Trane CGAM User Manual

154 CG-SVX17D-EN
Unit Shutdown
Seasonal Unit Shutdown
1. Perform the normal unit stop sequence using the <Stop> key.
Note: Do not open the starter disconnect switch. It must remain closed to provide power to the
compressor oil sump heaters.
2. Verify that the chilled water and pumps are cycled off. If desired, open the disconnect switches
to the pumps.
3. Verify that the compressor oil sump heaters are installed tightly around the compressor.
Energize and verify heaters are operational using a temperature probe. See Ta b le 62, p. 154.
4. Verify that the freeze protection heaters are operational. See Tab le 63, p. 154. Install jumper
across thermostat and verify current flow. See section “Unit Wiring,” p. 183 for component
locations.
NOTICE:
Equipment Damage!
If the chiller evaporator or evaporator water piping is drained of water, the evaporator
immersion heater must be de-energized. Failure to de-energize the heater will cause it to burn
out.
Note: See “Freeze Protection,” p. 58 for more information on freeze protection requirements.
5. Once the unit is secured, perform the maintenance identified in the following sections.
Table 62. Compressor oil sump heater summary
(a)
(a) Not all heaters are present on all unit configurations. See schematics and component locations in
section“Unit Wiring,” p. 183.
Heater Group Heater Description
Heater
Designation(s)
Compressor Oil Sump
Compr 1A, Ckt 1 3M1E1
Compr 1B, Ckt 1 3M2E1
Compr 1C, Ckt 1 3M3E1
Compr 2A, Ckt 2 4M1E1
Compr 2B, Ckt 2 4M2E1
Compr 2C, Ckt 2 4M3E1
Table 63. Freeze protection heater summary
(a)
Heater Group
Thermostat
Designation Jumper Terminals Heater Description
Heater
Designation(s)
Evaporator and Water
Pipe Heaters
5S1 5X1-2 to 5X1-3
Evaporator 5E1
Evap Entering Water Piping 5E4, 5E18
Evap Leaving Water Piping 5E5, 5E19
Water Pump Piping 5E6, 5E14
Partial Heat Recovery
(optional)
5E10, 5E11,
5E16, 5E17
Expansion Tank (included in
pump package option)
5E7
Pump Package (optional) 5S2 5X2-1 to 5X2-2 Water Pump Piping 5E13, 5E15
Buffer Tank (optional) 5S3 Across thermostat Buffer Tank
5E2, 5E8,
5E12, 5E13
(a) Not all heaters are present on all unit configurations. See schematics and component locations in section“Unit Wiring,” p. 183.

Trane CGAM Specifications

General

Brand	Trane
Model	CGAM
Category	Chiller
Language	English