Trane GSSD specifications General Information

General Information

The GSSD split unit has been ARI rat- ed with the Trane TWE air handlers with ICM 2 variable speed motors to create a complete split system for res- idential applications. The GSSD equipment is completely assembled, piped, internally wired and test operat- ed in the factory. The GSSD equip- ment is ETL and CSA listed.

A prewired terminal strip is provided for field control wiring.

The system water inlet and outlet con- nections are female 1-inch National Pipe Thread (NPT) swivel quick con- nectors 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 indicat- ing caution areas.

Safety

The GSSD was designed with protec- tion of unit components in mind. High and low pressure cutouts are included to prolong the life of the compressor.

A35 degrees F freezestat for non-anti- freeze applications or 20 degrees F freezestat for closed loop with anti- freeze is included to protect against fluid freezing in the unit’s water heat exchanger. All safety devices with ex- ception of compressor internal over- load 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 dis- connect 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 galva- nized 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 cab- inet is removable for access to all of the internal components by removing only two screws. All panels are insu- lated with 1/2-inch thick, neoprene backed, acoustical fiberglass insula- tion

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 pro- vided at virtually no cost to the user during the cooling operation and effi- ciently 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 con- nections. The desuperheater has two temperature control sensors that mon- itor 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 com- pressor discharge line reaches 145 de- grees F. The desuperheater pump will automatically shut off if the tempera- ture 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 thermo- stats 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 Heat- Off-Cool system switch, Auto/On fan switch, and a Normal- Auxiliary-Emergency Heat switch. The Normal-Auxiliary-Emergency Heat switch thermostat is suitable when an electric backup heater is used in conjunction with a water- to-air heat pump.

4