Repair Service Manual

REPAIR MANUAL
8
AIR CONDITIONING
Warning !
When working on air conditioning systems containing refrigerant and requires emptying or
opening the circuit, the emptying or opening of the system, it is mandatory that the engineer is
qualified and holds the relevant license and that the business premises has also achieved a
"Certificate of compliance".
It is prohibited to discharge refrigerant into the atmosphere.
HOW TO OPERATE THE AIR CONDITIONING:
CHARACTERISTICS:
Type of Gas: R134A
Gas Qty.: 400g
Oil type: ZXL 200 PG
Oil Qty.:
Compressor coil resistance: 3.5 Ω
Compressor belt tension:
MAINTENANCE:
Every 2 years check the charge of the gas.
Every 4 years replace the Filter/Drier
Main factors of risks:
The loss of gas:
The system is supposed to be tight, but to limit the risk of loss of air conditioning gas must rotate at
least every 15 days (especially in winter, at least for 1/4 hours) to improve the flow of oil ( pending with
the fluid) to lubricate the joints.
The water problem:
PAG oils are very hygroscopic, i.e. they have a strong tendency to absorb moisture from the air. The
drier the moisture but retains its capacity is limited: 3 grams of water max. The circuit is supposed to
be sealed and pressurized water can come from an insufficient degree of vacuum before the
refrigerant charge
a/ Fan speed controler
b/ A/C commutator
c/ Air recirculation speed