Trane Foundation GCC 090-150 - Compressor Start-Up Procedures

26
RT-SVX069D-EN
High Pressure Cutout and Temperature
Discharge Limit
The high pressure controls and temperature discharge limit
are wired in series between the compressor outputs on the
LTB and the compressor contactors. If the high pressure
safety or temperature discharge limit opens, the
compressor on the affected circuit is turned off.
Heating Operation
Standard unit operation for heating will continue on units
equipped with a two-speed indoor fan. During heat mode,
all units configured with staged electric or gas heat will heat
the supply air and space as normal utilizing full speed
indoor fan.
Emergency Stop
This input de-energizes the 24 Vac output from the phase
monitor and can be activated by opening a field supplied
device.
Compressor Start-Up
1. Attach a set of service gauges onto the suction and
discharge gauge ports for each circuit.
See, “Cooling Operation,” p. 25 for startup instructions.
Scroll Compressors
a. Once each compressor has started, verify that the
rotation is correct. If wired correctly the suction
pressure should drop and the discharge pressure
should rise. If a scroll compressor is rotating
backwards, it will not pump and a loud rattling
sound can be observed.
b. Once each compressor has started, verify that the
rotation is correct. If wired correctly the suction
pressure should drop and the discharge pressure
should rise. If a scroll compressor is rotating
backwards, it will not pump and a loud rattling
sound can be observed.
Figure 15. Compressor terminal box
Compressor ZP**
3
2
1
Compressor ABG/M0**
3
2
1
IP22
1. Spade connectors 1/4–in.
2. Earth connection
3. Power cable passage
T1
T2T3
Table 9. Compressor types
Tonnage
208/230V 460V
Compres-
sor 1
Compres-
sor 2
Compres-
sor 1
Compres-
sor 2
E/GC*090 ABG042R ZP31-TF5 ABG042W ZP31-TFD
E/GC*102 ABM051R ABG42R ABM051W ZP31-TFD
E/GC*120 ABM051R ZP51-TF5 ABM051W ZP51-TFD
E/GC*150 ZP72-TF5 ABM051R ZP72-TFD ABM051W
Table 10. POE Oil recharge amount (fl. oz.)
Tonnage
208/230V 460V
Compres-
sor 1
Compres-
sor 2
Compres-
sor 1
Compres-
sor 2
E/GC*090 43 25 43 25
E/GC*102 43 43 43 43
E/GC*120 43 42 43 42
E/GC*150 60 43 60 43
2. After the compressor and condenser fan have started
and operated for approximately 30 minutes, observe
the operating pressures. Compare the operating
pressures to the operating pressure curve..
3. Check system subcooling.
4. Repeat Step 1 through Step 3 for each refrigerant
circuit.
Start Up