Carrier 30Xw325 400 Users Manual 30xw 2pd

30XW325-400 to the manual 38fc26d4-9fc5-4c35-9869-c8e260169f0f

2015-01-24

: Carrier Carrier-30Xw325-400-Users-Manual-311102 carrier-30xw325-400-users-manual-311102 carrier pdf

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AQUAFORCE®
30XW325-400
Water-Cooled Liquid Screw
Chillers

Product
Data

325 to 400 Nominal Tons
(1133 to 1354 kW)
®

a30-4659.eps

Carrier's AquaForce 30XW chillers
provide a great combination of performance and compact footprint for
cooling and heat recovery applications. These chillers provide excellent
reliability and efficiency at true operating conditions without compromising
the environment.
• Chlorine-free R-134a HFC
refrigerant
• Positive displacement, twin screw
compressors
• AHRI (Air Conditioning, Heating,
and Refrigeration Institute) certified
efficiencies to 0.468 kW per ton
IPLV (integrated part load value)
• Dual independent refrigerant
circuits
• Compact footprint, less than 48 in.
(1219 mm) wide
• Easy to use controls

Features/Benefits
Quality design and
construction make the
AquaForce 30XW chillers an
excellent choice for modern,
efficient chilled water plants.
Small footprint
The 30XW chillers feature a compact
footprint and are delivered as a single
complete package less than 48 in.
(1219 mm) wide for easy installation
and minimal indoor space. The 30XW
chiller footprints may be up to 30%
smaller when compared to other chillers and may require less mechanical
room floor space and smaller concrete
pads.

Form 30XW-2PD

Features/Benefits (cont)
Easy installation
The AquaForce® 30XW screw chillers
are shipped with starter and unit
mounted flow switch installed and can
be shipped with a full R-134a refrigerant charge to minimize installation
time. The unit provides single point
power connection (using optional control power transformer) and quick, easy
piping connections (using Victaulictype clamp on couplings). The 30XW
200-v, 230-v, 460-v, and 575-v units
are designed in accordance with UL
(Underwriters Laboratory) and UL
Canada (Underwriters Laboratory,
Canada) standards to minimize electrical inspection time.

Dual circuits
Dual independent refrigerant circuits
provide reliable, dependable cooling,
excellent part load operation, and
redundancy. Each circuit includes its
own compressor, electronic expansion
valve, filter drier, and sight glass to
assure operation.

High efficiency
The Aquaforce 30XW screw chiller
efficiency levels meet or exceed energy
efficiency requirements of ASHRAE
(American Society of Heating, Ventilation and Air Conditioning Engineers)
90.1 2007 and CSA (Canadian Standards Association) for both full load and
part load operation and is certified to
AHRI standards.
Per AHRI 550/590, chillers operate at
design conditions less than one percent
of the time. As a result, superior part
load efficiency is required for today's
chilled water applications. The 30XW
chillers deliver integrated part-load

Table of contents

values (IPLV) as low as 0.468 kW per
ton at AHRI conditions while offering
the ability to operate in a broad range
of applications and climates. This
exceptional performance has a significant impact on energy savings and cost
of ownership.

Heat recovery
The Aquaforce 30XW screw chiller
provides up to 140 F (60 C) leaving
condenser water (requires 300 psig
[2068 kPa] condenser option) when
applied in heat recovery applications.
Further, the 30XW unit heat control
mode can be utilized to maintain a constant leaving condenser water temperature. Low source controls provide
evaporator suction protection to prevent nuisance trips when operating in
heat recovery applications. This flexible capability allows a chiller to meet
both cooling and heating requirements
providing a high level of interchangeability within a chilled water plant.

Environmental leadership
Carrier has long been committed to the
environment and its sustainability. The
Aquaforce 30XW screw chiller provides customers with a high-efficiency,
chlorine free, long-term solution unaffected by refrigerant phase outs.
Carrier's decision to utilize non-ozone
depleting R-134a refrigerant provides
customers with a safe and environmentally sound choice without compromising efficiency. In addition, R-134a
refrigerant was given an A1 safety rating by ASHRAE, meaning that it is
among the safest refrigerants available.

Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-18
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19,20
Typical Control Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-24
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-28
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-32

Positive displacement screw
compression
Positive displacement compression
ensures stable operation under all load
conditions without the possibility of
compressor surge. High-efficiency
rotary twin screw compressors with
infinitely variable slide valves allow the
chillers to exactly match actual load
conditions, delivering excellent part
load performance.

Factory testing
A quick start-up is assured once installation is complete, since each 30XW
unit is manufactured at an ISO (International Organization for Standardization) 9001:2000 listed manufacturing
facility to ensure quality. In addition, all
30XW units that are shipped with a full
charge of R-134a refrigerant are tested
under load at the factory to provide
reliable start-up.

Low starting current (inrush)
Dual circuit units stage the start up of
the compressors thereby reducing the
over all current draw by up to 40%.

Constant or variable evaporator flow
Aquaforce 30XW screw chillers are
suitable for constant or variable evaporator flow.

Hermetic motor
The Aquaforce 30XW chiller utilizes
motors that are hermetically sealed
from the machine room. Refrigerant is
used to cool the motor windings.
Carrier's hermetic design eliminates:
• Compressor shaft seals that require
maintenance and increase the likelihood of refrigerant leaks.
• Machine room cooling requirements
associated with air-cooled motors,
which dissipate heat to the mechanical room.
• High noise levels common with aircooled motors, which radiate noise
to the machine room and adjacent
areas.
• Shaft alignment problems that occur
with open-drive designs during startup and operation, when equipment
temperature variations cause thermal expansion.

Positive pressure design
Positive pressure designs eliminate the
need for costly low pressure containment devices, reducing the initial cost

of the system. The AquaForce® 30XW
chiller's positive pressure design
ensures that air, moisture and other
performance degrading contaminants
are not sucked inside the chiller. Purge
units and their associated maintenance
are no longer necessary.

Refrigerant isolation valves
The refrigerant isolation valves enable
service personnel to store the refrigerant charge in the evaporator or condenser during servicing. These valves
also allow the refrigerant to be stored
inside the chiller during shipment from
the factory minimizing start-up time.
During servicing, the in-chiller storage
reduces refrigerant loss and eliminates
time-consuming transfer procedures.
As a self-contained unit, the AquaForce
30XW chiller does not require additional remote storage systems.

Optional suction service valves
The optional suction service valves
allow for further isolation of the compressor from the evaporator vessel.

Marine container shipment
The compact design allows for container shipment to export destinations,
ensuring quality while reducing shipping cost.

Heat exchangers
The Aquaforce 30XW chillers utilize
mechanically cleanable shell and tube
evaporators and condensers available
with a complete line of waterbox
options to meet project specific
requirements. One, two, and three
pass arrangements are available to
meet a wide variety of flow conditions.
Nozzle in head and marine waterboxes
are available to meet 150 psig
(1034 kPa) and 300 psig (2068 kPa)
piping requirements.
Heat exchanger features include:
ASME certified construction
An independent agency certifies the
design, manufacture, and testing of all
heat exchangers to American Society
of Mechanical Engineers (ASME) standards, ensuring heat exchanger safety,
reliability and long life. The ASME
U-stamp is applied to the refrigerant
side of the evaporator and condenser
and is applied to the water side of these
heat exchangers when 300 psig
(2068 kPa) marine waterboxes are
provided.

Electronic thermal-dispersion flow
switch
An electronic thermal-dispersion flow
switch switch is included with the evaporator. The switch is factory installed
and tested and contains no moving
parts for high reliability.
High performance tubing
Carrier's AquaForce chillers utilize
advances in heat transfer technology
providing compact, high-efficiency
heat exchangers. Tubing with
advanced internally and externally
enhanced geometry improves chiller
performance by reducing overall resistance to heat transfer while reducing
fouling.
Evaporator tube expansion
Evaporator tube expansion at center
support sheets prevents unwanted tube
movement and vibration, thereby
reducing the possibility of premature
tube failure. Tube wall thickness is
greater at the expansion location, support sheets, and end tube sheets, to
provide maximum strength and long
tube life.
Closely spaced intermediate support sheets
Support sheets prevent tube sagging
and vibration, thereby increasing heat
exchanger life.
Refrigerant filter isolation valves
These valves allow filter replacement
without pumping down the chiller,
reducing service time and expense.

Microprocessor controls
The AquaForce 30XW screw chiller
controls communicate in easy to understand English, making it as easy as possible to monitor and control each
chiller while maintaining fluid temperatures. Controls are available with
French, Portuguese and Spanish as
standard configuration options. These
controls result in higher chiller reliability, simplified training and correspondingly lower operational and
maintenance costs.
Two user interface options are available, the Touch Pilot™ display and the
Navigator™ module.
The Touch Pilot display is an easy to
use touch screen display that provides
simple navigation for configuration and
control of the 30XW units.

Carrier's exclusive handheld Navigator display provides convenience and
powerful information in the palm of
your hand. The Navigator display helps
technicians to quickly diagnose problems and even prevent them from
occurring.
All 30XW units are ready to be used
with Carrier Comfort Network® (CCN)
devices.
Controls features include:
Automatic capacity override
This function unloads the compressor
whenever key safety limits are
approached, increasing unit life.
Chilled liquid reset
Reset can be accomplished manually or
automatically from the building management system. For a given capacity,
reset allows operation at slower compressor speeds, saving energy when
warmer chilled liquid can be used.
Demand limiting
This feature limits the power draw of
the chiller during peak loading conditions. When incorporated into the
CCN building automation system, a red
line command holds chillers at their
present capacity and prevents any
other chillers from starting. If a load
shed signal is received, the compressors are unloaded to avoid demand
charges whenever possible.
Ramp loading
Ramp loading ensures smooth pulldown of liquid loop temperature and
prevents a rapid increase in compressor power consumption during the
pulldown period.
Automated controls test
The test can be executed prior to startup to verify that the entire control system is functioning properly.
365-day real time clock
This feature allows the operator to program a yearly schedule for each week,
weekends, and holidays.
Occupancy schedules
Schedules can be programmed into the
controller to ensure that the chiller
operates when cooling is required and
remains off when not needed by the
tenants or process.

Features/Benefits (cont)
Extensive service menu
Unauthorized access to the service
menu can be password-protected.
Built-in diagnostic capabilities assist in
troubleshooting and recommend
proper corrective action for pre-set
alarms, resulting in greater up time.

Alarm file
This file maintains the last 50 time and
date-stamped alarm and alert messages
in memory. This function reduces troubleshooting time and cost.

