13/2012
Mileston
ne Description

Enforce All Running Mode Diagnostics for Chiller, Lead Compressor and its Circuit

*Note: The decision to stage on or off another compressor is determined by
the Average Running Compressor Load Command, Water Temperature Error, and Time Since Last Stage

RTAE-SVX001B-EN

63

Start-Up and Shutdown

Satisfied Setpoint
Figure 60 shows the normal transition from Running to
shutting down due to the Evap Leaving water temp falling
below the differential to stop setpoint.
Figure 60. Sequence of events: satisfied setpoint
Differential to Stop is Met
6/12/2012 - 8/10/2012
Running
Last
Compressor
At Min Speed

6/13/2012

Normal Pumpdown Termination**
Criteria
is Met-for
Last Circuit
10/13/2012
12/11/2012

8/10/2012 - 10/13/2012

Running

Shutting Down

Auto

Last Circuit Mode:
Running

Last Circuit Mode: Shutting Down

Both Circuit Modes:
Waiting for Need to Cool

SubMode: Operational Pumpdown*

Auto

Operational Pumpdown
(0 Seconds to 2 Minutes)
Close EXV
(0 to 25 Seconds)
8/11/2012

10/14/2012

Fully Close EXV

IF*
Pumpdown
Required

12/11/2012

Turn Off Last Circuit’s
Condenser Fans

No Pumpdown Required

Perform Operational
Pumpdown for Last
Circuit if Required*

Send Stop Command
To Compressor

6/12/2012 - 12/11/2012
6/1
15/2
201En
2
1ni
2i/n1g
1/2012
Enforce
E
All Non Running

6/12/2012 - 12/11/2012
Check for 12/11/2012
6/1
15/2
2 01 2
Normal Pumpdown
Termination Criteria Met **

Mode Diagnostics

Energize Last Circuit
Oil Heaters

* Note: Operational Pumpdown is required if the Outdoor Air Temperature is less than 50F.
** Note: Operational Pumpdown is Terminated Normally when the Evaporator Refrigerant
Pressure is at or below 20 PSIA.
The Maximum Allowed Time for Operational Pumpdown is 2 Minutes.

64

RTAE-SVX001B-EN

Start-Up and Shutdown

Normal Shutdown to Stopped or Run Inhibit
Figure 61 shows theTransition from Running through a
Normal (friendly) Shutdown. The Dashed lines on the top
Figure 61.

attempt to show the final mode if you enter the stop via
various inputs.

Sequence of events: normal shutdown to stopped or run inhibit
Local Stop
Chiller Level Diagnostic – Normal Shutdown Latched
Chiller Level Diagnostic – Normal Shutdown Nonlatched
Building Automation System Stop
External Auto-Stop
Normal Pumpdown Termination**
/15is
2 t- ffor
1o0r/1A
/l2l0C
2i
Criteria
r8ia
is/20M
Met
e
All
Circuits

6/12/2012 - 8/15/2012
One or
More
Circuits
Running

Shutting Down

Stopped or Run Inhibit

Running Circuit Modes: Shutting Down

Circuit Modes:
Auto

Circuit Modes:
Stopped or Auto

SubMode: Operational Pumpdown*
Operational Pumpdown
(0 Seconds to 2 Minutes)
Close EXV
(0 to 25 Seconds)
6/13/2012

Stopp
or

Run In

Evaporator Pump Off Delay
(Adjustable 1 to 30 Minutes)
8/15/2012

12/11/2012
Send Stop Command to
All
Running Compressors

Fully Close EXV

IF*

0/16/2012 - 12/11/2012

Shutting Down

De-Energize Evaporator
Water Pump Relay
10/17/2012
2

No Pumpdown Required

Perform Operational
Pumpdown for All
Running Circuits if
Required*

Pumpdown
Required

6/12/2012 - 12/11/2012
Check for
2012
Normal Pumpdown
Termination Criteria Met **

6/1
15//2012

*Note: Operational Pumpdown is required if the
Outdoor Air Temperature is less than 50°F.

Energize All Heaters

Fully Close Both EXVs

Turn Off All Running
Circuits Condenser Fans

** Note: Operational Pumpdown is terminated
normally when the Evaporator Refrigerant Pressure
is at or below 20 psia.
The Maximum Allowed time for Operational Pumpdow
is 2 minutes.

Immediate Shutdown to Stopped or Run Inhibit
Figure 62 shows theTransition from Running through an
Immediate Shutdown. The dashed lines on the to attempt

to show the final mode if you enter the stop via various
inputs.

Figure 62. Sequence of events: immediate shutdown to stopped or run inhibit
Chiller Level Diagnostic – Immediate Shutdown Non-Latching
Chiller Level Diagnostic – Immediate Shutdown Latching
Front Panel Immediate Shutdown
One or More
Running
Compressors

6/12/2012 - 9/29/2012

9/29/2012 - 12/11/2012

Shutting Down

Stopped

Run Inhibit
or

Stopped
Compressor Deceleration Time

6/13/2012
asdf
Send Stop Command to
All Running Compressors

9/29//2012
as
sdf

12/11/2012
asdf

De-Energize Evaporator
Water Pump Relay

Energize All Heaters

Fully Close Both EXVs

Turn Off All
Running Circuits
Condenser Fans

RTAE-SVX001B-EN

65

Start-Up and Shutdown

Ice Making (Running to Ice Making to Running)
Figure 63 shows the transition from normal cooling to Ice
making, back to normal cooling
Figure 63. Sequence of events: ice making (running to ice making to running)
Ice Making Command:
1. Tracer
2. External
3. Front Panel
Running

Running
(Unit is Building Ice)

Maximum 1:10 to fully
loaded

Run Inhibit
(Ice to Normal Transition)

Auto

Ice To Normal Transition Timer
(fixed 2 mins)

Stage and modulate all
compressors in
sequence to full load
(if not already)
Ignore Softloading and
Set CLS = 100%
Energize Ice Building
Relay

De-energize Heaters, and
Control EXVs per normal
staging - See other
sequence diagrams

Control Circuit’s
Condenser Fans for Diff
Pressure
Head Relief Request
Relay Delay (1 to 60
mins adj)

Evap Leaving
Water Temp Rises
Above the
Differential To Start

Ice Making Command
Withdrawn (prior to
ice complete)

Energize Head Relief
Request Relay

Run Unload, Close EXVs and
Perform Operational Pumpdown (if
regd) then Shutoff Compressors,
Energize Heaters
Confirm No
Compressor Currents

Close EXVs or leave closed
for Circuits’ Off Cycle

Turn off both Circuits’
Condenser Fans

Running

Running

Pre-position EXV, Prestart
Condenser Fans

Start Compressors and
Circuits per normal
staging – See other
sequence diagrams
Control Circuit’s
Condenser Fans for Diff
Pressure

De-energize Heaters, and
Control EXVs per normal
staging - See other
sequence diagrams

De-Energize Head
Relief Request and Ice
Building Relay
Enforce All Limits and Running Mode Diagnostics

Continue to Run Evap
Water Pump Throughout

Enforce All Limits and
Running Mode Diagnostics

66

RTAE-SVX001B-EN

Start-Up and Shutdown

Ice Making (Auto to Ice Making to Ice Making Complete)
Figure 64 shows the transition from Auto to Ice making, to
Ice Making Complete.
Figure 64. Sequence of events: ice making (auto to ice making to ice making complete)

g

pp

g

Ice Making Command:
1. Front Panel
2. Tracer
3. External Input
Auto

Auto

Running
(Unit is Building Ice)
Maximum 1:10 to fully
loaded
Stage and modulate all
compressors in
sequence to full load
(if not already)
Ignore Softloading and
Set CLS = 100%
Energize Ice Building
Relay

De-energize Heaters, and
Control EXVs per normal
staging - See other
sequence diagrams

p

Evap Entering Water
Temp Falls Below the
Ice Termination Setpoint

Shutting Down
Run Unload, Close EXVs and
Perform Operational Pumpdown
(if regd) then Shutoff
Compressors, Energize Heaters

Run Inhibit –
Submode: Ice
Building Complete
will return to “Auto” and normal cooling
mode with removal of Ice Command

Enforce All Non- Running
Mode Diagnostics

Confirm No
Compressor Currents

De-Energize Ice
Building Relay
De-Energize Head
Relief Request Relay

Leave EXVs Closed or
Close EXV for Circuits’
Off Cycle

Turn off both Circuits’
Condenser Fans
De-Energize Evaporator
Water Pump Relay (no
delay time applied)

Control Circuit’s
Condenser Fans for Diff
Pressure

Head Relief Request Relay
Delay (1 to 60 mins adj)

Energize Head Relief
Request Relay

Enforce All Limits and
Running Mode Diagnostics

RTAE-SVX001B-EN

67

Maintenance
WARNING
Hazardous Voltage - Pressurized Burning
Fluid!
The motors in the compressors have strong permanent
magnet motors and have the capability to generate
voltage during situations when the refrigerant charge is
being migrated. This potential will be present at the
motor terminals and at the output of the variable speed
drives in the power panel.
Before removing compressor terminal box cover for
servicing, or servicing power side of control panel,
CLOSE COMPRESSOR DISCHARGE SERVICE VALVE
and disconnect all electric power including remote
disconnects. Discharge all motor start/run capacitors.
Follow lockout/tagout procedures to ensure the power
cannot be inadvertently energized. Verify with an
appropriate voltmeter that all capacitors have
discharged.
The compressor contains hot, pressurized refrigerant.
Motor terminals act as a seal against this refrigerant.
Care should be taken when servicing NOT to damage
or loosen motor terminals.
Do not operate compressor without terminal box cover
in place.
Failure to follow all electrical safety precautions could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see “Adaptive Frequency™ Drive (AFD3)
Capacitor Discharge,” p. 32 and PROD-SVB06A-EN.

WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run and AFD
(Adaptive Frequency™ Drive) capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power cannot be inadvertently energized.
•

For variable frequency drives or other energy storing
components provided byTrane or others, refer to the
appropriate manufacturer’s literature for allowable
waiting periods for discharge of capacitors. Verify
with an appropriate voltmeter that all capacitors
have discharged.

•

DC bus capacitors retain hazardous voltages after
input power has been disconnected. Follow proper
lockout/tagout procedures to ensure the power
cannot be inadvertently energized. After
disconnecting input power, wait five (5) minutes for
the DC capacitors to discharge, then check the
voltage with a voltmeter. Make sure DC bus
capacitors are discharged (0 VDC) before touching
any internal components.

Failure to follow these instructions could result in death
or serious injury.
For additional information regarding the safe discharge
of capacitors, see “Adaptive Frequency™ Drive (AFD3)
Capacitor Discharge,” p. 32 and PROD-SVB06A-EN.
This section describes the basic chiller preventive
maintenance procedures, and recommends the intervals
at which these procedures should be performed. Use of a
periodic maintenance program is important to ensure the
best possible performance and efficiency from a Stealth™
chiller.
Use an Operator Log (see “Log and Check Sheet,” p. 90) to
record an operating history for unit.The log serves as a
valuable diagnostic tool for service personnel. By
observing trends in operating conditions, an operator can
anticipate and prevent problem situations before they
occur.
If unit does not operate properly during inspections, see
“Diagnostics,” p. 73.

