Trane Rt Svx19A E4 Users Manual

rtsvx19ae4 59ce82fb-902c-474a-8563-47f43d70690e Trane Thermostat RT-SVX19A-E4 User Guide |

2015-01-21

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Installation
Operation
Maintenance
Voyager™ II Rooftop units
Cooling only TKD/TKH 155 175 200 250
Reversible WKD/WKH 125 155 200
Gas-Fired YKD/YKH 155 175 200 250
R22 - R407C Refrigerant

RT-SVX19A-E4

General information
Foreword

Warnings and cautions

Reception

These instructions are given as a
guide to good practice in the
installation, start-up, operation, and
maintenance by the user, of Trane
TKD/TKH, WKD/WKH and YKD/YKH
units. They do not contain full
service procedures necessary for
the continued successful operation
of this equipment. The services of a
qualified technician should be
employed through the medium of a
maintenance contract with a
reputable service company. Read
this manual thoroughly before unit
start-up.

Warnings and Cautions appear at
appropriate sections throughout
this manual. Your personal safety
and the proper operation of this
machine require that you follow
them carefully. The constructor
assumes no liability for installations
or servicing performed by
unqualified personnel.

On arrival, inspect the unit before
signing the delivery note.

TKD/TKH units are designed to
operate in cooling mode only, with
optional auxiliary heat (electric
heater or hot water coil).
WKD/WKH can operate in cooling
mode or heating mode by reversing
the refrigeration cycle with or
without auxiliary heat.
YKD/YKH units are designed to
operate In cooling mode and
equipped with a gas fired heating
module.
TKD/TKH, WKD/WKH and YKD/YKH
units are assembled, pressure
tested, dehydrated, charged and run
tested before shipment.

WARNING! : Indicates a potentially
hazardous situation which, if not
avoided, could result in death or
serious injury.
CAUTION! : Indicates a potentially
hazardous situation which, if not
avoided, may result in minor or
moderate injury. It may also be
used to alert against unsafe
practices or for equipment or
property-damage-only accidents.

In case of visible damage: The
consignee (or the site
representative) must specify any
damage on the delivery note,
legibly sign and date the delivery
note, and the truck driver must
countersign it. The consignee (or the
site representative) must notify
Trane Epinal Operations - Claims
team and send a copy of the
delivery note. The customer (or the
site representative) should send a
registered letter to the last carrier
within 3 days of delivery.
Reception in France only:
Concealed damage must be looked
for at delivery and immediately
treated as visible damage.

Safety recommendations
To avoid death, injury, equipment or
property damage, the following
recommendations should be
observed during maintenance and
service visits:
1. The maximum allowable
pressures for system leak testing
on low and high pressure side
are given in the chapter
"Installation". Always provide a
pressure regulator.
2. Disconnect the main power
supply before any servicing on
the unit.
3. Service work on the refrigeration
system and the electrical system
should be carried out only by
qualified and experienced
personnel.

Reception in all countries except
France:
In case of concealed damage: The
consignee (or the site
representative) must send a
registered letter to the last carrier
within 7 days of delivery, claiming
for the described damage. A copy of
this letter must be sent to Trane
Epinal Operations - Claims team.

RT-SVX19A-E4

General information
Warranty

Refrigerant

Storage

Warranty is based on the general
terms and conditions of the
manufacturer. The warranty is void if
the equipment is repaired or
modified without the written
approval of the manufacturer, if the
operating limits are exceeded or if
the control system or the electrical
wiring is modified. Damage due to
misuse, lack of maintenance or
failure to comply with the
manufacturer's instructions or
recommendations is not covered by
the warranty obligation. If the user
does not conform to the rules of
this manual, it may entail
cancellation of warranty and
liabilities by the manufacturer.

The refrigerant provided by the
manufacturer meets all the
requirements of our units. When
using recycled or reprocessed
refrigerant, it is advisable to ensure
its quality is equivalent to that of a
new refrigerant. For this, it is
necessary to have a precise analysis
made by a specialized laboratory. If
this condition is not respected, the
manufacturer warranty could be
cancelled.

Take precautions to prevent
condensate formation inside the
unit's electrical components and
motors when:
1. The unit is stored before it is
installed; or,
2. The unit is set on the roof curb
and temporary auxiliary heat is
provided in the building.

RT-SVX19A-E4

Maintenance contract
It is strongly recommended that you
sign a maintenance contract with
your local Service Agency. This
contract provides regular
maintenance of your installation by
a specialist in our equipment.
Regular maintenance ensures that
any malfunction is detected and
corrected in good time and
minimizes the possibility that
serious damage will occur. Finally,
regular maintenance ensures the
maximum operating life of your
equipment. We would remind you
that failure to respect these
installation and maintenance
instructions may result in
immediate cancellation of the
warranty.

Isolate all side panel service
entrances and base pan openings
(e.g., conduit holes, S/A and R/A
openings, and flue openings) to
minimize ambient air from entering
the unit until it is ready for start-up.
Do not use the unit's heater as
temporary heat without completing
the start-up procedures detailed
under "Unit Start-Up".
The Trane Company will not assume
responsibility for equipment
damage resulting from
accumulation of condensate on the
unit electrical components.

Training
To assist you in obtaining the best
use of it and maintaining it in
perfect operating condition over a
long period of time, the
manufacturer has at your disposal a
refrigeration and air conditioning
service school. The principal aim of
this is to give operators and
technicians a better knowledge of
the equipment they are using, or
that is under their charge. Emphasis
is particularly given to the
importance of periodic checks on
the unit operating parameters as
well as on preventive maintenance,
which reduces the cost of owning
the unit by avoiding serious and
costly breakdown.

Contents

Foreword

Warnings and Cautions

Safety recommendations

Reception

Warranty

Refrigerant

Maintenance contract

Storage

Training

Installation

Reception of units

Roof curb installation

Dimensions/Weights/Clearances

Installing the unit

Connection of duct network

Condensate drain piping

Gas pipework installation

Filter installation

Supply fan adjustment

Component air pressure drops

Supply fan performances

Electrical connection

Controls

Control wiring

CO2 sensors

Remote potentiometer

Fire thermostat

Clogged filter detector

Smoke detector

High temperature safety thermostat

Remote fault relay

Thermostats

Communication Interfaces

39
RT-SVX19A-E4

Contents
Unit Options
Hot water coil

Electric Heater

Soft Starter

0 - 25% fresh air hood

Barometric relief

Operation

Operation with a conventional thermostat

Setting the economizer

Test procedures

Test modes

Unit start-up

Cooling without an Economizer

Low Ambient Operation

Cooling with an Economizer

Economizer Set-Up

ReliaTel™ Control Heating Operation

Ignition Module

Final installation checklist

Maintenance

RT-SVX19A-E4

End user routine maintenance

Service technician maintenance

Troubleshooting

Installation
General information : The
installation must conform to all
local standards and regulations.

Reception of units
Rooftop unit
The unit is supplied on a wooden
frame. It is recommended to check
the machine's condition upon
reception.

There are two ways to handle the
unit:
1. Use the openings in the wooden
frame to handle the machine
using a fork lift, in accordance
with applicable safety
regulations.
2. Use a lifting beam correctly
adjusted to fit the unit
(Figure 1a).
Unit handling
The units are supplied on the truck
but are not unloaded. An opening is
provided on each corner of the unit
base to facilitate handling.
4 shackles and 4 slings are required.
Use a lifting beam to prevent the
cables pressing too hard on top of
the unit during lifting.
Figure 1a indicates the position of
the center of gravity and the lifting
recommendations.
Important: For unit to fit on the
roof curb the fork lift pockets must
be removed.

Figure 1a - Unit handling

1 = Clevis
2 = Base Rail
3 = Spreader Bar
L = Length (Center of Gravity)
W = Width (Center of Gravity)
Refer to Table 2 for weights and center of gravity.

RT-SVX19A-E4

Installation
Table 1 - Sling lengths and maximum unit weight
Unit size

A (mm)

B (mm)

Maximm weight
kg

125

3000

1900

644

155

3000

1900

773

175

3000

1900

810

400

3500

2200

1001

500

3500

2200

1027

Figure 1b - Maximum slope correction of adjustable roof curb.

Roof curb Installation
(TKD-WKD-YKD
accessories)
Roof curbs are available as an
accessory for "downflow" units to
support the unit and ensure the
water tightness between the rooftop
and the roof. Two types of roof
curbs are available: The standard
version to allow the installation of
the unit on a flat roof and the
adjustable version for a sloped roof
installation. (See Figure 1b for the
maximum slope correction of
adjustable roofcurb.)
The adjustable roof curbs are
supplied pre-assembled on a skid.
Two types of self-adhesive seals are
provided separately. (40 mm wide
for the perimeter, 20 mm wide for
the cross pieces). Make sure they
are properly installed where
indicated to assure an adequate
curb to unit seal.
Instructions for the roof curb
assembly and installation with curb
dimensions are provided with each
roof curb kit.

Figure 2 - Waterproofing

4
3
1

1
2
3
4

=
=
=
=

Roofcurb
Roof membrane
Seal
Rooftop

RT-SVX19A-E4

Installation
Dimensions/Weights/Clearances
Figure 3 - Minimum clearances

Table 2 - Minimum clearances (mm)
Minimum clearance
UNIT

YKD/YKH 155

1900

1800

1220

1000

1300

YKD/YKH 175

1900

1800

1220

1000

1300

YKD/YKH 200

1900

1800

1220

1000

1300

YKD/YKH 250

1900

1800

1220

1000

1300

TKD/TKH 155

1900

1800

1220

1000

1300

TKD/TKH 175

1900

1800

1220

1000

1300

TKD/TKH 200

1900

1800

1220

1000

1300

TKD/TKH 250

1900

1800

1220

1000

1300

WKD/WKH 125

1900

1800

1220

1000

1300

WKD/WKH 155

1900

1800

1220

1000

1300

WKD/WKH 200

1900

1800

1220

1000

1300

The structure accommodating the unit(s) must be designed to support the
equipment in operation, as a minimum. Refer to Table 3a and the space
requirement plan.

RT-SVX19A-E4

Installation
Table 3a - Weigths & center of gravity (Figure 1)
Maximum weight

Corner Weight (1)

Center of Gravity

Shipping

Net

Length (L)

Width (W)

UNIT

(kg)

(mm)

YKD/YKH 155

866

698

243

176

118

162

1143

737

YKD/YKH 175

902

735

251

188

127

169

1168

737

YKD/YKH 200

1128

920

324

242

151

203

1321

838

YKD/YKH 250

1154

946

327

251

159

208

1346

838

TKD/TKH 155

790

623

219

159

103

142

1143

711

TKD/TKH 175

827

660

227

172

112

149

1168

711

TKD/TKH 200

1050

841

297

221

138

185

1321

838

TKD/TKH 250

1075

866

300

230

145

206

1346

838

WKD/WKH 125

792

625

218

159

105

144

1143

711

WKD/WKH 155

809

642

228

162

105

147

1143

711

WKD/WKH 200

1080

871

291

226

155

199

1346

889

1. Corner weights are given for information only. All models must be supported continuously by a curb or equivalent frame support.

Table 3b - Weights of Options & accessories

UNIT
YKD 155

Standard Roof Adjustable Roof
Curb
Curb
93
220

Economizer
30

Manual Outside
Air Damper
15

Motorized
Outside Air
Damper
27

YKD 175

220

YKD 200

107

260

YKD 250

107

260

YKH 155

YKH 175

YKH 200

YKH 250

Electric heater

Hot water coil

TKD 155

220

TKD 175

220

TKD 200

107

260

110

TKD 250

107

260

110

TKH 155

TKH 175

TKH 200

WKD 125

TKH 250
93

180

WKD 155

220

WKD 200

107

260

110

WKH 125

WKH 155

WKH 200

Notes :
Net weight should be added to unit weight when ordering factory installed accessories.
To estimate shipping weight add 2.3 kg to net weight.

RT-SVX19A-E4

Installation
Installing the unit
1) Unit mounting on roof

Figure 4

Fix the rooftop curb on the joint
beam of the building's structure.
Make the rooftop curb's sealing
surface level using angle brackets
adjusted by screw bolts, located
around its perimeter. Place the
adhesive seals on the curb's sealing
surface (perimeter and cross
pieces). Make the rooftop leak-tight
around the curbs before installing
the unit, in compliance with current
construction standards.
Note: The unit must be installed
perfectly level to ensure
condensates flow from the
condensate tray.