Configuration data backup
Non-volatile memory provides protection during power failures and
eliminates time consuming control
reconfiguration.

a30-4456
30-562

TOUCH PILOT™ DISPLAY

SMOOTH ROTARY COMPRESSOR
TWIN-SCREW DESIGN
Com

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MOD

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Alarm

Run

Status
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Status

Serv
Tem

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Pres
Setp
Inpu
Outp

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Conf
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Time
Cloc
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Mod
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ESC

Alarm

ENT

a30-3924

OPTIONAL NAVIGATOR™ DISPLAY

Model number nomenclature
30XW

–

325

–

30XW – AquaForce® Water-Cooled
Screw Chiller

Unit Size (Nominal Tons) (kW)
325 – 325 (1133)
350 – 350 (1206)
400 – 400 (1354)

Voltage
1 – 575-3-60
2 – 380-3-60
4 – 230-3-60
6 – 460-3-60
7 – 200-3-60

Condenser Options
- – 2 Pass, NIH, 150 psig (1034 kPa), Victaulic, Discharge Connections (Std)
0 – 2 Pass, NIH, 150 psig (1034 kPa), Victaulic, Suction Connections
1 – 2 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Connections
2 – 2 Pass, NIH, 150 psig (1034 kPa), Flange, Suction Connections
3 – 2 Pass, NIH, 300 psig (2068 kPa), Victaulic, Discharge Connections
4 – 2 Pass, NIH, 300 psig (2068 kPa), Victaulic, Suction Connections
5 – 2 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Connections
6 – 2 Pass, NIH, 300 psig (2068 kPa), Flange, Suction Connections
7 – 2 Pass, MWB, 150 psig (1034 kPa), Victaulic, Discharge Connections
8 – 2 Pass, MWB, 150 psig (1034 kPa), Victaulic, Suction Connections
9 – 2 Pass, MWB, 300 psig (2068 kPa), Victaulic, Discharge Connections
B – 2 Pass, MWB, 300 psig (2068 kPa), Victaulic, Suction Connections
C – 2 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Connections
D – 2 Pass, MWB, 150 psig (1034 kPa), Flange, Suction Connections
F – 2 Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Connections
G – 2 Pass, MWB, 300 psig (2068 kPa), Flange, Suction Connections
H – 1 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Leaving
J – 1 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Leaving
K – 1 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Leaving
L – 1 Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Leaving

Heat Machine
- – Std Condenser/Comfort Cooling (Std)
M – Heat Machine Condenser/Comfort Cooling

Evaporator Options
- – 2 Pass, NIH, 150 psig (1034 kPa), Victaulic, Discharge Connections (Std)
0 – 2 Pass, NIH, 150 psig (1034 kPa), Victaulic, Suction Connections
1 – 2 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Connections
2 – 2 Pass, NIH, 150 psig (1034 kPa), Flange, Suction Connections
3 – 2 Pass, NIH, 300 psig (2068 kPa), Victaulic, Discharge Connections
4 – 2 Pass, NIH, 300 psig (2068 kPa), Victaulic, Suction Connections
5 – 2 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Connections
6 – 2 Pass, NIH, 300 psig (2068 kPa), Flange, Suction Connections
7 – 2 Pass, MWB, 150 psig (1034 kPa), Victaulic, Discharge Connections
8 – 2 Pass, MWB, 150 psig (1034 kPa), Victaulic, Suction Connections
9 – 2 Pass, MWB, 300 psig (2068 kPa), Victaulic, Discharge Connections
B – 2 Pass, MWB, 300 psig (2068 kPa), Victaulic, Suction Connections
C – 2 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Connections
D – 2 Pass, MWB, 150 psig (1034 kPa), Flange, Suction Connections
F – 2 Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Connections
G – 2 Pass, MWB, 300 psig (2068 kPa), Flange, Suction Connections
H – 1 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Leaving
J – 1 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Leaving
K – 1 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Leaving
L – 1 Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Leaving
M – 3 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Leaving
N – 3 Pass, NIH, 150 psig (1034 kPa), Flange, Suction Leaving
P – 3 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Leaving
Q – 3 Pass, NIH, 300 psig (2068 kPa), Flange, Suction Leaving
R – 3 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Leaving
S – 3 Pass, MWB, 150 psig (1034 kPa), Flange, Suction Leaving
T – 3 Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Leaving
V – 3 Pass, MWB, 300 psig (2068 kPa), Flange, Suction Leaving

—
—
—
—

LEGEND
Control Power Transformer
Energy Management Module
Ground Fault Circuit Interrupter
Local Operating Network

*Evaporator insulation is standard.

–

B
Packaging/Charging Options
B – R-134a Refrigerant with Bag (Std)
C – R-134a Refrigerant with Crate Over Bag
D – Nitrogen Refrigerant with Bag
F – Nitrogen Refrigerant with Crate Over Bag

Design Series

CPT
EMM
GFCI
LON

–

MWB — Marine Waterbox
NIH
— Nozzle-In-Head
XL
— Across-the-Line Start

Controls/Communications Options
- – Navigator™ Display
0 – Navigator Display, EMM
1 – Navigator Display, GFCI Service Option
2 – Navigator Display, EMM, GFCI Service Option
3 – Touch Pilot™ Display (Std)
4 – Touch Pilot, EMM
5 – Touch Pilot, GFCI Service Option
6 – Touch Pilot, EMM, GFCI Service Option
7 – Navigator Display, BACnet™ Translator
8 – Navigator Display, EMM, BACnet Translator
9 – Navigator Display, GFCI Service Option,
BACnet Translator
B – Navigator Display, EMM, GFCI Service Option,
BACnet Translator
C – Touch Pilot Display (Std), BACnet Translator
D – Touch Pilot Display, EMM, BACnet Translator
F – Touch Pilot Display, GFCI Service Option,
BACnet Translator
G – Touch Pilot Display, EMM, GFCI Service Option,
BACnet Translator
H – Navigator Display, LON Translator
J – Navigator Display, EMM, LON Translator
K – Navigator Display, GFCI Service Option,
LON Translator
L – Navigator Display, EMM, GFCI Service Option,
LON Translator
M – Touch Pilot Display (Std), LON Translator
N – Touch Pilot Display, EMM, LON Translator
P – Touch Pilot Display, GFCI Service Option,
LON Translator
Q – Touch Pilot Display, EMM, GFCI Service
Option, LON Translator

Electrical Options
- – Single Point, XL Starter, Terminal Block
(Std 380, 460, 575-v)
0 – Single Point, Wye-Delta Starter, Terminal
Block (Std 200,230-v)
3 – Dual Point, XL Starter, Terminal Block
4 – Dual Point, Wye-Delta Starter, Terminal Block
7 – Single Point, XL Starter, Non-Fused Disconnect
8 – Single Point, Wye-Delta, Non-Fused Disconnect
C – Dual Point, XL Starter, Non-Fused Disconnect
D – Dual Point, Wye-Delta Starter, Non-Fused
Disconnect
H – Single Point, XL Starter, Terminal Block, CPT
J – Single Point, Wye-Delta Starter, Terminal
Block, CPT
M – Dual Point, XL Starter, Terminal Block, CPT
N – Dual Point, Wye-Delta Starter, Terminal
Block, CPT
R – Single Point, XL Starter, Non-Fused
Disconnect, CPT
S – Single Point, Wye-Delta, Non-Fused
Disconnect, CPT
W – Dual Point, XL Starter, Non-Fused
Disconnect, CPT
X – Dual Point, Wye-Delta Starter, Non-Fused
Disconnect, CPT
Refrigeration Circuit Options*
4 – Standard Unit
6 – With Suction Service Valves
D – With Minimum Load Control
G – With Suction Service Valves and Minimum
Load Control
N – With Condenser Insulation for Heat Machine
Q – With Suction Service Valves and Condenser
Insulation for Heat Machine
X – With Minimum Load Control and Condenser
Insulation for Heat Machine
Z – With Suction Service Valves, Minimum Load
Control and Condenser Insulation for
Heat Machine

a30-4744

Quality Assurance
Certified to ISO 9001:2000
5

Capacity ratings
30XW
UNIT SIZE
325
350
400

CAPACITY
Tons
322
343
385

Output
(kW)
1132.5
1206.3
1354.0

INPUT
POWER
(kW)
204.8
215.7
242.8

EVAPORATOR
FLOW
gpm

L/s

773
824
924

48.8
52.0
58.3

EVAPORATOR
PRESSURE DROP
Ft of
kPa
Water
15.6
46.5
17.5
52.2
21.5
64.1

LEGEND
AHRI — Air Conditioning, Heating and Refrigeration Institute
IPLV — Integrated Part Load Value
NOTES:
1. Certified in accordance with AHRI Standard 550/590 at standard
rating conditions.
2. Standard rating conditions are as follows:
Evaporator Conditions:
Leaving Water Temperature: 44 F (6.7 C)
Flow:
2.4 gpm per ton (0.043 L/s per kW)
Condenser Conditions:
Entering Water Temperature:85 F (29.4 C)
Flow:
3.0 gpm per ton (0.054 L/s per kW)

CONDENSER
FLOW
gpm

L/s

967
1029
1155

61.0
64.9
72.9

CONDENSER
PRESSURE DROP FULL LOAD
IPLV
EFFICIENCY
Ft of
(kW/Ton) (kW/Ton)
kPa
Water
10.9
32.5
0.636
0.468
12.3
36.7
0.629
0.471
15.2
45.3
0.631
0.474

Fouling Factor (Evaporator):
0.00010 hr x sq ft x F per Btuh (0.000018 m2 x K per W)
Fouling Factor (Condenser):
0.00025 hr x sq ft x F per Btuh (0.000044 m2 x K per W)
3. IPLV is a single number part-load efficiency value calculated from
the system full-load efficiency values and corrected for a typical
building air-conditioning application.
4. Contact Carrier for custom ratings.
5. Data shown for standard chiller with 2 pass, nozzle-in-head (NIH)
waterboxes.

Physical data
30XW325-400 UNIT PHYSICAL DATA — ENGLISH
30XW UNIT SIZE
NOMINAL CAPACITY (tons)
UNIT WEIGHT (lb) (Operating/Shipping)
COMPRESSORS
Compressor Speed (rpm)
Compressor Model Number (qty)
Unloading Type
Minimum Step Capacity % (standard)
Optional %
Economizer
Temperature Relief Valve Connection (in. SAE Flare) (each circuit)
REFRIGERANT
Charge (lb) Circuit A
Charge (lb) Circuit B
OIL
Charge (gal.) Circuit A
Charge (gal.) Circuit B
EVAPORATOR
Net Fluid Volume (gal.)
Maximum Refrigerant Pressure (psig)
Maximum Water Side Pressure (psig)
Standard
Optional
Water Connections
Inlet and Outlet (in.)
1-Pass NIH or MWB Flange (optional)
1-Pass NIH Victaulic (optional)
2-Pass NIH or MWB Flange (optional)
2-Pass NIH Victaulic (standard)
2-Pass MWB Victaulic (optional)
3-Pass NIH or MWB Flange (optional)
3-Pass NIH Victaulic (optional)
Drain (in. NPT)
Relief Valve Connection (in. NPTF)
Quantity Per Circuit
Relief Valve Setting (psig)
Flow Rate (lb air/min)
CONDENSER
Net Fluid Volume (gal.)
Maximum Refrigerant Pressure (psig)
Standard Condenser
Heat Machine
Maximum Water Side Pressure (psig)
Standard
Optional
Heat Machine
Water Connections
Inlet and Outlet (in.)
1-Pass NIH or MWB Flange (optional)
1-Pass NIH Victaulic (optional)
2-Pass NIH or MWB Flange (optional)
2-Pass NIH Victaulic (standard)
2-Pass MWB Victaulic (optional)
Drain (in. NPT)
Relief Valve Connection (in. NPTF) (Standard/Heat Machine)
Quantity Per Circuit
Relief Valve Setting (psig)
Flow Rate (lb air/min)
Temperature Relief Valve Connection (in. SAE Flare)
Discharge Line (Qty per Circuit)
Liquid Line (Qty per Circuit)
CHASSIS DIMENSIONS (ft-in.)
Length
Width
Height
HFC —
MWB —
NIH —
NPTF —
POE —
SAE —

325
325
14,319/13,163

No
—
260
260

350
350
14,515/13,369
Semi-hermetic, twin screw
3500
06TU483 (2)
Slide Valve
15%
10%
Yes
3/8
HFC, R-134a
270
270
POE, SW-220
4
4

400
400
14,759/13,489
06TU554 (2)

76.0
220
150
300
6
8
6
8
6
6
8
3/
8
3 /4
1
220
31.7
82.6
220
300
150
300
300
6
8
6
8
6
3/
8
3 /4 / 3 /4
2/2
220/300
31.7/46.6
1/
4
1
1
13 - 3 3/4
3 - 11 3/8
6 - 6 11/16

LEGEND
Hydrofluorocarbon
Marine Waterbox
Nozzle-In-Head
National Pipe Thread Female
Polyolester
Society of Automotive Engineers