68

RTAE-SVX001B-EN

Maintenance

Recommended Maintenance
Weekly
While unit is running in stable conditions.
1. At AdaptiView™TD7 orTracer™TU service tool, check
pressure for evaporator, condenser and intermediate
oil.
2. Observe liquid line sight glass on EXV. If liquid line
sight glass has bubbles measure the subcooling
entering the EXV. Subcooling should always be greater
than 10°F.
3. Inspect the entire system for unusual operation.
4. Inspect the condenser coils for dirt and debris. If the
coils are dirty, See “Condenser Coils — Cleaning and
Inspection,” p. 72.

NOTICE:
Equipment Damage!
Do not use detergents to clean RTAE coils. Use clean
water only. Use of detergents on RTAE coils could
cause damage to coils.

Monthly
1. Perform all weekly maintenance procedures.

Refrigerant and Oil Charge
Management
Proper oil and refrigerant charge is essential for proper
unit operation, unit performance, and environmental
protection. Only trained and licensed service personnel
should service the chiller.
Table 30 lists baseline measurements for Stealth units
running at AHRI standard operating conditions. If chiller
measurements vary significantly from values listed below,
problems may exist with refrigerant and oil charge levels.
Contact your localTrane office.
Note: Low temperature applications units will have
values that vary from Table 30. Contact your local
Trane office for more information.
Table 30.

Typical Stealth baselines (AHRI conditions)

Measurement

Baseline

Evaporator Pressure

51 psia

Evaporator Approach

3.4°F

EXV Position (150-200T units)

45-50% open

EXV Position (225-300T units)

61-64% open

Evaporator delta T - entering

54°F

Evaporator delta T - leaving

44°F

Discharge Superheat

16.5°F

2. Record the system subcooling.

Condenser Pressure

212 psia

Annual

Subcooling

10-20°F

1. Perform all weekly and monthly procedures.

Lubrication System

2. Check oil sump oil level while unit is off. See “Oil Sump
Level Check,” p. 69.
3. Perform pH test of drive cooling fluid. See “pHTest,”
p. 71.
4. Have a qualified laboratory perform a compressor oil
analysis to determine system moisture content and
acid level.
5. Contact aTrane service organization to leak test the
chiller, to check operating and safety controls, and to
inspect electrical components for deficiencies.
6. Clean and repaint any areas that show signs of
corrosion.
7.

Clean the condenser coils. See “Condenser Coils —
Cleaning and Inspection,” p. 72.

NOTICE:
Equipment Damage!
Do not use detergents to clean RTAE coils. Use clean
water only. Use of detergents on RTAE coils could
cause damage to coils.

RTAE-SVX001B-EN

The lubrication system has been designed to keep most of
the oil lines filled with oil as long as there is a proper oil
level in the oil sump.

Oil Sump Level Check
The oil level in the sump can be measured to give an
indication of the system oil charge. Follow the procedures
below to measure the level.
1. Run the unit as near to full load as possible for a
minimum of 30 minutes. For an accurate reading, 40
or more minutes at full load with normal/steady
discharge superheat readings and no limits/warnings
is recommended. Assessing oil charge after running
at minimum or low loads may lead to an inaccurate
reading.
2. Cycle the compressor off line.
3. Let the chiller sit (powered, but off line) to allow the oil
separator heater to boil off the refrigerant that may be
in the oil separator. An initial assessment of the oil
separator level may be made after 30 minutes of heater
ON dwell time, but oil charge adjustments should not
be made without allowing the oil heaters to run for a
minimum of 4 hours.

69

Maintenance
Figure 66. Nominal oil level

NOTICE:
Equipment Damage!
Never operate the compressor with the sightglass
service valves opened. Close the valves after checking
the oil level. Operating compressors with service valves
open will result in severe oil loss and equipment
damage.
4. Attach a 3/8” or 1/2” hose with a sightglass in the
middle to the oil sump service valve (1/4” flare) and the
oil separator service valve (1/4” flare). See Figure 65,
p. 70 for valve locations.
Note: Using high pressure rated clear hose with
appropriate fittings can help speed up the
process. Hose must be rated to withstand
system pressures as found on unit nameplate.
Figure 65. Oil service valves
To Oil Separator Service Valve

To Oil Separator
Service Valve

Nominal oil level
should be:
10” oil sep: 9.0”
12” oil sep: 8.5”

Oil Service Valve

5. After the unit is off line for 30 minutes, move the
sightglass along the side of the oil sump.
6. The nominal oil level from the bottom of the oil
separator should be as shown in Table 31 and
Figure 66, p. 70. Depending on running conditions and
oil heater dwell time, some deviation from nominal
levels is expected.
Important:

Table 31.

If level is less than 4 inches from the bottom
of the oil separator, contact your localTrane
office.

Oil sump level height

Unit Size (tons)

70

Oil Separator
Size

Nominal Oil
Height

150-200

225 - 300

Oil Separator Size

10”

12”

Nominal Oil Charge Height
in (mm)

9

8.5

RTAE-SVX001B-EN

Maintenance

Drive Cooling System

Figure 67.

Pressure relief cap

NOTICE:
Equipment Damage!
Use only Trane Heat Transfer Fluid P/N CHM01023. This
fluid is a direct use concentration and is not to be
diluted. Do not top off with water or any other fluid.
Use of unapproved fluids, or dilution of approved fluid
could result in catastrophic equipment damage.

Service Intervals

Pressure Relief Cap

Drive Cooling
Fluid
Expansion Tank

NOTICE:
Equipment Damage!
Drive cooling fluid and strainer must be serviced every
five (5) years. Failure to do so could result in equipment
damage.
•

Every (5) years, contact your localTrane office to
service drive fluid and strainer.

•

On a yearly basis, a fluid pH test should be performed.

Unit Diagnostics
An improperly filled drive cooling system (either low fluid
level or entrapped air in the circuit) can result in the AFD
drive or output load inductors overheating.This condition
may result in the following diagnostics:

Drive Cooling Expansion Tank

•

AFD xA Inverter Heatsink OverTemp

•

AFD xA Rectifier Heatsink OverTemp

•

AFD xA Estimated Junction OverTemp

Proper fluid level is important to the operation of the unit.
To verify proper level, inspect the liquid level in each of the
fluid reservoirs (located behind the chiller control panel).
See Figure 68 for fluid levels under various temperature
conditions. If levels levels are low, contact your localTrane
office.

•

AFD xA Load Inductor HighTemperature

Figure 68. Drive cooling expansion tank fill(a)

A front panel warning of Low Oil Return or AFD Cooling –
CktX does not indicate an issue with the drive cooling fluid
system, but represents a low refrigerant level reported by
the liquid level sensor for a given length of time.
If chiller diagnostics indicated drive cooling system
problem, contact your localTrane office.

A Max Fill 70°F (21°C)
Design Fill 125°F (51.7°C)

pH Test

B Max Fill -20°F (-28.9°C)
Design Fill 70°F (21°C)

Obtain a sample of fluid from the drive cooling loop via the
loop drain located near the oil return heat exchanger.Test
for pH level using litmus paper with a 0.5 resolution.

C Min Fill 70°F (21°C)
Design Fill -20°F (-28.9°C)

•

pH < 8 indicates fluid to be changed

•

pH < 7 indicates potential component damage

Pressure Relief Cap
The pressure relief cap is an automotive style pressurevent radiator cap. See Figure 67, p. 71.The setting for the
relief spring is 16 lbs.The function of the relief cap can be
verified with a standard automotive radiator cap tester.

RTAE-SVX001B-EN

(a) Fill lines are NOT marked on tank. The A level is just below upper fitting,
C level is just above lower fitting. B is in the middle of the fittings.

71

Maintenance

Condenser Coils — Cleaning and
Inspection

Reinstallation of Compressor
Shipping Bolts

Coil Cleaning and Inspection Interval

Units with InvisiSound™ Ultimate Only
(Model Number Digit 12 = 3)

Clean condenser coils at least once a year or more
frequently if it is in a “dirty” environment. A clean
condenser coil will help maintain chiller operating
efficiency. Perform coil inspection each time coils are
cleaned.

If compressor removal or unit move is required on a unit
with InvisiSound Ultimate option, reinstall compressor
shipping bolts which were removed in section
“Compressor Shipping Bolt Removal,” p. 23.

Cleaning Air Side of RTAE Coils

Servicing Chiller Roof

NOTICE:
Equipment Damage!

WARNING
Do Not Climb on Top of Chiller!

Do not use coil cleaning agents to clean uncoated RTAE
coils. Use clean water only. Use of coil cleaning agents
on uncoated RTAE coils could cause damage to coils.

Do not climb on roof to service unit. Use service tools
designed to access top of chiller. Failure to follow these
instructions could result in technician falling off the
equipment which could result in death or serious injury.

Do not use detergents to clean the air side of RTAE coils.
Use clean water only. Clean from inside out by removing
end panels.

Service tools are available to access top of chiller. Entry on
chiller roof is not required.

Cleaning Coated Coils
WARNING
Hazardous Chemicals!
Coil cleaning agents can be either acidic or highly
alkaline and can burn severely if contact with skin
occurs. Handle chemical carefully and avoid contact
with skin. ALWAYS wear Personal Protective Equipment
(PPE) including goggles or face shield, chemical
resistant gloves, boots, apron or suit as required. For
personal safety refer to the cleaning agent
manufacturer’s Materials Safety Data Sheet and follow
all recommended safe handling practices. Failure to
follow all safety instructions could result in death or
serious injury.
Coated coils may be cleaned using traditional detergents.

Coil Corrosion Protection Inspection
Inspect corrosion protection at each coil refrigerant
connection where the copper tube joins the aluminum
manifold. If damaged or missing, wrap new Prestite
Insulation (STR01506) on joint to cover area from the
aluminum header body to at least 2 inches of the copper
tube. Seal insulation using hand pressure. Rubber gloves
are suggested when handling insulation.

72

RTAE-SVX001B-EN

Diagnostics
Diagnostic Name and Source: Name of Diagnostic and
its source. Note that this is the exact text used in the User
Interface and/or ServiceTool displays.

shutdown results. If there is a shutdown and special action
defined in the table, then theTracerTU Diagnostics Page
display will indicate the shutdown type only.

Affects Target: Defines the “target” or what is affected
by the diagnostic. Usually either the entire Chiller, or a
particular Circuit or Compressor is affected by the
diagnostic (the same one as the source), but in special
cases functions are modified or disabled by the diagnostic.
“None” implies that there is no direct affect to the chiller,
sub components or functional operation.

Persistence: Defines whether or not the diagnostic and
its effects are to be manually reset (Latched), or can be
either manually or automatically reset when and if the
condition returns to normal (Nonlatched).

Design Note: Functions that are affected by a diagnostic
are simply reported as “chiller or circuit x” targets inTracer
TU and on the Alarms page of the AdaptiView™ display,
even though only a specific function and not the entire
circuit or chiller would be effected.
Severity: Defines the severity of the above effect.
Immediate means immediate shutdown of the affected
portion, Normal means normal or friendly shutdown of the
affected portion, Special Action means a special action or
mode of operation (limp along) is invoked, but without
shutdown, and Info means an Informational Note or
Warning is generated. Design Note:TracerTU does not
support display of “Special Action”, on its Diagnostics
pages, so that if a diagnostic has a special action defined
in the table below, it will be displayed only as
“Informational Warning” as long as no circuit or chiller

Active Modes [Inactive Modes]: States the modes or
periods of operation that the diagnostic is active in and, as
necessary, those modes or periods that it is specifically
“not active” in as an exception to the active modes.The
inactive modes are enclosed in brackets, [ ]. Note that the
modes used in this column are internal and not generally
annunciated to any of the formal mode displays.
Criteria: Quantitatively defines the criteria used in
generating the diagnostic and, if nonlatching, the criteria
for auto reset.
Reset Level: Defines the lowest level of manual
diagnostic reset command which can clear the diagnostic.
The manual diagnostic reset levels in order of priority are:
Local or Remote. For example, a diagnostic that has a reset
level of Remote, can be reset by either a remote diagnostic
reset command or by a local diagnostic reset command.