1 = Frame

The rooftop unit nests into the curb
and is supported by it. Position the
unit, taking care to comply with the
indicated directions: the unit's
discharge and intake openings must
match those of the curb.
2) Installing the unit on the ground

Figure 5

To install the unit on the ground, its
base must be level and supported
securely.
For horizontal discharge units, a
support is required such as a metal
or concrete slab whose height must
be determined according to the
amount of snow cover, to prevent
problems with condensation
drainage and obstruction of the
external coil. If necessary use an
anti-vibration material between the
rooftop unit's base and the support.
Note: Unit installation must comply
to local codes

1 = Concrete slab

RT-SVX19A-E4

Installation
Connection of duct
network
1) Downflow discharge units
(TKD,WKD,YKD)
Using the rooftop curb
• The rooftop curb must be
insulated on the outside walls at
the discharge and intake
openings to prevent
condensation in the ducts.
• The rims around the discharge
and intake openings make it
possible to attach the flanges on
the ends of the ducts. If you are
using rigid duct ends
recommended on the rooftop
curb plan, it is essential to fix
these components before
installing the unit.
• For the design of the duct
network, comply with
recommendations currently
applicable on the market, in
particular:

. Installation of a section of
flexible ducts to limit
transmission of the unit's
vibrations
. Use of movable vanes or
deflectors to reduce the sound
level.
2) Horizontal discharge units
(TKH,WKH,YKH)
• The intake and discharge ducts
must be insulated (thermal
insulation).
• The duct section located outside
must be leak-tight.
• Provide a flexible connector to
prevent transmission of the unit
vibrations. This flexible duct
must be installed inside the
building.
Note: In case of use of TKH, WKH or
YKH units with economizer option,
temperature and humidity sensors
must be installed in return duct.
Economizer linkage is factory
mounted but the damper position
must be adjusted on site.

Figure 6 - Condensate Drain location

1 = Condensate drain connection
A = TKH/YKH 155, 175, 200, 250 - WKH 125,155, 200
B = TKD/YKD 155, 175, 200, 250 - WKD 125,155,200

RT-SVX19A-E4

Installation
Condensate drain piping
A 42mm PVC condensate drain
connection with P-trap is provided.
Follow local codes and standard
piping practices when running the
drain line. Install a trap and be sure
to fill with water before starting the
unit. Pitch the line downward, away
from the unit to avoid long, level,
horizontal runs. Refer to Figure 7.

Figure 7 - Condensate drain line connection

1
2
3
4

=
=
=
=

Static pressure drain pan
Panel enclosure
42mm PVC drain
Cleanout plug

RT-SVX19A-E4

Installation
Gas pipework installation
The installation must conform to all
standards and regulations.

CAUTION! Should the pressure at
the unit valve gas inlet be higher
than 0.035 bar, an expansion valve
must be installed.

The gas supply pipework and gas
stop valve to be installed near the
unit must be sized so as to assure
the gas pressure is sufficient at the
unit inlet when operating at full
load.

The pipework must be selfsupporting and the final connection
to the burner must be made by a
flexible pipe. Provide a dust
protection (filter) upstream the unit
connection.

CAUTION! The gas pipework must
not exert any stress on the burner
gas connection.
Note: Expansion valve must be
adapted to the type of gas used:
• G 20 : 20 mb
• G 25 : 25 mb
• G 31 : (Propane): 37 or 50 mb
Table 4 - Gas burner models
Unit
Burner size
YKD/H

155

G350A

YKD/H

175

G350A

YKD/H

200

G350A

YKD/H

250

G350A

See Table 38 for burner
performance.
Gas leak check procedure
1. Vent the gas line
2. Gas supply line pressure test:
close valve 4 and open valve 2
3. Leak-check the gas pipe
Look for gas pipe leaks using
"Typol", "1000 bulles" or a similar
product. Do not use soapy water.

Figure 8 - Typical gas supply Pipework

WARNING! Never use an open
flame to check for gas leaks.
Required gas pressure at the unit
inlet connection are given in
Table 37.
Note: To operate with propane gas,
the burner is fitted with a pressure
limiter (supplied by Trane)

1
2
3
4

=
=
=
=

Evaporator section
Gas burner section
Condenser section
Gas supply connection

RT-SVX19A-E4

5 = Gas supply line
6,8 = Gas stop valve (Field supplied)
7 = Expansion valve (Field supplied)
9 = Filter (Field supplied)

Installation
Filter installation
To gain access to filters, remove the
supply fan access panel on
downflow units and the filter access
panel on the end for horizontal
units.

CAUTION! Do not operate unit
without filters in place.
The maximum pressure drops
allowable on filters are:
EU2/G2: 120 Pa
EU4/G4: 150 Pa

Each unit ships with 40 or 50 mm
thick filters. Number and size of
filters is determined by size and
configuration of the unit.

Table 5 - Filter arrangement
UNIT
YKH/YKD 155
YKH/YKD 175
YKH 200
YKD 200
YKH 250
YKD 250
TKH/TKD 155
TKH/TKD 175
TKH 200
TKD 200
TKH 250
TKD 250
WKH/WKD 125
WKH/WKD 155
WKH 200
WKD 200

EU2/G2

EU4/G4

Qty

Size

Qty

Size

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

(508x635x50)

(500x625x50)

(508x508x50)

(498x498x40)

(508x635x50)

(500x625x50)

RT-SVX19A-E4

Installation
Supply fan adjustment
Use the following procedure to
determine the proper adjustment of
the supply fan for a specific
application.
1. Determine total external static
pressure about system and
accessories.
a. Obtain the design airflow rate
and the design external static
pressure drop through the
distribution system.

b. Add static pressure drop of the
accessories installed on the
unit. (Table 7,8 & 9)
c. Add the total accessory static
pressure drop (from step 1b) to
the design external static
pressure (from step 1a). The
sum of these two values is the
total system external static
pressure.

2. Using the Tables 10 through 20 to
find the external static pressure
that most closely approximates
total system external static
pressure. Then locate the
appropriate airflow rate for your
unit. The value obtained
represents the brake horsepower
for the supply fan motor and the
fan RPM.
3. Adjust motor sheave according
to Table 6.

Table 6 - Motor sheave / Fan speed

UNIT
YKD/YKH 155
YKD/YKH 175
YKD/YKH 200
YKD/YKH 250
TKD/TKH 155
TKD/TKH 175
TKD/TKH 200
TKD/TKH 250
WKD/WKH 125
WKD/WKH 155
WKD/WKH 200

RT-SVX19A-E4

6 turns
Open
566
724
513
588
566
724
513
588
533
566
513

6 turns
Open
672
791
680
690
672
791
680
690
724
513
588

5 turns
Open
601
769
550
619
601
769
550
619
566
601
550

5 turns
Open
714
840
711
722
714
840
711
722
769
550
619

4 turns
Open
637
815
586
650
637
815
586
650
600
637
586

Fan Speed (RPM)
Standard Drive
3 turns
Open
672
860
623
681
672
860
623
681
633
672
623

2 turns
Open
708
906
659
712
708
906
659
712
667
708
659

1 turns
Open
743
951
696
743
743
951
696
743
700
743
696

Closed
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

4 turns
Open
756
890
742
754
756
890
742
754
815
586
650

Fan Speed (RPM)
Oversized Drive
3 turns
Open
798
939
773
786
798
939
773
786
860
623
681

2 turns
Open
840
989
804
818
840
989
804
818
906
659
712

1 turns
Open
882
1038
835
850
882
1038
835
850
951
696
743

Closed
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

Installation
Figure 9 - Typical fan, motor, and sheave
assembly

To increase airflow
Loosen variable sheave set screw
and turn sheave clockwise.
To decrease airflow
Loosen variable sheave set screw
and turn sheave counter-clockwise.
To increase belt tension
Loosen the nut (next to the idler
sheave) that secures the sheave in
place. With a wrench, apply
pressure clockwise on the outside
nut (round headed one), until
tension desired is reached. While
holding pressure with the tension
nut, retighten the nut next to the
idler sheave.

A = Fan Housing
B = Terminal Block
C = Fan Sheave
D = Plastic Bushing
E = Belt Tension Adjustment Bolt
F = Idler Pulley

Table 6b - Belt tensioning

TK* / YK* /
Motor kW
WK*
125
155
175
200
250
125
155
175
200
250

1,5
1,5
3
3
4,6
3
3
4,6
4,6
4,6

Fan pulley
Type /
diam. (mm)

Belt type
/ lengh (mm)

Belt
deflexion
(mm)

Deflexion
effort
mini kg

BK90 / 222
BK85 / 210
BK130 / 324
BK160 / 400
BK190 / 476
BK130 / 324
BK140 / 349
BK140 / 349
BK190 / 476
BK190 / 476

1VP44 / 105
1VP44 / 105
1VP44 / 105
1VL40 / 95
1VP50 / 121
1VP44 / 105
1VP44 / 105
1VP56 / 136
1VP56 / 136
1VP56 / 136

BX68 / 1727
BX68 / 1727
BX75 / 1905
BX90 / 2286
BX96 / 2438
BX75 / 1905
BX77 / 1955
BX75 / 1905
BX96 / 2438
BX96 / 2438

5,89
6
6,05
6,96
6,91
5,85
6,17
5,45
6,87
6,32

2,4
2,4
2,4
2,4
2,4
2,4
2,4
2,4
2,4
2,4

Deflexion Belt tension Belt tension
effort
mini
maxi
maxi kg
N
N
2,9
2,9
2,9
2,9
2,9
2,9
2,9
2,9
2,9
2,9

400
400
400
400
400
400
400
400
400
400

500
500
500
500
500
500
500
500
500
500

RT-SVX19A-E4

Installation
Component air pressure drops
Table 7 - YKD/YKH Pressure drop through accessories
Filter
Filter

YKD/YKH 155

YKD/YKH 175

YKD 200

YKH 200

YKD 250

YKH 250

RT-SVX19A-E4

Economizer Economizer

Airflow

EU2/G2

EU4/G4

100%
outside air

100%
return air

6800
7650
8500
9350
10200
7870
8860
9850
10840
11830
8970
10090
11210
12330
13450
8970
10090
11210
12330
13450
11280
12690
14100
15510
16920
11280
12690
14100
15510
16920

13
16
19
22
26
17
21
25
30
35
12
15
19
23
27
11
14
17
20
23
18
24
29
36
43
17
21
26
31
36

27
30
34
37
40
30
34
38
43
47
26
30
33
37
41
23
26
29
33
36
32
36
41
46
51
30
34
38
43
47

8
10
12
14
16
10
12
15
17
20
29
37
45
55
65
33
41
51
61
72
46
58
71
86
102
52
65
80
96
114

6
7
8
9
10
7
8
9
11
12
6
8
9
11
13
6
8
9
11
13
10
12
14
17
19
10
12
14
17
19

Installation
Table 8 - TKD/TKH Pressure drop through accessories
Filter

TKD/TKH 155

TKD/TKH 175

TKD 200

TKH 200

TKD 250

TKH 250

Filter

Economizer

Electric

Hot water coil

100%
outside air

100%
return air

heater

Downflow only

Airflow

EU2/G2

EU4/G4

6800

7650

8500

9350

10200

7870

8860

9850

10840

11830

8970

10090

11210

12330

13450

8970

10090

11210

12330

13450

11280

12690

14100

15510

16920

102

11280

12690

14100

15510

16920

114

RT-SVX19A-E4

Installation
Table 9 - WKD/WKH Pressure drop through accessories
Filter
EU2/G2
9

Filter
EU4/G4
21

Economizer
100%
outside air
6

Economizer
100%
return air
5

Electric
heater
4

Hot water coil
Downflow only
37

6430

7140

7850

8560

6800

Airflow
5720
WKD/WKH 125

WKD/WKH 155

WKD 200

WKH 200

RT-SVX19A-E4

7650

8500

9350

10200

8970

10090

11210

12330

13450

8970

10090

11210

12330

13450

Installation
Supply fan performances
Table 10 - YK 155 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

6800
7650
8500

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)
564

587

1.07

610

1.15

633

1.23

655

1.31

677

560

1.14

583

1.23

605

1.31

627

1.39

648

1.48

669

1.56

690

1.65

710

1.39
1.74

1.6

649

1.69

669

1.78

689

1.87

708

1.97

727 2.06

746

2.16

559

1.31

584

1.41

606

1.5

628

9350

610

1.72

633

1.83

654

1.94

675 2.04 694 2.14 713 2.24 732 2.34 750 2.45 767 2.55 785 2.65

10200

661 2.21 683 2.33 703 2.45 722 2.56
External Static Pressure (Pa)
275

300

325

350

375

400

425

450

475

500

m3/h

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

6800

699 1.47

719

1.55

739

1.63

758

1.71

777

7650

729 1.82

749

1.92

768

2.01

787

2.1

806 2.19

8500

764 2.25 782 2.35 800 2.45 818 2.55

1.79

795

1.86

813

1.94

830

2.01

847 2.09 863 2.16

824 2.28 841 2.37 858 2.46 875 2.55

9350
10200
Standard drive
Oversized drive

RT-SVX19A-E4

Installation
Table 11 - YK 175 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

7870

726

8860

751

1.96

1.58

748

1.66

770

1.74

772 2.05 792 2.13

811

2.22 831 2.31 850

9850

779 2.41 801 2.52 822 2.62 841 2.72 859 2.82 877 2.91 895 3.01

10840

852 3.19

11830

926 4.12 946 4.25

874

3.31 893 3.42

911

791
912

1.83

813

1.92

835 2.02

2.4

869

2.5

888

3.11

929 3.21 947 3.31

2.6

3.53 928 3.64 945 3.75 961 3.85 977 3.96 993 4.07 1009 4.18

External Static Pressure (Pa)
275

300

325

350

375

400

425

450

475

500

m3/h

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

7870

857 2.12 879 2.22 900 2.33 921 2.44 942 2.55 962 2.65 981 2.75 1000 2.86 1018 2.96 1036 3.06

