Trane GSSD User Manual
Water Source Heat
Pump Residential
Split Configuration
HVAC System
Installation
Operation &
WSHPC-IOM-2
72-9041-02
Maintenance
Library Service Literature
Product Section Unitary
Product Water Source Heat Pump
Model GSSD
Literature Type Installation, Operation and Maintenance
Sequence 2
Date June 1999
File No. SL-UN-WSHP-GSSD-IOM-2-6-99
Supersedes WSHPC-IOM-2 / 72-9041-01 (Jan 98)
©An American Standard Company
Since American Standard Inc. has a policy of continuous product improvement, it reserves the right to change specifications
and design without notice. The installation and servicing of the equipment referred in this booklet should be done by qualified,
experienced technicians.
Table of Contents
Model Number
Descriptions.....................
General
Information......................
Receiving and
Handling..........................
Installation
Drawings.........................
Installation (Water
Connections)....................
Installation
(Electrical).................
Diagram.................... 14
3 Installation (Water Loop).. 15
4 Refrigeration Charge........ 16
6 Refrigeration System....... 17
7 Accessories................... 18
10
11
Notice
The Trane Company urges that all HVAC servicemen working on Trane equipment, or any manufacturer’s products, make
every effort to eliminate, if possible, or vigorously reduce the emission of CFC, HCFC, and HFC refrigerants to the atmosphere resulting from installation, operation, routine maintenance, or major service on this equipment. Always act in a responsible manner to conserve refrigerants for continued use even when acceptable alternatives are available.
Refrigerant used in any type of air-conditioning or refrigerating equipment should be covered for reuse, recovered and/or
recycled for reuse, reprocessed (reclaimed), or properly destroyed, whenever it is removed from the equipment. Never release to the atmosphere.
Take extra care to properly maintain all service equipment directly supporting refrigerant service work such as gauges, hoses, vacuum pumps, and recycling equipment. Stay aware of unit enhancements, conversion refrigerants, compatible parts
and manufacturer’s recommendations which will reduce refrigerant emissions and increase equipment operating efficiencies. Follow specific manufacturer’s guidelines for conversion of existing systems.
2
Model Number Description
DIGITS 1 & 2 - PRODUCT TYPE
GS = Ground Source Heat Pump
DIGIT 3 - PRODUCT CONFIGURATION
S = Split System
DIGIT 4 - DEVELOPMENT SEQUENCE D
DIGITS 5,6 & 7 - UNIT NOMINAL
CAPACITY (MBH)
024 = 24.1
030 = 29.6
036 = 36.4
042 = 41.1
048 = 48.7
060 = 59.2
072 = 65.6
GS S D 036 1 0 C 0 0 1 2 0 T
5
DIGIT 14 - FREEZE PROTECTION
1 = 35 Degree Freezestat
2 = 20 Degree Freezestat
DIGIT 15 - OPEN
0 = Open
DIGIT 16 - BRAND
C = Command Aire
T = Trane
10
15
DIGIT 8 - VOLTAGE/HERTZ/
PHASE
1 = 208/230-60-1
DIGIT 9 - UNIT ARRANGEMENT
0 = Split Condensing Unit
DIGIT 10 - DESIGN SEQUENCE C
DIGIT 11 - OPEN DIGIT
0 = Open Digit
DIGIT 12 - OPEN DIGIT
0 = Open Digit
DIGIT 13 - DESUPERHEATER
0 = No Desuperheater
1 = With Desuperheater
3
General Information
The GSSD split unit has been ARI rated with the Trane TWE air handlers
with ICM 2 variable speed motors to
create a complete split system for residential applications. The GSSD
equipment is completely assembled,
piped, internally wired and test operated in the factory. The GSSD equipment is ETL and CSA listed.
A prewired terminal strip is provided
for field control wiring.
The system water inlet and outlet connections are female 1-inch National
Pipe Thread (NPT) swivel quick connectors with stainless steel stop ring to
simplify field installation.
The GSSD units are shipped with a
pressurized dry nitrogen holding
charge to ensure clean components.