Physical data (cont)
30XW325-400 UNIT PHYSICAL DATA — SI
30XW UNIT SIZE
NOMINAL CAPACITY (kW)
UNIT WEIGHT (kg) (Operating/Shipping)
COMPRESSORS
Compressor Speed (r/s)
Compressor Model Number (qty)
Unloading Type
Minimum Step Capacity % (standard)
Optional %
Economizer
Temperature Relief Valve Connection (in. SAE Flare) (each circuit)
REFRIGERANT
Charge (kg) Circuit A
Charge (kg) Circuit B
OIL
Charge (L) Circuit A
Charge (L) Circuit B
EVAPORATOR
Net Fluid Volume (L)
Maximum Refrigerant Pressure (kPa)
Maximum Water Side Pressure (kPa)
Standard
Optional
Water Connections
Inlet and Outlet (in.)
1-Pass NIH or MWB Flange (optional)
1-Pass NIH Victaulic (optional)
2-Pass NIH or MWB Flange (optional)
2-Pass NIH Victaulic (standard)
2-Pass MWB Victaulic (optional)
3-Pass NIH or MWB Flange (optional)
3-Pass NIH Victaulic (optional)
Drain (in. NPT)
Relief Valve Connection (in. NPTF)
Quantity Per Circuit
Relief Valve Setting (kpa)
Flow Rate (kg air/min)
CONDENSER
Net Fluid Volume (L)
Maximum Refrigerant Pressure (kPa)
Standard Condenser
Heat Machine
Maximum Water Side Pressure (kPa)
Standard
Optional
Heat Machine
Water Connections
Inlet and Outlet (in.)
1-Pass NIH or MWB Flange (optional)
1-Pass NIH Victaulic (optional)
2-Pass NIH or MWB Flange (optional)
2-Pass NIH Victaulic (standard)
2-Pass MWB Victaulic (optional)
Drain (in. NPT)
Relief Valve Connection (in. NPTF) (Standard/Heat Machine)
Quantity Per Circuit
Relief Valve Setting (kpa)
Flow Rate (kg air/min)
Temperature Relief Valve Connection (in. SAE Flare)
Discharge Line (Qty per Circuit)
Liquid Line (Qty per Circuit)
CHASSIS DIMENSIONS (mm)
Length
Width
Height
HFC —
MWB —
NIH —
NPTF —
POE —
SAE —

LEGEND
Hydrofluorocarbon
Marine Waterbox
Nozzle-In-Head
National Pipe Thread Female
Polyolester
Society of Automotive Engineers

325
1133
6495/5971

No
—
117.9
117.9

350
1206
6584/6064
Semi-hermetic, twin screw
58.3
06TU483 (2)
Slide Valve
15%
10%
Yes
3 /8
HFC, R-134a
122.5
122.5
POE, SW-220
15.1
15.1
287.7
1517
1034
2068
6
8
6
8
6
6
8
3/
8
3 /4
1
1517
14.38
312.7
1517
2068
1034
2068
2068
6
8
6
8
6
3/
8
3 /4 / 3 /4
2/2
1517/2068
14.38/21.1
1/
4
1
1
4057.7
1203.3
1998.7

400
1354
6695/6119
06TU554 (2)

Options and accessories
ITEM
Controls Options
Navigator Hand-Held Display
Remote Enhanced Display
BACnet Translator Control
LON Translator Control
Energy Management Module
Evaporator Options
One-Pass Evaporator Head
Three-Pass Evaporator Head
Marine Waterboxes
Flanged Connections
Suction Service Valve
300 psig (2068 kPa) Operating Pressure
Condenser Options
Heat Machine Condenser
One-Pass Condenser Head
Marine Waterboxes
Flanged Connections
300 psig (2068 kPa) Operating Pressure
Starter Options
Wye-Delta Starter
Dual Point Power
Non-Fused Disconnect
Control Transformer
115-v GFCI Convenience Outlet
Unit Options
Minimum Load Control
Temperature Reset Sensor
Nitrogen Charge
Crate for Shipment
Vibration Pads
Vibration Isolation Springs

FACTORYINSTALLED
OPTION

FIELDINSTALLED
ACCESSORY

X
X
X
X
X

X
X
X
X
X
X
X
X
X
X
X
X
X
X

The 300 psig (2068 kPa) evaporator operating
pressure option allows operation for water-side pressure
up to 300 psig (2068 kPa).
The 300 psig (2068 kPa) condenser operating
pressure option allows operation for water-side pressure
up to 300 psig (2068 kPa).
Minimum load control allows additional capacity reduction for unit operation below the minimum step of unloading via hot gas bypass.
Marine waterboxes provide water piping connections
extending from the side of the waterbox (as opposed to
extending from the end of the waterbox). This option also
includes a removable bolt on waterbox cover allowing
access to the heat exchanger tubes without breaking the
existing field piping. This option is available for both the
evaporator and condenser.

X
X
X
X
X
X
X
X
X

a30-4684.eps
X
X

Factory-installed options
Navigator™ module provides a portable, hand-held display for convenient access to unit status, operation, configuration and troubleshooting diagnostics capability. The
four-line, 20-character LCD (liquid crystal display) display
provides clear language information in English, French,
Spanish, or Portuguese. The Navigator module features an
industrial grade extension chord and magnets located on
the back of the weatherproof enclosure to allow attachment to sheet metal components for hands free operation.
BACnet™ translator control provides an interface
between the chiller and BACnet Local Area Network
(LAN, i.e., MS/TP EIA 485). The BACnet translator control is also available as a field-installed option.
LON translator control provides an interface between
the chiller and Local Operating Network (LON, i.e., LONWorks FT-10A ANSI/EIA-709.1). The LON translator
control is also available as a field-installed option.
Energy management module provides energy management capabilities to minimize chiller energy consumption.
Several features are provided with this module including
leaving fluid temperature reset, cooling set point reset or
demand limit control from a 4 to 20 mA signal, 2-point
demand limit control (from 0 to 100%) activated by a
remote contact closure, and discrete input for "Ice Done"
indication for ice stage system interface.

Flanged connection option provides an ANSI (American National Standards Institute) flange on the end of the
chiller water piping for connection to a customer supplied
mating flange in the field piping. This option is available
for both the evaporator and condenser.

a30-4685
One-pass evaporator provides a lower pressure drop
through the evaporator for applications with low delta T
(temperature) or high flow or where the evaporators are
piped in a series or side stream arrangement. One-pass
evaporator is only available with flanged connections and
with discharge end leaving water connection.
Three-pass evaporator provides a greater efficiency for
brine applications and in applications with a high delta T
and low flow. Three-pass evaporator is only available with
flanged connections.
Heat machine condenser allows operation with up to
140 F (60 C) leaving condenser water temperature (see
E-CAT for selections). In addition, this option provides
factory-installed thermal insulation on the condenser,
condenser flow switch and leaving condenser water
9

Options and accessories (cont)
temperature sensor to facilitate operating in HEAT mode.
Heat machine units require 300 psig (2068 kPa) option
and field-installed thermal insulation on the compressor
discharge piping and waterbox heads because of high
temperature.
One-pass condenser provides a lower pressure drop
through the condenser for applications with low delta T
(temperature) or high flow or where the condensers are
piped in a series. The one-pass condenser option is only
available with flanged connections and with a discharge
end leaving water connection.
Wye-delta start is an alternate starting method which
reduces the inrush current when starting the compressor.
Wye delta start is standard on 208-v, and 230-v units,
optional for 380-v, 460-v, and 575-v.
Dual point power provides a means for connecting two
sources of power to dual compressor 30XW chillers. One
source of power is wired to operate the compressor on the
A circuit and one source of power is wired to operate the
compressor on the B circuit of the chiller.
Non-fused disconnect provides a no load, lockable,
through the door handle disconnect for unit power on the
chiller. On dual point power, one disconnect is provided for
each of the two main power supplies. This disconnect does
not remove the control circuit from power supply.
Control transformer is sized to supply the needs of the
control circuit from the main power supply.
115-v GFCI convenience outlet includes 4 amp GFI
(ground fault interrupt) receptacle. Convenience outlet is
115-v female receptacle. Not available with 380-v units.
Nitrogen charge provides a 15 lb (6.8 kg) charge of
nitrogen instead of a full factory charge of R-134a refrigerant to keep the chiller refrigerant circuit dry during shipment. This option is recommended for applications where
the unit will be disassembled prior to installation. Units
shipped with a nitrogen charge will receive an electrical
continuity test at the factory prior to shipment.
Crate for shipment provides a wooden crate around the
chiller. The chiller is bagged prior to being placed in the
crate. This option is recommended for export orders.
Suction service valves allow for further isolation of the
compressor from the evaporator vessel.

Field-installed accessories
Remote enhanced display is a remotely mounted
indoor 40-character per line, 16-line display panel for unit
monitoring and diagnostics.

BACnet™ translator control provides an interface
between the chiller and BACnet Local Area Network
(LAN, i.e., MS/TP EIA 485). The BACnet translator control is also available as a factory-installed option.
LON translator control provides an interface between
the chiller and Local Operating Network (LON, i.e., LONWorks FT-10A ANSI/EIA-709.1). The LON translator
control is also available as a factory-installed option.
Energy management module provides energy management capabilities to minimize chiller energy consumption.
Several features are provided with this module including
leaving fluid temperature reset, cooling set point reset or
demand limit control from a 4 to 20 mA signal, 2-point
demand limit control (from 0 to 100%) activated by a
remote contact closure, and discrete input for "Ice Done"
indication for ice stage system interface.
Temperature reset sensor provides temperature reset
capability from either the occupied space or outdoor temperature sensor.
NOTE: Temperature reset capability using return temperature is standard.
Vibration isolation pads are neoprene pads for installation under the chiller feet at the jobsite.
Vibration springs provide a set of non-siesmic spring
isolators for installation at the jobsite.
Navigator™ module provides a portable, hand-held display for convenient access to unit status, operation, configuration and troubleshooting diagnostics capability. The
four-line, 20-character LCD (liquid crystal display) display
provides clear language information in English, French,
Spanish, or Portuguese. The Navigator module features an
industrial grade extension chord and magnets located on
the back of the weatherproof enclosure to allow attachment to sheet metal components for hands free operation.

Field-supplied and field-installed insulation
Evaporator waterbox insulation must be field installed.
When insulating waterboxes, allow for service access and
removal of covers. To estimate waterbox cover areas, refer
to the following figure.
Insulation for discharge piping between the compressor and condenser must be field installed on heat machine
units. Refer to the following figure.
Condenser waterbox insulation must be field installed
on heat machine units. When insulating waterboxes, allow
for service access and removal of covers. To estimate
waterbox cover areas, refer to the following figure.

FIELD-SUPPLIED AND FIELD-INSTALLED INSULATION
EVAPORATOR WATERBOX
INSULATION NEEDED

CONDENSER WATERBOX
INSULATION NEEDED (HEAT
MACHINE UNITS ONLY)

DISCHARGE PIPING
INSULATION NEEDED (HEAT
MACHINE UNITS ONLY)

EVAPORATOR WATERBOX
INSULATION NEEDED

NOTES:
1. Field-installed insulation for standard units shown in light gray.
2. Field-installed insulation for heat machine units shown in dark gray.
3. Back of the unit shown.

EVAPORATOR WATERBOX
INSULATION NEEDED

CONDENSER WATERBOX
INSULATION NEEDED (HEAT
MACHINE UNITS ONLY)

a30-4686

Dimensions
30XW UNIT DIMENSIONS

a30-4745

SEE NIH EVAPORATOR
DETAIL FOR NOZZLE
MEASUREMENTS
EVAPORATOR

SUCTION
END

DISCHARGE
END

CONDENSER

SEE NIH CONDENSER
DETAIL FOR NOZZLE
MEASUREMENTS

MLV (OPTIONAL)

STANDARD 30XW UNIT DIMENSIONS
30XW UNIT
OPERATING
SIZE
WEIGHT, lb [kg]
325
350
400

14,319 [6495]
14,515 [6584]
14,759 [6695]

MOUNTING LOCATION WEIGHT, lb [kg]
DIMENSIONS (ft-in. [mm])
1
2
3
4
A
B
C
3734 [1694] 3828 [1736] 3337 [1514] 3420 [1551] 6-3/8 [1837] 6-3/8 [1837] 3/8 [9.53]
3785 [1717] 3880 [1760] 3383 [1535] 3467 [1573] 6-3/8 [1837] 6-3/8 [1837] 3/8 [9.53]
3848 [1745] 3946 [1790] 3439 [1560] 3526 [1599] 6-3/8 [1837] 6-3/8 [1837] 3/8 [9.53]

MLV
MWB
NIH
SSV

—
—
—
—

LEGEND
Minimum Load Valve
Marine Waterbox
Nozzle-In-Head
Suction Service Valve

NOTES:
1. Weights shown for standard chiller (2 pass with NIH, victaulic waterboxes).
2. See page 14 for unit mounting locations.

