1179 / 1904
HVAC SYSTEM-AC COMPRESSOR
74
4.0
PRECAUTIONS:-
WARNING:-
Wear eye and hand protection when
disconnecting
components
containing
refrigerant. Plug all exposed connections
immediately.
A
PRECAUTIONS
WHILE
HANDLING
REFRIGERANT LINES:-
1. Do not perform a leak test of the A/C system
with more than 20 kg / cm2 pressure as
higher pressure may result in damage to the
A/C system components.
2. Do not leave A/C joints open as moisture
tends to enter the A/C system if the joints
remain open for long time.
3. When disconnecting any hose or pipe
connection the system must be discharged of
all pressure. Proceed cautiously, regardless
of gauge readings. Open connections slowly,
keeping hands and face well away, so that no
injury occurs if there is liquid in the line. If
pressure is noticed, allow it to bleed off
slowly.
4. Lines, flexible end connections and
components must be capped immediately
they are opened to prevent the entrance of
moisture and dirt.
5. Any dirt or grease on fittings must be wiped
off with a clean alcohol dampened cloth. Do
not use chlorinated solvents such as
trichloroethylene. If dirt, grease or moisture
cannot be removed from inside the hoses,
they must be replaced with new hoses.
6. All replacement components and flexible end
connections must be sealed, and only opened
immediately prior to making the connection.
7. Ensure the components are at room
temperature before uncapping, to prevent
condensation of moisture from the air that
enters.
8. Components must not remain uncapped for
longer than 15 minutes. In the event of delay,
the caps must be fitted.
9. Receiver/driers must never be left uncapped
as they contain Silica Gel crystals which will
absorb moisture from the atmosphere.
10. The compressor shaft must not be rotated
until the system is entirely assembled and
contains a charge of refrigerant.
11. A new compressor contains an initial charge
of refrigerant oil. The compressor also
contains a holding charge of gas when
received which should be retained by leaving
the seals in place until the pipes are
reconnected.
12. All precautions must be taken to prevent
damage to fittings and connections. Slight
damage could cause a leak with the high
pressures used in the system.
13. Always use two wrenches of the correct size,
one on each fitting when releasing and
tightening refrigeration unions.
14. Joints and ’O’ rings should be coated with
refrigeration oil to aid correct seating. Fittings
which are not lubricated with refrigerant oil are
almost certain to leak.
15. Completed assemblies must be checked for
refrigeration lines touching metal panels. Any
direct contact of lines and panels transmits
noise and must be eliminated.
16. All lines must be free of kinks. The efficiency
of the system is reduced by a single kink or
restriction.
B PRECAUTIONS WHILE WORKING ON AC
WIRINGS:-
1. Disconnect battery negative terminal to
prevent any short circuits.
2. Use a vinyl tape or original clamps to connect
air conditioning wire harness to main wiring
harness.
3. If original harness is disconnected or removed
for any repair or diagnosis purpose, return it to
a proper position also during their installation
be careful not to pinch original clamps and AC
wire harness.
4. When adding lead wires to wiring harness by
soldering, use those lead wires which have
the same diameter with that of original one
and insulate each connections with tape.
5. Keep wiring harness away from the
components moving or subjected to high
temperature.
6. Avoid any sharp edge contact with wire
harness.
7. Retightening of pipe connections must be
done using two wrenches to avoid twisting of
the tubing.
8. Connect wire connections securely.