Trane CVGF1000, Installation, Operation & Maintenance Manual

Page: 94 / 128

CDRP Refrigerant Pressure Output Option 1A15:
Refrigerant Pressure Output can be configured at commissioning to correspond to ei-
ther A) the absolute condenser pressure, or B) the differential pressure of the evapora-
tor to condenser pressures.
This output is located at 1A15-J2-4(+) to J2-6 (ground)
The Output can source a maximum of 22 mA of current.
A) Condenser Pressure Output.
2 to 10 Vdc corresponds to 0 Psia to the HPC (in Psia) setting.
Temperature based
On standard machines the Percent Condenser Pressure Indication Output is based
on the Saturated Condenser Refrigerant and a temperature to pressure conversion is
made.
If the Condenser Saturated Temperature goes out of range due to an open or short, a
pressure sensor diagnostic will be called and the output will also go to the respective
out of range value. That is, for an out of range low on the sensor, the output will be
limited to 2.0 Vdc. For an out of range high on the sensor, the output will be limited to
10.0 Vdc.
Figure 34.
CAP
10 vdc
2 vdc
0 PSIA
0 Percent
HPC in PSIA
100 Percent
CVGF-SVX03B-EN
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Control System Components