30XW UNIT AND WATERBOX DIMENSIONS
CONNECTIONS

PASSES

WATERBOX
(EVAP/COND)
NIH/NIH
NIH/MWB

Same Ends
MWB/NIH
MWB/MWB
2 Pass
NIH/NIH
NIH/MWB
MWB/NIH
Opposite Ends
MWB/MWB

1 or
3 Pass

NIH/NIH
NIH/MWB
MWB/NIH
MWB/MWB

NOZZLE
TYPE
Victaulic
Flange
Victaulic
Flange
Victaulic
Flange
Victaulic
Flange
Victaulic
Flange
Victaulic
Flange
Victaulic
Flange
Victaulic
Flange
Flange
Flange
Flange
Flange

D
ft-in. [mm]
3
13-3 /4 [4057]
13-91/16 [4193]

E
ft-in. [mm]

F
ft-in. [mm]

3-113/8 [1210]

6-611/16 [1999]

3-113/8 [1210]

6-611/16 [1999]

13-115/8 [4258]

13-65/16 [4123]
14-47/16 [4380]
14-23/16 [4323]
14-615/16 [4443]
14-213/16 [4339]
14-83/16 [4475]
14-1011/16 [4539]
14-55/8 [4410]
14-1011/16 [4539]

MAX UNIT OPERATING WEIGHT lb [kg]
325
350
400
14,319 [6495]
14,515 [6495]
14,759 [6695]
14,651 [6646]
14,847 [6646]
15,091 [6845]
14,498 [6576]
14,694 [6576]
14,938 [6776]
14,739 [6685]
14,935 [6685]
15,179 [6885]
14,489 [6572]
14,685 [6572]
14,929 [6772]
14,746 [6689]
14,768 [6689]
15,012 [6809]
14,668 [6653]
14,864 [6653]
15,108 [6853]
14,834 [6729]
15,030 [6729]
15,274 [6928]
14,319 [6495]
14,515 [6495]
14,759 [6695]
14,651 [6646]
14,847 [6646]
15,091 [6845]
14,498 [6576]
14,694 [6576]
14,938 [6776]
14,739 [6685]
14,935 [6685]
15,179 [6885]
14,489 [6572]
14,685 [6572]
14,929 [6772]
14,746 [6689]
14,768 [6689]
15,012 [6809]
14,668 [6653]
14,864 [6653]
15,108 [6853]
14,834 [6729]
15,030 [6729]
15,274 [6928]
14,828 [6726]
15,024 [6726]
15,268 [6925]
15,223 [6905]
14,768 [6896]
15,012 [6809]
15,244 [6915]
15,440 [6894]
15,684 [7114]
15,581 [7067]
15,777 [7063]
16,021 [7267]

NOTES:
1. Operating weight includes weight of water, refrigerent, and oil.
2.
Denotes center of gravity.
3. Dimensions shown in ft-in. [mm] unless noted.
4. The recommended service clearance around the machine is 3 ft [914.4 mm].
5. Victaulic nozzles are standard on all units. A flow switch can be factory-installed in evaporator inlet victaulic nozzle.
6. Maximum fluid side pressure of condenser or evaporator is 150 psig [1034 kPa] (standard) or 300 psig [2068 kPa] (optional).
7. Operating weight includes weight of water, refrigerant, and oil.

DISCHARGE
END

INCOMING CONTROL
POWER 1 x 7/8”
KNOCKOUT

a30-4748

DISCHARGE
END

a30-4747
D

DOOR CLEARANCE SPACE

SUCTION
END

30XW UNIT DIMENSIONS (cont)

SUCTION
END

3 3/16”
[81 mm]

EVAP

a30-4755

Dimensions (cont)
30XW UNIT DIMENSIONS (cont)

WATERBOX FLANGE DETAIL

MOUNTING
LOCATIONS

a30-4688

a30-4725

a30-4751

NIH EVAPORATOR

DISCHARGE

SUCTION

UNIT

NUMBER OF
PASSES

A
in. (mm)

B
in. (mm)

61/16 (154)

1
3

30XW325-400

CONNECTION SIZE
Flange

Victaulic

61/16 (154)

0 (0)

61/16 (154)

UNIT

CONNECTION SIZE

NUMBER OF
PASSES

A
in. (mm)

B
in. (mm)

Flange

Victaulic

63/4 (171)

0 (0)

30XW325-400

a30-4750

a30-4752

MARINE CONDENSER

MARINE EVAPORATOR

DISCHARGE

SUCTION

UNIT

30XW325-400

a30-4749

NIH CONDENSER

NUMBER OF
PASSES

A
in. (mm)

B
in. (mm)

71/2 (191)

1
3

CONNECTION SIZE
Flange

Victaulic

71/2 (191)

0 (0)

—

71/2 (191)

—

UNIT
30XW325-400

NUMBER OF
A
PASSES
in. (mm)
2
1

B
in. (mm)

73/8 (187) 73/8 (187)
0 (0)

0 (0)

CONNECTION SIZE
Flange

Victaulic

—

Selection procedure
Carrier’s packaged selection program provides quick,
easy selection of Carrier’s water-cooled chillers. The program considers specific temperature, fluid and flow
requirements among other factors such as fouling and altitude corrections.
Before selecting a chiller, consider the following points:
Leaving water (fluid) temperature (LWT)
• The LWT must be at least 40 F (4.4 C) or greater.
• If the LWT requirement is greater than 60 F (15.5 C), a
mixing loop is required.
Entering water (fluid) temperature (EWT)
• If the EWT requirement is greater than 70 F (21.1 C), a
mixing loop is required. The EWT should not exceed
70 F (21.1 C) for extended operation. Pulldown can be
accomplished from 95 F (35 C).
Evaporator flow rate or evaporator delta-T:
• The evaporator delta-T (EWT – LWT) must fall between
5 and 20° F (2.8 and 11.1° C) while still meeting the
maximum entering requirements.
• For larger or smaller delta-T applications, a mixing loop
is required. If the evaporator flow is variable, the rate of
change of flow should not exceed 10% per minute.
The loop volume in circulation must equal or exceed
3 gallons per nominal ton (3.2 L per kW) of cooling for
temperature stability and accuracy in normal air conditioning applications. In process cooling applications,
there should be 6 to 10 gallons per ton (6.5 to 10.8 L
per kW). To achieve this loop volume, it is often necessary to install a tank in the loop. The tank should be baffled to ensure there is no stratification, and that water
(or brine) entering the tank is adequately mixed with liquid in the tank. See Water Loop Volume in the Application Data section.

Evaporator pressure drop:
• A high evaporator pressure drop can be expected when
the evaporator delta-T is low. A mixing loop can help to
alleviate this situation.
• The three-pass evaporator option is recommended to
increase performance when the evaporator delta T is
high. This is particularly helpful with brine applications.
Condenser pressure drop:
• A high condenser pressure drop can be expected when
the condenser delta-T is low. A one-pass condenser can
help lower pressure drop.
Series chillers:
• One-pass heat exchangers can help lower pressure
drop when heat exchangers are placed in series.
Water quality, fouling factor:
• Poor water quality can increase the required evaporator
fouling factor.
• Higher than standard fouling factors lead to lower
capacity and higher input kW from a given chiller size
compared to running the same application with better
water quality (and lower fouling factors).
Temperature reset:
• Return water (standard)
• Outside air temperature (standard)
• Space temperature (accessory sensor required)
• 4 to 20 mA (requires an energy management module)
Demand limit:
• 2-step (requires an energy management module)
• 4 to 20 mA (requires an energy management module)
• CCN Loadshed

Performance data
EVAPORATOR AND CONDENSER FLOW RATES

30XW UNIT

325

350

400

Two pass
One pass
Three pass
Two pass
One pass
Three pass
Two pass
One pass
Three pass

EVAPORATOR
Leaving Fluid/Entering Fluid
Minimum
Maximum
40 F (4.4 C)/
60 F (15.6 C)/
45 F (7.2 C)
70 F (21.1 C)
Minimum
Maximum
Flow Rate
Flow Rate
GPM
L/s
GPM
L/s
411
25.9
1481
93.4
790
49.8
3126
197.2
247
15.6
987
62.3
433
27.3
1557
98.2
830
52.4
3287
207.4
260
16.4
1038
65.5
486
30.7
1751
110.4
934
58.9
3696
233.1
292
18.4
1167
73.6

CONDENSER
Minimum Entering Maximum Leaving
Fluid
Fluid
65 F (18.3 C)

118 F (47.8 C)*

Minimum
Flow Rate
GPM
L/s
494
31.1
987
62.3
—
—
519
32.7
1038
65.5
—
—
584
36.8
1167
73.6
—
—

Maximum
Flow Rate
GPM
L/s
1974
124.5
3290
207.6
—
—
2076
131.0
3460
218.3
—
—
2334
147.3
3890
245.4
—
—

NOMINAL
Evaporator

Condenser

Nominal
Flow Rate
GPM
L/s
790
49.8
790
49.8
790
49.8
830
52.4
830
52.4
830
52.4
934
58.9
934
58.9
934
58.9

Nominal
Flow Rate
GPM
L/s
987
62.3
987
62.3
—
—
1038
65.5
1038
65.5
—
—
1167
73.6
1167
73.6
—
—

*Maximum condenser fluid temperature shown for standard condensing
option. Heat machine option may have leaving fluid temperatures up to
140 F (60 C).

Performance data (cont)
30XW325-400 EVAPORATOR MARINE WATERBOX

(kPa) ft wg
(119.4) 40.00

Pressure Drop

(104.4) 35.00

3 pass
1 pass

2 pass

(89.5) 30.00
(74.6) 25.00
(59.7) 20.00
(44.8) 15.00
(29.8) 10.00
(14.9) 5.00
(0) 0.00
0
(0)

500
(31.5)

1000
1500
2000
(63.1)
(94.6)
(126.2)
Evaporator Flow Rate

2500
(157.7)

3000 gpm
(189.3) (L/s)

NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over
the entire range of evaporator water flow rates represented.

A30-4691

30XW325-400 EVAPORATOR NIH FLANGE

(kPa) ft wg
(119.4) 40.00

Pressure Drop

1 pass

3 pass

(104.4) 35.00

2 pass

(89.5) 30.00
(74.6) 25.00
(59.7) 20.00
(44.8) 15.00
(29.8) 10.00
(14.9) 5.00
(0) 0.00

0
(0)

LEGEND
NIH — Nozzle-In-Head

500
(31.5)

1000
1500
(63.1)
(94.6)
Evaporator Flow Rate

2000 gpm
(126.2) (L/s)

NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the
entire range of evaporator water flow rates represented.

A30-4692

30XW325-400 EVAPORATOR NIH VICTAULIC

(kPa)

ft wg

(119.4) 40.00
3 pass

Pressure Drop

(104.4) 35.00

1 pass

2 pass

(89.5) 30.00
(74.6) 25.00
(59.7) 20.00
(44.8) 15.00
(29.8) 10.00
(14.9)

5.00

(0)

0.00

0
(0)

500
(31.5)

LEGEND
NIH — Nozzle-In-Head

1000
1500
2000
(63.1)
(94.6)
(126.2)
Evaporator Flow Rate

2500
(157.7)

3000 gpm
(189.3) (L/s)
A30-4693

NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the
entire range of evaporator water flow rates represented.

(kPa) ft wg

30XW325-400 CONDENSER MARINE WATERBOX

(119.4) 40.00

Pressure Drop

(104.4) 35.00

1 pass

2 pass

(89.5) 30.00
(74.6) 25.00
(59.7) 20.00
(44.8) 15.00
(29.8) 10.00
(14.9) 5.00
(0) 0.00

0
(0)

500
(31.5)

1000
(63.1)

1500
(94.6)

2000
(126.2)

2500
(157.7)

3000
(189.3)

3500 gpm
(220.8) (L/s)

Condenser Flow Rate
NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the
entire range of condenser water flow rates represented.
A30-4694

Performance data (cont)
30XW325-400 CONDENSER NIH FLANGE

(kPa) ft wg
(119.4) 40.00

Pressure Drop

(104.4) 35.00

2 pass

1 pass

(89.5) 30.00
(74.6) 25.00
(59.7) 20.00
(44.8) 15.00
(29.8) 10.00
(14.9) 5.00
(0) 0.00

0
(0)

500
(31.5)

1000
(63.1)

1500
(94.6)

2500 gpm
(157.7) (L/s)

2000
(126.2)

Condenser Flow Rate

LEGEND
NIH — Nozzle-In-Head

A30-4695

NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the entire
range of evaporator water flow rates represented.