8860

907

9850

964 3.42 981 3.53 998 3.64 1016 3.76 1033 3.88

10840

1024 4.29

2.7

927 2.81 946 2.92 965 3.03 985 3.15

11830
Standard drive
Oversized drive

Table 12 - YK 200 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

8970
10090

529

11210

530

1.99

1.71

548

530

1.5

551

567

1.94

586 2.06 604 2.18 623 2.31 641 2.45

1.61

572

551 2.12 570 2.24 588 2.36 606 2.48 623 2.61 640

12330

548 2.41 573 2.58 594 2.73 613 2.87 630

13450

593

3.1

1.83
3

646 3.13 662 3.27 678

617 3.29 638 3.46 656 3.61 672 3.76 688

3.9

1.74

593

1.87

614

2.74

657 2.87 673 3.01

3.4

693 3.54 709 3.69

703 4.05 718 4.19

External Static Pressure (Pa)
275

300

325

350

375

400

425

450

475

500

m3/h

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

8970

633 2.14 652 2.27 670

10090

660

11210

690 3.16 707 3.31 724 3.47

12330

724 3.84 739 3.99 754

2.6

2.4

688 2.54 705 2.67 721

679 2.75 697 2.91 714 3.06 731 3.21
741

747

2.8

737 2.93 753 3.06

3.35

763

3.5

768

778 3.65 793

3.19 783 3.31
3.8

808 3.95

3.64 757 3.81 773 3.98 789 4.14 804 4.31

4.15 770 4.31

13450
Standard drive
Oversized drive

RT-SVX19A-E4

Installation
Table 13 - YK 250 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

9870

606

11280

603

12690

1.88

620

1.97

639 2.77 660 2.92 679 3.06 696 3.19 712 3.32 727 3.44

15510

699 3.65 719 3.82 736 3.98 753 4.13

16920

758 4.70 777 4.89 794 5.06 810 5.23 824 5.39 838 5.54

625

1.72

643

1.82

637 2.07 653 2.17 670 2.27 686 2.37

602 2.18 622 2.30 640 2.41 657 2.52 673 2.63 688

14100

1.62

742

2.74

704 2.85 719 2.96 733 3.08

3.56 756 3.68 770 3.80 784 3.92

768 4.27 782 4.40 796 4.54 810 4.67 823 4.81 836 4.94

External Static Pressure (Pa)
275

300

325

350

375

400

425

450

475

500

m3/h

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

9870

662 1.92

11280

702 2.48 718 2.59 734 2.70 750 2.82

12690

748

3.19

762

3.30

776

14100

797 4.05

810

4.17

823 4.30 836 4.43 849 4.55

15510

848 5.08

681 2.03 699

2.15

717

2.26 735 2.36 752 2.48
767

768

2.59 784 2.69 800 2.81 815 2.91

2.94 783 3.08 800 3.20 815

3.42 791 3.54 805 3.66

3.33 831 3.46 846 3.59

819 3.79 834 3.92 848 4.05

16920
Standard drive
Oversized drive

Table 14 - TK 155 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

6800

565

0.7

599 0.77 633 0.85 665 0.93 697

1.02

728

1.1

758

1.19

7650

571 0.82 603

0.9

634 0.99 665

1.07

694

1.16

723

1.25

752

1.34

780

1.44
1.73

8500

580 0.97 613

1.07

643

1.16

672

1.25

700

1.34

727

1.43

754

1.53

781

1.63

807

9350

590

1.13

624

1.24

656

1.35

684

1.46

711

1.55

738

1.65

763

1.75

788

1.86

813

1.96

838 2.07

10200

637

1.44

670

1.57

699

1.69

727

1.81

753

1.92

777 2.02 801

2.13 825 2.24 848 2.35 871 2.46

External Static Pressure (Pa)
275

300

325

350

375

400

425

450

475

500

m3/h

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

6800

787 1.28

815

1.37

842

1.46

7650

808 1.53

836

1.63

862

1.74

8500

833 1.83

858

1.93

883 2.04

9350

862 2.18 885 2.29 909

10200

894 2.58

868

1.54

2.4

Standard drive
Oversized drive

RT-SVX19A-E4

Installation
Table 15 - TK 175 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

7870

593 0.95 623

1.03

651

1.11

679

1.19

706

1.28

733

1.37

761

1.47

788

1.57

815

1.68

1.58

756

1.67

780

1.77

805

1.87

829

1.97

853 2.08

8860

623

1.21

653

1.31

680

1.4

706

1.49

731

9850

687

1.64

714

1.75

739

1.85

763

1.95

786 2.05 809 2.15 831 2.25 853 2.36 875 2.47 897 2.58

10840

750 2.16 775 2.28 799

2.4

821 2.51 843 2.62 864 2.73 884 2.84 905 2.95 925 3.07 945 3.18

11830

814 2.78 837 2.92 860 3.05 881 3.17

901 3.29 921 3.41 940 3.53 959 3.65 978 3.77 996 3.89

External Static Pressure (Pa)
275

300

325

350

375

400

425

450

475

500

m3/h

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

7870

842 1.79

869

1.91

8860

877 2.19

901

2.31 925 2.43 949 2.56 973 2.69 997 2.83 1020 2.96 1043

9850

919

2.7

941 2.82 962 2.94 984 3.07 1006

10840

965

3.3

985 3.43 1005 3.55 1025 3.68 1044 3.82

11830

1015 4.02 1033 4.15

896 2.03 921 2.15 946 2.27 970 2.39 994 2.51 1016 2.63 1038 2.75
3.2

3.1

1027 3.33

Standard drive
Oversized drive

Table 16 - TK 200 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

8970
10090
11210
1.58

512 0.98 542

1.09

571

1.21

600

1.33

629

1.45

656

1.58

684

519

1.16

547

1.28

575

1.39

601

1.51

627

1.64

653

1.77

679

1.91

704 2.05

1.72

1.63

610

1.76

634

1.89

658 2.02 682 2.16 705

2.3

729 2.44

528

1.36

557

1.5

584

568

1.74

596

1.9

622 2.05 647 2.19 670 2.33 692 2.47 714 2.62 735 2.77 757 2.92

12330

537

13450

580 2.01 609 2.19 636 2.37 661 2.54 684

2.7

706 2.85 728 3.01

748

3.16

768 3.32 788 3.48

External Static Pressure (Pa)
275
m3/h

300

325

350

375

400

425

450

475

500

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

8970

710

1.86

735

10090

729

2.2

753 2.35 777

759

11210

752

2.6

774

12330

778 3.08 799 3.24 820

13450

808 3.64 828 3.81

2.14 783 2.27 805 2.41 827 2.55
2.5

800 2.66 823 2.81

2.75 797 2.92 819 3.08 841 3.25
3.4

841 3.57

Standard drive
Oversized drive

RT-SVX19A-E4

Installation
Table 17 - TK 250 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

9870
11280

606

12690

599

1.8

628

1.97

1.63

585

1.31

609

1.42

632

1.51

633

1.77

657

1.9

679 2.02 700 2.13 720 2.24 739 2.35

655 2.15 681 2.31 704 2.47 726 2.62

14100

631

2.2

654 2.38 679 2.57 705 2.76 729 2.96 752 3.14

15510

690

2.9

711

16920

749

3.73 768 3.92 788 4.14 809 4.36

3.08 733 3.28 756

3.5

774

654
747

1.6
2.76

675

1.69

695

1.78

766 2.89 785 3.02

3.32 795 3.49 814 3.65 832

3.8

779 3.71 801 3.93 822 4.13 842 4.33

External Static Pressure (Pa)
275
m3/h

300

325

350

375

400

425

450

475

500

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

9870

714

751 2.02

769

2.1

786

11280

757 2.45 775 2.55 793 2.65

1.86

733

1.94

810

2.74

827 2.84 843 2.93 859 3.02

2.17

802 2.25 818 2.32 834 2.39 849 2.46 864 2.53

12690

803 3.14 820 3.26 837 3.38 853 3.49 869 3.61 885 3.72

14100

850 3.95 866 4.09 883 4.23 898 4.37

901

874

3.83 916

3.11

889 3.19 904 3.28

3.93 931 4.04

15510
16920
Standard drive
Oversized drive

Table 18 - WK 125 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

8970

562 0.55

10090

548

11210

0.6

544 0.68 578 0.75

12330
13450

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

584 0.68 620
611

542 0.77 577 0.85 609 0.93 640
541 0.85 578 0.96 612

1.05

643

1.14

601

671

0.63 639 0.71 675
0.76

0.8

709 0.89

655 0.84 690 0.93 723

0.83 644 0.91

676

1.01

670

1.1

1.23

699

1.32

741

0.98

1.03

755

1.13

708

1.09

739

1.19

770

1.29

700

1.19

730

1.28

759

1.38

788

1.48

727

1.41

755

1.51

782

1.61

809

1.71

External Static Pressure (Pa)
275

300

325

350

375

400

425

450

475

500

m3/h

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

5720

772 1.06

802

1.15

830

1.24

857

1.33

883

1.41

909

1.5

933

1.59

6430

786 1.23

815

1.32

843

1.42

871

1.52

897

1.62

922

1.72

947

1.82

7140

800

1.4

829

1.51

857

1.62

884

1.73

911

1.84

936

1.94

960 2.05

7850

816

1.59

844

1.7

872

1.82

898

1.94

925 2.06 950 2.18

8560

835 1.82

862

1.94

888 2.05 913

2.18 939

957

1.68

2.3

Standard drive
Oversized drive

RT-SVX19A-E4

Installation
Table 19 - WK 155 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

6800

566

7650

571 0.82 604

8500

0.7

599 0.77 632 0.85 664 0.93 696

1.02

727

1.11

757

1.2

0.9

634 0.99 664

1.07

694

1.16

723

1.25

751

1.34

779

1.44

578 0.95 612

1.05

644

1.15

673

1.25

700

1.34

727

1.43

754

1.53

780

1.63

806

1.73

1.65

764

1.75

788

1.86

813

1.96

837 2.07

9350

586

1.09

622

1.22

655

1.33

685

1.44

712

1.55

739

10200

633

1.39

667

1.53

698

1.66

726

1.78

753

1.9

778 2.02 803 2.13 826 2.24 848 2.35 871 2.47

External Static Pressure (Pa)
275

300

325

350

375

400

425

450

475

500

m3/h

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

6800

787 1.29

816

1.38

843

1.47

7650

807 1.54

834

1.64

861

1.74

8500

832 1.83

857

1.94

882 2.04

9350

861 2.18 884 2.29

10200

893 2.58
Standard drive
Oversized drive

Table 20 - WK 200 External static pressure
External Static Pressure (Pa)
25
m3/h

100

125

150

175

200

225

250

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

8970
10090
11210

540

1.42

521

1.01

550

1.12

579

1.24

608

1.36

636

1.49

664

1.62

691

1.76

529

1.2

557

1.32

584

1.44

610

1.56

636

1.68

662

1.82

687

1.95

712

2.1

569

1.56

595

1.69

621

1.82

645

1.95

669 2.08 692 2.22 715 2.36 738 2.51

1.98

635 2.13 659 2.27 681 2.41 704 2.55 725

12330

552

1.66

582

1.82

610

13450

597

2.11

625

2.3

651 2.47 675 2.64 698

2.8

14570

638 2.59 666

2.8

692 3.01

3.39 762 3.58 783 3.75 803 3.92

15690

677

16810

715 3.66

3.1

716

3.2

740

720 2.95

741

3.11

2.7

747

2.85 768

761 3.26 781 3.42 801 3.58

707 3.37 735 3.61 761 3.85
748

3.98
External Static Pressure (Pa)

275
m3/h

300

325

350

375

400

425

450

475

500

RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW)

8970

717

10090

737 2.25

1.9

742

2.04

766

761

2.4

785 2.56 808 2.71 830 2.87

11210

761 2.66 784 2.82 806 2.98 828 3.15

12330

789 3.16

13450

820 3.75 840 3.91

810

2.17

789 2.31

811

2.45 833 2.58

3.32 831 3.49

14570
15690
16810
Standard drive
Oversized drive

RT-SVX19A-E4

Installation
Electrical connection

Over current protection

The electric panel is located in the
unit compressor section. Remove
the compressor access panel. The
unit is designed to run with 400 V
+/- 5%/50 Hz/ 3 ph.

The branch circuit feeding the unit
must be protected in accordance
with national or local codes and
max unit amps indicated in Table 21
to 28.

Factory supplied Disconnect switch
(Option)

Power wiring

The disconnect switch is factory
mounted. It is located on the side of
the Electrical panel and equipped
with fuses as standard.

The unit power supply must be
provided by 4-wire cable with crosssectional areas complying with
legislation.
The power supply cables must be
laid in leak-tight pipes and pass
through the bottom of the electric
panel. The cables must not be taut.
Appropriate connectors must be
provided. Flexible pipe supports are
required to prevent noise
transmission in the building
structure. Ensure all the connections
are tightened.

Figure 10 - Power supply

TKD/TKH, WKD/WKH units:

Note:
1. earthing must be executed in
accordance with local legislation.
2. the machines are designed for a
short-circuit current of 10 kA. In
the event of a higher application,
contact your Trane sales office.

YKD/YKH units:

1 = Power supply from the bottom or from the side.