AFD Diagnostics
Table 32. AFD diagnostics
Diagnostic
Name and
Source
AFD xA
Temperature
Sensor Warning

Affects
Target Severity
None

AFD 1A Voltage
Transient Protection None
Loss

RTAE-SVX001B-EN

Info

Info

Active Modes
[Inactive
Persistence Modes]
Criteria
NonLatch –
timed reset

NonLatch

Reset
Level

All

Any of the 3 IGBT modules (one per phase) has an open or
Local
out of range temperature sensor

All

Circuitry for respective AFD “Panel Interlock Warning” was
activated. For RTAE the panel interlock warning input
circuitry of AFD1A, is used to monitor the state of the entire
unit’s Surge Arresters, which is an array of 4 Metal Oxide
Varistors intended to protect the entire unit. An open state
of the circuit suggests at least one of the MOVs has opened
and the transient suppression protection is thereby
Local
compromised. Although the unit is not shutdown from this
warning diagnostic, it is highly recommended to replace the
protection MOVs as soon as practical, in order to protect
from further damage to the drives as a result of incoming
line transients. Even though the diagnostic has an AFD 1A
prefix, it applies to the entire unit

73

Diagnostics
Table 32. AFD diagnostics (continued)
Diagnostic
Name and
Source

Affects
Target Severity

Active Modes
[Inactive
Persistence Modes]
Criteria

Reset
Level

AFD xA 12-Pulse or
Auto Transf High
Circuit
Temp

Immediate

Latch

All

The emergency stop input of the respective AFD was
activated (open circuit has been detected). For RTAE units
with the Input Harmonic Distortion Option installed,
(TDD<5%), the respective drive’s Emergency Stop Fault
input circuitry is used to monitor and trip on the series
connected high limit thermostats of its associated 12-Pulse
Autotransformer. For 200, 230 & 575 V units, the same input
is used to monitor and trip on the series connected high limit
Local
thermostats of the Step-up/Step-down Voltage
Autotransformer. Both circuit diagnostics will occur in the
event of a high temperature trip of the Voltage
Autotransformer. A tripped (open) state of the circuit,
suggests an excessively high temperature of the respective
transformer– Check the glycol cooling loop, the control
panel ventilation or the Voltage Autotransformer panel
ventilation fan as applicable.

AFD xA A/D
Calibration Error

Immediate
(decel)

Latch

Starting

Before each start, the A/D converters are calibrated against
a known zero-voltage measurement. If the measurement
Local
reads more than 3% of full scale, the AFD asserts this A/D
Calibration Error diagnostic.

Circuit

AFD xA AHD
Frequency Out of
Range

Circuit

Info

NonLatch

Running

The input frequency for the Active Harmonic Damping
function of the respective AFD is outside the range 47 Hz <
Fin < 63 Hz for more than one minute. This diagnostic is Local
automatically reset when the input frequency returns to the
range 47 Hz < Fin < 63 Hz.

AFD xA AHD Sync
Signal Error

Circuit

Info

NonLatch

Running

The Active Harmonic Damping function of the respective
AFD is experiencing noise or glitching of the input line sync
Local
signal continuously for one minute. This diagnostic is
automatically reset when the condition clears.

AFD xA Bump
Failure

Circuit

Immediate

Latch

Bump Mode

During the compressor bump operation, the motor current
Local
exceeded Bump Cutout Current.

AFD xA Bus Over
Voltage

Circuit

Immediate

NonLatch

Holding, Running

Bus overvoltage indicated the high bus voltage cut out has
been exceeded while the AFD is in a non-stopped mode. The
Local
diagnostic will auto-reset when the bus voltage returns to its
normal range for 1 minute.

AFD xA Bus Under
Voltage

Circuit

Immediate
(decel)

NonLatch

Holding, Running

The bus voltage dropped below the Low Bus Cutout
threshold and there is not enough voltage to reliably operate
Local
the load. The diagnostic will auto-reset when the bus
voltage returns to its normal range for 1 minute.

AFD xA Bus Voltage
Circuit
Ripple Too High

Immediate

Latch

Running

The DC power bus voltage’s ripple exceeds the drive’s
capability to operate reliably.

AFD xA Comm Loss:
Circuit
Main Processor

Immediate
(decel)

Latch

All

The AFD detected a continual loss of communication with
the main processor for greater than the Communications Local
Loss Time (bound setpoint)

AFD xA Compressor
Circuit
Start Failure

Immediate

Latch

Starting

The compressor motor failed to start. This is most likely due
to load torque (possibly transients) exceeding the torque Local
capability.

AFD xA Current
Sensor Self Test
Failure

Circuit

Immediate

Latch

Starting

Self testing indicates a current sensor is not working. Either
it output is out of range or it significantly deviates from the Local
expected current trajectory on self-test

AFD xA
Desaturation
Detected

Circuit

Immediate

Latch

All

Output Short circuit sufficient to drive IGBT transistor gate
Local
into desaturation has been detected

AFD xA DSP Board
Circuit
ID Error

Immediate
(decel)

Latch

Power Up

Occurs when frame size identification does not match the
drive software. May occur upon DSP board replacement. Local
Requires rebinding.

AFD xA DSP Board
Circuit
Initialization Failure

Immediate
(decel)

Latch

Power Up

This results from address bus checking, data bus checking,
Local
line sync test, RAM test, each performed during the
initialization

AFD xA DSP Board
Circuit
Low Voltage Failure

Immediate

NonLatch

All

One of the AFD internal power supplies’ voltage has dropped
Local
below a reliable operation threshold

AFD xA DSP Board
Circuit
Over Temp

Immediate
(decel)

NonLatch

All

DSP board thermal switch indicates a temperature above
Local
85°C.

74

Local

RTAE-SVX001B-EN

Diagnostics
Table 32. AFD diagnostics (continued)
Diagnostic
Name and
Source

Affects
Target Severity

Active Modes
[Inactive
Persistence Modes]
Criteria

Reset
Level

AFD xA Estimated
Circuit
Junction Over Temp

Immediate
(decel)

Latch

Running

The AFD has exceeded the allowed IGBT junction
temperature. Suspect a problem with the Drive cooling
Local
system or if occurring during start acceleration, a damaged
and/or locked rotor compressor

AFD xA Excessive
AHD Inhibit

Info

Latch

All

The Active Harmonic Damping function of the respective
AFD is experiencing noise or glitching of the input line sync
Local
signal and has experienced 3 inhibits in one minute or 10
inhibits in one hour.

AFD xA Gate Drive
Circuit
Board Over Temp

Immediate
(decel)

NonLatch

All

Thermal switch on gate-drive board indicates its
temperature exceeds 99°C

Local

AFD xA Gate Drive
Circuit
Fault

Immediate

NonLatch

Running

Gate-drive board faults - One of the gate drive module
power supplies is out of range

Local

AFD xA Gate Drive
Circuit
Low Voltage Failure

Immediate

NonLatch

All

The 24Vdc gate drive supply to the gate drive module has
Local
dropped below a reliable operation threshold

AFD xA Gate Drive
Circuit
Module Comm Loss

Immediate
(decel)

Latch

All

Loss of communication between DSP module and Gate Drive
Local
Module

Circuit

AFD xA Gate Kill
Active

Circuit

Immediate

Latch

All

The respective drive’s gate-kill circuitry was activated (open
circuit). For RTAE, the respective compressor’s High
Pressure Cutout Switch is wired into this circuit, and will
cause an immediate shutdown of the drive and compressor Local
in the event of an HPC trip. A 2nd separate HPC diagnostic
will occur in conjunction with this diagnostic – see details of
the Main Processor Diagnostic “High Pressure Cutout” below

AFD xA General
Failure

Circuit

Immediate
(decel)

Latch

All

Drive fault other than those supported in this list.

Local

AFD xA Ground
Fault

Circuit

Immediate
(decel)

Latch

Running

Measured ground current exceeds ground current
sensitivity.

Local

AFD xA IGBT Self
Test Failure

Circuit

Immediate

Latch

Starting

Self testing indicates one or more IGBT’s is not working.

Local

AFD xA IMC 24V
Low Voltage

Circuit

Immediate
(decel)

NonLatch

All

Loss of 24V on the IMC/IPC machine bus has been detected
Local
by the AFD

AFD xA
Instantaneous
Current Overload

Circuit

Immediate

Latch

Running

The instantaneous current of any of the output phases
exceeded the drive capacity.

AFD xA Invalid Drive
Circuit
Command

Info

NonLatch

All

The AFD has reported that it had received a command for an
invalid state transition from the main processor (MP). This Local
diagnostic is not supported in 2.0 build

AFD xA Inverter
Circuit
Heatsink Over Temp

Immediate
(decel)

NonLatch

All

The IGBT heatsink temperature exceeded the cut out
temperature.

Local

Local

Immediate
(decel)

NonLatch

All

Circuitry for respective AFD “Panel Interlock Fault” was
activated. For RTAE units, the panel interlock fault input
circuitry is used to sense the state of the high limit
thermostat of its associated load inductors. A tripped (open) Local
state of the circuit, suggest a high temperature of the load
inductor – Check the glycol cooling loop and the control
panel ventilation

AFD xA Loss of AHD
Circuit
Sync Signal

Info

NonLatch

Running

The Active Harmonic Damping function of the respective
Local
AFD has received no valid input line sync signals for 1 minute

AFD xA Low Rotor
Flux Feedback

Circuit

Immediate
(decel)

Latch

Running

The estimated rotor flux dropped below the minimum
threshold

AFD xA Motor
Current Overload

Circuit

Immediate
(decel)

Latch

Running

Compressor Motor Overload “Time to Trip” vs Current curve
Local
exceeded

AFD xA Non-Volatile
Circuit
Memory Failure

Immediate
(decel)

Latch

Power Up

NV Memory does not pass CRC checks during initialization.
This fault will normally occur when firmware is upgraded, Local
and can be ignored and reset in that circumstance

AFD xA Output
Phase Loss

Circuit

Immediate
(decel)

Latch

Running

Drive sensed that an output phase is missing. Output phase
loss is defined as greater than 15% output current
Local
imbalance for more than 5.0 seconds.

AFD xA Over Speed Circuit

Immediate

Latch

All

The compressor motor’s speed either exceeded Absolute
Maximum Speed, or the drive has lost control.

AFD xA Load
Inductor High
Temperature

RTAE-SVX001B-EN

Circuit

Local

Local

75

Diagnostics
Table 32. AFD diagnostics (continued)
Diagnostic
Name and
Source

Active Modes
[Inactive
Persistence Modes]
Criteria

Affects
Target Severity

Reset
Level

AFD xA Rectifier
Circuit
Heatsink Over Temp

Immediate
(decel)

NonLatch

All

The diode heatsink temperature exceeded the cut out
temperature.

