Oil Specification
If oil is to be added, it must m eet the following Carrier sp ec if ications:
Oil type for HCFC-22 Machines only... Alkyl-benzene-based synthetic compressor oil
specifically forma tted for use in HCFC-22 gea r - dr iv e n machines
ISO Viscosity Grade..................................................................................................86
Oil Type for units usin g R- 13 4a............Inh ibited polyoleste r - bas e d synthetic compres-
sor oil formatted for use with HFC, gear-driven, hermetic compressors.
ISO Viscosity Grade..................................................................................................68
The alkyl-benzene type oil (part number PP23BZ10 1) or the polyolester - bas e d oil (P/N:
PP23BZ103) may be ordered from your local Carrier representative.
Oil Changes
Carrier recommends chan ging the oil after the fir s t year of operation and every t hree years
thereafter as a minimum in addition to a yearly oil an alysis. However, if a cont inuous oil
monitoring system is functioning and a yearly oil analysis is performed, time between oil changes
can be extende d.

To Change the Oil

1. Transfer the refrig erant into the condenser ( f or isolatable vessel s) or a storage tank.
2. Mark the existing oi l lev e l.
3. Open the cont rol and oil heat er circuit b reaker.