RT-SVX19A-E4

Installation
Scroll compressors
Compressor electrical phasing
Proper phasing of the electrical
power wiring is critical for proper
operation and reliability of the scroll
compressor and fans.
Proper rotation of the scroll
compressor must be established
before the unit is started. This is
accomplished by confirming that
the electrical phase sequence of the
power supply is correct. The motor
is internally connected for clockwise
rotation with the inlet power supply
phased A, B, C.

Electrical Characteristics Unit amps

UNIT

MPS

Without Electric heat option
TKD/H 155
400/3/50
TKD/H 175
400/3/50
TKD/H 200
400/3/50
TKD/H 250
400/3/50
WKD/H 125
400/3/50
WKD/H 155
400/3/50
WKD/H 200
400/3/50
YKD/H 155
400/3/50
YKD/H 175
400/3/50
YKD/H 200
400/3/50
YKD/H 250
400/3/50
With Electric heat
TKD/H 155
400/3/50
TKD/H 175
400/3/50
TKD/H 200
400/3/50
TKD/H 250
400/3/50
WKD/H 125
400/3/50
WKD/H 155
400/3/50
WKD/H 200
400/3/50

RT-SVX19A-E4

The "ABC" indicator on the face of
the phase indicator will glow if
phase is ABC for terminals L1, L2,
L3.
CAUTION! After completion of
wiring, check all electrical
connections, and ensure all
connections are tight. Replace and
secure all electrical box covers and
access doors before leaving unit or
connecting power to circuit
supplying unit.
CAUTION! Units with Scroll
compressors are not equipped with
crankcase heaters.

Table 21 - Electrical data - YKD/YKH Unit Wiring

Standard Evaporator
Fan Motor

The direction of rotation may be
reversed by interchanging any two
of the line wires. It is this possible
interchange of wiring that makes a
phase sequence indicator necessary
if the operator is to quickly
determine the phase rotation of the
compressor motor.

Oversized Evaporator
Fan Motor

Minimum
Circuit
Ampacity

Maximum
Overcurrent
Protective
Device (Fuse
or Circuit
Breaker)

Minimum
circuit
ampacity

Maximum
Overcurrent
Protective
Device (Fuse
or Circuit
Breaker)

35
41
44
46.4
31.9
35.1
50.4
35.6
42.3
44.6
46.4

50
50
63
63
40
50
63
50
50
63
63

36.9
41.9
44.5
33.8
37
50.9
37.5
43.2
45.1
-

50
50
63
40
50
63
50
50
63
-

41
43
61
62
68
71.2
104.5

63
63
80
80
80
80
125

43
43
61
69.9
73.1
105

63
63
80
80
80
125

WARNING !
Disconnect all power,including
remote disconnects, and discharge
all capacitors before servicing.
Follow proper lockout/tagout
procedures to ensure the power
cannot be inadvertently energized.
After power is removed, allow
4 minutes for capacitors to
discharge. Verify with an
appropriate voltmeter that all
capacitors have discharged. Failure
to disconnect power and/or
discharge capacitors before
servicing could result in death or
serious injury. For additional
information regarding the safe
discharge of capacitors, see Trane
Service Bulletin PROD-SVB06A.

Installation
Table 22 - Electrical data - TKD/TKH Compressor motor and condenser motor
YKD/H

YKD/H

155

175

200

250

Compressor
Number
Type
Model

Scroll

9T / 5T

10T / 6.7T

9T / 9T

10T / 10T

Nominal Amps (1)

(A)

15.0 / 8.5

15.1 / 11.4

14.7 / 14.7

15.3 / 15.3

Locked rotor Amps (2)

(A)

118 / 65.5

118 / 101

118 / 118

Nominal Airflow

(m3/h)

15350

19750

21000

23500

Axial

660

710

Direct

Outdoor Fan
Type
Diameter

(mm)

Drive type
Number / Voltage

0.25

0.56

1.6

2.3

Motor HP

(kW)

Motor Rated Amps (1)

(A)

Motor Locked rotor Amps (2)

(A)

3.8

5.8

Motor RPM

(rpm)

925

TKD/H

175

200

250

(1) At Eurovent rating conditions : Indoor return Air (27°C DB / 19°C WB) - Ambiant 35°C
(2) per motor

Table 23 - Electrical data - YKD/YKH Compressor motor and condenser motor
TKD/H
155
Compressor
Number
Type
Model

Scroll

9T / 5T

10T / 6.7T

9T / 9T

10T / 10T

Rated Amps (1)

(A)

15.0 / 8.5

15.1 / 11.4

14.7 / 14.7

15.3 / 15.3

Locked rotor Amps (2)

(A)

118 / 65.5

118 / 101

118 / 118

Nominal Airflow

(m3/h)

15350

19750

21000

23500

Axial

660

710

Direct

Outdoor Fan
Type
Diameter

(mm)

Drive type
Number

0.25

0.56

1.6

2.3

3.8

5.8

925

Motor HP

(kW)

Motor Rated Amps (1)

(A)

Motor Locked rotor Amps (2)

(A)

Motor RPM

(rpm)

925

(1) At Eurovent rating conditions : Indoor return Air (27°C DB / 19°C WB) - Ambiant 35°C
(2) per motor

RT-SVX19A-E4

Installation
Table 24 - Electrical data - WKD/WKH Compressor motor and condenser motor
WKD/H

WKD/H

125

155

200

Compressor
Number
Type
Model

Scroll

6T / 6T

7.5T /7.5T

10T / 10T

Rated Amps (1)

(A)

10.0 / 10.0

12.1 / 12.1

17.5 / 17.5

Locked rotor Amps (2)

(A)

74 / 74

79 / 79

98 / 98

Nominal Airflow

(m3/h)

15300

15850

23600

Axial

660

710

Direct

Outdoor Fan
Type
Diameter

(mm)

Drive type
Number

0.25

0.56

1.6

2.3

Motor HP

(kW)

Motor Rated Amps (1)

(A)

Motor Locked rotor Amps (2)

(A)

3.8

5.8

Motor RPM

(rpm)

925

950

(1) At Eurovent rating conditions : Indoor return Air (27°C DB / 19°C WB) - Ambiant 35°C
(2) per motor

Table 25 - Electrical data - TKD/TKH Supply fan motor
YKD/H

YKD/H

155

175

200

250
14100

Indoor Fan
Nominal Airflow

(m3/h)

8500

9850

11210

Static pressure available (4)

(Pa)

150

175

Maximum static pressure available (5)

(Pa)

350

375

450

375

FC Centrifugal

15" / 15"

18" / 18"

Belt

1
4.6 / -

Type
Diameter / Width

(in / in)

Drive type
Number

Motor HP (Standard/Oversized)

(kW)

2.2 / 3.0

3.0 / 4.6

Motor Rated Amps (Standard/Oversized)

(A)

4.6 / 6.5

6.5 / 9.0

9/-

Motor Locked rotor Amps (Standard/Oversized) (A)

36.4 / 57

57 / 71.9

71.9 / -

1450 / 2870

2870 / 2900

2900 / -

Motor RPM (Standard/Oversized)

(rpm)

(4) At the nominal airflow with standard drive
(5) At the nominal airflow with oversized drive when available

RT-SVX19A-E4

Installation
Table 26 - Electrical data - YKD/YKH Supply fan motor
TKD/H

TKD/H

155

175

200

250

8500

9850

11210

14100

Indoor Fan
Nominal Airflow

(m3/h)

Static pressure available (4)

(Pa)

175

250

200

125

Maximum static pressure available (5)

(Pa)

325

400

375

350

FC Centrifugal

15" / 15"

18" / 18"

Belt

2.2 / 3.0

3.0 / 4.6

4.6 / -

Type
Diameter / Width

(in / in)

Drive type
Number

Motor HP (Standard/Oversized)

(kW)

Motor Rated Amps (Standard/Oversized)

(A)

4.6 / 6.5

6.5 / 9.0

9/-

Motor Locked rotor Amps (Standard/Oversized) (A)

36.4 / 57

57 / 71.9

71.9 / -

1450 / 2870

2870 / 2900

2900 / -

Motor RPM (Standard/Oversized)

(rpm)

(4) At the nominal airflow with standard drive
(5) At the nominal airflow with oversized drive when available

Table 27 - Electrical data - WKD/WKH Supply fan motor
WKD/H

WKD/H

125

155

200

Indoor Fan
Nominal Airflow

(m3/h)

7140

8500

11210

Static pressure available (4)

(Pa)

200

175

200

Maximum static pressure available (5)

(Pa)

425

325

350

FC Centrifugal

15" / 15"

18" / 18"

Belt

2.2 / 3.0

3.0 / 4.6

Type
Diameter / Width

(in / in)

Drive type
Number

Motor HP (Standard/Oversized)

(kW)

Motor Rated Amps (Standard/Oversized)

(A)

4.6 / 6.5

6.5 / 9.0

Motor Locked rotor Amps (Standard/Oversized)

(A)

36.4 / 57

57 / 71.9

Motor RPM (Standard/Oversized)

(rpm)

1450 / 2870

2870 / 2900

(4) At the nominal airflow with standard drive
(5) At the nominal airflow with oversized drive when available

Table 28 - Electrical data - Combustion Blower Motorr
YKD/H

YKD/H

155

175

200

250
G350

Gas burner
Heating Models

G350

Heating Input (G20)

(kW)

Heating Output

(kW)

69.3

Steady State Efficiency

(%)

No. Burners

No. Stages

3/4" NPT

Gas Connection Pipe Size

RT-SVX19A-E4

Controls
Control wiring
The control circuit is 24 V AC. Unit
includes a 400/24 V transformer.
WARNING! The unit disconnect
switch must be opened and locked
open. Risk of injury and
electrocution.
CAUTION! The unit 24 V transformer
must not be used to power
accessories mounted on site, other
than those proposed by Trane.
Unit controlled by thermostat
Figure 11 - Thermostat wiring
RTRM
3J6
7
THP03
SR6

1
2

10
11
12
14

7
8
9
10
11
12
14

1
SR6

3J6

1
2

1
2
3
1

THS03

4
5
6
7
8
9
10

(WH)

THA01

(GN)

(RD)

(BK)

1
2
3
4
5
6
7
8
9
10

1
2
3
4
5
6
7
8
9
10
11
12
14

RTRM

Trane THS01,THS02, THP01 and
THP02 Thermostats are directly
connected to RTRM board
(J7 connector). TRANE THS02 and
THP03 thermostats are directly
connected to RTRM board
(J6 connector).
Install the electrical link between the
thermostat (thermostat terminal
strip) and the unit (J6 or J7
connector) in compliance with the
interconnection diagram. The low
voltage wiring must not be laid in
the same pipes as the power cables.
The sizes and lengths of the
thermostat connection wires are
given in Table 29. The total
resistance of these control cables
must not exceed 5 ohms. If the
resistance exceeds this value the
thermostat may not operate with
the same precision.
Table 29 - Zone sensor wire size and
maximum length

Maximum length

3
4
5

Zone sensor wire size

6
7
8
9
10
11
12

RTRM

THS02
4239070

THP02
4240530

Y1
Y2
R

THS01
4239060
THP01
4240520

0.33

Conventionnal
thermostat
THS/THP 01-02

0.5

0.75

115

1.3

185

300

0.33

0.5

0.75

1.3

COM
3J7

W1
W2
G

Y1
Y2
R

24V
24V(C)

RT-SVX19A-E4

3J7

24V
24V(C)

Maximum
wire lengh
(m)

THS/THP 03

Wire
size
(mm²)

RTRM

COM

Controls
Unit controlled by BAS
Each unit must be equipped with a
TCI-R board. A communication bus
(twisted shielded pair) must link
each TCI-R to the Trane Roof Top
Manager (RTM) or to the
communication gateway (in the
case of an external BAS). Connect
one temperature sensor to each
unit. LonTalk® communication
interface LTCl-R board allows ICS
communication between a
ReliaTel™ unit and LonTalk®
communication applications.

Unit controlled by Tracker™
supervisor
The units must also be equipped
with the TCI-R communication
board. One remote sensor is
required on each unit for a constant
flow volume. In the case of a
variable flow installation
(VariTrac™) these sensors must not
be installed. A twisted shielded pair
must be used for the
communication link. The main
functions of the Tracker™ supervisor
are control of setpoints, timetable
management (Programming) and
display of faults. For more details
refer to the supervisor
documentation.

RT-SVX19A-E4

Controls
CO2 sensors
Wall-mounted and duct-mounted
CO2 sensors

Table 30 - Specifications
WaII-mounted
Measuring range CO2

Accuracy at 25°C

Non-linearity

Duct-mounted
0-200 ppm
<+/- [30 ppm CO2
+ 2%
of reading]
(included
repeatability and
caiibration
uncertainty)

<+/- [40 ppm CO2 +
3%
of reading]
(included repeatability
and calibration
uncertainty)
<1.0% full scale

Ternperature dependence
of output

0.3% full scale/°C

Long-term stability

<5.0% fulI scale /
5 years

Recomrnended
calibration interval

5 years

Response time

1 minute (0-63%)

Operating temperature

15-35°C

Storage temperature

-20-70°C

Humidity range

0-85% relative
humidity

Airflow range
Output signals (jumper
selectable)
Resolution of anaIog
outputs
Recomrnended external
load

- 5-45°C

0-10 m/s)
0-10Vdc
10 ppm CO2
Current output:
max 500
Voltage output:
min. 1000

Power supply
Power consumption

RT-SVX19A-E4

Nominal 24Vac
<5 VA

Warm-up time

<15 minutes

Dimensions (mm)

108 x 80 x 36

80 x 80 x 200

Controls
Power supply requirements
CAUTION! Make sure that you
connect the power wire only to the
24V terminal. Connecting the power
wire to the output terminal may
result in equipment damage.
The CO2 sensor is designed to
operate with a nominal 24 Vac
supply. The power supply should
maintain the voltage between 20 to
26 Vac.