(kPa) ft wg

30XW325-400 CONDENSER NIH VICTAULIC

(119.4) 40.00
(104.4) 35.00

1 pass

Pressure Drop

2 pass

(89.5) 30.00
(74.6) 25.00
(59.7) 20.00
(44.8) 15.00
(29.8) 10.00
(14.9) 5.00
(0) 0.00

0
(0)

LEGEND
NIH — Nozzle-In-Head

500
(31.5)

1000
(63.1)

1500
(94.6)

2000
(126.2)

2500
(157.7)

Condenser Flow Rate

3000
(189.3)

3500 gpm
(220.8) (L/s)
A30-4696

NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the
entire range of evaporator water flow rates represented.

Controls
Microprocessor
The chiller microprocessor controls overall unit operation
and controls a number of processes simultaneously. These
processes include internal timers, reading inputs, analog to
digital conversions, display control, diagnostic control, output relay control, demand limit, capacity control, head
pressure control, and temperature reset. Some processes
are updated almost continuously, others every 2 to 3 seconds, and some every 30 seconds. The microprocessor
routine is started by switching the emergency ON-OFF
switch to the ON position.

Control sequence
Pre-start — After control switches on, the prestart takes
place. The microprocessor checks itself, and if configured,
energizes the evaporator and condenser pumps to the
internal (or CCN) time schedule (or input occupied signal
from an external system) and waits for temperature to
stabilize.
Start-up — The chiller will receive a call for cooling when
chilled fluid temperature increases above the set point plus
a dead band, or if an override start command is received.
If flow has been proven, the first compressor starts 1 to 3
minutes after the call for cooling. The controlled pulldown
feature limits compressor loading on start up to reduce
demand on start up and unnecessary compressor usage.
Capacity control — On the first call for cooling, the
microprocessor starts the compressor on the lead circuit.
The microprocessor maintains leaving fluid temperature
set point through intelligent positioning of the slide valve.
As the load increases above the compressor's capacity, the
compressor on the lag circuit is started and both compressors are staged together.
Maintaining set point — The control monitors entering
and leaving chilled water temperature to anticipate
changes in cooling load. The speed at which capacity is
added or reduced is controlled by temperature deviation
from set point and rate of temperature change of the
chilled fluid. The basic logic for determining when to add
or remove capacity is a time band integration of deviation
from set point plus rate of change of leaving fluid temperature. When leaving-fluid temperature is close to the set
point and slowly moving closer, logic prevents additional
capacity. Accuracy depends on loop volume, loop flow
rate, load and condenser water temperatures.
Return fluid temperature compensation — No adjustment for cooling range or evaporator flow rate is required
because the control automatically compensates for cooling
range by measuring both return fluid temperature and leaving fluid temperature.
Low temperature override — This feature prevents
LWT (leaving water temperature) from overshooting the
set point to prevent nuisance low suction temperature
trips.
High temperature override — This feature allows the
chiller to add capacity quickly during rapid load variations.
Temperature reset (chilled water reset) — When
latent loads in the conditioned space are reduced, it may be
possible to reset the leaving chilled water temperature set

point to a warmer temperature thereby reducing compressor power usage and saving energy. Three reset options
are offered. With any chilled water reset application, humidity control should be considered since higher coil temperatures will reduce latent capacity. For details on applying a reset option, refer to the Controls, Start-Up, Operation, Service and Troubleshooting guide.
Return fluid temperature reset — This feature
increases LWT set point as return (entering) fluid temperature decreases (indicating load decrease). This option may
be used where return fluid temperature provides accurate
load indication. No additional hardware is required.
Outdoor-air temperature reset — This feature
increases LWT set point as outdoor ambient temperatures
decreases (indicating load decrease). This reset should only
be applied where outdoor ambient temperature is an indication of load. A field-installed thermistor is required.
Space temperature reset — This feature increases the
LWT as space temperature decreases (indicating load
decrease). This reset should only be applied where space
temperature is an indication of load. A field-supplied thermistor is required.
Minimum load control — The main base board (MBB)
responds to the supply chilled water temperature to match
cooling load requirements and controls the minimum load
control valve. The minimum load control valve allows hot
gas to pass directly into the evaporator circuit permitting
the unit to operate at lower loads with less compressor
cycling. Minimum load control should be given consideration when operation is anticipated below the minimum
unloading step.
Pull down control — If pulldown control has been
selected (adjustable setting), no additional capacity is added
as long as the difference between fluid temperature and the
set point is greater than 4 F (2.2 C) and rate of change in
leaving water temperature is greater than the 90 seconds
since the last capacity change, compressors will continue
to run unless a safety device trips. This prevents rapid
cycling and also helps return oil during short operating
periods.
Maximum operating pressure control — If the entering fluid temperature is 95 F (35 C) and the saturated suction temperature is 50 F (10 C) or higher, the maximum
operating pressure (MOP) feature limits the suction to keep
the chiller online. The control automatically starts the
chiller in the unloaded state to eliminate the potential of
compressor overload due to high head pressure or low suction pressure.
Equalized run time — The controller will equalize run
time on each circuit through the lead / lag feature. If a circuit becomes disabled, the control will automatically set the
active circuit to lead, keeping the chiller online at a reduced
capacity.
Sensors — Thermistors are used to control temperature
sensing inputs to the microprocessor. No additional thermistor sensors are required for leaving chilled water temperature, optional return water reset, or outdoor air reset.
The following sensors can be used on 30XW units:
• Evaporator leaving fluid temperature (T1)
19

Controls (cont)
• Evaporator entering fluid temperature (T2)
• Suction gas temperature (T4 - Circuit A, T7 - Circuit B)
• Economizer gas temperature (T5 - Circuit A, T11 Circuit B) (sizes 350, 400 only)
• Space temperature (T8)
• Discharge gas temperature (T9 - Circuit A, T10 Circuit B)
• Condenser entering fluid temperature (T12)
• Condenser leaving fluid temperature (T13)
• Compressor motor temperature
There are 3 (size 325) or 4 (sizes 350, 400) refrigerant
pressure transducers used in each circuit for sensing suction, discharge, oil, and economizer (sizes 350, 400) pressure. The microprocessor uses these inputs to control
capacity.
• Saturated condensing temperature
• Evaporator saturation temperature
Electronic expansion valve (EXV) — The EXV controls refrigerant flow to the evaporator for different operating conditions by varying an orifice size to increase or
decrease the flow area through the valve based on microprocessor input. The orifice is positioned by a stepper
motor through approximately 3,600 discrete steps and is
monitored every 3 seconds.

Safeties
Abnormal conditions — All control safeties in the chiller
operate through compressor protection board, control
relays or the chiller microprocessor. Loss of feedback signal to the MBB will cause the compressor(s) to shut down.
For other safeties, the microprocessor makes appropriate
decision to shut down a compressor due to a safety trip or
bad sensor reading and displays the appropriate failure
code on the display. Chiller holds in safety mode until
reset; it then reverts to normal control when the unit is
reset.
Low-pressure safety — This safety will shut down the
chiller and display the appropriate alarm code if the system
pressure drops below configured minimums.
High-pressure safety — This safety will shut down the
chiller and display the appropriate alarm code if the compressor discharge pressure increases to 185 psig for standard condenser units or 250 psig for high condensing or
heat machine units.
Compressor anti-cycling — This feature monitors compressor starts to limit compressor cycling during periods of
low load.

Loss of flow protection — This feature will shut off the
chiller if the detected flow is below the configured minimum flow rate. Thermal dispersion flow switches are
installed in 30XW chillers to confirm evaporator flow.
Sensor failures — The microprocessor monitors temperature and pressure sensors to ensure readings are
within the expected range. Loss of communication to a
sensor or readings outside of the expected range will
prompt corrective action.
Other safeties — Other safety features include electric
overload, thermal overload protection, oil pressure, loss of
refrigerant charge, loss of phase protection, reverse
rotation protection (prevents compressor start), current
imbalance, and ground current.
Demand limit function — This function can be used to
limit the total power draw of the chiller to a user-defined
set point. The optional energy management module is
required and can provide either 2-step or 4 to 20 mA
demand limit. This optional electronic board interfaces
with the microprocessor to control the number of compressors operating and their operating capacity to limit
power consumption to the user specified value.
The microprocessor can control the number of compressors operating and their operating capacity to limit power
consumption to the user specified value.
Diagnostics — The microprocessor includes a service
test feature that displays the condition of each sensor and
switch in the chiller and allows the observer to check for
proper operation of the compressors. Refer to the Controls, Start Up, Operation, Service and Troubleshooting
guide for further information.
Default settings — To facilitate quick start-ups, 30XW
chillers are pre-configured with a default setting that
assumes stand-alone operation with a 44 F (6.6 C) chilled
water set point. Configuration settings will be based on any
options or accessories included with the unit at the time of
manufacturing. Date and time are set to U.S.A. Eastern
Time zone and will need reconfiguring based on location
and local time zone. If operation based on occupancy
schedule is desired, the schedule must be set during
installation.
Additional information — Detailed information on controls and operation is available in the Controls, Start-Up,
Operation, Service and Troubleshooting guide included
with each unit. Packaged Service Training programs are
also available. Contact your local Carrier representative for
more information.

Typical control wiring schematics
30XW UNIT CONTROL WIRING SCHEMATIC

a30-4697

AWG
CB
COM
EMM
EQUIP GND
FIOP
MLV

—
—
—
—
—
—
—

LEGEND
American Wire Gage
Circuit Breaker
Communication Port
Energy Management Module
Equipment Ground
Factory-Installed Option
Minimum Load Valve

NEC
PMP
PMPI
TB

—
—
—
—

National Electrical Code
Chilled Water Pump
Chilled Water Pump Interlock
Terminal Block
Field Power Wiring
Field Control Wiring
Factory-Installed Wiring

NOTES:
1. Factory wiring is in accordance with UL 1995 standards. Field modifications or additions must be in compliance with all applicable codes.
2. Wiring for main field supply must be rated 75C minimum. Use copper for
all units. Incoming wire size range for the terminal block is #4 AWG to
500 kcmil for single point power (two conductors per phase). Incoming
wire size range for the terminal blocks for dual point power option is
#4 AWG to 500 kcmil for single point power (one conductor per phase).
Incoming wire size range for 200/300-v models is 3/0 to 500 kcmil for single point power (one conductor per phase).
3. Terminals 9 and 10 of TB5 are for field external connections for remote
on-off. The contacts must be rated for dry circuit application capable of
handling a 24-vac load up to 50 mA.
4. Terminals 1 and 2 of TB5 are for external connections of chilled water
pump interlock. The contacts must be rated for dry circuit application
capable of handling a 24-vac load up to 50 mA.
5. Terminals 11 and 13 of TB5 are for control of chilled water pump 1
(PMP 1) starter. Terminals 15 and 13 of TB5 are for control of chilled
water pump 2 (PMP 2) starter. Remove factory-installed jumper when
using pump interlock. The maximum load allowed for the chilled water
pump relay is 5-va sealed, 10-va inrush at 24-v. Field power supply is not
required.

6. For control of chilled water pumps, a set of normally open contacts rated
for dry circuit application must be supplied from field-supplied pump
starter relay. Connect contacts directly to connector at main base board
channel 18.
7. Terminals 12 and 13 of TB5 are for an alarm relay. The maximum load
allowed for the alarm relay is 10-va sealed, 25-va inrush at 24-v. Field
power supply is not required.
8. Make appropriate connections to TB6 as shown for energy management
board options. The contacts for occupancy override, demand limit, and
ice done options must be rated for dry circuit application capable for handling a 24-vac load up to 50 mA.
9. Terminal blocks TB5 and TB6 are located in the display panel box for all
units. Refer to certified dimensional drawing for each unit to get the exact
locations.
10. Refer to certified dimensional drawings for exact locations of the main
power and control power entrance locations.
11. For control of condenser pump, connect field-supplied relay (max 5-va
sealed, 10-va inrush at 24-v) directly to connector at main base board
channel 22.
12. For head pressure control option, 0-10-vdc signal wires are factoryinstalled (violet and brown) from HGBP/COND board channel 9. Refer to
controls manual for application with field-supplied water regulating valve.

