Acura 3.5 RL Manual page 1018

Description
Outline
The air conditioner system removes heat from the passenger compartment by circulating refrigerant through the system
as shown below.
High-temperature/
high-pressure gas
Suction and compression
COMPRESSOR
Less moisturized
low-pressure vapor
EVAPORATOR
PRESSURE
REGULATOR (EPR)
VALVE
SUB CONDENSER
(Part of condenser assembly)
RECEIVER/DRYER
This vehicle uses HFC-134a (R-134a) refrigerant which does not contain chlorofluorocarbons. Pay attention to the follow-
ing service items:
Do not mix refrigerants CFC-12 (R-12) and HFC-134a (R-134a). They are not compatible.
Use only the recommended polyalkyleneglycol (PAG) refrigerant oil (ND-OIL 8) designed for the R-134a compressor.
Intermixing the recommended (PAG) refrigerant oil with any other refrigerant oil will result in compressor failure.
All A/C system parts (compressor, discharge line, suction line, evaporator, condenser, receiver/dryer, expansion valve.
O-rings for joints) have to be proper for refrigerant R-134a. Do not confuse with R-12 parts.
Use a halogen gas leak detector designed for refrigerant R-134a.
R-12 and R-134a refrigerant servicing equipment are not interchangeable. Use only a recovery/recycling/charging station
that is U.L.-listed and is certified to meet the requirements of SAE J2210 to service R-134a air conditioning systems.
Always recover the refrigerant R-134a with an approved recovery/recycling/charging station before disconnecting any
A/C fitting.
Radiation of heat
CONDENSER
Absorption of heat
EVAPORATOR
EVAPORATOR/BLOWER UNIT
LIQUID LINE
(High-side)
CONDENSER
CONDENSER LINE
High-temperature/
high-pressure liquid
More liquidified
low-pressure vapor
EVAPORATOR
PRESSURE
REGULATOR
DISCHARGE LINE (High-side)
High-temperature/
high-pressure liquid
Traps debris,
and removes
moisture
RECEIVER/DRYER
EXPANSION VALVE
SUCTION LINE (Low-side)
COMPRESSOR
SUB
CONDENSER