73 of 114M-AP-001-EN Rev. Q
Figure 14-9 TTH/TGH Piping Schematic with Required Economizer (Closed Type) and Vapor Line Solenoid
NOTE
Failure to include a solenoid valve in the compressor VAPOR line, wired to close immediately when the compressor shuts down,
could result in serious damage to the compressor.
NOTE
All TGH/TTH compressors MUST include an economizer (flash or plate style). If an economizer is not provided, significant
instability should be expected and the operating range of the compressor will be limited.
MotorCooling
Port
Suction
Port
Economizer
Port
DischargePort
*
Sight
Glass
Filter/
Drier
Evaporator
*
Sight
Glass
*
Expansion
Valve
Condenserwith
Subcooler
S
Solenoid
Valve
Expansion
Valve
Check
Valve
Staging
Valve
NOTE
*Service valves are optional.