Application data
Unit storage

Evaporator flow range

Store chiller and starter indoors, protected from construction dirt and moisture. Inspect under shipping tarps, bags,
or crates to be sure water has not collected during transit.
Keep protective shipping covers in place until machine is
ready for installation. Assure that the inside of the protective cover meets the following criteria:
• Temperature is between 40 F (4.4 C) and 120 F
(48.9 C)
• Relative humidity is between 10% and 80% (noncondensing)

For minimum and maximum evaporator flow rates please
see the Evaporator and Condenser Flow Rates table. A
high flow rate is generally limited by the maximum pressure drop that can be tolerated by the unit. The 30XW
chillers are designed for a full load temperature rise of 5 to
20 F (2.8 to 11.1 C). See the Carrier selection program for
pressure drop values and performance.

Chiller location
Unit should be located indoors on a level surface in an area
with temperatures between 50 F (10 C) and 104 F (40 C).
Clearance should be provided around the unit for service
and local code requirements. See dimensional drawings for
specific unit clearance requirements. Consideration should
be given to using rubber-in-shear pads. For applications
other than ground to slab, it is recommended spring isolators are used to minimize structure borne transmission.
Acoustic consideration should be given near sound sensitive areas.
Relief valve vent lines:
1. Vent per local code requirements.
2. Each chiller has 2 relief valves on the evaporator, 2
on the condenser and one relief valve on each compressor discharge line.

Minimum evaporator flow
When system design conditions require a lower flow (or
higher temperature rise) than the minimum allowable evaporator flow rate, please follow the recommendations
below.
• Multiple smaller chillers may be applied in series, each
providing a portion of the design temperature rise.
• Try increasing the number of passes in the evaporator
(1, 2, or 3 passes available).
• Evaporator fluid may be recirculated to raise the flow
rate to the chiller. The mixed temperature entering the
evaporator must be maintained to a minimum of at least
5 ° F (2.8 ° C) above the leaving chilled fluid temperature and a maximum of no more than 20 F (11.1 C)
above the leaving chilled fluid temperature.
NOTE: Recirculation flow is shown below.

Maximum evaporator flow
RECIRCULATION FLOW

Strainers
A screen strainer with minimum screen size of 20 mesh
must be installed within 10 ft (3 m) of the inlet pipe connection to both the evaporator and condenser to prevent
debris from damaging internal tubes of the evaporator. The
pump strainer shall not be used to meet this requirement.

CHILLER EVAPORATOR

a30-4698

Oversizing chillers
Oversizing chillers by more than 15% at design conditions
should be avoided as the system operating efficiency is
adversely affected (resulting in greater or excessive electrical demand). When future expansion of equipment is anticipated, install a single chiller to meet present load
requirements and add a second chiller to meet the additional load demand. It is also recommended that 2 smaller
chillers be installed where operation at minimum load is
critical. The operation of a smaller chiller loaded to a
greater percentage over minimum is preferred to operating
a larger chiller at or near its minimum recommended value.
Operation at its minimum load should only be done intermittently, not for long periods of time. Minimum load control should not be used as a means to allow oversizing
chillers.

The maximum evaporator flow (approximately 5 ° F
(2.8 ° C) rise results in a practical maximum pressure drop
through the evaporator. Optional marine waterboxes may
help reduce pressure drop by a small amount. If this is
insufficient, a return fluid may bypass the evaporator to
keep the pressure drop through the evaporator within
acceptable limits. This permits a higher delta T with lower
fluid flow through the evaporator and mixing after the
evaporator.
NOTE: Bypass flow is shown below.
BYPASS FLOW
CHILLER EVAPORATOR

Evaporator water temperature
Maximum leaving fluid temperature for the unit is 60 F
(15.5 C). The unit can start and pull down with up to 95 F
(35 C) entering fluid temperature. For sustained operation,
it is recommended the fluid temperature not exceed 70 F
(21.1 C). Water flowing through the evaporator should
never exceed 100 F (37.8 C). Minimum leaving water temperature is 40 F (4.4 C).
22

a30-4699

Variable evaporator flow rates
Variable flow rates may be applied to a standard chiller.
The unit will, however, attempt to maintain a constant
leaving fluid temperature. In such cases minimum flow
must be in excess of minimum flow given in the
Evaporator and Condenser Flow Rates table, and minimum loop volume must be in excess of 3 gallons per ton
(3.21 L per kW). Combined flow rate and change in load
must not change by more than 10% per minute. Additional
loop volume may be necessary to ensure fluid is not quickly
recirculated back to the chiller before the chiller has
adjusted to the previous change in flow rate and load
condition.

Water loop volume
The loop volume in circulation must equal or exceed 3 gal.
per nominal ton (3.2 L per kW) of cooling for temperature
stability and accuracy in normal air-conditioning applications. In process cooling applications, there should be 6 to
10 gallons per ton (6.5 to 10.8 L per kW). To achieve this
loop volume, it is often necessary to install a tank in the
loop. The tank should be baffled to ensure there is no stratification, and that water (or brine) entering the tank is adequately mixed with liquid in the tank. See Tank installation
drawing.
TANK INSTALLATION

GOOD

BAD

concentration of at least 15 ° F (8.3 ° C) below the leaving
fluid temperature set point. If chiller fluid lines are in an
area where ambient conditions fall below 34 F (1.1 C), it is
recommended that an antifreeze solution be added to protect the unit and fluid piping to a temperature 15 ° F
(8.3 ° C) below the lowest anticipated temperature. For
corrections to performance, refer to the chiller selection
program.
NOTE: Use only antifreeze solutions approved for heat
exchanger duty. Use of automotive antifreeze is not recommended because of the fouling that can occur once their
relatively short-lived inhibitors break down.

Multiple chillers
Where multiple chillers are required, or where standby
capability is desired, chillers may be installed in parallel.
Units may be of the same or different sizes. However,
evaporator flow rates must be balanced according to the
recommendations of each chiller to ensure proper flow.
Unit software is capable of controlling two units as a single plant. Refer to the Controls, Start-Up, Operation, Service and Troubleshooting guide for further details.

Dual chiller control
The chiller on board controller allows 2 chillers (piped in
parallel or series) to operate as a single chilled water plant
with standard control functions coordinated through the
master chiller controller. This feature requires a communication link between the 2 chillers. There are several advantages to this type of control:
• Redundancy (multiple circuits)
• Better low load control (lower tonnage capability)
• Lower rigging lift weights (2 machines rather than one
large machine)
• Chiller lead-lag operation (evens the wear between the
two machines)

Parallel chiller operation

BAD

a30-3185

GOOD

Evaporator fouling factor
The fouling factor used to calculate tabulated ratings is
0.0001 sq ft ⋅ hr °F/Btu (0.000018 sq m ⋅ ° C/W). As
fouling factor is increased, both unit capacity and EER
(Energy Efficiency Ratio) decrease. The impact of the fouling factor on performance varies significantly with chiller
size and application conditions. Ratings must be determined by the Carrier selection program.

Condenser minimum flow rate
The minimum condenser flow rate is shown in the Minimum and Maximum Condenser Flow Rate Table. If the
condenser flow rate is below the minimum rate shown, try
increasing the number of condenser passes (1 or 2 pass
available).

Evaporator and condenser freeze protection

Parallel chiller operation is the recommended option for
dual chiller control. In this case, each chiller must control
its own dedicated pumps or isolation valves. Balancing
valves are recommended to ensure the proper flow to each
chiller. Two field-supplied and installed dual chiller leaving
water temperature sensors are required (one for each module) for this function to operate properly.
Consider adding additional isolation valves to isolate
each chiller to allow for service on the machine, and still
allow for partial capacity from the other chiller.

Series chiller operation
Series chiller operation is an alternate control method supported by the chiller control system. Certain applications
might require that two chillers be connected in series. For
nominal 10 F (5.6 C) evaporator ranges, use the one-pass
heat exchanger options to reduce fluid side pressure drop.
Use the standard pass arrangement for low flow, high temperature rise applications. Two field-supplied and installed
dual chiller leaving water temperature sensors are required
(one for each module) for this function to operate properly.

The solution concentration must be sufficient to protect the
chilled water loop to a freeze protection (first crystals)
23

Application data (cont)
Consider adding additional piping and isolation valves to
isolate each chiller to allow for service on the machine, and
still allow for partial capacity from the other chiller.
Even if evaporators are piped in series, parallel condenser piping should be considered on constant speed
chillers to maximize capacity and efficiency while minimizing condenser pressure drop and saturated condensing
temperatures. If the condensers are piped in series, ensure
that the leaving fluid temperature does not exceed 122 F
(50 C) for standard units, or 140 F (60 C) for high condensing or heat machine condensers.

Electric utility interests
Energy management — Use of energy management
practices can significantly reduce operating costs, especially during off-peak modes of operation. Demand limiting
and temperature reset are two techniques for accomplishing efficient energy management. See Demand Limiting
(also called load shedding) section below for further details.
Demand limiting (load shedding) — When a utility's
demand for electricity exceeds a certain level, loads are

shed to keep electricity demand below a prescribed maximum level. Typically, this happens on hot days when air
conditioning is most needed. The energy management
module (EMM) option can be added to accomplish this
reduction. Demand may be limited on the unit by resetting
water temperature, or by unloading the chiller to a given
predetermined percentage of the load. Demand limit may
also be driven by an external 4 to 20 mA signal. These features require a signal from an intelligent central control.
Duty cycling — Duty cycling will cycle an electrical load
at regular intervals regardless of need. This reduces the
electrical demand by "fooling" demand measuring devices.
Duty cycling of the entire compressor is NOT recommended since motor windings and bearing life will suffer
from constant cycling.
Remote on-off control — Remote on-off control may be
applied by hard-wired connection (see the Controls,
Start-Up, Operation, Service and Troubleshooting guide)
or by connection to the Carrier Comfort Network® (CCN)
system.

SHUT-OFF
VALVE

BALANCING
VALVE

STRAINER

SHUT-OFF
VALVE

VIBRATION
ISOLATION

PRESSURE
GAGE

VIBRATION
ISOLATION

VENT

INLET

OUTLET

DRAIN

CONTROL POWER
SUPPLY *

CONDENSER
30XW

MAIN POWER
SUPPLY

TO CONDENSER
WATER PUMP

TO CHILLED
WATER PUMP

LEGEND
Field Wiring
Field Piping

a30-4700

CONDENSER
WATER
OUTLET

CONDENSER
WATER
INLET

FROM
COOLING
LOAD

TO
COOLING
LOAD

SHUT-OFF
VALVE

INSULATE EVAPORATOR
HEADS, BOTH ENDS

EVAPORATOR

*Control power supply is not required for chillers ordered with the control power transformer option.
NOTES:
1. Wiring and piping shown are for general point-of-connection only and are not intended to show details for a
specific installation. Certified field wiring and dimensional diagrams are available upon request. The 30XW
units should be installed using certified drawings.
2. All wiring must comply with applicable codes.
3. Refer to Carrier System Design Manual for details regarding piping techniques.
4. Piping, wiring, switches, valves, vent gages, strainers, drain, and vibration isolation are all field supplied.
5. Water connections are shown on left side (discharge end) of control box in this figure. Actual connections
can be on either side according to chiller configuration ordered.