To connect the wall mounted CO2
sensor, Refer to the wiring diagram
provided in the unit.

Table 31 - CO2 sensor wire size
Cross
Maximum wire
section
Iength
(mm2)

(mn)

0.25

0.5

100

200

Wiring the wall-mounted CO2
sensor
DVC setpoint potentiometer on
economizer module can be adjusted
as follows:
0% - 500ppm, 50% - 1000 ppm,
100% - 1500ppm
The outside air damper will
modulate from minimum position
setting to up to 100% while
attempting to maintain the CO2
setpoint.

Wiring the duct-mounted CO2
sensor
1. Connect the DCV signal lwire to
the connector DCV of the ECA
2. Connect the power according to
the guidelines in Power supply
requirements.

Mounting the wall-mounted sensor
1. Select a proper location in the
room to mount the CO2 sensor.
Look for an interior wall with
good air circulation,
approximately 1.4 m from the
floor.
2. Remove the back plate from the
sensor and thread the power
wires and output signal wire
through the hole in the back
plate.
For surface wiring, make cutouts with pliers to the thinner
section of the upper or lower
edge of the back plate and to
thread the wires through.
3. Mount the back plate to the wall
with screws. Note that the arrow
on the back plate shows the
mounting direction.

To connect the wall mounted CO2
sensor, Refer to the wiring diagram
provided in the unit.

Figure 12 - Jumper settings
OUTPUT
SELECTION
JUMPERS

RT-SVX19A-E4

Controls
Mounting the duct-mounted CO2
sensor
1. Select a proper location on the
duct to mount the CO2 sensor.
2. Drill a 22-25 mm hole in the
mounting surface for sensor
insertion (Figure 13).
3. Attach the mounting plate to the
duct wall with four screws.
4. Insert the sensor through the
mounting plate, adjusting the
depth for optimal air sensing.

CO2 sensor maintenance
This CO2 sensor has excellent
stability and requires no
maintenance. In most environments
the recommended calibration
interval is five years. A trained
service technician can use a
portable CO2 meter to certify sensor
calibration. If, when checking the
sensor, the reading differs too much
from the reference value, the sensor
can be recalibrated in the field. A
calibration kit, software, and
calibration gases are required. If
certified accuracy is required, the
sensor must be calibrated against
accurate and traceable calibration
gases in a laboratory. Consult Trane
BAS for further details.

Figure 13 - Duct-mounted CO2 sensor

15/8 in. ( 42 mm)
7 /8

in. (2 2 mm)

15/8 in.
(42 mm)

Figure 14 - Duct-mounted CO2 insertion depth

21/2 in. (64 mm)

RT-SVX19A-E4

31/8 - 51/2 in. (80 - 140 mm )

Controls
Remote potentiometer
To install the remote potentiometer,
cut the jumper WL on the
economizer ECA board, and connect
the wires to P and P1.
Note: This potentiometer allows to
adjust the permanent fresh air
intake from 0 to 50%.

Note: This potentiometer allows to
adjust the permanent fresh air
intake from 0 to 50%.
0 W corresponds to closed fresh air
damper.
270 W corresponds to 50% open
fresh air damper.

0 W corresponds to closed fresh air
damper.
270 W corresponds to 50% open
fresh air damper.

Figure 15 - Remote potentiometer dimensions

Figure 16 - Remote potentiometer wiring

1 = Remote potentiometer
2 = ECA Board
WH = White wire
RD = Red Wire
BU = Blue wire
_____ Factory wiring
-------- Field wiring

RT-SVX19A-E4

Controls
Fire thermostat
There are two sensors in the fire
thermostat Kit: Sensor X1310004001 is factory-set to open at 57°C.
Sensor X13100040-02 is set to open
at 115°C.
Sensors are mounted directly in the
ductwork. They should be installed
where elements can respond quickly
to air temperature changes. If not
possible, the sensor may be
installed on a suitable bracket so
the air is drawn across the element.
Sensor X13100040-01 has to be
mounted in the return air duct.
Sensor X13100040-02 has to be
mounted in the supply air duct.

Note: Do not permit element guard
to touch internal parts. Do not
locate sensor where the air
circulation is restricted by baffles.
Connection of the fire thermostat
with TCI board : Refer to the wiring
diagram provided in the unit.
Connection without TCI board
Connect according to the standard
wiring diagram provided on the
unit.
Remove sensor cover and fasten
control securely with screws. Loads
connected must not exceed 2 amps,
30V Ac.

Figure 17 - Duct mounting of fire thermostat

1 = Fire thermostat
2 = Hole in the duct

RT-SVX19A-E4

Controls
Clogged filter detector
This device is mounted in the filter
section. The sensor measures the
difference in pressure before and
after the filter section. The
information is sent to the THP03
thermostat, to a Tracker™ or to a
BMS.

Smoke detector
This device is used to detect smoke
in the air stream. It includes a
factory mounted detector connected
to a central panel, both fitted in the
fan section.
When smoke is detected, it shuts off
the unit. A dry contact is available
on the control panel for a remote
default.

High temperature safety
thermostat

Thermostats

This additional safety device is a
manual reset thermostat for gas
fired units (YKD/YKH), required
mainly by the French ERP
regulation. It is located in the gas
burner section. It stops the gas
burner and the supply air fan when
the supply air temperature rises to
120°C.

THS01/THP01, THS02/THP02 and
THS03/THP03.

6 thermostats are available:

"THS" are non programmable
thermostats, "THP" are
programmable.
01 and 02 series are conventional
thermostat, 03 series are dedicated
to the controller.

Remote fault relay
This is a factory mounted relay used
to send alarm signals (dry contact)
to a local BMS or a local control
panel. With this relay, the
compressor, heating, fan and power
supply alarm output signals from
the controller are reported to a
single dry contact.

Table 32 - Thermostats features
THS01

THP01

THS02

THP02

THS03

THP03

non-programmable

programmable

electronic

Reliatel

unit control type design

electromech.

interface card needed

CTI*

none

for Cooling Only units

for Heat Pump units

for Gas Fired units

Cooling stages

auxiliary heating stages
(elec. heater, HWC )

none

heating stages
(heat pump mode)
liquid crystal display

*some important features are lost while using the CTI card.
Note: thermostats are powered up by the rooftop control (24V)

RT-SVX19A-E4

Controls
Other accessories available

Communication Interfaces

Remote temperature sensor to be
used with THS/THP 01-02

TRANE Communication Interface
(TCI-R) board

TZS01: Remote room temperature
sensor to be used with THS/THP 03,
Tracker or Varitrac systems.

This is an electronic board, factorymounted in the main control panel,
needed to allow communication
between a TRANE Integrated
Comfort system (TRACKER or
Varitrac CCP2) and the unit. (COM3COM4)

DTS: Duct temperature sensor to be
used with THS/THP 03
TZS02: Remote room temperature
sensor with adjustable thumwheel
setpoint to be used with Tracker or
Varitrac systems
TZS04: Room temperature sensor
with adjustable thumbwheel and
override button, to be used with
Tracker or Varitrac systems
Refer to separate documentation for
more information.

LON Communication Interface
(LCI-R) board
This is an electronic board, factorymounted in the main control panel,
needed to allow communication on
a LonTalk® Network at the unit level.
LonTalk®. Communication Interface
(LCI-R) board
This interface board allows Voyager
units to communicate on a LonTalk®
Network at the unit level. Network
variables are based on the
LonMark®. Space Comfort Controller
Functional Profile Template. The LCIV uses a Free Topology transceiver
FTT-10A. The FTT-10A transceiver
supports non-polarity sensitive, free
topology wiring, allowing the
system installer to use star, bus,
and loop architecture. The LCI-V can
also be connected to an optional
High Temperature Limit Switch if
installed with the rooftop unit. For
more information, see attached
manual LTCI-IN-1.

RT-SVX19A-E4

Unit Options
Hot water coil
(Down flow units only)
In order to prevent water to freeze
up in the coil during unoccupied
period or shutdown limited period,
a thermostat opens when there is a
risk of freeze-up. The services of a
water treatment specialist are
recommended if water used can
cause scaling deposits or erosion.
Insulate all the water piping likely to
be exposed to freezing
temperatures in order to avoid
freeze up of the coil and heat losses.
The water distribution network must
be fitted with vents in places where
air is likely to be trapped.
The hot water coil is factory
mounted in the discharge section.
Two holes are provided to connect
the hot water coil. They are located
at the base of the unit. Remove the
central panel to access the coil,
using an 8 mm wrench (the bolts
are located on the bottom part of
the panels). The tubes for entering
and leaving water are equipped
with a threaded female connector.

Hot water coil: Installation and
connection
In order to prevent water to freeze
up in the coil during unoccupied
period or shutdown limited period,
it is recommended to use ethylene
glycol. The services of a water
treatment specialist are
recommended if water used can
cause scaling deposits or erosion.
Insulate all the water piping likely to
be exposed to freezing
temperatures in order to avoid
freeze up of the coil and heat losses.
The water distribution network must
be fitted with vents in places where
air is likely to be trapped.
Table 33 - Ethylene glycol percentage
Ethylene glycol
percentage

Freezing point

(%)

(°C)

-4

-10

Water connection inlet/outlet: 1 ¼"
ISO R7.

Figure 18 - Hot water coil connections

RT-SVX19A-E4

Unit Options
Electric Heater

Soft Starter

Electric heaters are fitted on the fan
discharge.

The soft starter is used to achieve a
progressive supply fan start and a
reduced starting current as well as
the motor starting torque. This
option is well adapted for textile
duct applications. It is factory
installed in the main control panel.

Heaters have two heating stages
and provided with two types of
overheat thermostats:
• Automatic reset thermostats
which stop the electric heater
when the air temperature rises to
76°C. Automatic reset at 60°C. No
alarm output available.
• The manual reset thermostat
which stop the unit when the air
temperature rises to 120°C. No
alarm output available.

The soft starter gradually increases
the voltage of the supply fan motor
until it reaches full line voltage.
The starting time can be adjusted
from 0 to 64 seconds but the soft
starter is factory set to the
maximum starting time value,
64 seconds.

Figure 19 - Soft starter
1

Supply

Start / Line
Stop / Load

Urg.
Stop

Motor
Softstarter

Ctrl
Byp.

Diag.
INITAL
TORQUE

Time(s)

1
2
3
4
5
6
RT-SVX19A-E4

= Three phase mains connections
= Motor connections
= Settings
= Status outputs
= Controls
= LEDs
41

Unit Options
0 - 25% fresh air hood

This option includes for the hood
itself, a wire mesh and a slidable
damper.

The 0-25% fresh air hood allows to
introduce fresh air into the unit.

The slidable damper has to be
adjusted manually by removing the
screws and sliding it off up or down
(Figure 20).

This is a manual device fitted on the
back of the unit, sized for a
maximum of 25% of the nominal
rooftop air flow.

The amount of fresh air introduced
is then permanently fixed.

210

Figure 20 - 0-25% manual fresh air hood

485

1 = Intake hood
2 = Wire mesh
3 = Slidable damper

RT-SVX19A-E4

Unit Options
Barometric relief

This option includes exhaust hoods
and gravity dampers located in the
return air section (Figure 22). When
the pressure of the building
increase, the gravity dampers open
and relieve air to the outside.

The barometric relief allows to
minimize overpressure in the
building caused by the introduction
of fresh air. This option is typically
installed when fresh air intake is
below 25% of the nominal air flow
and when the return air pressure
drop is below 25Pa.

If the return air duct pressure drop
is higher than the building
overpressure, the gravity dampers
will not open.
If the return air duct pressure drop
is lower than the building
overpressure, the gravity dampers
will open and releive air outside of
the building.

Figure 21 - Economizer flow chart with barometric relief

S
R

S
E
R
F
Downflow version

F
Horizontal flow version

R = return
S = supply
F = fresh air
E = exhaust

RT-SVX19A-E4

Operation
Operation with a
conventional thermostat

•

The ReliaTel module has
conventional thermostat
connections as well as Zone Sensor
Module connections. When a
conventional thermostat is
controlling the unit, operation
differs as follows.
• Supply Air Tempering feature is
not available. If outdoor air is
being introduced through the
equipment, discharge air
temperature may be cold when
not actively heating.
• Proportional Integral (PI) control
is not available.
• Zone Sensor Diagnostics are
only available on the RTRM
module on the J6 terminals,
instead of at the Zone Sensor in
the space.
• Intelligent Fall-Back is not
available. If a failure occurs in
the device controlling the
equipment, operation will cease.
• Heat Pump Smart Recovery and
Smart Staging is not available.
Heat Pump operation becomes
more costly unless the generic
control being applied can
accomplish this.

•

Remote Sensing Capabilities are
not available on most
mechanical thermostats.
Space Temperature Averaging
capabilities are not available on
most mechanical thermostats.
27½ to 50 VAV – Conventional
thermostat input terminals are
inactive.
Built in Night Set Back and
Unoccupied Functions function
differently with a conventional
mechanical thermostat.
A built-in algorithm which allows
for automatic reset of the
discharge air temperature while
economizing is not available.

The terminal strip for attaching the
thermostat wires is located on the
RTRM module in the control
compartment.
The purpose of each terminal is
discussed in the next section.
COM
T
X2
Y2
W2
G
W1/0
Y1
R

Customers occasionally require
operation with a conventional
thermostat rather than a zone
sensor. In some cases there is a
preference for a specific thermostat
model, and in others there is
reluctance to adopt newer
technology that may not be as well
understood as conventional
thermostats. In addition, non-Trane
Building Controllers typically
provide an interface to HVAC
equipment based on a conventional
thermostat interface. Units applied
with this type of controller need to
accept conventional thermostat
inputs.
Conventional thermostat signals
represent direct calls for unit
functions. In their simplest
applications, thermostat contacts
directly control contactors or other
load switching devices. This function
provides inputs for the thermostat
signals and processing to enhance
reliability and performance.
Compressor protection and
reliability enhancement functions
(HPC, LPC, Minimum On/Off timers,
etc.). All operate the same whether
applied with zone sensors or a
conventional thermostat.
Logic is also provided to cause
appropriate unit functions when
inappropriate thermostat signals are
provided. Simultaneous calls for
heating and cooling will be ignored,
and the fan will be turned on with a
call for heating or cooling even if
the fan request is not detected.
If the thermostat is immediately
changed from a heating to a cooling
call, or vice versa, there will be a
five minute delay before the new
call will initiate.

RT-SVX19A-E4

Operation
Thermostat signals are as follows:
R 24VAC power to thermostat
Y1 Call for compressor 1 or first
stage cooling
Y2 Call for compressor 2 or 2nd
stage cooling
G Call for supply fan
W1 Call for heat 1
W2 Call for heat 2

Conventional thermostat –
Gas/ Electric, Electric Heat:
Function when
Input/connection energized :
G (fan)
Fan runs continuously
except during
unoccupied mode
(see next page)
Y1 (compressor 1 Compressor #1 runs
or economizer)
or economizer
operates

Heat pump only:
X2 Call for emergency heat
O Switchover valve On = cooling,
Off = heating
T Bias for heat anticipation for those
mechanical thermostats that use
this function

Y2 (compressor 2 Compressor #2 also
or compressor 1 runs, or #1
while economizing) compressor runs
while economizing
W1 (gas / electric 1st stage heat
heat first stage)
W2 (gas / electric 2nd stage heat (if
heat 2nd stage)
available)

Conventional thermostat –
Heat Pump
Function when
Input/connection energized
Cooling mode:
G (fan)

Fan runs continuously
except during
unoccupied mode
(see next page)

O (reversing valve Reversing valve in
during cooling)
cool mode
Y1 + O
Compressor #1 runs
(first stage cooling) or economizer
operates
Y1 + Y2 + O
Compressor #2 also
(2nd stage cool)
runs, or #1
compressor runs
while economizing.
Heating mode:
G (fan)

Fan runs continuously
except during
unoccupied mode
(see below)

Y1 (both
Both compressors
compressors 1st run
stage heat)
Y2 (during heating No change
– nothing happens)
W2 (electric heat
2nd stage)

2nd stage (electric)
heat

X2 (electric heat
only)

Electric heat only –
no compressors

T (provides heat anticipation signal for
those mechanical thermostats that use this
feature. If the thermostat used does not
have a “T” terminal, disregard this
terminal.

RT-SVX19A-E4

Operation
Unoccupied mode:

Cooling/Economizer Operation:

If the thermostat being used is
programmable, it will have its own
strategy for unoccupied mode and
will control the unit directly. If a
mechanical thermostat is being
used, a field applied time clock with
relay contacts connected to J6-11
and J6-12 can initiate an
unoccupied mode as follows:
• Contacts open: Normal occupied
operation.
• Contacts closed: Unoccupied
operation as follows - Fan in
auto mode regardless of fan
switch position. Economizer
closes except while economizing
regardless of minimum position
setting.

If unit does not have an economizer,
the Cool/Econ Stage 1 and Stage 2
will call directly for mechanical
cooling (compressor) stages. If the
unit has an economizer, the
Cool/Econ stages will function as
follows.

Table 34 - Cooling/Economizer Operation with Thermostat1,2
OK to
Thermostat Thermostat Call for Economizer
Economize?
Y1
Y2
Cooling

Compressor Staging
Request

Off

Inactive

Compressor Output 1

Off

Inactive

Compressor Output 2

Inactive

Compressor
Outputs 1 & 2

Yes

Off

Active

Off

Yes

Off

Active

Compressor off

Yes

Active

Compessor

RT-SVX19A-E4

Operation
Setting the economizer
or 0-50% motorized hood
(option)
The ECA board is mounted on the
damper actuator. To access the ECA
board on economizers:
• Remove the access panel located
on the economizer section.
• The electrical power must be
disconnected to set the
minimum position and check the
economizer.
• Disconnect the power supply,
put the thermostat fan selector
to "ON" and the "HEAT/COOL"
selector to "OFF". This puts the
damper in the minimum
ventilation position.
• To set the required minimum
ventilation air position, turn the
dial on the ECA clockwise to
increase ventilation, or anticlockwise to decrease ventilation.
The damper will open at this
setting whenever the fan circuit
is powered up.
• When the arrow on the dial
adjustment screw is pointing to 8
o'clock, the minimum position is
roughly 0%. When the dial is
pointing to 12 o'clock it is
roughly 25%, and when the dial
is pointing to 4 o'clock it is
roughly 50%

Table 35 - ECA board LED
OFF:

No Power or Failure

ON:

Normal, OK to Economize

Slow Flash:

Normal, Not OK to
Economize

Fast Flash:

Communications Failure

Pulse Flash: Error Code:
1 Flash:

Actuator Fault

2 Flashes:

C02 Sensor

3 Flashes:

RA Humidity Sensor

4 Flashes

RATemp Sensor

5 Flashes:

OA Quality Sensor

6 Flashes:

OA Humidity Sensor

7 Flashes:

OATernp Sensor

8 Flashes:

MATemp Sensor

9 Flashes:

RAM Fault

10 Flashes:

ROM Fault

11 Flashes:

EEPROM Fault

While setting the minimum position
the damper may move toward the
new setting in several small steps.
Once the damper has remained in
the same position for 10 to
15 seconds it can be assumed it is
in the new position.

To check the damper is functioning
correctly, the ECA is equipped with
an indicator light in the middle of
the board. This light operates as in
Table 35.

RT-SVX19A-E4

Operation
Figure 22 - Minimum fresh air adjustment
+

1
EXF
2
1
MAT
2

MIXED
SENSOR
MIXED
AIR AIR
SENSOR
INPUT
INPUT COMMO
COMMON
OMMON
COMMON
OMMON
COMMO
OHS
OHS INPUT
INPUT

1 OAH
AH/
2 OAE

NOT
TUSED-OAT
USEDOAT
T ISIS
NOT
CONNECTED
ONNECTED
TO
O RTR
TRM
CONNECTED
TO

1
OAT
2

RA
INPUT
RA
A INPU
T
COMMON
COMMO
OMMON

1
RAT
2

COMMON
COMMO
OMMON
RHS
RHSINPUT
INPUT

1 RAH
AH/
2 RAE

CO
INPUT
CO2
O2
SENSOR
INPU
T
2 SENSOR
COMMON
COMMO
OMMON

1
DCV
2

2-10 VDC
+
FEEDBACK
FEEDBACK
INPUT
INPUT
2-10VDC
VDC
2-10
CONT
ONTROL
CONTROL
OUTPUT
OUTPUT

MIN
MIN POS.
POS.
SETPOINT
SETPOINT
0-50%
0-50%

ABCD
ABCD
SETTING
TINGS
SETTINGS

+
-

GREEN
GREEN
LED
LED

O2 “PURGE”
GE"
CO2
"PURGE
CO2
SETPOINT
SETPOINT
ADJUSTMENT
ADJUS
TMENT
500-1500
PPM
500-1500 PPM

4 321

POWER
POWER
WEREXHAUST
EXH
AUST
CONTACTS
CON
ONTACTS

- MODBUS
+ MODBUS
COMMON
COMMO
OMMON
24VAC
24VAC
24

SHORTED=CLOSED
SHORTED=C
TED=CLOSE
OSED
OPEN=ON CARD POT.
OPEN=ON OARD
BARD POT.
270 omega = 50%

270 omega = 50%

REMOTE
REMOTE
MINIMUM
MINIMUM
POTENTIOMETER

POTENTIOMETE
TENTIOMETE
R

WHT
WHT
RED
RED
BLUE
BLUE

1 = ECA board

RT-SVX19A-E4

Operation
Test procedures
Operating checklist before start-up
• Unit is level, with sufficient
clearance all round
• Duct network is correctly sized
according to the unit
configuration, insulated, and
water-tight
• Condensate drainage line is
correctly sized, equipped with a
trap, and sloped
• Filters are in position, of correct
size and quantity and clean
• Wiring is correctly sized and
connected in accordance with
wiring diagrams
• Power supply lines are protected
by recommended fuses and
correctly earthed
• Thermostat is correctly wired
and positioned
• Unit is checked for refrigerant
charge and leaks
• Indoor and outdoor fans rotate
freely and are fixed on shafts
• Supply fan rotation speed is set
• Access panels and doors are
replaced to prevent air entering
and risks of injury
• Checking of the gas heating
section, in accordance with
above procedure

RT-SVX19A-E4

WARNING! If any operating checks
must be performed with the unit
operating, it is the technician's
responsibility to recognize any
possible hazards and proceed in a
safe manner. Failure to do so could
result in severe personal injury or
death due to electrical shock or
contact with moving parts.

Test mode procedure at the
ReliaTel™ control board

Power-up initialization

CAUTION! Use one of the following
"Test" procedures to bypass some
time delays and to start the unit at
the control panel.

CAUTION! Before proceeding with
any test procedure or operation,
make sure that crankcase heaters
have been energized for at least 8
hours.
Units equipped with Scroll
compressors do not have crankcase
heaters.
Note:
Upon power initialization, the RTRM
performs self-diagnostic checks to
insure that all internal controls are
functional. It also checks the
configuration parameters against
the components connected to the
system. The Liteport LED located on
the RTRM module is turned "On"
within 1 second of power-up if
internal operation is okay.

Operating the unit from the roof
using the test mode at the
ReliaTel™ control board.
CAUTION! Before proceeding with
the following test procedures, make
sure that thermostat or zone sensor
is off.

Each step of unit operation can be
activated individually by
temporarily shorting across the
"Test" terminals for two to three
seconds. The Liteport LED located
on the RTRM module will blink
when the test mode has been
initiated. The unit can be left in any
"Test" step for up to one hour
before it will automatically
terminate, or it can be terminated
by opening the main power
disconnect switch. Once the test
mode has been terminated, the
Liteport LED will glow continuously
and the unit will revert to the
"System" control.

Operation
Test modes
There are 2 methods in which the
"Test" mode can be cycled with the
test button:
1. Step Test Mode
This method initiates the different
components of the unit, one at a
time, by temporarily shorting across
the two test terminals for two to
three seconds. For the initial startup of the unit, this method allows
the technician to cycle a component
"On" and have up to 1 hour to
complete the check.

2. Auto Test Mode
This method is not recommended
for start-up due to the short timing
between individual component
steps. This method initiates the
different components of the unit,
one at a time, when a jumper is
installed across the test terminals.
The unit will start the first test step
and change to the next step every
30 seconds. At the end of the test
mode, control of the unit will
automatically revert to the applied
"System" control method.
For unit test steps and test modes,
values to cycle the various
components, refer to Table 36.

Table 36 - Service Test Guide for Component Operation on gas-fired units
Step

Mode

Indoor
Fan

Economizer

Compressor
1

Compressor
2

Heat 1

Heat 2

Outdoor 1

Outdoor 2

Fan On

Min

Off

Econ.

Open

Off

CooI1

Min

Off

CooI2

Min

Off

Heat1

Min

Off

Heat2

Min

Off

* With Optional Accessory
** "Off" If temperature falls below 16° (±1°)°C, "On" if temperature rises above 18°(±1°)°C.
Note: Steps for optional accessories and modes not present in unit will be skipped.

RT-SVX19A-E4

Operation
Unit start-up
Verification of gas valve settings (Reserved for the qualified gas
technician)
WARNING! Improper gas valve
setting may lead to burner
destruction and people injury.

Note: Unit to be installed outside
only.
Note: Expansion valve must be
adapted to the type of gas used:
• G 20: 20 mb
• G 25: 25 mb
• G 31 (Propane): 37 or 50 mb

Note: Unit factory-set for G20.

Figure 23 - Gas valve

1
2
3
4
5
6
7
8

RT-SVX19A-E4

= Negative pressure controller
= Safety solenoid valve
= Gas injector
= Air inlets
= To the burner
= Fan
= Gas unit
= Minimum gas pressure cut-out

Operation
Table 37 - Marking category of the gas section in different countries
Country
Category
Type of gas
G20

FR
II2E+3P

CH+ES-GB-IE-PT
II2H3P

IT
II2H3+

NL
II2L3P
Pressure in mbar
-

BE
I2E+ & I3P

LU-DE
I2E & I3P

AT-DK-Fl-SE
I2H

G25

G31

Table 38 - Gas burner data
YK* 155-175-200-225

G350
1

Burner

G350

Natural Gas G20 (20mbar) 34.02 MJ/m3 (15°C-1013)
Gas Flow (15 C-1013 mbar)

(m3/h)

Heating Capacity

(kW)

Heating Rate

(kW)

Efficiency

Smoke analysis

G20 - 20mbar
@ 400V-3-50Hz

Nominal rate
Reduced rate
Nominal rate

8.1
8.13
69.3

Reduced rate

69.1

Nominal rate
Reduced rate
Nominal rate

77
76.8
90

Reduced rate

CO %
Nox ppm

< 0.001%
9 ppm

CO2 %

9.7%

Burner

G350

Natural Gas G25 (20 ou 25 mbar) 29.30 MJ/m3 (15°C-1013)
Gas Flow (15 C-1013 mbar)
Heating Capacity
Heating Rate
Efficiency

Smoke analysis

(m3/h)
(kW)
(kW)
%
G25 - 25mbar
@ 400V-3-50Hz

Nominal rate

8.8

Reduced rate

8.21

Nominal rate

62.9

Reduced rate

59.5

Nominal rate

71.5

Reduced rate

66.8

Nominal rate

Reduced rate

CO %

< 0.001%

Nox ppm

CO2 %

7.4%

Burner
Propane Gas G31 (30, 37ou 50 mbar) 88.00 MJ/m3 (15 C-1013)
Nominal rate
Gas Flow (15 C-1013 mbar)
(m3/h)
Reduced rate
Nominal rate
Gas Flow (15 C-1013 mbar)
(kg/h)
Reduced rate
Nominal rate
Heating Capacity
(kW)
Reduced rate
Nominal rate
Heating Rate
(kW)
Reduced rate
Efficiency

Combustion Air Flow
(Avec E=25%)

(m /h)

Smoke analysis

G31 - 37mbar
@ 400V-3-50Hz

G350
2.7
2.56
5.1
4.9
57.5
55.3
65.3
62.6

Nominal rate

Reduced rate

88.3

Nominal rate

Reduced rate

CO %
Nox ppm

< 0.001%
-

CO2 %

8.9%

RT-SVX19A-E4

Operation
Starting the unit in cooling mode

Operating pressures

Before start-up, ensure that all
power cables are tightened.

After the unit has operated in
cooling mode for a short period of
time, install pressure gauges on the
gauge ports of the discharge and
suction line valves.

Verify that the unit airflow rate is
adjusted according to the
information provided in the "Supply
fan adjustment" section of this
manual.
To start the unit in cooling mode:
• Place the zone sensor system
switch in the "COOL" position.
• Position the cooling setpoint
approximately 10° below room
temperature and place the fan
switch in the "AUTO" or "ON"
position.
• Turn on unit main power supply.
The condenser fan motor,
compressor and supply fan motor
should operate automatically.
There will be a delay of up to
5 minutes before the unit starts in
cooling mode.

Note: To bypass time delays and
verify the operation of this unit from
the roof, use the "Test procedure"
section in this manual. Check the
suction and discharge pressures.
Note: Always route refrigerant
hoses through the port hole
provided and ensure that the
compressor access panel is in place.
Cooling shutdown
To exit the test mode, disconnect
unit power for 3-5 seconds and
reapply. When running the unit
using the zone sensor as the
control, position the selector switch
to "OFF".
There may be a delay of up to
3 minutes before compressors shut
down and an additional one minute
before the fan shuts down in this
setting.
Do not de-energize main power
disconnect except when unit is to
be serviced. Power is required to
keep the compressor crankcase
warm and boil off refrigerant in the
oil (except on units with Scroll
compressors).

RT-SVX19A-E4

Final installation checklist
• Are all power cables tightened?
Check torque of power
cables contact !
• Is the condenser fan and indoor
blower operating correctly, i.e.
correct rotation and without
undue noise?
• Are the compressors operating
correctly and has the system
been checked for leaks?
• Have the voltage and running
currents been checked to
determine if they are within
limits?
• Have the air discharge grilles
been adjusted to balance the
system?
• Has the ductwork been checked
for air leaks and any
condensation?
• Has the air temperature rise
been checked?
• Has the indoor airflow been
checked and adjusted if
necessary?
• Has the unit been checked for
tubing and sheet metal rattles or
any unusual noises?
• Are all covers and panels in
place and properly fastened?

Operation
ReliaTel™ is a microelectronic
control feature, which provides
operating functions that are
significantly different from
conventional electro-mechanical
units. The master module is the
ReliaTel™ Refrigeration Module
(RTRM).
The RTRM provides compressor
antishort cycle timing functions
through minimum "Off" and "On"
timing to increase reliability,
performance and to maximize unit
efficiency.
Upon power initialization, the RTRM
performs self-diagnostic checks to
insure that all internal controls are
functioning. It checks the
configuration parameters against
the components connected to the
system.
The LED located on the RTRM
module is turned "On" within one
second after power-up if all internal
operations are okay.

Cooling without an
Economizer
When the system switch is set to
the "Cool" position and the zone
temperature rises above the cooling
setpoint controlband, the RTRM
energizes the (K9) relay coil located
on the RTRM. When the K9 relay
contacts close, the compressor
contactor (CC1) coil is energized
provided the low pressure control
(LPC1) and high pressure control
(HPC1) are closed. When the CC1
contacts close, compressor (CPR1)
and the outdoor fan motor (ODM)
start to maintain the zone
temperature to within ± 2 F of the
sensor setpoint at the sensed
location.
If the first stage of cooling can not
satisfy the cooling requirement, the
RTRM energizes the (K10) relay coil
located on the RTRM. When the
(K10) relay contacts close, the
compressor contactor (CC2) coil is
energized provided the low
pressure control (LPC2) and high
pressure control (HPC2) are closed.
When the CC2 contacts close,
compressor (CPR2) starts to
maintain the zone temperature to
within ± 2 F of the sensor setpoint
at the sensed location.

Evaporator Fan Operation
When the fan selection switch is set
to the "Auto" position, the RTRM
energizes the (K6) relay coil
approximately one second after
energizing the compressor
contactor coil (CC1) in the cooling
mode. In heating mode, the RTRM
energizes the (K6) relay coil
approximately 45 seconds after gas
ignition. Closing the K6 contacts on
the RTRM energizes the supply fan
relay (F) coil to start the supply fan
motor (IDM).
The RTRM de-energizes the fan
relay (F) approximately 60 seconds
after the cooling requirement has be
satisfied to enhance unit efficiency.
When the heating cycle is
terminated, the supply fan relay (F)
coil is de-energized approximately
90 seconds after the heating
requirement.
When the fan selection switch is set
to the "On" position, the RTRM
keeps the supply fan relay coil (F)
energized for continuous fan motor
operation.
When the unit is equipped with the
optional clogged filter switch, wired
between terminals J7-3 and J7-4 on
the ReliaTel™ Options Module
(RTOM), the RTRM produces an
analog output if the clogged filter
switch (CFS) closes for two minutes
after a request for fan operation.
When the system is connected to a
remote panel, the "SERVICE" LED
will be turned on when this failure
occurs.

RT-SVX19A-E4

Operation
Low Ambient Operation
During low ambient operation,
outside air temperature below 13ºC,
the RTRM will cycle the compressor
and outdoor fan motor "Off" for
approximately three minutes after
every 10 minutes of accumulated
compressor run time. The supply
fan motor (IDM) will continue to
operate during this evaporator
defrost cycle (EDC) and the
compressor and outdoor fan will
return to normal operation once the
defrost cycle has terminated and
the compressor "Off" time delay has
been satisfied.

RT-SVX19A-E4

Cooling with an
Economizer
The economizer is utilized to control
the zone temperature providing the
outside air conditions are suitable.
Outside air is drawn into the unit
through modulating dampers. When
cooling is required and economizing
is possible, the RTRM sends the
cooling request to the unit
economizer actuator (ECA) to open
the economizer damper. The RTRM
tries to cool the zone utilizing the
economizer to slightly below the
zone temperature setpoint. If the
mixed air sensor (MAS) senses that
the mixed air temperature is below
53ºF, the damper modulates toward
the closed position. If the zone
temperature continues to rise above
the zone temperature setpoint
controlband and the economizer
damper is full open, the RTRM
energizes the compressor contactor
(CC1). If the zone temperature
continues to rise above the zone
temperature setpoint controlband
and the economizer damper is fully
open, the RTRM energizes the
compressor contactor (CC2).

The ECA continues to modulate the
economizer damper open/closed to
keep the mixed air temperature that
is calculated by the RTRM.
If economizing is not possible, the
ECA drives the damper to the
minimum position setpoint when
the supply fan relay (F) is energized
and allows mechanical cooling
operation. When the unit is
equipped with the optional fan
failure switch, wired between
terminals J7-5 and J7-6 on the
RTOM, the RTRM will stop all
cooling functions and produce an
analog output if the fan failure
switch (FFS) does not open within
40 seconds after a request for fan
operation. When the system is
connected to a remote panel, the
"SERVICE" LED will flash when this
failure occurs.

Operation
Economizer Set-Up
Adjusting the minimum position
potentiometer located on the unit
economizer Actuator (ECA) sets the
required amount of ventilation air.
Two of the three methods for
determining the suitability of the
outside air can be selected utilizing
the enthalpy potentiometer on the
ECA, as described below:
1. Ambient Temperature controlling the economizing
cycle by sensing the outside air
dry bulb temperature. The Table
below lists the selectable dry
bulb values by potentiometer
setting.
2. Reference Enthalpy - controlling
the economizer cycle by sensing
the outdoor air humidity. The
Table below lists the selectable
enthalpy values by
potentiometer setting.
If the outside air enthalpy value
is less than the selected value,
the economizer is allowed to
operate.

3. Comparative Enthalpy - By
utilizing a humidity sensor and a
temperature sensor in both the
return air stream and the
outdoor air stream, the unit
control processor (RTRM) will be
able to establish which
conditions are best suited for
maintaining the zone
temperature, i.e. indoor
conditions or outdoor conditions.
The potentiometer located on
the ECA is non-functional when
both the temperature and
humidity sensors are installed.
Table 39 - Potentiometer Setting
Potentiometer
Setting

Dry BuIb

Enthalpy

(°C)

(KJ/kg)

23*

*Factory Setting

ReliaTel™ Control Heating
Operation
When the system switch is set to
the "Heat" position and the zone
temperature falls below the heating
setpoint controlband, a heat cycle is
initiated when the RTRM
communicates ignition information
to the Ignition module (IGN).

Ignition Module
Two Stage (IGN) runs self-check
(including verification that the gas
valve is de-energized). (IGN) checks
the high-limit switches (TC01 &
TC02) for normally closed contacts.
With 115 VAC power supplied to the
ignition module (IGN), the hot
surface ignition probe (IP) is
preheated for approximately
45 seconds. The gas valve (GV) is
energized for approximately
7 seconds for trial for ignition, to
ignite the burner.
Once the burner is ignited, the hot
surface ignition probe (IP) is deenergized by the ignition module
(IGN) and functions as the flame
sensing device.
If the burner fails to ignite, the
ignition module will make two more
attempts before locking out. The
green LED will indicate a lock out by
two fast flashes. An ignition lockout
can be reset by:
1. Opening for 3 seconds and
closing the main power
disconnect switch
2. By switching the "Mode" switch
on the zone sensor to "OFF" and
then to the desired position
3. Allowing the ignition control
module to reset automatically
after one hour.

RT-SVX19A-E4

Operation
Refer to the ignition control module
diagnostics section for the LED
diagnostic definitions.

Final installation checklist
•

When the fan selection switch is set
to the "Auto" position, the RTRM
energizes the supply fan relay (F)
coil approximately 30 second after
initiating the heating cycle to start
the supply fan motor (IDM).

•

The automatic reset high limit
(TCO1), located in the bottom right
corner of the burner compartment,
protects against abnormally high
leaving air temperatures.

•

The automatic reset fan fail limit
(TCO2), located in the upper middle
section of the supply fan board,
protects against abnormally high
heat buildup which could occur
because of extended cycling of the
high limit (TCO1) or if the supply
fan motor (IDM) fails to operate.
Should TCO2 open, the RTRM will
energize the supply fan relay (F) in
an attempt to start the fan motor.
The RTRM signals that a heat failure
has occurred by flashing the "Heat"
LED on the zone sensor.
There is a Green LED located in the
Ignition Control Module. The table
below lists the diagnostics and the
status of the LED during the various
operating states.

•

•
•

•

Is the condenser fan and indoor
blower operating correctly, i.e.:
correct rotation and without
undue noise?
Are the compressors operating
correctly and has the system
charge been checked?
Has the gas module been
installed as per the procedure in
this manual?
Have the voltage and running
currents been checked to
determine if they are with in
limits?
Have the air discharge grilles
been adjusted to balance the
system?
Has the ductwork been checked
for air leaks and any
condensation?
Has the heating air temperature
rise been checked?
Has the indoor airflow been
checked and adjusted if
necessary?
Has the unit been checked for
tubing and sheet metal rattles
orany unusual noises?
Are all covers and panels in
placeand properly fastened?

To keep the unit operating safely
and efficiently, the manufacturer
recommends that a qualified service
technician check the entire system
at least once each year, or more
frequently if conditions warrant.

Table 40 -LED status
Diagnostics
1. Powered but no heat dernand
2. Heat demand without fault
3. No flame detection on ignition - or signal detected
and then lost
4. Gas unit incorrectly wired or flame signal detected on
a heat demand
5. Internal fault

RT-SVX19A-E4

Green LED

Red LED

Off

Flash ing

Off

Flashing

Steady

Flashing

Off

Steady

Maintenance
End user routine
maintenance

Some of the periodic maintenance
functions for the unit can be
undertaken by the end user. This
includes replacing (disposable) or
cleaning (permanent) air filters,
cleaning unit cabinet, cleaning the
condenser coil, and carrying out a
general unit inspection on a regular
basis.
WARNING! Disconnect the power
supply before removing access
panels to service the unit. Failure to
disconnect power before attempting
any servicing can result in severe
injury or death.
Air filters
It is very important for the central
duct system air filters to be kept
clean.
These should be inspected at least
once a month when the system is in
constant operation (in new
buildings, the filters should be
checked every week for the first four
weeks). If disposable-type filters are
used, they should only be replaced
with ones of the same type and size.

Table 41 - Refrigerant charge
Unit model and size

Number of circuits

Refrigerant charge
(kg) (R22/R407C)

YSD/YSH 060

3.5

YSD/YSH 072

3.7

YSD/YSH 090

4.5

YSD/YSH 102

3.7/2.1

YSD/YSH 120

3.5/3.0

Note: Refrigerant charges are given for information only. Check unit nameplate for exact values.

RT-SVX19A-E4

Maintenance
Note: Do not attempt to clean
disposable filters. Permanent filters
can be cleaned by washing with a
mild detergent and water. Ensure
that the filters are thoroughly dry
before reinstalling them in the unit
(or duct system).
Note: Replace permanent filters
annually if washing fails to clean
them, or they show signs of
deterioration. Be sure to use the
same type and size as were
originally installed.
Condenser coil
Unfiltered air circulates through the
unit's condenser coil and can cause
the coil's surface to become
clogged with dust, dirt, etc. To clean
the coil, brush the coil surface in the
direction of the fins with a soft
bristled brush.
Keep all vegetation away from the
condenser coil area.
Hot water coil (option)
Stop the unit. Do not disconnect the
main supply to the unit. This will
permit the anti-frost protection to
continue to operate, and avoid
water to freeze-up in the coil.

RT-SVX19A-E4

Service technician
maintenance
Before the cooling season, your
service technician may examine the
following areas of your unit:
• Filters, for cleaning or
replacement
• Motors and drives system
components
• Economizer gaskets, for
replacement if necessary
• Condenser coils, for cleaning
• Safety controls, for mechanical
cleaning
• Electrical components and
wiring, for replacement and
tightening of connections as
necessary
• Condensate drain, for cleaning
• Unit duct connections, to ensure
they are physically sound and
sealed to the unit casing
• Unit mounting support, to
ensure that it is sound
• The unit, to ensure there is no
obvious deterioration
Before the heating season, your
service technician may examine the
following areas of your unit:
• The unit, to ensure that the
condenser coil can receive the
required airflow (that the
condenser fan grille is not
obstructed)
• The control panel wiring, to
verify that all electrical
connections are tight, and that
wire insulation is intact
• Clean burner area, verify the gas
heat system operates properly.

Maintenance
Troubleshooting
The RTRM has the ability to provide
the service personnel with some
unit diagnostics and system status
information. Before turning the
main power disconnect switch "Off",
follow the steps below to check the
ReliaTel™
Refrigeration Module (RTRM). All
diagnostics & system status
information stored in the RTRM will
be lost when the main power is
turned "Off".
1. Verify that the Liteport LED on
the RTRM is burning
continuously. If the LED is lit, go
to Step 3.
2. If the LED is not lit, verify that
24 VAC is present between J1-1
and J1-2. If 24 VAC is present,
proceed to Step 3. If 24 VAC is
not present, check the unit main
power supply, check transformer
(TNS1). Proceed to Step 3 if
necessary.
3. Utilizing "Method 1" or
"Method 2" in the system status
diagnostic section, check the
following: System status,
Heating status, Cooling status. If
a System failure is indicated,
proceed to Step 4. If no failures
are indicated, proceed to Step 5.
4. If a System failure is indicated,
recheck Steps 1 and 2. If the LED
is not lit in Step 1, and 24 VAC is
present in Step 2, the RTRM has
failed. Replace the RTRM.

5. If no failures are indicated, use
one of the TEST mode
procedures described in the unit
"Start-Up" section to start the
unit. This procedure will allow
you to check all of the RTRM
outputs, and all of the external
controls (relays, contactors, etc.)
that the RTRM outputs energize,
for each respective mode.
Proceed to Step 6.
6. Step the system through all of
the available modes, and verify
operation of all outputs, controls,
and modes. If a problem in
operation is noted in any mode,
you may leave the system in that
mode for up to one hour while
troubleshooting. Refer to the
sequence of operations for each
mode, to assist in verifying
proper operation. Make the
necessary repairs and proceed to
Steps 7 and 8.
7. If no abnormal operating
conditions appear in the test
mode, exit the test mode by
turning the power "Off" at the
main power disconnect switch.
8. Refer to the individual
component test procedures if
other microelectronic
components are suspect.

System Status Checkout Procedure
"System Status" is checked by using
one of the following two methods:

Method 1
If the Zone Sensor Module (ZSM) is
equipped with a remote panel with
LED status indication, you can check
the unit within the space. If the ZSM
does not have LED's, use Method 2.
THS/P03 have the remote panel
indication feature. The LED
descriptions are listed below:
LED 1 (System) "On" during
normal operation. "Off" if a system
failure occurs or the LED fails.
"Flashing" indicates test mode.
LED 2 (Heat) "On" when the heat
cycle is operating. "Off" when the
heat cycle terminates or the LED
fails. "Flashing" indicates a heating
failure.
LED 3 (Cool) "On" when the
cooling cycle is operating. "Off"
when the cooling cycle terminates
or the LED fails. "Flashing" indicates
a cooling failure.
LED 4 (Service) "On" indicates a
clogged filter. "Off" during normal
operation. "Flashing" indicates an
supply fan failure.

RT-SVX19A-E4

Maintenance
Below is the complete listing of
failure indication causes:
System failure
Check the voltage between
terminals 6 and 9 on J6, it should
read approximately 32 VDC. If no
voltage is present, a system failure
has occurred. Refer to Step 4 in the
previous section for the
recommended troubleshooting
procedure.
Heating Failure
Verify Heat Failure by Ignition
Module (IGN) LED indicator:
OFF: No Power or Failure
ON: Normal
Slow Flash: Normal, Heat Call
Fast Flash: Error Code:
1 Flash: Communication Failure
2 Flashes: System Lockout
3 Flashes: Pressure Switch Fail
4 Flashes TC01 or TC02 Open
5 Flashes: Flame w/o Gas Valve
6 Flashes: Flame Rollout Open

Cooling Failure
1. Cooling and heating set point
(slide pot) on the zone sensor
has failed. Refer to the "Zone
Sensor Test Procedure" section.
2. Zone temperature thermistor
ZTEMP on ZTS failed. Refer to
the "Zone Sensor Test Procedure"
section.
3. CC1 or CC2 24 VAC control circuit
has opened, check CC1 & CC2
coils, and any of the controls
below that apply to the unit
(HPC1, HPC2).
4. LPC1 has opened during the
3 minute minimum "on time"
during 4 consecutive compressor
starts, check LPC1 or LPC2 by
testing voltage between the J1-8
& J3-2 terminals on the RTRM
and ground. If 24 VAC is present,
the LPC's has not tripped. If no
voltage is present, LPC's has
tripped.
Service Failure
1. If the supply fan proving switch
has closed, the unit will not
operate (when connected to
RTOM), check the fan motor,
belts, and proving switch.
2. Clogged filter switch has closed,
check the filters.

Simultaneous Heat and Cool Failure
1. Emergency Stop is activated

Method 2
The second method for determining
system status is done by checking
voltage readings at the RTRM (J6).
The system indication descriptions
and the approximate voltages are
listed below.
System Failure
Measure the voltage between
terminals J6-9 & J6-6.
Normal Operation = approximately
32 VDC
System Failure = less than 1 VDC,
approximately 0.75 VDC
Test Mode = voltage alternates
between 32 VDC & 0.75 VDC
Heat Failure
Measure the voltage between
terminals J6-7 & J6-6.
Heat Operating = approximately
32 VDC
Heat Off = less than 1 VDC,
approximately 0.75 VDC
Heating Failure = voltage alternates
between 32 VDC & 0.75 VDC
Cool Failure
Measure the voltage between
terminals J6-8 & J6-6.
Cool Operating = approximately
32 VDC
Cool Off = less than 1 VDC,
approximately 0.75 VDC
Cooling Failure = voltage alternates
between 32 VDC & 0.75 VDC

RT-SVX19A-E4

Maintenance
Service Failure
Measure the voltage between
terminals J6-10 & J6-6.
Clogged Filter = Approximately
32 VDC.
Normal = Less than 1 VDC,
approximately 0.75 VDC
Fan Failure = voltage alternates
between 32 VDC & 0.75 VDC.
To use LED's for quick status
information at the unit, purchase a
ZSM and connect wires with
alligator clamps to terminals 6
through 10.
Connect each respective terminal
wire (6 through 10) from the Zone
Sensor to the unit J6 terminals 6
through 10.
Note: If the system is equipped
with a programmable zone sensor
THS03, the LED indicators will not
function while the ZSM is
connected.

Resetting Cooling and Ignition
Lockouts

Zone Temperature Sensor (ZTS)
Service Indicator

Cooling Failures and Ignition

The ZSM SERVICE LED is a generic
indicator that will signal the closing
of a Normally Open switch at any
time, providing the Indoor Motor
(IDM) is operating. This indicator is
usually used to indicate a clogged
filter, or an air side fan failure.

Lockouts are reset in an identical
manner. Method 1 explains
resetting the system from the space,
Method 2 explains resetting the
system at the unit.
Note: Before resetting Cooling
Failures and Ignition Lockouts,
check the Failure Status Diagnostics
by the methods previously
explained.
Diagnostics will be lost when the
power to the unit is disconnected.
Method 1
To reset the system from the zone,
turn the "Mode" selection switch at
the zone sensor to the "Off"
position.
After approximately 30 seconds,
turn the "Mode" selection switch to
the desired mode, i.e. Heat, Cool or
Auto.
Method 2
To reset the system at the unit,
cycle the unit power by turning the
disconnect switch "Off" and then
"On".
Lockouts can be cleared through the
building management system. Refer
to the building management system
instructions for more information.

The RTRM will ignore the closing of
this Normally Open switch for 2 (±1)
minutes. This helps prevent
nuisance SERVICE LED indications.
The exception is the LED will flash
40 seconds after the fan is turned
"On" if the Fan Proving Switch is not
made.
Clogged Filter Switch
This LED will remain lit the entire
time that the Normally Open switch
is closed. The LED will be turned off
immediately after resetting the
switch (to the Normally Open
position), or any time that the IDM
is turned "Off".
If the switch remains closed, and
the IDM is turned "On", the SERVICE
LED will be turned "On" again after
the 2 (±1) minute ignore delay.
This LED being turned "On", will
have no other affect on unit
operation. It is an indicator only.
Fan Failure Switch
When the "Fan Failure" switch is
wired to the RTOM, the LED will
remain flashing the entire time the
fan proving switch is closed,
indicating a fan failure, and it will
shut the unit operations down.

RT-SVX19A-E4

Maintenance
Zone Temperature Sensor (ZTS) Test
Note:These procedures are not for
programmable or digital models
and are conducted with the Zone
Sensor
Module electrically removed from
the system.
Test 1
Zone Temperature Thermistor
(ZTEMP)
This component is tested by
measuring the resistance between
terminals 1 and 2 on the Zone
Temperature Sensor.

RT-SVX19A-E4

Table 42 - Thermistor Resistance /
Temperature Chart

Temperature/resistance coefficient is
negative.
Temperature

Resistance

(°C)

(kOhms)

-21

103

-15

74.65

-9

54.66

-7

46.94

-4

40.4

-1

34.85

30.18

26.22

22.85

19.96

17.47

15.33

13.49

11.89

10.5

9.297

8.247

7.33

6.528

5.824

Literature order number

A business of American Standard
Companies www.trane.com
For more information, contact your local Trane
sales office or e-mail us at comfort@trane.com

RT-SVX19A-E4

Date

0805

Supersedes

RT-SVX04A and RT-SVX05A

Literature stocking location

Europe

Trane has a policy of continuous product and product data improvement and reserves the right to
change design and specifications without notice. Only qualified technicians should perform the
installation and servicing of equipment referred to in this publication.
American Standard Europe BVBA
Registered Office: 1789 Chaussée de Wavre, 1160 Brussels - Belgium

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Trane Rt Svx19A E4 Users Manual

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