American Standard CH530 - Manual (Page 57)

57 CDHF-SVU01C-EN
Control System
Components
TRMM TRM4 (Tracer Comm 4 interface)
1A14 Optional
TRM4 Tracer Communications J2-1 COMM+, J2-2 COMM -J2-3,
Communication or COMM +J2-4, COMM -,
Interface Module LCI-C
CDRP (Condenser Refrigerant Pressure Output)
1A15 Optional Dual Analog
CDRP Signal #2 Condenser Refrigerant J2-4 Output #2, J2-6 Ground
Input/output Module Pressure output
EPRO (Enhanced Protection)
4R22
EPRO Condenser Refrigerant Pressure Transducer
4R16 EPRO Compressor Discharge Refrigerant Temperature Sensor. (This is also included with HGBP).
4R1 EPRO Inboard Bearing Temperature Sensor
4R2 EPRO Outboard Bearing Temperature Sensor