AFD xA Watchdog
Timer Overflow

Immediate

Latch

All

Watchdog timer overflowed. Requires power cycle to restore
Local
operation.

Circuit

Local

Main Processor Diagnostics
Table 33.

Main processor diagnostics

Diagnostic
Name

Affects
Target

BAS
Communication None
Lost

BAS Failed to
Establish
None
Communication

Severity

Special
Action

Special
Action

Active Modes
[Inactive
Persistence Modes]
Criteria

NonLatch

NonLatch

Reset
Level

All

The BAS was setup as “installed” at the MP and the Lontalk LCIC
lost communications with the BAS for 15 contiguous minutes
after it had been established. Refer to Section on Setpoint
Arbitration to determine how setpoints and operating modes
may be affected by the comm loss. The chiller follows the value
of the Tracer Default Run Command which can be previously Remote
written by Tracer and stored nonvolatilely by the MP (either use
local or shutdown). Note that this diagnostic is never
operational for BACnet Communication interface (BCI-C) and
only operational with a LonTalk Communication interface
(LCI-C) if so configured by the BAS or Tracer system.

At power-up

The BAS was setup as “installed” and the BAS did not
communicate with the Lontalk LCIC within 15 minutes after
chiller controls power-up. Refer to Section on Setpoint
Arbitration to determine how setpoints and operating modes
Remote
may be effected. Note that this diagnostic is never operational
for BACnet Communication interface (BCI-C) and only
operational with a LonTalk Communication interface (LCI-C) if
so configured by the BAS or Tracer system.

Info

Latch

All

The real time clock had detected loss of its oscillator at some
time in the past. Check / replace battery? This diagnostic can
be effectively cleared only by writing a new value to the chiller’s Remote
time clock using the TU or DynaView’s “set chiller time”
functions.

Condenser Fan
Inverter Fault - None
Ckt1

Info

NonLatch

All

A fault signal has been detected from at least one of the
Variable Speed Inverter Drive Condenser Fans of Circuit 1
(including the right hand fan of the Shared Fan Module if
present). No action is taken.

Remote

Condenser Fan
Inverter Fault - None
Ckt2

Info

NonLatch

All

A fault signal has been detected from at least one of the
Variable Speed Inverter Drive Condenser Fans of Circuit 2
(including the left hand fan of the Shared Fan Module if
present). No action is taken.

Remote

Condenser Rfgt
Pressure
Circuit
Transducer Ckt1

Immediate

Latch

All

Bad Sensor or LLID

Remote

Condenser Rfgt
Pressure
Circuit
Transducer Ckt2

Immediate

Latch

All

Bad Sensor or LLID

Remote

Discharge Rfgt
Temp Sensor – Circuit
Cprsr1A

Immediate

Latch

All

Bad Sensor or LLID

Remote

Discharge Rfgt
Temp Sensor – Circuit
Cprsr2A

Immediate

Latch

All

Bad Sensor or LLID

Remote

Drive Cooling
Supply Temp
Sensor – Ckt1

Normal

Latch

All

Bad Sensor or LLID.

Remote

Check Clock

76

Chiller

Circuit

RTAE-SVX001B-EN

Diagnostics
Table 33.

Main processor diagnostics (continued)

Severity

Active Modes
[Inactive
Persistence Modes]
Criteria

Reset
Level

Circuit

Normal

Latch

All

Bad Sensor or LLID.

Remote

Chiller

Immediate

Latch

All

EMERGENCY STOP input is open. An external interlock has
tripped. Time to trip from input opening to unit stop shall be 0.1 Local
to 1.0 seconds.

Evap Rfgt Pool
Special
Circuit and
Temp Sensor –
Action and
Chiller
Ckt1
Info

NonLatch

All

Bad Sensor or LLID. Note: The Evap Pool Temp Sensors are
used for evaporator freeze protection (running and nonrunning).

Remote

Evap Rfgt Pool
Special
Circuit and
Temp Sensor –
Action and
Chiller
Ckt2
Info

NonLatch

All

Bad Sensor or LLID. Note: The Evap Pool Temp Sensors are
used for evaporator freeze protection (running and nonrunning).

Remote

Ckt Energized
[Ckt Not
Energized

The evaporator refrigerant pool temperature sensor is
indicating a temperature significantly warmer than the
evaporator entering water temperature (by more than 7.2°F
for 5 continuous min excluding ckt nonoperation and a 2 min
ignore time relative to ckt startup). While this diagnostic is
Local
active, it will invalidate the evaporator pool temperature
sensor. Freeze protection functions (i.e. freeze diagnostics and
Evap Pump Override) will default to the respective evaporator
pressure transducer and its calculated saturation temperature.

Diagnostic
Name

Affects
Target

Drive Cooling
Supply Temp
Sensor – Ckt2
Emergency
Stop

Evap Rfgt Pool
Circuit
Temp Sensor
Error – Ckt1

Evap Rfgt Pool
Temp Sensor
Circuit
Error – Ckt2

Info and
Special
Action

Latch

Info and
Special
Action

Latch

Ckt Energized
[Ckt Not
Energized

The evaporator refrigerant pool temperature sensor is
indicating a temperature significantly warmer than the
evaporator entering water temperature (by more than 7.2°F
for 5 continuous min excluding ckt nonoperation and a 2 min
ignore time relative to ckt startup). While this diagnostic is
Local
active, it will invalidate the evaporator pool temperature
sensor. Freeze protection functions (i.e. freeze diagnostics and
Evap Pump Override) will default to the respective evaporator
pressure transducer and its calculated saturation temperature.

Evap Spillover
Liquid Level
Sensor – Ckt1

Circuit

Normal

Latch

All

Bad Sensor or LLID

Remote

Evap Spillover
Liquid Level
Sensor – Ckt2

Circuit

Normal

Latch

All

Bad Sensor or LLID

Remote

Evap Water
Flow (Entering None
Water Temp)

Evaporator
Approach Error Circuit
– Ckt1

Info

Immediate

NonLatch

The entering evaporator water temp fell below the leaving
evaporator water temp by more than 2°F for 180°F-sec,
Any Ckt
minimum trip time 30 seconds. It can warn of improper flow
Energized [No
direction through the evaporator, misbound water temperature Remote
Ckts Energized] sensors, improper sensor installation, partially failed sensors,
or other system problems. Note that either entering or leaving
water temp sensor or the water system could be at fault.

Latch

Respective
circuit running

The Evaporator approach temperature for the respective circuit
(ELWT – Evap Sat Temp Ckt 1) is negative by more than 10°F
for 1 minute continuously while the circuit / compressor is
Remote
operating. Either the Evap Leaving Water Temp sensor, or Evap
Suction Rfgt Pressure Transducer Ckt 1 is in error.
The Evaporator approach temperature for the respective circuit
(ELWT – Evap Sat Temp Ckt 2) is negative by more than 10°F
for 1 minute continuously while the circuit / compressor is
Remote
operating. Either the Evap Leaving Water Temp sensor, or Evap
Suction Rfgt Pressure Transducer Ckt 2 is in error.

Evaporator
Approach Error Circuit
– Ckt2

Immediate

Latch

Respective
circuit running

Evaporator
Entering Water Chiller
Temp Sensor

Normal

Latch

All

Bad Sensor or LLID. Note: Entering Water Temp Sensor is used
in EXV pressure control as well as ice making so it must cause Remote
a unit shutdown even if ice or CHW reset is not installed.

Evaporator
Leaving Water Chiller
Temp Sensor

Normal

Latch

All

Bad Sensor or LLID

NonLatch

a. The Evaporator water flow switch input was open for more
than 6 contiguous seconds (or 15 seconds for thermal
[All Stop modes] dispersion type flow switch). b. This diagnostic does not de- Remote
energize the evap pump output. c. 6 seconds of contiguous flow
shall clear this diagnostic.

Evaporator
Chiller
Water Flow Lost

RTAE-SVX001B-EN

Immediate

Remote

77

Diagnostics
Table 33.

Main processor diagnostics (continued)

Diagnostic
Name

Affects
Target

Severity

Active Modes
[Inactive
Persistence Modes]
Criteria

Reset
Level

Evaporator water flow was not proven within 20 minutes of the
Evaporator water pump relay being energized in normal “Stop”
to “Auto” transition. If the pump is overridden to “On” for
Remote
certain diagnostics, the delay on diagnostic callout shall be only
255 seconds. The pump command status will not be affected by
this diagnostic in either case.

Normal

NonLatch

Estab. Evap.
Water Flow on
going from STOP
to AUTO or Evap
Pump Override.

Excessive
Condenser
Circuit
Pressure – Ckt1

Immediate

Latch

All

The condenser pressure transducer of this circuit has detected
a condensing pressure in excess of the design high side
Remote
pressure as limited by the particular compressor type.

Excessive
Condenser
Circuit
Pressure – Ckt2

Immediate

Latch

All

The condenser pressure transducer of this circuit has detected
a condensing pressure in excess of the design high side
Remote
pressure as limited by the particular compressor type.

External
Chilled/Hot
None
Water Setpoint

Info

Latch

All

a. Function Not “Enabled”: no diagnostics. b. “Enabled “: OutOf-Range Low or Hi or bad LLID, set diagnostic, default CWS to Remote
next level of priority (e.g. Front Panel SetPoint).

External
Demand Limit
Setpoint

Info

Latch

All

a. Not “Enabled”: no diagnostics. b. “Enabled “: Out-Of-Range
Low or Hi or bad LLID, set diagnostic, default CLS to next level Remote
of priority (e.g. Front Panel SetPoint.

All

AFD 1A (controlling Compressor 1A) failed to respond in an
appropriate time with its status of Armed to Hold or Hold within
the allotted time of 1 minute of the sent command. (Arm to Local
Hold command sent; armed to Hold status received; Hold
command sent; Hold status received)

All

AFD 2A (controlling Compressor 2A) failed to respond in an
appropriate time with its status of Armed to Hold or Hold within
the allotted time of 1 minute of the sent command. (Arm to Local
Hold command sent; armed to Hold status received; Hold
command sent; Hold status received)

All

AFD 1A (controlling Compressor 1A) failed to arm or start
within the allotted time of 1 minute. (Arm to Start command
Local
sent; armed to Start status received; Start command sent;
Started status received)
AFD 2A (controlling Compressor 2A) failed to arm or start
within the allotted time of 1 minute. (Arm to Start command
Local
sent; armed to Start status received; Start command sent;
Started status received)

Evaporator
Water Flow
Overdue

Failure to Arm
or Hold - AFD
1A

Failure to Arm
or Hold - AFD
2A

Chiller

None

Circuit

Circuit

Failure to Arm
or Start - AFD
1A

Circuit

Failure to Arm
or Start - AFD
2A

Circuit

Info

Info

Nonlatch

Nonlatch

Immediate Latch

Immediate

Latch

All

High
Differential Rfgt Circuit
Pressure - Ckt1

Normal

Latch

Cprsr Energized
The differential pressure for the respective circuit was above
[Service/Op
Remote
275 Psid (1890 kPa) for 2 consecutive samples 5 seconds apart.
Pumpdown]

High
Differential Rfgt Circuit
Pressure - Ckt2

Normal

Latch

Cprsr Energized
The differential pressure for the respective circuit was above
[Service/Op
Remote
275 Psid (1890 kPa) for 2 consecutive samples 5 seconds apart
Pumpdown]

Latch

The compressor discharge temperature exceeded 200°F
(without oil cooler) or 230ºF (with oil cooler). This diagnostic
All [compressor will be suppressed during Stopping mode or after the
run unload or
compressor has stopped. Note: As part of the Compressor High
Remote
compressor not Temperature Limit Mode (aka Minimum Capacity Limit), the
running]
compressor shall be forced loaded as the filtered discharge
temperature reaches 190ºF (without oil coolers), or 220ºF
(with oil coolers).

Latch

The compressor discharge temperature exceeded 200°F
(without oil cooler) or 230ºF (with oil cooler). This diagnostic
All [compressor will be suppressed during Stopping Mode or after the
run unload or
compressor has stopped. Note: As part of the Compressor High
Remote
compressor not Temperature Limit Mode (aka Minimum Capacity Limit), the
running]
compressor shall be forced loaded as the filtered discharge
temperature reaches 190ºF (without oil coolers), or 220ºF
(with oil coolers).

High Discharge
Temperature – Circuit
Cprsr1A

High Discharge
Temperature – Circuit
Cprsr2A

78

Immediate

Immediate

RTAE-SVX001B-EN

Diagnostics
Table 33.

Main processor diagnostics (continued)

Diagnostic
Name

High
Evaporator
Refrigerant
Pressure

Affects
Target

Chiller

Severity

Immediate

Active Modes
[Inactive
Persistence Modes]
Criteria

NonLatch

Reset
Level

All

The evaporator refrigerant pressure of either circuit has risen
above 190 psig. The evaporator water pump relay will be deenergized to stop the pump regardless of why the pump is
running. The diagnostic will auto reset and the pump will return
to normal control when all of the evaporator pressures fall
below 185 psig. The primary purpose is to stop the evaporator Remote
water pump and its associated pump heat from causing
refrigerant side pressures, close to the evaporator relief valve
setting, when the chiller is not running, such as could occur with
Evap Water Flow Overdue or Evaporator Water Flow Loss
Diagnostics.
Either the leaving or the entering water temperature exceeded
the high evap water temp limit (TV service menu settable –
default 105°F) for 15 continuous seconds. The evaporator
water pump relay will be de-energized to stop the pump but
only if it is running due one of the diagnostics listed on the left
. The diagnostic will auto reset and the pump will return to
normal control when both the entering and leaving
temperatures fall 5°F below the trip setting. The primary
Remote
purpose is to stop the evaporator water pump and its
associated pump heat from causing excessive waterside
temperatures and waterside pressures when the chiller is not
running but the evap pump is on due to either Evap Water Flow
Overdue, Evaporator Water Flow Loss, or Low Evap Temp – Unit
Off Diagnostics. This diagnostic will not auto clear solely due to
the clearing of the enabling diagnostic.

Info and
Special
Action

NonLatch

Only effective if
either 1)Evap
Wtr Flow
Overdue, 2)Evap
Wtr Flow Loss, or
3)Low Evap Rfgt
Temp,-Unit Off,
diagnostic is
active.

High Motor
Winding
Circuit
Temperature Cprsr1A

Immediate

Latch

All

Any of the compressor’s motor winding temperature sensors is
seen to be beyond the windings rated temperature of 265°F Local
(129.4°C)

High Motor
Winding
Circuit
Temperature Cprsr2A

Immediate

Latch

All

Any of the respective compressor’s motor winding temperature
sensors is seen to be beyond the windings rated temperature Local
of 265°F (129.4°C)

High Pressure
Cutout Cprsr1A

Circuit

Immediate

Latch

All

A high pressure cutout was detected by AFD 1A Gate Kill Input
Local
; trip at 315 ± 5 PSIG.

High Pressure
Cutout Cprsr2A

Circuit

Immediate

Latch

All

A high pressure cutout was detected by AFD 2A Gate Kill Input
Local
; trip at 315 ± 5 PSIG.

High
Refrigerant
Circuit
Pressure Ratio
– Ckt1

Immediate

Latch

The pressure ratio for the respective circuit exceeded 12.3 for
Cprsr Energized 1 contiguous minute while running in any mode. The pressure Remote
ratio is defined as Pcond (abs)/Pevap(abs).

High
Refrigerant
Circuit
Pressure Ratio
– Ckt2

Immediate

Latch

The pressure ratio for the respective circuit exceeded 12.3 for
Cprsr Energized 1 contiguous minute while running in any mode. The pressure Remote
ratio is defined as Pcond (abs)/Pevap(abs).

High
Evaporator
Water
Temperature

Chiller

Interrupt
Circuit
Failure – AFD1A

RTAE-SVX001B-EN

Immediate
Shutdown
Latch
and Special
Action

Respective AFD is reporting that it is still running the
compressor when the MP has commanded the drive/
compressor to be Off. Detection time shall be 10 seconds
minimum and 15 seconds maximum. On detection and until the
controller is manually reset: this diagnostic shall be active and
AFD intended to
the alarm relay shall be energized, the Evap Pump Output will Local
be OFF
be energized, the effected compressor will be continually
commanded off, and be unloaded, while a normal stop shall be
commanded to all other compressors. For as long as
compressor operation continues, the MP shall continue liquid
level, oil return, and fan control on the circuit effected.

79

Diagnostics
Table 33.

Main processor diagnostics (continued)

Diagnostic
Name

Affects
Target

Severity

Active Modes
[Inactive
Persistence Modes]
Criteria

Reset
Level

Interrupt
Circuit
Failure – AFD2A

Immediate
Shutdown
Latch
and Special
Action

Respective AFD is reporting that it is still running the
compressor when the MP has commanded the drive/
compressor to be Off. Detection time shall be 10 seconds
minimum and 15 seconds maximum. On detection and until the
controller is manually reset: this diagnostic shall be active and
AFD intended to
the alarm relay shall be energized, the Evap Pump Output will Local
be OFF
be energized, the effected compressor will be continually
commanded off, and be unloaded, while a normal stop shall be
commanded to all other compressors. For as long as
compressor operation continues, the MP shall continue liquid
level, oil return, and fan control on the circuit effected.

LCI-C Software
Mismatch: Use Chiller
BAS Tool

Info

Nonlatch

All

The neuron software in the LCI-C module does not match the
chiller type. Download the proper software into the LCI-C
Remote
neuron. To do this, use the Rover service tool, or a LonTalk®
tool capable of downloading software to a Neuron 3150®.

Loss of Oil
(Running) Cprsr1A

Circuit

Immediate

Latch

Starter
Contactor
Energized

In running modes, Oil Loss Level Sensor detects lack of oil in
the oil sump feeding the compressor (distinguishing a liquid Local
flow from a vapor flow).

Loss of Oil
(Running) Cprsr2A

Circuit

Immediate

Latch

Starter
Contactor
Energized

In running modes, Oil Loss Level Sensor detects lack of oil in
the oil sump feeding the compressor (distinguishing a liquid Local
flow from a vapor flow).

Circuit

Immediate
Shutdown
Latch
and Special
Action

Oil Loss Level Sensor detects a lack of oil in the oil sump feeding
Compressor Pre- the compressor for 90 seconds after EXV preposition is
start [all other completed on an attempted circuit start. Note: Compressor Local
modes]
start is delayed pending oil detection during that time, but not
allowed once the diagnostic occurs.

Circuit

Immediate
Shutdown
Latch
and Special
Action

Oil Loss Level Sensor detects a lack of oil in the oil sump feeding
Compressor Pre- the compressor for 90 seconds after EXV preposition is
start [all other completed on an attempted circuit start. Note: Compressor Local
modes]
start is delayed pending oil detection during that time, but not
allowed once the diagnostic occurs.

Immediate

Latch

The system differential pressure (Pc-Pe) for the respective
circuit was below 25 psid (240.5 kPa) or the pressure ratio (Pc/
Pe) was less than 1.1 while the compressor is running for a
Cprsr Energized
Remote
period of time dependent on the deficit (15 sec ignore time
from circuit start). Refer to the Oil Flow Protection specification
for the time to trip function.

Latch

The system differential pressure (Pc-Pe) for the respective
circuit was below 25 psid (240.5 kPa) or the pressure ratio (Pc/
Pe) was less than 1.1 while the compressor is running for a
Cprsr Energized
Remote
period of time dependent on the deficit (15 sec ignore time
from circuit start). Refer to the Oil Flow Protection specification
for the time to trip function.
While Running Normally, the Discharge Superheat was less
than 9 degrees F for more than 4878 degree F seconds. At
Remote
circuit startup, the Discharge Superheat will be ignored for 5
minutes.

Loss of Oil
(Stopped) –
Cprsr1A

Loss of Oil
(Stopped) –
Cprsr2A

Low Differential
Rfgt Pressure - Circuit
Ckt1

Low Differential
Rfgt Pressure - Circuit
Ckt2

Immediate

Low Discharge
Superheat –
Circuit
Ckt1

Normal

Latch

Any Running
Mode

Low Discharge
Superheat –
Circuit
Ckt2

Normal

Latch

Any Running
Mode

While Running Normally, the Discharge Superheat was less
than 9 degrees F for more than 4878 degree F seconds. At
Remote
circuit startup, the Discharge Superheat will be ignored for 5
minutes.

Cprsr Prestart
and Cprsr
Energized

a. The Evap Refrig Pressure dropped below 10 Psia just prior to
compressor start (after EXV preposition).
b. During Early Startup Period: the Evap Refrig Pressure fell
below a pressure equal to Condenser Pressure ÷ 8 but as
limited to not less than 6 or greater than 10 psia.
Local
c. After Early Startup Period expires: The Evap Refrig Pressure
fell below 16 Psia for 30 seconds or below 10 psia for 5 seconds.
(Note: the Early Startup Period for RTAE it is between 1 and 5
min as an inverse function of the Cond Temp measured at time
of circuit startup).

Low Evaporator
Rfgt Pressure - Circuit
Ckt1

80

Immediate

Latch

RTAE-SVX001B-EN

Diagnostics
Table 33.

Main processor diagnostics (continued)

Diagnostic
Name

Affects
Target

Low Evaporator
Rfgt Pressure - Circuit
Ckt2

Low Evaporator
Rfgt
Circuit
Temperature Ckt1

Low Evaporator
Rfgt
Circuit
Temperature Ckt2

Severity

Immediate

Immediate

Immediate

Low Evaporator
Info and
Temp (Unit Off) Evap Pump Special
– Ckt1
Action

Low Evaporator
Special
Temp (Unit Off) Evap Pump
Action
– Ckt2

RTAE-SVX001B-EN

Active Modes
[Inactive
Persistence Modes]
Criteria

Latch

Latch

Cprsr Prestart
and Cprsr
Energized

All Ckt Running
Modes [Service
Pumpdown]

Reset
Level

a. The Evap Refrig Pressure dropped below 10 Psia just prior to
compressor start (after EXV preposition).
b. During Early Startup Period: the Evap Refrig Pressure fell
below a pressure equal to Condenser Pressure ÷ 8 but as
limited to not less than 6 or greater than 10 psia.
Local
c. After Early Startup Period expires: The Evap Refrig Pressure
fell below 16 Psia for 30 seconds or below 10 psia for 5 seconds.
(Note: the Early Startup Period for RTAE it is between 1 and 5
min as an inverse function of the Cond Temp measured at time
of circuit startup).
The warmer of either the Evaporator Refrigerant Pool
Temperature or the Evaporator Saturated Temperature for the
respective circuit, dropped below the Low Refrigerant
Temperature Cutout Setpoint for 2250 F-sec (12 F-sec/sec
max rate for early circuit startup period) while the circuit was
Remote
running. The minimum LERTC setpoint is -5 F the point at
which oil separates from the refrigerant. The integral is held
nonvolatily though power down, is continuously calculated, and
can decay or build during the circuit’s off cycle as conditions
warrant.
The warmer of either the Evaporator Refrigerant Pool
Temperature or the Evaporator Saturated Temperature for the
respective circuit, dropped below the Low Refrigerant
Temperature Cutout Setpoint for 2250°F-sec (12°F-sec/sec
max rate for early circuit startup period) while the circuit was
Remote
running. The minimum LERTC setpoint is -5°F the point at
which oil separates from the refrigerant. The integral is held
nonvolatily though power down, is continuously calculated, and
can decay or build during the circuit’s off cycle as conditions
warrant.

Latch

All Ckt Running
Modes [Service
Pumpdown]

NonLatch

The respective circuit’s “Chiller Off Cycle Freeze Protection
Integral” was seen to be higher than ½ of its trip value while
the chiller is in the Stop mode, or in Auto mode with no
compressors running, for one minute and more. The COCFP
integral is increased if the Average of the Evap Water
Unit in Stop
Temperature and the Evap Refrigerant Pool Temp is below the
Mode, or in Auto value of the Low Evap Rfgt Temp Cutout + 4°F. Energize Evap
Mode and No
Water Pump and Off-Cycle Freeze Avoidance Request Relay
Remote
Ckt's Energzd
until diagnostic auto resets, then return to normal evap pump
[Any Ckt
control and de-energize the Freeze Avoidance Request.
Energzd]
Automatic reset occurs when the respective Evap Rfgt Pool
Temp rises 2°F (1.1°C) above the LERTC cutout setting and the
COCFP Integral is less than 1/3 of its trip value. This diagnostic
even while active, does not prevent operation of either circuit.
(At each circuit shutdown, the COCFP integral is initialized to
the LERTC integral).

NonLatch

The respective circuit’s “Chiller Off Cycle Freeze Protection
Integral” was seen to be higher than ½ of its trip value while
the chiller is in the Stop mode, or in Auto mode with no
compressors running, for one minute and more. The COCFP
integral is increased if the Average of the Evap Water
Unit in Stop
Temperatures and the Evap Refrigerant Pool Temp is below the
Mode, or in Auto value of the Low Evap Rfgt Temp Cutout + 4°F. Energize Evap
Mode and No
Water Pump and Off-Cycle Freeze Avoidance Request Relay
Remote
Ckt's Energzd
until diagnostic auto resets, then return to normal evap pump
[Any Ckt
control and de-energize the Freeze Avoidance Request.
Energzd]
Automatic reset occurs when the respective Evap Rfgt Pool
Temp rises 2°F (1.1°C) above the LERTC cutout setting AND
the COCFP Integral is less than 1/3 of its trip value. This
diagnostic even while active, does not prevent operation of
either circuit. (At each circuit shutdown, the COCFP integral is
initialized to the LERTC integral).

81

Diagnostics
Table 33.

Main processor diagnostics (continued)

Diagnostic
Name

Affects
Target

Severity

Low Oil Flow Cprsr2A

Low Oil Flow Cpsr 1A

Circuit

Circuit

Low Oil Return
or AFD Cooling Circuit
– Ckt1

Reset
Level

NonLatch

Either the entering or leaving evaporator water temp fell below
the leaving water temp cutout setting for 30°F-seconds while
Unit in Stop
the Chiller is in the Stop mode, or in Auto mode with no
Mode, or in Auto compressors running. Energize Freeze Avoidance Request
Mode and No
Relay and Evap Water Pump Relay until diagnostic auto resets,
Remote
Ckt(s) Energzd then de-energize the Freeze Avoidance Request Relay and
[Any Ckt
return to normal evap pump control. Automatic reset occurs
Energzd]
when both temps rise 2°F (1.1°C) above the cutout setting for
5 minutes, or either circuit starts. This diagnostic even while
active, does not prevent operation of either circuit.

Immediate
Shutdown
NonLatch
and Special
Action

The evaporator entering or leaving water temp fell below the
cutout setpoint for 30°F-seconds while the compressor was
Any Ckt[s]
running. Automatic reset occurs when both of the temperature
Energzd [No
Remote
rises 2°F (1.1°C) above the cutout setting for 2 minutes. This
Ckt(s) Energzd]
diagnostic shall not de-energize the Evaporator Water Pump
Output.

Immediate

Latch

The oil pressure transducer for this compressor was indicating
an unacceptable oil pressure drop as a % of the available oil
Cprsr Energized
pressure to move oil, suggesting significantly reduced oil flow
and Delta P
Local
to the compressor. Possible root causes include oil line service
above 15 Psid
valve closed or restricted, dirty or restricted oil filter, or
compressor oil line kepner valve malfunction.

Latch

The oil pressure transducer for this compressor was indicating
an unacceptable oil pressure drop as a % of the available oil
Cprsr Energized
pressure to move oil, suggesting significantly reduced oil flow
and Delta P
Local
to the compressor. Possible root causes include oil line service
above 15 Psid
valve closed or restricted, dirty or restricted oil filter, or
compressor oil line kepner valve malfunction.

Evap Pump
Low Evaporator and Freeze Info and
Water Temp
Avoidance Special
(Unit Off)
Request
Action
Relay

Low Evaporator
Water Temp:
Chiller
Unit On

Active Modes
[Inactive
Persistence Modes]
Criteria

Immediate

Info

NonLatch

All Ckt Running
Modes

The evaporator’s spillover tank refrigerant liquid level, which
feeds the oil return and drive cooling heat exchanger, is seen
to be less than 90% of its min level for 20 continuous minutes
– reset when level gets to 88% of min level. The occurrence of
this warning in conjunction with the “Loss of Oil (Running)” or
any of the” AFD Over Temp” shutdown diagnostics, suggests
either EXV problems or loss of charge is a contributing factor.

All Ckt Running
Modes

The evaporator’s spillover tank refrigerant liquid level, which
feeds the oil return and drive cooling heat exchanger, is seen
to be less than 90% of its min level for 20 continuous minutes
– reset when level gets to 88% of min level. The occurrence of
this warning in conjunction with the “Loss of Oil (Running)” or
any of the” AFD Over Temperature” shutdown diagnostics,
suggests either EXV problems or loss of charge is a contributing
factor.

Low Oil Return
or AFD Cooling Circuit
– Ckt2

Info

Motor Winding
Temp Sensor - Circuit
Cprsr1A

Info or None Latch

All

Both of the motor winding temperature sensors are seen to be
out of their normal range. (Severity is adjustable via TU Service Local
Tool – default is Info)

Motor Winding
Temp Sensor- Circuit
Cprsr2A

Info or None Latch

All

Both of the motor winding temperature sensors are seen to be
out of their normal range. (Severity is adjustable via TU Service Local
Tool – default is Info)

MP Application
Memory CRC
Chiller
Error

Immediate

Latch

All Modes

Memory error criteria TBD

MP: Could not
Store Starts
and Hours

None

Info

Latch

All

MP has determined there was an error with the previous power
down store. Starts and Hours may have been lost for the last Remote
24 hours.

MP: Invalid
Configuration

None

Immediate

Latch

All

MP has an invalid configuration based on the current software
Remote
installed.

MP: NonVolatile
Memory
Reformat

None

Info

Latch

All

MP has determined there was an error in a sector of the NonRemote
Volatile memory and it was reformatted. Check settings.

82

NonLatch

Remote

RTAE-SVX001B-EN

Diagnostics
Table 33.

Main processor diagnostics (continued)

Diagnostic
Name

Affects
Target

Severity

Active Modes
[Inactive
Persistence Modes]
Criteria

Reset
Level

MP: Reset Has
None
Occurred

Info

NonLatch

All

The main processor has successfully come out of a reset and
built its application. A reset may have been due to a power up,
or a power loss of a minimum or longer duration to cause an
MP power down reset, or when installing new software or
Remote
defining a new configuration. This diagnostic is immediately
and automatically cleared and thus can only be seen in the
Historic Diagnostic List in TU.

No Differential
Rfgt Pressure – Circuit
Ckt1

Immediate

Latch

Compressor
running on
Circuit

The system differential pressure was below 7.7 Psid (53 kPa)
for 6 seconds after the 11 seconds ignore time relative to cprsr/ Remote
circuit startup had expired.

No Differential
Rfgt Pressure – Circuit
Ckt2

Immediate

Latch

Compressor
running on
Circuit

The system differential pressure was below 7.7 Psid (53 kPa)
for 6 seconds after the 11 seconds ignore time relative to cprsr/ Remote
circuit startup had expired.

Oil Analysis
Recommended Circuit
– Ckt1

Info

Latch

“Service
Messages”
enabled

Diagnostic occurs when accumulated circuit operating hours
since last initialized exceeds 2000 hours. Diagnostic can be
Remote
manually cleared but will reoccur every month (720 hours on
real time clock) as long as accumulator is not re-initialized.

Oil Analysis
Recommended Circuit
– Ckt2

Info

Latch

“Service
Messages”
enabled

Diagnostic occurs when accumulated circuit operating hours
since last initialized exceeds 2000 hours. Diagnostic can be
Remote
manually cleared but will reoccur every month (720 hours on
real time clock) as long as accumulator is not re-initialized.

Latch

“Service
Messages”
enabled

Diagnostic occurs only when “service messages” are enabled
and when average oil pressure drop exceeds 18%. Diagnostic
can be manually cleared but will reoccur every month (720 Remote
hours on real time clock) as long as average pressure drop does
not fall below 16%.
Diagnostic occurs only when “service messages” are enabled
and when average oil pressure drop exceeds 18%. Diagnostic
can be manually cleared but will reoccur every month (720 Remote
hours on real time clock) as long as average pressure drop does
not fall below 16%.

Oil Filter
Change
Circuit
Recommended
– Cprsr1A

Info

Oil Filter
Change
Circuit
Recommended
– Cprsr2A

Info

Latch

“Service
Messages”
enabled

Oil Flow
Protection Fault Circuit
– Ckt 1

Immediate

Latch

Starter
Contactor
Energized [all
Stop modes]

The Intermediate Oil Pressure Transducer for this cprsr is
reading a pressure either above its respective circuit’s
Local
Condenser Pressure by 15 Psia or more, or below its respective
Suction Pressure 10 Psia or more for 30 seconds continuously.
The Intermediate Oil Pressure Transducer for this cprsr is
reading a pressure either above its respective circuit’s
Local
Condenser Pressure by 15 Psia or more, or below its respective
Suction Pressure 10 Psia or more for 30 seconds continuously.

Oil Flow
Protection Fault Circuit
– Ckt2

Immediate

Latch

Starter
Contactor
Energized [all
Stop modes]

Oil Pressure
Transducer –
Cprsr1A

Circuit

Immediate

Latch

All

Bad Sensor or LLID

Remote

Oil Pressure
Transducer –
Cprsr2A

Circuit

Immediate

Latch

All

Bad Sensor or LLID

Remote

Outdoor Air
Temperature
Sensor

Chiller

Normal
Shutdown;

Latch

All

Bad Sensor or LLID. If this diagnostic occurs, operational
pumpdown will be performed regardless of the last valid
temperature.

