A/C Service Tips And Precautions - Honda Acura NSX 1991 Service Manual

A/C Service Tips and Precautions

1 . Always disconnect the negative cable from the battery whenever replacing air conditioner parts.
2. Keep moisture and dust out of the system. When disconnecting any lines, plug or cap the fittings immediately; don't
remove the caps or plugs until just before you reconnect each line.
3. Before connecting any hose or line, apply a few drops of refrigerant oil to the O-ring.
4. When tightening or loosening a fitting, use a second wrench to support the matching fitting.
5. When discharging the system, use a refrigerant recovery system; don't release refrigerant into the atmosphare.
6. And refrigerant oil after replacing the following parts:
Condenser . . . . . . . . . . . . . . . . . . . . . . . .
Evaporator . . . . . . . . . . . . . . . . . . . . . . . .
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 cc (l/3 fl 02)
Compressor.. . . . . . . . . . . . . . . . . . . . . On compressor replacement, subtract the volume of oil drained from the removed com-
Don't overtighten fittings; you could damage them. Leaks are caused by faulty O-rings, overtightening won't stop them.
to AK lines . . . . . . . . . . . . . . .._..... 22 N'm (2.2 kg-m, 16 lb-ft)
(both side) . . . .._.................
(both side) . . . . . . . . . . . . . . . . . . . . . . .
Condenser line C to left side
condenser . . . . . . . . . . . . . . . . . . . . . . . .
Receiver-dryer . . . . . . . . . . . . . . . . . . 14 N-m (1.4 kg-m, 10 lb-ft)
When handling refrigerant (R-12):
l Do not let refrigerant get on your skin or in your eyes. If it does:
Keep refrigerant containers (cans of R-12) stored below 40°C (100°F).
l
Do not handle or discharge refrigerant in an enclosed area near an open flame; it may ignite and produce a poisonous
l
gas.
l The ozone is fragile layer surrounding the earth which acts as a shield against the sun's ultraviolet radiation. Chlo-
rine from chemicals called chlorofluorocarbons (CFCs)
ditioning systems currently use chlorofluorocarbons as the refrigerant. Auto air conditioning service equipment
has been developed to minimize the release of CFCs to the atmosphere. All service procedures should be per-
formed using this equipment and the manufactuer's instructions.
10 cc (l/3 fl oz)
pressor from 80 cc (2 2/3 fl 02). and drain the calculated volume of oil from the new
compressor: 80 cc (2 2/3 fl OZ)-Volume of oil from removed compressor=Volume
to drain from new compressor.
23 N*m (2.3 kg-m, 17 lb-ft)
23 N*m (2.3 kg-m, 17 lb-ft)
14 N-m (1.4 kg-m, 10 lb-ft)
Receiver line and suction line to heater
assembly . . . . . . . . . . . . . . . . . . . . . . . . .
bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
bolts . . . ..a......................... 25 N-m (2.5 kg-m, 18 lb-ft)
mounting bolts . . . . . . . . . . . . . . . . . 50 N-m (4.5 kg-m, 36 lb-ft)
Idler pulley center nut . . . . 45 N.m (4.5 kg-m, 32.5 lb-ft)
destroy the ozone in the stratosphere. Automotive air con-
22 N-m (2.2 kg-m, 16 lb-ft)
22 N-m (2.2 kg-m, 16 lb-ft)
22-65