Trane GSWD, WPWD, EXWA User Manual
Installation
Owner
Diagnostics
Water-to-Water
Water-Source Heat Pump
Models WPWD, GSWD and EXWA
Models
WPWD
024-072 – 60 HZ
GSWD
024-072 – 60 HZ
“A” and later Design Sequence
EXWA
240 – 60 HZ
WSHP-SVX02A-EN
Notice
Warnings and Cautions appear at appropriate sections throughout this manual.
Read these carefully.
NOTICE:
WARNING -Indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury.
CAUTION -Indicates a potentially hazardous situation which, if
not
avoided, may result in minor or moderate injury. It
may also be used to alert against unsafe practices.
CAUTION -Indicates a situation that may result in equipment or
property-damage-only accidents.
Important!
Equipment is shipped FOB (Free on
Board) at the manufacturer. Therefore,
freight claims for damages against the
carrier must be initiated by the receiver.
NOTICE:
Unit contains HCFC (R-22) Refrigerant
Instructions!
Section 608, Paragraph C of the 1990 Clean Air Act states:
Effective July 1, 1992, it shall be unlawful for any person, in course of
maintaining, servicing, repairing, or disposing of an air conditioning system, to
knowingly vent or release any CFC or HCFC refrigerant. Minimal releases (air
purges or refrigerant hoses) associated with good faith attempts to recapture or
recycle are exempt from the ban on venting.
Responsible Refrigerant Practices!
Trane believes that responsible refrigerant practices are important to the
environment, our customers, and the air conditioning industry. All technicians
who handle refrigerants must be certified. The Federal Clean Air Act (Section 608)
sets forth the requirements for handling, reclaiming, recovering and recycling of
certain refrigerants and the equipment that is used in these service procedures.
In addition, some states or municipalities may have additional requirements that
must also be adhered to for responsible management of refrigerants. Know the
applicable laws and follow them.
© 2002 American Standard Inc. WSHP-SVX02A-EN
Contents
Installation/Startup/Commissioning
Pre-installation Checklist
General Information
Dimensions/Weights
Installation Instructions
Electrical Requirements
Pre-Startup Checklist
Startup/Commissioning
Sequence of Operation
Operating Pressures
Startup Checklist & Log
Maintenance
4
4
5
6
10
19
20
21
21
22
30
24
25
Warranty Information
Troubleshooting Checklist
Unit Wiring
WSHP-SVX02A-EN 3
26
28
29
Pre-installation
Checklist
WARNING
Fiberglass Wool!
Product contains fiberglass wool. Disturbing the insulation in this
product during installation, maintenance or repair will expose you to
airborne particles of glass wool fibers and ceramic fibers known to the
state of California to cause cancer through inhalation. Glass wool fibers
may also cause respiratory, skin or eye irritation.
Jobsite Inspection
Always perform the following checks before accepting a unit:
1. Verify that the nameplate data matches the data on the sales order and bill of
lading (including electrical data).
2. Verify that the power supply complies with the unit nameplate specifications.
3. Visually inspect the exterior of the unit, for signs of shipping damage. Do not
sign the bill of lading accepting the unit(s) until inspection has been completed. Check for damage promptly after the unit(s) are unloaded. Once the
bill of lading is signed at the jobsite, the unit(s) are now the property of the
SOLD TO party and future freight claims MAY NOT be accepted by the
freight company.
4. Verify that the refrigerant charge has been retained during shipment by use
of gauges. Schrader taps are located external to the cabinet on the 2-ton
through 6-ton equipment.
5. After assuring that charge has been retained, reinstall the schrader caps to
assure that refrigerant leakage does not occur.
WARNING
Microbial Growth!
Wet interior unit insulation can become an amplification site for
microbial growth (mold), which may cause odors and damage to the
equipment and building materials. If there is evidence of microbial
growth (mold) on the interior insulation, the insulation should be
removed and replaced prior to operating the system.