Remote

Pumpdown
Terminated Ckt1

Circuit

Info

NonLatch

Service
Pumpdown

Service Pumpdown cycle for this circuit was terminated
abnormally due to excessive time.(RTAE max Service
Pumpdown = 4 min).

Local

Pumpdown
Terminated Ckt2

Circuit

Info

NonLatch

Service
Pumpdown

Service Pumpdown cycle for this circuit was terminated
abnormally due to excessive. (RTAE max Service Pumpdown = Local
4 min).

All

A high level software watchdog has detected a condition in
which there was a continuous 1 minute period of compressor
operation, with neither Evaporator water flow nor a” contactor
interrupt failure” diagnostic active. The presence of this
Local
software error message suggests an internal software problem
has been detected. The events that led up to this failure, if
known, should be recorded and transmitted to Trane Controls
Engineering.

Software Error
All
1001: Call
functions
Trane Service

RTAE-SVX001B-EN

Immediate

Latch

83

Diagnostics
Table 33.

Main processor diagnostics (continued)

Diagnostic
Name

Affects
Target

Software Error
All
1002: Call
functions
Trane Service

Severity

Immediate

Active Modes
[Inactive
Persistence Modes]
Criteria

Latch

Reset
Level

All

Reported if state chart misalignment in stopped or inactive
state occurred while a compressor was seen to be operating
and this condition lasted for at least 1 minute (cmprsr operation
due to Service Pumpdown or with Contactor Interrupt Failure
Local
diagnostic is excluded). The presence of this software error
message suggests an internal software problem has been
detected. The events that led up to this failure, if known, should
be recorded and transmitted to Trane Controls Engineering.

Software Error
All
1003: Call
functions
Trane Service

Immediate

Latch

All

Reported if state chart misalignment occurred inferred from
either Capacity Control, Circuit, or Compressor State Machines
remaining in the Stopping state for more than 3 minutes. The
presence of this software error message suggests an internal Local
software problem has been detected. The events that led up to
this failure, if known, should be recorded and transmitted to
Trane Controls Engineering.

Starts or Hours
Modified –
None
Cprsr1A

Info

NonLatch

All

The current value for the cumulative starts and or hours for the
given compressor have been modified by a write override from NA
TU.

Starts or Hours
Modified –
None
Cprsr2A

Info

NonLatch

All

The current value for the cumulative starts and or hours for the
given compressor have been modified by a write override from NA
TU.

Suction Rfgt
Pressure
Transducer –
Cprsr1A

Circuit

Immediate

Latch

All

Bad Sensor or LLID

Remote

Suction Rfgt
Pressure
Transducer –
Cprsr2A

Circuit

Immediate

Latch

All

Bad Sensor or LLID

Remote

Nonlatch

All Cprsr Running
modes, Starting,
Running and
Preparing to
Shutdown

The respective AFD status reported back that it is stopped when
the MP thinks it should be running and no AFD shutdown
diagnostic exists. This diagnostic will be logged in the active
Remote
buffer and then automatically cleared. This diagnostic could be
caused by intermittent communication problems from the AFD
to the MP, or due to misbinding.

Nonlatch

All Cprsr Running
modes, Starting,
Running and
Preparing to
Shutdown

The respective AFD status reported back that it is stopped when
the MP thinks it should be running and no AFD shutdown
diagnostic exists. This diagnostic will be logged in the active
Remote
buffer and then automatically cleared. This diagnostic could be
caused by intermittent communication problems from the AFD
to the MP, or due to misbinding.

All

The respective circuit’s evaporator pressure dropped below
80% of the current Low Evap Refrig Press Cutout setting (see
above) or 8 psia, whichever is less, regardless of the running
state of the circuit’s compressor. Note: Unlike previous
Local
products, even if the circuit associated with the suction
pressure transducer is locked out, it will not defeat the
protection afforded by this diagnostic.

All

The respective circuit’s evaporator pressure dropped below
80% of the current Low Evap Refrig Press Cutout setting (see
above) or 8 psia, whichever is less, regardless of the running
Local
state of the circuit’s compressor. Note: Unlike previous
products, even if the circuit associated with the suction
pressure transducer is locked out, it will not defeat the
protection afforded by this diagnostic.

Unexpected
Shutdown –
AFD1A

Unexpected
Shutdown –
AFD2A

Circuit

Circuit

Very Low
Evaporator Rfgt Chiller
Pressure – Ckt1

Very Low
Evaporator Rfgt Chiller
Pressure – Ckt2

84

Normal

Normal

Immediate

Immediate

Latch

Latch

RTAE-SVX001B-EN

Diagnostics

Communication Diagnostics
Notes:
• The following communication loss diagnostics will not
occur unless that input or output is required to be
present by the particular configuration and installed
options for the chiller.
•

Communication diagnostics are named by the
Functional Name of the input or output that is no
longer being heard from by the Main Processor. Many
LLIDs, such as the Quad Relay LLID, have more than

Table 34.

one functional output associated with it. A comm loss
with such a multiple function board, will generate
multiple diagnostics. Refer to the Chiller's wiring
diagrams to relate the occurrence of multiple
communication diagnostics back to the physical LLID
boards that they have been assigned to (bound).

Communication diagnostics

Diagnostic
Name

Affects
Target

Active Modes
[Inactive
Severity Persistence Modes]
Criteria

Reset
Level

Comm Loss: AFD 1A Circuit

Immediate NonLatch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: AFD 2A Circuit

Immediate NonLatch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Chiller
None
% Capacity Output

Info

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Latch

Comm Loss: Cond
Fan Enable, Shared None
Ckt1&2

Info

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. This is an
info warning, as it is conceivable that the circuit may run Remote
without the center shared fan deck working if there are many
other coils/fans on the circuits.

Comm Loss: Cond
Circuit
Rfgt Pressure, Ckt1

Immediate Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Cond
Circuit
Rfgt Pressure, Ckt2

Immediate Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Condenser Fan
Enable, Ckt1

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Condenser Fan
Enable, Ckt2

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Discharge
Circuit
Temperature, Ckt1

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Discharge
Circuit
Temperature, Ckt2

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Drive
Cooling BP Valve,
Ckt1

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Drive
Cooling BP Valve,
Ckt2

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Drive
Cooling IL Valve,
Ckt1

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Drive
Cooling IL Valve,
Ckt2

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Drive
Cooling Sply Temp, Circuit
Ckt1

Norma

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. While this
Remote
diagnostic is active, the associated Drive Cooling ByPass
Valve shall be commanded fully closed.

Comm Loss: Drive
Cooling Sply Temp, Circuit
Ckt2

Norma

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. While this
Remote
diagnostic is active, the associated Drive Cooling ByPass
Valve shall be commanded fully closed

RTAE-SVX001B-EN

85

Diagnostics
Table 34.

Communication diagnostics (continued)

Diagnostic
Name

Affects
Target

Active Modes
[Inactive
Severity Persistence Modes]
Criteria

Comm Loss:
Emergency Stop

Chiller

Normal

Comm Loss: Evap
Rfgt Pool Temp,
Ckt1

Special
Circuit and
Action and Latch
Chiller
Info

Comm Loss: Evap
Rfgt Pool Temp,
Ckt2

Special
Circuit and
Action and Latch
Chiller
Info

Latch

Reset
Level

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period Note: The
Evap Pool Temp Sensors are used for both On and Off -cycle Remote
freeze protection. Substitute Suction Pressure to
Temperature conversion for freeze protection functions.

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period Note: The
Evap Pool Temp Sensors are used for both On and Off -cycle Remote
freeze protection. Substitute Suction Pressure to
Temperature conversion for freeze protection functions.

Remote

Comm Loss:
Evaporator Entering Chiller
Water Temperature

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Note:
Entering Water Temp Sensor is used in EXV pressure control Remote
as well as ice making & CHW reset, so it must cause a unit
shutdown even if Ice or CHW reset is not installed.

Comm Loss:
Evaporator Leaving Chiller
Water Temperature

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Evaporator Rfgt
Liquid Level, Ckt1

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Evaporator Rfgt
Liquid Level, Ckt2

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Evaporator Water
Flow Switch

Chiller

Immediate Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Evaporator Water
Pump Relay

Chiller

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Expansion Valve,
Ckt1

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Expansion Valve,
Ckt2

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Ext
Noise Reduction
Command

None

Info

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Chiller
External Auto/Stop

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

External
Comm Loss:
Chilled
External Chilled/Hot
Water
Water Setpoint
Setpoint

Special
Action

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Chiller
shall discontinue use of the External Chilled Water Setpoint Remote
source and revert to the next higher priority for setpoint
arbitration

Comm Loss:
External Ckt
Lockout, Ckt1

Info

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. MP will
Remote
hold the last lockout state (enabled or disabled) that was in
effect at the time of comm loss.

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. MP will
Remote
hold the last lockout state (enabled or disabled) that was in
effect at the time of comm loss

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Chiller
shall discontinue use of the External Current limit setpoint Remote
and revert to the next higher priority for Current Limit
setpoint arbitration

None

Comm Loss:
External Ckt
Lockout, Ckt2

None

Info

Comm Loss:
External Demand
Limit Setpoint

External
Current
Limit
setpoint

Special
Action

86

Latch

Latch

RTAE-SVX001B-EN

Diagnostics
Table 34.

Communication diagnostics (continued)

Diagnostic
Name

Affects
Target

Active Modes
[Inactive
Severity Persistence Modes]
Criteria

Reset
Level

Comm Loss:
Ice Making Special
External Ice
Mode
Action
Building Command

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Chiller
Remote
shall revert to normal (non-ice building) mode regardless of
last state.

Comm Loss: Fan
None
Inverter Fault, Ckt1

Info

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period

Remote

Comm Loss: Fan
None
Inverter Fault, Ckt2

Info

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Fan
Inverter Speed
Cmd, Ckt1

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Fan
Inverter Speed
Cmd, Ckt2

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. This is an
info warning, as it is conceivable that the circuit may run
without the center shared fan deck working if there are many
other coils/fans on the circuits.

Comm Loss: Heat/
Special
Heat Mode
Cool Switch
Action

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Chiller
Remote
shall revert to normal (non-ice building) mode regardless of
last state.

Comm Loss: IceMaking Status

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Chiller
Remote
shall revert to normal (non-ice building) mode regardless of
last state.

Comm Loss: Fan
Inverter Speed
Cmd, Shared
Ckt1&2

None

IceMachine

Info

Special
Action

Comm Loss: Local
BAS Interface

Chiller

Info

NonLatch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Use last
valid BAS setpoints. Diagnostic is cleared when successful Remote
communication is established with the LonTalk LLID (LCIC)
or BACnet LLID (BCIC).

Comm Loss: Offcycle Freeze
Protection Relay

Chiller

Info

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Oil
Loss Level Sensor
Input – Ckt1

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Oil
Loss Level Sensor
Input – Ckt2

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Oil
Pressure, Cprsr1A

Circuit

Immediate Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Oil
Pressure, Cprsr2A

Circuit

Immediate Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss: Op
Status
Programmable
Relays

None

Info

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period.

