Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1657
1-14 HEATING AND AIR CONDITIONING
•
Do not use the same vacuum pump for evacuating the R-
134a and R-12 systems interchangeably (The vacuum
pump hose fitting is a M10
×
1.5).
•
R-134a vacuum pumps must have a positive shutoff valve.
CAUTION
Never use the same vacuum pump for both R-134a and R-
12 systems, as cross contamination of compressor oil
may occur.
Refrigerant Recovery, Recycling and
Charging
•
R Avoid releasing the R-134a into the atmosphere.
Use the ACR
4
(R-134a Refrigerant Recovery/Recycling/
Recharging/System) or equivalent to recover and recycle R-
134a. Note that the ACR
4
(or equivalent) is not
interchangeable between the R-134a and R-12 systems.
ACR
4
(115V 60 Hz) : 5-8840-0629-0 (J-39500-A)
ACR
4
(220-240V 50/60 Hz)
: 5-8840-0630-0 (J-39500-220A)
ACR
4
(220-240V 50/60 Hz Australian model)
: 5-8840-0631-0 (J-39500-220ANZ)
HEATING AND AIR CONDITIONING 1-15
Refrigerant Leak Inspection
•
The flame type gas leak detector for the R-12 system
cannot be used with the R-134a system.
•
The electric leak detector for the R-12 cannot be used with
the R-134a system as the R-134a particles are far smaller
than the R-12 molecules and, therefore, may not be always
detected. Use leak detectors designed exclusively for the
R-134a system.
1-16 HEATING AND AIR CONDITIONING
PRECAUTIONS FOR REPLACEMENT OR
REPAIR OF R-134a AIR CONDITIONING PARTS
There are certain procedures, practices and precautions that
should be followed when servicing air conditioning systems:
•
Keep your work area clean.
•
Always wear safety goggle and protective gloves when
working on refrigerant systems.
•
Beware of the danger of carbon monoxide fumes caused by
running the engine.
•
Beware of discharged refrigerant in enclosed or improperly
ventilated garages.
•
Always disconnect the negative battery cable and discharge
and recover the refrigerant whenever repairing the air
conditioning system.
•
When discharging and recovering the refrigerant, do not
allow refrigerant to discharge too fast; it will draw
compressor oil out of the system.
•
Keep moisture and contaminants out of the system. When
disconnecting or removing any lines or parts, use plugs or
caps to close the fittings immediately.
Never remove the caps or plugs until the lines or
reconnecting the lines, use two wrenches to support the line
fitting, to prevent from twisting or other damage.
•
Always install new O-rings whenever a connection is
disassembled.
•
Before connecting any hoses or lines, apply new specified
compressor oil to the O-rings.
•
When removing and replacing any parts which require
discharging the refrigerant circuit, the operations described
in this section must be performed in the following sequence:
1) Using the ACR
4
(R-134a Refrigerant Recovery/
Recycling/Recharging/System) or equivalent to
thoroughly discharge and recover the refrigerant.
ACR
4
(115V 60Hz)
:5-8840-0629-0 (J-39500-A)
ACR
4
(220-240V 50/60Hz)
: 5-8840-0630-0 (J-39500-220A)
ACR
4
(220-240V 50/60Hz Australian model)
: 5-8840-0631-0 (J-39500-220ANZ)
2) Remove and replace the defective part.
3) After evacuation, charge the air conditioning system and
check for leaks.
HEATING AND AIR CONDITIONING 1-17
REPAIR OF REFRIGERANT LEAKS
Refrigerant Line Connections
Install new O-ring, if required. When disconnecting or
connecting lines, use two wrenches to prevent the connecting
portion from twisting or becoming damaged.
When connecting the refrigerant line at the block joint, securely
insert the projecting portion of the joint portion into the
connecting hole on the unit side and secure with a bolt.
Apply specified compressor oil to the O-rings prior to
connecting.
CAUTION:
Compressor (PAG) oil to be used varies according to
compressor model. Be sure to apply oil specified for the
model of compressor.
O-rings must be fitted in the groove (1) of refrigerant line.
Insert the nut into union. First tighten nut by hand as much as
possible. Then, tighten nut to specified torque.
(Refer to "Special Parts Fixing Nuts and Bolts" in this section)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст