High Pressure Cutout And Temperature; Discharge Limit; Heating Operation; Emergency Stop - Trane Foundation GCC 090-150 Installation, Operation And Maintenance Manual

Start Up

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
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.
26
for startup instructions.
Figure 15. Compressor terminal box
1
2
1
T1
T3 T2
2
3
IP22
1. Spade connectors 1/4–in.
2. Earth connection
3. Power cable passage
Table 9. Compressor types
208/230V
Tonnage
Compres- Compres-
sor 1
E/GC*090 ABG042R ZP31-TF5
E/GC*102 ABM051R
E/GC*120 ABM051R ZP51-TF5
E/GC*150 ZP72-TF5 ABM051R
Table 10. POE Oil recharge amount (fl. oz.)
208/230V
Tonnage
Compres- Compres-
sor 1
E/GC*090 43
E/GC*102 43
E/GC*120 43
E/GC*150 60
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.
Compressor ZP**
3
Compressor ABG/M0**
460V
Compres- Compres-
sor 2 sor 1 sor 2
ABG042W ZP31-TFD
ABG42R ABM051W ZP31-TFD
ABM051W ZP51-TFD
ZP72-TFD ABM051W
460V
Compres- Compres-
sor 2 sor 1 sor 2
25 43
43 43
42 43
43 60
RT-SVX069D-EN
25
43
42
43