Carrier 17/19EX - Manual (Page 251)

Check Pressure Transducers
Once a year, the pressure transducers should be checked against a pressure gage reading.
Check all three transducers: oil pressure, condenser pressure, cooler pressure.
Note the evaporator and condenser pressure readings on the Status01 screen on the LID.
Attach an accurate set of refrigeration gages to the cooler and condenser Schrader fittings.
Compare the two readings. If there is a difference in readings, the transducer can be calibrated,
as described in the Troubleshooting Guide section.
Pumpout System Maintenance
For compressor maintenance details, refer to the 06D, 07D Installation, Start-Up, and
Service Instructions.
Optional Pumpout Compressor Oil Charge
Use oil conforming to Carrier specifications for reciprocating compressor usage. Oil
requirements are as follows:
• HFC-134a
ISO Viscosity ................................68
Carrier Part Number ..................PP23BZ103
The total oil charge, 4.5 pints (2.6 L), consists of 3.5 pints (2.0 L) for the compressor and one
additional pint (0.6 L) for the oil separator.