All equipment has easy to read decals
and labels to aid in service of unit,
identifying port locations and indicating caution areas.
Safety
The GSSD was designed with protection of unit components in mind. High
and low pressure cutouts are included
to prolong the life of the compressor.
A 35 degrees F freezestat for non-antifreeze applications or 20 degrees F
freezestat for closed loop with antifreeze is included to protect against
fluid freezing in the unit’s water heat
exchanger. All safety devices with exception of compressor internal overload are connected to a lockout relay
to turn off the compressor, the loop
pumps and the desuperheater pump if
a problem is incurred.
Note:
The lockout relay may be reset by
cycling power to the unit at the disconnect or thermostat system switch.
Brass Loop Water
Connections
Two 1-inch brass swivel connectors
on the units help eliminate the need for
a backup wrench when tightening the
loop water connections.
Gaskets for the brass connections can
be found inside a cloth bag located in
the electrical compartment.
Cabinet
The cabinet is constructed of galvanized heavy gauge steel. The finish is
applied by an electrostatic powder
spray system in the color of crushed
ice.
The top, front half of the diagonal cabinet is removable for access to all of
the internal components by removing
only two screws. All panels are insulated with 1/2-inch thick, neoprene
backed, acoustical fiberglass insulation
Desuperheater
(Optional)
The double wall vented desuperheater
uses heat off of the discharge line of
the compressor to preheat a home’s
domestic hot water. Hot water is provided at virtually no cost to the user
during the cooling operation and efficiently during the heating operation by
reducing the amount of time the hot
water heater runs.
The desuperheater’s stainless steel,
voluted, circulator pump is built into
the unit. The connections are 1/2-inch
NPT female water inlet and outlet connections. The desuperheater has two
temperature control sensors that monitor the temperature of the discharge
line of the compressor and the temper-
ature-out of the hot water heater. The
desuperheater is disable until the compressor discharge line reaches 145 degrees F. The desuperheater pump will
automatically shut off if the temperature of the incoming water exceeds
125 degrees F to prevent excessive
water temperatures and pump damage.
Trane provides a twist lock fuse for the
desuperheater. The fuse is shipped
loose to ensure pump integrity. The
pump is water cooled and should be
connected to the water heater prior to
its running.
The fuse is located in a cloth bag in the
electric box. (See Page 12, Figure 6
for fuse location).
Thermostats
The following wall mounted thermostats may be used in conjuction with
these units:
! Single-stage manual changeover
with Heat-Off-Cool system switch
and On-Off fan switch. This
thermostat is suitable if there is no
electric backup heater used with a
water-to-air heat pump.
! A single stage cool/two stage heat
manual changeover with HeatOff-Cool system switch, Auto/On
fan switch, and a NormalAuxiliary-Emergency Heat switch.
The Normal-Auxiliary-Emergency
Heat switch thermostat is suitable
when an electric backup heater is
used in conjunction with a waterto-air heat pump.
4
General Information
Warranty
The unit is warranted by the manufacturer against any defects in material
and factory workmanship for one year
after installation (labor and parts).
The refrigerant circuit, including the
compressor, expansion device, reversing valve (less solenoid coil), and all
heat exchangers in contact with refrigerants are warranted for an additional
four years (parts only).
Optional extended warranties are
available through the local distributor.
Note:
If any safety device is bypassed or
removed, the warranty is voided.
5
Receiving and Handling
The GSSD is packaged in clear stretch
wrap to allow immediate visual inspection. A careful inspection should
be made for shipping damage. All or-
ders are free on board (FOB) factory, therefore claims must be made
with the delivering carrier.
Carefully remove the stretch wrap and
the top cardboard corner pieces. Also
remove the (4) four shipping brackets
from the lower corners of the unit
along with the shipping skid.
Note:
Before installing the unit:
! Verify nameplate and model
number are correct.
! Inspect the overall quality and
appearance of the unit
.
Top Cover
Corners
Figure 1: Shipment Packaging
Wooden Skid
Shipping Brackets
6
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