Trane Foundation EDK090 - High Pressure Cutout and Temperature; Discharge Limit; Heating Operation; Emergency Stop

RT-SVX096A-EN
37
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 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. 36 for start-up 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 16. Compressor terminal box
Compressor YBH/M0**
3
3
3
1
1
1
2
2
2
IP22
T1
T2T3
Compressor HRH**
Compressor HLJ**
1 – Spade connectors 1/4–in.
2 – Earth connection
3 – Power cable passage
Table 11. Compressor types
Tonnage
208/230V 460V
Compressor 1 Compressor 2 Compressor 1 Compressor 2
E/GD*090 YBH042R YBH031R YBH042W YBH031W
E/GD*102 YBM051R YBH042R YBM051W YBH042W
E/GD*120 YBM051R HRH051U2 HBM051W HRH051U4
E/GD*150 HLJ072U2 YBM051R HLJ072U4 YBM051W
Table 12. POE Oil recharge amount (fl. oz.)
Tonnage
208/230V 460V
Compressor 1 Compressor 2 Compressor 1 Compressor 2
E/GD*090 43.3 25.0 43.3 25.0
E/GD*102 43.3 43.3 43.3 43.3
Start-Up