Jobsite Storage
This unit is intended for indoor use only. To protect the unit from damage due to
the elements, and to prevent possible IAQ contaminant sources from growing,
the unit should be stored indoors. If indoor storage is not possible, the following
provisions for outdoor storage must be met:
1. Place the unit(s) on a dry surface or raise above the ground to assure adequate air circulation beneath the unit.
2. Cover the unit(s) with a water proof tarp to protect them from the elements.
3. Make provisions for continuous venting of the covered units to prevent
moisture from standing on the unit(s) surfaces. Wet interior unit insulation
can become an amplification site for microbial growth (mold) which has
been determined to be a cause of odors and serious health related indoor air
quality problems.
4. Store units in the normal UP orientation to maintain oil in the compressor.
5. Do not stack more than three units in total height for the WPWD/GSWD 2-ton
through 6-ton configurations, and no more than two units high for the EXWA
20-ton configuration.
4 WSHP-SVX02A-EN
General
Information
Unit Nameplate
The unit nameplate is located at the
front of the unit. It includes the unit
model number, serial number, electrical characteristics, refrigerant charge,
and other pertinent unit data.
Compressor Nameplate
The nameplate for the compressors
are located on the compressor shell.
Unit Description
Before shipment, each unit is leak tested, dehydrated, charged with refrigerant and run tested for proper control
operation.
Water-to-Refrigerant Coils
The brazed-plate water-to-refrigerant
heat exchangers for the 2-ton through
6-ton equipment are constructed of
stainless steel.
The water-to-refrigerant heat exchangers for the 20-ton equipment are
an inner copper tube or cupro-nickel
(option available on the source-side
only) and steel tube (tube-within-atube) design.
Both heat exchanger types are leak
tested to assure there is no cross leakage between the water and refrigerant
gas.
Water Connections
One inch brass swivel connections are
provided for the 2-ton through 6-ton
equipment. Each brass fitting has a
one inch gasket for the connector. The
gaskets are shipped in the electrical
compartment to prevent loss at the job
site.
Water connections for the 20-ton are
located inside the unit at the units
front (source-side) and back (loadside). The fitting consist of a 2-inch female pipe threaded connection.
Controls
The control system offered to control
the unit is a Basic 24 volt control for
the 2-ton through 6-ton unit sizes, and
a deluxe 24 volt micro processing
board for the 20-ton unit.
All power wiring to the equipment is
made at the unit contactor for the 2-
ton through 6-ton equipment, and at
the power block for the 20-ton equipment.
All low voltage wiring is made at the
unit’s low voltage terminal board.
Wiring Connections
Troubleshooting and connection diagrams for the equipment may be located in the back of this manual.
Basic 24V Controls
(for 2-ton through 6-ton units)
Safety devices for equipment containing the basic 24V control option include a low pressure switch and a
freezestat to prevent compressor operation during low temperature activity. The switch is set to activate at
refrigerant pressures of 35 psig or 7
psig to fit most applications.
A high pressure switch prevents compressor operation during high or excessive discharge pressures
exceeding 395 psig.
The lockout relay communicates the
low or high pressure situation to the
compressor to prevent operation. The
relay may be reset at the thermostat,
or by cycling power to the unit.
General alarm may be accomplished
through the lockout relay to drive light
emitting diodes (LEDs) on a field supplied status indicating thermostat. Terminal 6 on the lockout relay is open for
field use in malfunction indications.
This feature will drive dry contacts
only, and cannot be used to drive field
installed control inputs.
Deluxe 24V Controls
(for 20-ton unit)
Units containing the Deluxe 24V control design will incorporate a microprocessor-based control board. The
Trane microprocessor board is factory
wired to a terminal strip to provide all
necessary terminals for field connection. The deluxe board is equipped
with a random start relay, anti-short
cycle timer, brown out protection,
compressor disable, unit safety control, diagnostics and a generic relay
(which may be available for field use).
See page 17 for diagnostic information.
Desuperheater
(Option for 2-ton through 6-ton units)
For units containing the desuperheater option, the unit is shipped from the
factory with a desuperheater water
coil and pump mounted internal to the
unit cabinetry. For domestic hot water
hook-up instructions, see manual
WSHPC-IN-4 or 72-9006-02.
The desuperheater pump fuse is located in the control box within a container. The fuse is not factory installed to
avoid possible pump damage at initial
start-up. If the fuse in installed and the
unit is started without water in the system, the pump will be damaged. See
page 17 for fuse installation.
Schrader Connections
Connections for the low and high side
of the refrigeration system are located
conveniently on the unit’s right side
for the 2-ton through 6-ton units, and
behind the front, refrigeration access
panel for the 20-ton unit.
WSHP-SVX02A-EN 5
Table 1: Unit weights
Size
024 163 153
036 183 173
042 203 193
048 214 204
060 244 234
072 277 267
240 1222 1156
Shipping
Weight
with pallet (lb)
w/o pallet (lb)
Shipping
Weight
Dimensions/Weights/
Clearance
WARNING
Improper Unit Lift!
Test lift unit approximately 24 inches to verify proper
center of gravity lift point. To avoid dropping of unit,
reposition lifting point if unit is not level. Failure to
properly lift unit could result in death or serious injury
or possible equipment or property-only damage.
Unit Location and Clearances
Locate the unit in an indoor area. The
ambient temperature surrounding the
unit must not be less than 45°F. Do
not locate the unit in areas subject to
freezing.
Attention should be given to service
clearance and technician safety. The
unit access panels may be easily removed. There must be enough space
for service personnel to perform maintenance or repair. Provide sufficient
room to make water, and electrical
connection(s). Local and national
codes should be followed in providing
electrical power connections. See Fig-
ure 1 for mechanical clearances.
Figure 1: Mechanical clearances
6 WSHP-SVX02A-EN
Dimensions
WPWD/GSWD 024-036
WSHP-SVX02A-EN 7
Dimensions
WPWD/GSWD 042-072
8 WSHP-SVX02A-EN
Dimensions
EXWA 240
WSHP-SVX02A-EN 9
Installation
General Installation Checks
The checklist below is a summary of
the steps required to successfully install a unit. This checklist is intended to
acquaint the installing personnel with
procedures required in the installation
process. It does not replace the detailed instructions called out in the applicable sections of this manual.
1 Remove packaging and inspect the
unit. Check the unit for shipping
damage and material shortage; file
a freight claim and notify appropriate sales representation.
Note: The units have been tied to
the skid by (4) angle brackets. Remove these brackets from the unit
to slide unit from skid.
2 Verify the correct model, options
and voltage from the unit nameplate.
3 Verify the installation location of
the unit will provide the required
clearance for proper operation.
4 Remove refrigeration access panel
and inspect the unit. Be certain the
refrigerant tubing has clearance
from adjacent parts.
WARNING
Hazardous
Voltage!
Disconnect all electric power,
including remote disconnects
before servicing. Follow proper
lockout/tagout procedures to
ensure the power can not be
inadvertently energized. Failure to
disconnect power before
servicing could result in death or
serious injury.
Main Electrical
5 Verify the power supply complies
with the unit nameplate specifications.
6 Inspect all control panel compo-
nents; tighten any loose connections.
7 Connect properly sized and pro-
tected power supply wiring to a
field-supplied/installed disconnect
switch and to the main power terminal block (1TB1) in the unit control box for the 20-ton equipment,
or (1K1) for the 2-ton through 6ton equipment.
8 Install proper grounding wires to
an earth ground.
Note: All field-installed wiring must
comply with NEC and applicable local
codes.
Low Voltage Wiring (AC & DC)
Requirements
9 Connect properly sized control wir-
ing to the proper termination
points between the field supplied
thermostat and the terminal strip
located in the equipment control
box.
10 WSHP-SVX02A-EN
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