TYPICAL PIPING AND WIRING FOR 30XW EVAPORATOR AND CONDENSER

Typical piping and wiring

Electrical data
STANDARD SINGLE INPUT POWER CONFIGURATION
30XW
UNIT
SIZE

325

325
HM

350

350
HM

400

400
HM

UNIT VOLTAGE
Supplied
V-Ph-Hz
Min
Max
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633

ICF

LEGEND
— Maximum Instantaneous Current Flow

— Heat Machine Units

LRA
MCA
MOCP
RLA
WD
XL

—
—
—
—
—
—

NO. POWER
SUPPLY
CONDUCTORS

MCA

9
9
6
6
3
12
9
6
6
6
9
9
6
6
3
12
9
6
6
6
9
9
6
6
3
12
12
6
6
6

920.3
799.0
487.6
401.0
317.3
1168.2
1018.4
614.5
510.8
406.8
920.3
799.0
487.6
401.0
317.3
1168.2
1018.4
614.5
510.8
406.8
1041.3
902.9
545.2
452.9
366.3
1329.8
1156.7
700.9
579.8
464.4

Locked Rotor Amps
Minimum Circuit Ampacity (for wire sizing)
Maximum Overcurrent Protection
Rated Load Amps
Wye-Delta Start
Across-the-Line Start

NOTES:
1. Each main power source must be supplied from a field-supplied fused
electrical service with a (factory-installed or field-installed) disconnect
located in sight from the unit.
2. Control circuit power must be supplied from a separate source through
a field-supplied disconnect. An optional control transformer may be
used to provide control circuit power from the main unit power supply.

ICF

MOCP
1200
1000
700
500
450
1600
1200
800
700
500
1200
1000
700
500
450
1600
1200
800
700
500
1200
1200
700
600
500
1600
1600
1000
800
600

WD
1347.0
1171.1
710.7
586.2
467.0
1848.2
1608.6
973.1
805.0
642.8
1347.0
1171.1
710.7
586.2
467.0
1848.2
1608.6
973.1
805.0
642.8
1400.8
1217.3
736.3
609.3
488.8
1920.0
1670.1
1011.5
835.7
668.4

XL
—
—
1753.7
1448.2
1157.0
—
—
2452.1
2027.0
1620.8
—
—
1753.7
1448.2
1157.0
—
—
2452.1
2027.0
1610.8
—
—
1779.3
1471.3
1178.6
—
—
2490.5
2057.7
1646.4

CONTROL CIRCUIT

REC FUSE
SIZE

V-Ph-Hz

MCA and
MOCP

1200
1000
600
450
400
1600
1200
700
600
450
1200
1000
600
450
400
1600
1200
700
600
450
1200
1200
700
600
450
1600
1600
800
700
600

115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60
115-1-60

20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20

3. Maximum instantaneous current flow (ICF) during start-up is the point
in the starting sequence where the sum of the LRA for the start-up
compressor, plus the total RLA for all running compressors is at a
maximum.
4. Maximum incoming wire size for each terminal block is 500 kcmil.
5. Maximum allowable phase imbalance is: voltage, 2%; amps, 5%.
6. Use copper conductors only.
7. The MOCP is calculated as follows:
MOCP = (2.25) (largest RLA) + the sum of the other RLAs. Size the
fuse one size down from the result. The RLAs are listed on the
nameplate.
The recommended fuse size in amps (RFA) is calculated as follows:
RFA = (1.50) (largest RLA) + the sum of the other RLAs. Size the fuse
one size up from the result. The RLAs are listed on the nameplate.

OPTIONAL DUAL INPUT POWER CONFIGURATION
UNIT VOLTAGE
Supplied
V-Ph-Hz
Min
Max
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633
200-3-60
187
220
230-3-60
207
253
380-3-60
342
418
460-3-60
414
506
575-3-60
518
633

30XA
UNIT
SIZE

325

325
HM

350

350
HM

400

400
HM

NO. POWER
SUPPLY
CONDUCTORS

MCA

6/6
6/6
3/3
3/3
3/3
6/6
6/6
3/3
3/3
3/3
6/6
6/6
3/3
3/3
3/3
6/6
6/6
3/3
3/3
3/3
6/6
6/6
3/3
3/3
3/3
6/6
6/6
6/6
3/3
3/3

511.3/511.3
443.9/443.9
270.9/270.9
222.8/222.8
176.3/176.3
649.0/649.0
565.8/565.8
341.4/341.4
283.8/283.8
226.0/226.0
511.3/511.3
443.9/443.9
270.9/270.9
222.8/222.8
176.3/176.3
649.0/649.0
565.8/565.8
341.4/341.4
283.8/283.8
226.0/226.0
578.5/578.5
501.6/501.6
302.9/302.9
251.6/251.6
203.5/203.5
738.8/738.8
642.6/642.6
389.4/389.4
322.1/322.1
258.0/258.0

ICF

LEGEND
— Maximum Instantaneous Current Flow

— Heat Machine Units

LRA
MCA
MOCP
RLA
WD
XL

—
—
—
—
—
—

Locked Rotor Amps
Minimum Circuit Ampacity (for wire sizing)
Maximum Overcurrent Protection
Rated Load Amps
Wye-Delta Start
Across-the-Line Start

NOTES:
1. Each main power source must be supplied from a field-supplied fused
electrical service with a (factory-installed or field-installed) disconnect
located in sight from the unit.
2. Control circuit power must be supplied from a separate source through a
field-supplied disconnect. An optional control transformer may be used
to provide control circuit power from the main unit power supply.

MOCP
800/800
700/700
450/450
400/400
300/300
1000/1000
1000/1000
600/600
500/500
400/400
800/800
700/700
450/450
400/400
300/300
1000/1000
1000/1000
600/600
500/500
400/400
1000/1000
800/800
500/500
450/450
350/350
1200/1200
1000/1000
600/600
500/500
450/450

ICF
WD
938/938
816/816
494/494
408/408
326/326
1329/1329
1156/1156
700/700
578/578
462/462
938/938
816/816
494/494
408/408
326/326
1329/1329
1156/1156
700/700
578/578
462/462
938/938
816/816
494/494
408/408
326/326
1329/1329
1156/1156
700/700
578/578
462/462

XL
—
—
1537/1537
1270/1270
1016/1016
—
—
2179/2179
1800/1800
1440/1440
—
—
1537/1537
1270/1270
1016/1016
—
—
2179/2179
1800/1800
1440/1440
—
—
1537/1537
1270/1270
1016/1016
—
—
2179/2179
1800/1800
1440/1440

REC FUSE
SIZE

CONTROL CIRCUIT
V-Ph-Hz

700 700 115-1-60
600 600 115-1-60
350 350 115-1-60
300 300 115-1-60
225 225 115-1-60
800 800 115-1-60
700 700 115-1-60
450 450 115-1-60
350 350 115-1-60
300 300 115-1-60
700 700 115-1-60
600 600 115-1-60
350 350 115-1-60
300 300 115-1-60
225 225 115-1-60
800 800 115-1-60
700 700 115-1-60
450 450 115-1-60
350 350 115-1-60
300 300 115-1-60
700 700 115-1-60
700 700 115-1-60
400 400 115-1-60
350 350 115-1-60
250 250 115-1-60
1000 1000 115-1-60
800 800 115-1-60
500 500 115-1-60
400 400 115-1-60
350 350 115-1-60

MCA and
MOCP
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20

3. Maximum instantaneous current flow (ICF) during start-up is the point in
the starting sequence where the sum of the LRA for the start-up compressor, plus the total RLA for all running compressors is at a maximum.
4. Maximum incoming wire size for each terminal block is 500 kcmil.
5. Maximum allowable phase imbalance is: voltage, 2%; amps, 5%.
6. Use copper conductors only.
7. The MOCP is calculated as follows:
MOCP = (2.25) (largest RLA) + the sum of the other RLAs. Size the fuse
one size down from the result. The RLAs are listed on the nameplate.
The recommended fuse size in amps (RFA) is calculated as follows:
RFA = (1.50) (largest RLA) + the sum of the other RLAs. Size the fuse
one size up from the result. The RLAs are listed on the nameplate.

Electrical data (cont)
COMPRESSOR ELECTRICAL DATA
30HX UNIT
SIZE

325

325 HM

350

350 HM

400

400 HM

HM
LRA
N/A
RLA
WD
XL

—
—
—
—
—
—

VOLTAGE
V-Ph-Hz

COMPRESSOR

200-3-60
230-3-60
380-3-60
460-3-60
575-3-60
200-3-60
230-3-60
380-3-60
460-3-60
575-3-60
200-3-60
230-3-60
380-3-60
460-3-60
575-3-60
200-3-60
230-3-60
380-3-60
460-3-60
575-3-60
200-3-60
230-3-60
380-3-60
460-3-60
575-3-60
200-3-60
230-3-60
380-3-60
460-3-60
575-3-60

06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU483
06TU554
06TU554
06TU554
06TU554
06TU554
06TU554
06TU554
06TU554
06TU554
06TU554

LEGEND
Heat Machine Units
Locked Rotor Amps
Not Applicable
Rated Load Amps
Wye-Delta Start
Across-the-Line Start

RLA
409.0
355.1
216.7
178.2
141.0
519.2
452.6
273.1
227.0
180.8
409.0
355.1
216.7
178.2
141.0
519.2
452.6
273.1
227.0
180.8
462.8
401.3
242.3
201.3
162.8
591.0
514.1
311.5
257.7
206.4

COMPRESSOR A
LRA (WD)
LRA (XL)
938
N/A
816
N/A
494
1537
408
1270
326
1016
1329
N/A
1156
N/A
700
2179
578
1800
462
1440
938
N/A
816
N/A
494
1537
408
1270
326
1016
1329
N/A
1156
N/A
700
2179
578
1800
462
1440
938
N/A
816
N/A
494
1537
408
1270
326
1016
1329
N/A
1156
N/A
700
2179
578
1800
462
1440

RLA
409.0
355.1
216.7
178.2
141.0
519.2
452.6
273.1
227.0
180.8
409.0
355.1
216.7
178.2
141.0
519.2
452.6
273.1
227.0
180.8
462.8
401.3
242.3
201.3
162.8
591.0
514.1
311.5
257.7
206.4

COMPRESSOR B
LRA (WD)
LRA (XL)
938
N/A
816
N/A
494
1537
408
1270
326
1016
1329
N/A
1156
N/A
700
2179
578
1800
462
1440
938
N/A
816
N/A
494
1537
408
1270
326
1016
1329
N/A
1156
N/A
700
2179
578
1800
462
1440
938
N/A
816
N/A
494
1537
408
1270
326
1016
1329
N/A
1156
N/A
700
2179
578
1800
462
1440

Guide specifications
Water-Cooled Chiller
HVAC Guide Specifications
Size Range: 325 to 400 Nominal Tons
(1133 to 1354 kW)
Carrier Model Number: 30XW
Part 1 — General
1.01 SYSTEM DESCRIPTION
Microprocessor controlled water-cooled liquid chiller
utilizing screw compressors and electronic expansion valves.
1.02 QUALITY ASSURANCE
A. Unit shall be rated in accordance with AHRI Standard 550/590 (U.S.A.), latest edition.
B. Unit construction shall comply with ASHRAE 15
Safety Code, NEC, and ASME applicable codes
(U.S.A. codes).
C. Unit shall be manufactured in a facility registered to
ISO 9001:2000 Manufacturing Quality Standard.
D. 200-v, 230-v, 460-v, 575-v, 60 Hz units shall be
constructed in accordance with UL or UL Canada
standards and shall be tested and listed by ETL or
ETL, Canada, as conforming to those standards.
Units shall carry the ETL and ETL, Canada, labels.
1.03 DELIVERY, STORAGE, AND HANDLING
A. Unit controls shall be capable of withstanding 150 F
(65.5 C) storage temperatures in the control
compartment.
B. Chiller and starter should be stored indoors, protected from construction dirt and moisture. An
inspection should be conducted under shipping
tarps, bags, or crates to be sure water has not collected during transit. Protective shipping covers
should be kept in place until machine is ready for
installation. The inside of the protective cover
should meet the following criteria:
1. Temperature is between 40 F (4.4 C) and
120 F (48.9 C).
2. Relative humidity is between 10% and 80%
(non-condensing).
Part 2 — Products
2.01 EQUIPMENT
A. General:
Factory assembled, single-piece, water-cooled liquid
chiller with dual (2) independent refrigerant circuits.
Contained within the unit cabinet shall be all factory
wiring, piping, controls, refrigerant charge (HFC134a) and special features required prior to field
start-up.
B. Compressors:
1. Semi-hermetic twin-screw compressors with
internal muffler and check valve.
2. Each compressor shall be equipped with a discharge shutoff valve.