Remote

Comm Loss:
Outdoor Air
Temperature

Chiller

Normal
Latch
Shutdown

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. For RTAE
Remote
if this diagnostic occurs, operational pumpdown will be
performed regardless of the last valid temperature

Comm Loss:
Suction Rfgt
Pressure, Ckt1

Circuit

Immediate Latch

All [Ckt/Cprsr
lock out]

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Note: This Remote
diagnostic is replaced by diagnostic 5FB below with Rev 15.0

Comm Loss:
Suction Rfgt
Pressure, Ckt2

Circuit

Immediate Latch

All [Ckt/Cprsr
lock out]

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period. Note: This Remote
diagnostic is replaced by diagnostic 5FD below with Rev 15.0

RTAE-SVX001B-EN

87

Diagnostics
Table 34.

Communication diagnostics (continued)

Diagnostic
Name

Affects
Target

Active Modes
[Inactive
Severity Persistence Modes]
Criteria

Comm Loss:
Winding Temp 1,
Cprsr1A

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period

Remote

Comm Loss:
Winding Temp 1,
Cprsr2A

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period

Remote

Comm Loss:
Winding Temp 2,
Cprsr2A

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period

Remote

Comm Loss:
Winding Temp 2,
Cprsr1A

Circuit

Normal

Latch

All

Continual loss of communication between the MP and the
Functional ID has occurred for a 30 second period

Remote

Reset
Level

Operator Display Diagnostics and Messages
Table 35.

Operator display diagnostics and messages

Operator Display Message

Description
//Troubleshooting

Communication Lost with UC800

•
•
•
•

Ethernet cable not connected between display and UC800.
UC800 not powered.
UC800 has an invalid configuration – Download a valid configuration
UC800 is in Binding View. When exit Binding View, select ‘Restart’ on this message

Display Failed to Establish
Communication

• Ethernet cable not connected between display and UC800.
• UC800 not powered.
• UC800 just has the backup application running as received from the vendor. Download CTV application
software.
• UC800 has an invalid configuration – Download a valid configuration

Display is about to Restart

• The display is low on memory, and needs to re-start. Select Yes to restart. Selecting Yes will not affect
the UC800 operation. Only the Operator Display is reset.

File Not Found

• Update UC800 software with Tracer TU.

Screen partially populated. Auto and
Stop button graphics display, no text.

• Valid configuration is not present. Download a configuration.

Screen Unresponsive

• TU is downloading software. Wait till download is complete.

The Page Cannot be found

•
•
•
•

UC800 Configuration is Invalid

• Update the UC800 configuration with TU.

88

Most likely this UC800 has only the backup application. Download the latest UC 800 software build.
This could also mean that the UC800 does not have a valid configuration. Download a configuration to it.
Cycle power to the OD and UC800.
UC could be in binding view. If so, get it out of binding view by navigating to another screen in TU.

RTAE-SVX001B-EN

Unit Wiring
Table 36 provides a list of electrical schematics, field
wiring diagrams and connection diagrams for RTAE units.
Complete wiring package is documented in

Table 36.

RTAE-SVE001*-EN. A laminated wiring diagram booklet is
also shipped with each RTAE unit.

RTAE unit wiring drawing numbers

Drawing Number

Description

Single Circuit Units
2311-1954

Schematic Diagram

5724-4483

Fan Location Diagram

5724-4473

Assembly; Sensor Routing

2311-1965

Panel Component Location Diagram

2311-1966

Field Wiring Diagram

2311-1964

Field Layout Diagram

Dual Circuit Units(a)
2311-1960

Schematic Diagram

Dual Circuit without CE option

2311-1980

Schematic Diagram

Dual Circuit with CE option

5724-2731

Fan Location Diagram

5724-2721

Assembly; Sensor Routing

2311-1963

Panel Component Location Diagram

5724-4573

Panel Component Location Diagram

Dual Circuit with CE option

2311-1961

Field Wiring Diagram

Dual Circuit without CE option

2311-1967

Field Wiring Diagram

Dual Circuit with CE option

2311-1962

Field Layout Diagram

Dual Circuit without CE option

(a) Dual circuit units with CE option will be indicated by unit model number digit 13=3.

RTAE-SVX001B-EN

89

Log and Check Sheet
The operator log and check sheet are included for use as
appropriate, for installation completion verification before
Trane start-up is scheduled, and for reference during the
Trane start-up.
Where the log or check sheet also exists outside of this
publication as standalone literature, the literature order
number is also listed.
•

Stealth™ RTAE Installation Completion Check Sheet
and Request forTrane Service (RLC-ADF002-EN)

•

Operator Log

90

RTAE-SVX001B-EN

Stealth™ RTAE
Installation Completion Check Sheet and Request for Trane Service
Important:

A copy of this completed form must be submitted to theTrane service agency that will be responsible for the startup of the chiller. Start-up will NOT proceed unless applicable items listed in this form have been satisfactorily
completed.

To:
Trane Service Office:
S.O. Number:
Serial Numbers:
Job/Project Name:
Address:
The following items are being installed and will be completed by:
Important:

Start-up must be performed byTrane or an agent ofTrane specifically authorized to perform start-up ofTrane®
products. Contractor shall provideTrane (or an agent ofTrane specifically authorized to perform start-up) with
notice of the scheduled start-up at least two weeks prior to the scheduled start-up.

Check boxes if the task is complete or if the answer is “yes.”
1. Chiller
 Installation meets foundation requirements.
 In place and piped.
 Isolation pads or elastomeric pads installed (optional).
2. Piping
 Water piping flushed before making final connections to the system
Chilled water piping connected to:
 Evaporator
 Air handling units
 Pumps
 Flow switch or flow proving device installed (if not factory provided)
 Strainer installed and cleaned
 Water supply connected to filling system
 Systems filled
 Pumps run, air bled from system
 Strainer installed and cleaned
 Relief valve ventilation piping installed (if applicable)
3. Flow balancing valves installed
 Leaving chilled water
 Leaving condenser water (if applicable)
 Optional heat recovery or auxiliary condenser water (if applicable)
4. Gauges, thermometers, and air vents
 Installed on both sides of evaporator
5. Wiring
 Wire size per submittal and NEC
 Full power available
 Interconnecting wiring, starter to panel (as required)
 External interlocks (flow switch, pumps auxiliary, etc.)
 Chilled water pump (connected and tested)
 115 Vac power available for service tools
 All controls installed and connected
 All magnetic starters installed and connected
6. Testing
 Dry nitrogen available for pressure testing
 Trace gas amounts of R-410A or R-134a available for leak testing, if necessary
7.  Refrigerant on job site (if nitrogen charge option, model number digit 15 = 2, is chosen)
8.  Systems can be operated under load conditions
RLC-ADF002-EN

1

9. Heaters
 If unit was factory charged (model number digit 15 = 1), energize heaters for 24 hours prior to start up.
Important: It is required that chiller heaters are energized for a minimum of 24 hours prior to start up.Therefore,
chiller should have power for this amount of time beforeTrane Service arrives to do start-up.
 If unit has nitrogen charge (model number digit 15 = 2), contactTrane Service for unit charging prior to start-up.
Important: Do NOT apply shore power to unit with nitrogen charge. Shore power will drive EXV valves, inhibiting
ability to adequately vac and charge unit.
10. Equipment room
 Does the equipment room have a refrigerant monitor/sensor capable of monitoring and alarming within the allowable
exposure level of the refrigerant?
 Does the installation have properly placed and operating audible and visual refrigerant alarms?
 Does the equipment room have proper mechanical ventilation?
 If it is required by local code, is a self-contained breathing apparatus available?
11. Owner awareness
 Has the owner been fully instructed on the proper use of refrigerant?
 Does the owner have a copy of the MSDS for refrigerant?
 Was the owner given a copy of the Refrigerant Handling Guidelines?
Note: Additional time required to properly complete the start-up and commissioning, due to any incompleteness of the
installation, will be invoiced at prevailing rates.
This is to certify that theTrane® equipment has been properly and completely installed, and that the applicable items listed above
have been satisfactorily completed.
Checklist completed by: ______________________________________________________________________________________________
Signed: _____________________________________________________________________
Date: _______________________________
In accordance with your quotation and our purchase order number __________________, we will therefore require the presence
ofTrane service on this site, for the purpose of start-up and commissioning, by __________________ (date).
Note: Minimum two-week advance notification is required to allow scheduling of the chiller start-up.
Additional comments/instructions: ____________________________________________________________________________________
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
Note: A copy of this completed from must be submitted to theTrane Service Office that will be responsible for start-up of chiller.
Stealth,Trane and theTrane logo are trademarks or registered trademarks ofTrane in the United States and other countries.

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the
leader in creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broad
portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more
information, visit www.Trane.com.
Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
© 2013Trane All rights reserved
RLC-ADF002-EN 23 Sep 2013

We are committed to using environmentally

New

conscious print practices that reduce waste.

Operator Log
Stealth™ RTAE Chiller with UC800 Controller - Tracer AdaptiView Reports - Log Sheet
Start

15 minutes
Evaporator

30 minutes

1 hour

Active Chilled Water Setpoint
Entering Water Temperature
Leaving Water Temperature

Ckt 1
Saturated Refrigerant Temperature (°F)
Refrigerant Pressure (psia)
Approach Temperature (°F)
Water Flow Status
Spillover Tank Liquid Level (in)
EXV % Open

Ckt 2
Saturated Refrigerant Temperature (°F)
Refrigerant Pressure (psia)
Approach Temperature (°F)
Water Flow Status
Spillover Tank Liquid Level (in)
EXV % Open

Condenser
Outdoor Air Temperature

Ckt 1
Air Flow %
Saturated Refrigerant Temperature (°F)
Refrigerant Pressure (psia)

Ckt 2
Air Flow %
Saturated Refrigerant Temperature (°F)
Refrigerant Pressure (psia)

Compressor 1A
Running Status
Starts
Running Time (Hr:Min)
Oil Pressure (psia)

Motor 1A
Active Demand Limit Setpoint
Average Motor Current (%)
Percent Speed
AFD Average Input Current (Amps)
AFD Average Input Voltage (Volts)
AFD Input Power (kW)
AFD Output Power (kW)
AFD Speed (rpm)

Compressor 2A
Running Status
Starts
Running Time (Hr:Min)
Oil Pressure (psia)

Motor 2A
Active Demand Limit Setpoint
Average Motor Current (%)
Percent Speed
AFD Average Input Current (Amps)
AFD Average Input Voltage (Volts)
AFD Input Power (kW)
AFD Output Power (kW)
AFD Speed (rpm)

Date:
Technician:
Owner:

RTAE Operator Log

Revised: 23 Sep 2013

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in
creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broad portfolio of advanced
controls and HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com.
Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

© 2014Trane All rights reserved
RTAE-SVX001B-EN 29 Oct 2014

We are committed to using environmentally

Supersedes RTAE-SVX001A-EN (24 Sep 2013)

conscious print practices that reduce waste.



---

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Author                          : Sheryl Hill
Create Date                     : 2014:10:22 11:22:12Z
Keywords                        : Stealth, RTAE, air-cooled
Modify Date                     : 2014:10:28 13:17:58-06:00
Subject                         : Stealth™ Air-Cooled Chiller Model RTAE, 150 to 300 Tons
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Title                           : RTAE-SVX001B-EN (10/2014):  Installation, Operation and Maintenance, Stealth™ Air-Cooled Chiller Model RTAE, 150-300 Tons
Creator                         : Sheryl Hill
Description                     : Stealth™ Air-Cooled Chiller Model RTAE, 150 to 300 Tons
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