Carrier 19XL - Manual (Page 208)

Oil Specification
If oil is to be added, it must meet the following Carrier specifications:
• Oil type for HCFC-22 Machines only... Alkyl-benzene-based synthetic compressor oil
specifically formatted for use in HCFC-22 gear-driven machines
ISO Viscosity Grade ..................................................................................................86
• Oil Type for units using R-134a............Inhibited polyolester-based synthetic compres-
sor oil formatted for use with HFC, gear-driven, hermetic compressors.
ISO Viscosity Grade ..................................................................................................68
The alkyl-benzene type oil (part number PP23BZ101) or the polyolester-based oil (P/N:
PP23BZ103) may be ordered from your local Carrier representative.
Oil Changes
Carrier recommends changing the oil after the first year of operation and every three years
thereafter as a minimum in addition to a yearly oil analysis. However, if a continuous oil
monitoring system is functioning and a yearly oil analysis is performed, time between oil changes
can be extended.
To Change the Oil
1. Transfer the refrigerant into the condenser (for isolatable vessels) or a storage tank.
2. Mark the existing oil level.
3. Open the control and oil heater circuit breaker.