C. Evaporator:
1. Shall be tested and stamped in accordance
with ASME Code (U.S.A.) for a refrigerant
working-side pressure of 220 psig (1408 kPa).
Water-side pressure rating shall be 150 psig
(1034 kPa). In Canada, maximum water-side
pressure shall be 250 psig (1725 kPa), per the
Canadian National Registry.
2. Shall be mechanically cleanable shell-and-tube
type with removable heads.
3. Tubes shall be internally enhanced, seamlesscopper type, and shall be rolled into tube
sheets.
4. Shall be equipped with victaulic fluid
connections.
5. Shell shall be insulated with 3/4-in. (19-mm)
closed-cell, polyvinyl chloride foam with a maximum K factor of 0.28. Heads may require field
insulation.
6. Shall have a evaporator drain and vent.
7. Design shall incorporate 2 independent refrigerant circuits.
8. Shall include isolation valves to allow isolation
of the refrigerant charge in either the evaporator or the condenser.
9. Shall be equipped with factory-installed thermal
dispersion chilled fluid flow switch.
D. Condenser:
1. Shall be tested and stamped in accordance
with ASME code (U.S.A.) for a refrigerant
working-side pressure of 220 psig (1408 kPa).
Water-side pressure rating shall be 150 psig
(1034 kPa). In Canada, maximum water-side
pressure shall be 250 psig (1725 kPa), per the
Canadian National Registry.
2. Shall be mechanically cleanable shell-and-tube
type with removable heads.
3. Tubes shall be internally enhanced, seamlesscopper type, and shall be rolled into tube
sheets.
4. Shall be equipped with victaulic water
connections.
5. Design shall incorporate 2 independent refrigerant circuits.
E. Heat Machines:
1. Condenser shall be tested and stamped in
accordance with ASME Code (U.S.A.) for a
refrigerant working-side pressure of 300 psig
(2068 kPa).
2. Design shall incorporate 2 independent refrigerant circuits.
3. Heat machine condensers shall include factoryinstalled thermal insulation on the condenser,
condenser flow switch and leaving water
temperature sensor. Heat machine units
require field-installed thermal insulation on the

Guide specifications (cont)
compressor discharge piping and waterbox
heads because of high temperature.
F. Refrigeration Components:
Refrigerant circuit components shall include oil separator, high and low side pressure relief devices, discharge and liquid line shutoff valves, filter drier,
moisture indicating sight glass, expansion valve,
refrigerant economizer (unit sizes 350, 400), and
complete charge of compressor oil. The units shall
have a complete operating charge of refrigerant
HFC-134a.
G. Controls:
1. Unit controls shall include the following minimum components:
a. Microprocessor with non-volatile memory.
Battery backup system shall not be accepted.
b. Separate terminal block for power and
controls.
c. Separate 115-v power supply to serve all
controllers, relays, and control components.
d. ON/OFF control switch.
e. Replaceable solid-state controllers.
f. Pressure sensors installed to measure
suction, oil, economizer, and discharge
pressure. Thermistors installed to measure
evaporator entering and leaving fluid
temperatures.
2. Unit controls shall include the following
functions:
a. Automatic circuit lead/lag.
b. Capacity control based on leaving chilled
fluid temperature and compensated by rate
of change of return-fluid temperature with
temperature set point accuracy to 0.1° F
(0.05° C).
c. Limiting the chilled fluid temperature
pulldown rate at start-up to an adjustable
range of 0.2° F to 2° F (0.1 to 1.1° C) per
minute to prevent excessive demand spikes
at start-up.
d. Seven-day time schedule.
e. Leaving chilled fluid temperature reset from
return fluid and outside air temperature.
f. Chilled water and condenser water pump
start/stop control.
g. Chiller control for parallel chiller applications
without addition of hardware modules and
control panels (requires thermistors).
h. Timed maintenance scheduling to signal
maintenance
activities
for
strainer
maintenance and user-defined maintenance
activities.
i. Single step demand limit control activated by
remote contact closure.

H. Safeties:
Unit shall be equipped with thermistors and all necessary components in conjunction with the control
system to provide the unit with the following
protections:
1. Loss of refrigerant charge.
2. Reverse rotation.
3. Low chilled fluid temperature.
4. Motor overtemperature.
5. High pressure.
6. Electrical overload.
7. Loss of phase.
8. Loss of chilled water flow
I. Diagnostics:
1. The control panel shall include, as standard, a
display:
a. Touch screen display consisting of ¼ VGA
LCD (liquid crystal display) with adjustable
contrast and backlighting.
b. Display shall allow a user to navigate
through menus, select desired options and
modify data.
2. Features of the display shall include:
a. Display shall be customizable and allow up to
72 data points.
b. Display shall support both local equipment
or network made for remote mount.
c. Display shall allow access to configuration,
maintenance, service, set point, time schedules, alarm history and status data.
d. Display shall have one button for chiller on/
off.
e. Display shall include three levels of password
protection against unauthorized access to
configuration and maintenance information, and display set up parameters.
f. Display shall allow for easy connection of a
portable hand held technician tool to access
information and upload and/or download
chiller settings.
g. Display shall be compatible with the Carrier
Comfort Network® (CCN) system and provide network alarm acknowledgement or
indication and provide capability to fully
monitor and control chiller.
h. Display alarms and parameters shall be
capable of being displayed in full text.
i. Display shall be capable of displaying the last
50 alarms and will store a snapshot of a
minimum of 20 status data parameters for
each alarm.
j. Compressor run hours.
k. Compressor number of starts.
l. Compressor current.

m. Time of day:
1) Display module, in conjunction with the
microprocessor, must also be capable of
displaying the output (results) of a service test. Service test shall verify operation of every switch, thermistor, and
compressor before chiller is started.
2) Diagnostics shall include the ability to
review a list of the 30 most recent
alarms with clear language descriptions
of the alarm event. Display of alarm
codes without the ability for clear language descriptions shall be prohibited.
3) An alarm history buffer shall allow the
user to store no less than 30 alarm
events with clear language descriptions,
time and date stamp event entry.
4) The chiller controller shall include multiple connection ports for communicating
with the local equipment network, the
Carrier Comfort Network (CCN) system and the ability to access all chiller
control functions from any point on the
chiller.
5) The control system shall allow software
upgrade without the need for new hardware modules.
J. Operating Characteristics:
Unit shall be capable of starting up with 95 F (35 C)
entering fluid temperature to the evaporator.
K. Electrical Requirements:
1. Unit primary electrical power supply shall enter
the unit at a single location.
2. Unit shall operate on 3-phase power at the voltage shown in the equipment schedule.
3. Control voltage shall be 115-v (60 Hz), singlephase, separate power supply.
L. Special Features:
Certain standard features are not applicable when
the features designated by * are specified. For assistance in amending the specifications, contact your
local Carrier Sales office.
* 1. Wye-Delta Starter:
Unit shall have a factory-installed, wye-delta
starter to minimize electrical inrush current.
2. Vibration Isolation:
Unit shall be supplied with rubber-in-shear
vibration isolators for field installation.
3. Control Power Transformer:
Unit shall be supplied with a factory-installed
controls transformer that will supply control circuit power from the main unit power supply.
4. Temperature Reset Sensor:
Unit shall reset leaving chilled fluid temperature
based on outdoor ambient temperature or
space temperature when this sensor is installed.

* 5. Minimum Load Control:
Unit shall be equipped with factory-installed,
microprocessor-controlled, minimum load control that shall permit unit operation down to
10% of full capacity.
6. One-Pass Evaporator:
Factory-installed option shall reduce pressure
drop for high flow applications.
7. Three-Pass Evaporator:
Factory-installed option shall enhance performance for low flow applications.
8. Energy Management Module:
A factory or field installed module shall provide
the following energy management capabilities:
4 to 20 mA signals for leaving fluid temperature
reset, cooling set point reset or demand limit
control; 2-point demand limit control (from 0 to
100%) activated by a remote contact closure;
and discrete input for "Ice Done" indication for
ice storage system interface.
9. BACnet™ Translator Control:
Unit shall be supplied with field-installed interface between the chiller and a BACnet Local
Area Network (LAN, i.e., MS/TP EIA-485).
10. LON Translator Control:
Unit shall be supplied with field-installed interface between the chiller and a Local Operating
Network (LON, i.e., LonWorks® FT-10A
ANSI/EIA-709.1).
11. Navigator™ Hand Held Portable Display:
a. Portable hand held display module with a
minimum of 4 lines and 20 characters per
line, or clear English, Spanish, Portuguese
or French language.
b. Display menus shall provide clear language
descriptions of all menu items, operating
modes, configuration points and alarm diagnostics. Reference to factory codes shall not
be accepted.
c. RJ-14 connection plug shall allow display
module to be connected to factory-installed
receptacle.
d. Industrial grade coiled extension cord shall
allow the display module to be moved
around the chiller.
e. Magnets shall hold the display module to
any sheet metal panel to allow hands-free
operation.
f. Display module shall have NEMA 4x
housing.
g. Display shall have back light and contrast
adjustment for easy viewing in bright sunlight or night conditions.
h. Raised surface buttons with positive tactile
response.

Guide specifications (cont)
12. Compressor Suction Service Valve:
Standard refrigerant discharge isolation and
liquid valves enable service personnel to store
the refrigerant charge in the evaporator or
condenser during servicing. This factoryinstalled option allows for further isolation of
the compressor from the evaporator vessel.
13. GFI Convenience Outlet:
Shall be factory or field-installed and mounted
with easily accessible 115-v female receptacle.
Shall include 4 amp GFI receptacle.
14. 300 psig (2068 kPa) Evaporator Operating
Pressure:
This option shall provide for water-side pressure operation up to 300 psig (2068 kPa).
15. 300 psig (2068 kPa) Condenser Operating
Pressure:
This option shall provide for water-side pressure operation up to 300 psig (2068 kPa).
16. Marine Waterboxes:
Marine waterboxes shall provide water piping
connections extending from the side of the
waterbox (as opposed to extending from the
end of the waterbox). This option also includes
a removable bolt on waterbox cover allowing
access to the heat exchanger tubes without
breaking the existing field piping. This option
is available for both the evaporator and
condenser.
17. Flanged Connection:
The flanged connection option shall provide
an ANSI flange on the end of the chiller water
piping for connection to a customer supplied
mating flange in the field piping. This option
is available for both the evaporator and
condenser.
18. One-Pass Condenser:
This option shall provide a lower pressure
drop through the condenser for applications
with low delta T (temperature) or high flow or
where the condensers are piped in a series.
The one-pass condenser option is only available with flanged connections and with a discharge end leaving water connection.

Carrier Corporation • Syracuse, New York 13221

19. Dual Point Power:
The dual point power option shall provide a
means for connecting two sources of power to
dual compressor chillers. One source of power
is wired to operate the compressor on the A
circuit and one source of power is wired to
operate the compressor on the B circuit of the
chiller.
20. Non-Fused Disconnect:
This option shall provide a no load, lockable,
through the door handle disconnect for unit
power on the chiller. On dual point power,
one disconnect is provided for each of the two
main power supplies. This disconnect does
not remove the control circuit from power
supply.
21. Control Transformer:
The control transformer shall be sized to supply the needs of the control circuit from the
main power supply.
22. Nitrogen Charge:
A nitrogen charge option is available to provide a 15 lb (6.8 kg) charge of nitrogen
instead of a full factory charge of R-134a
refrigerant to keep the chiller refrigerant circuit dry during shipment. This option is recommended for applications where the unit will
be disassembled prior to installation. Units
shipped with a nitrogen charge will receive an
electrical continuity test at the factory prior to
shipment.
23. Crate for Shipment:
This option is recommended for export
orders. The chiller will be bagged prior to
being placed in a wooden crate.
24. Remote Enhanced Display:
This option is a remotely mounted indoor
40-character per line, 16-line display panel for
unit monitoring and diagnostics.
25. Vibration Springs:
A set of non-siesmic spring isolators can be
provided for installation at the jobsite.

6-09

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Pg 32
Catalog No. 04-52300015-01
Printed in U.S.A.
Form 30XW-2PD
Section 9
Replaces: 30XW-1PD
Tab
9a

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Carrier 30Xw325 400 Users Manual 30xw 2pd

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