refrigerant type SUBARU LEGACY 1999 Service Repair Manual

1. Air Conditioning System
A: SPECIFICATIONS
Item Specifications
Type of air conditioner Reheat air-mix type
Cooling capacity (IMACA)4.885 kW
(4,200 kcal/h, 16,666 BTU/h)
RefrigerantHFC-134a (CH
2FCF3)
[0.55 Ð 0.65 kg
(1.21 Ð 1.43 lb)]
CompressorType 5-vane rotary, fix volume (DKV-14G)
Discharge 140 cm
3(8.54 cu in)/rev
Max. permissible speed 7,000 rpm
Magnet clutchType Dry, single-disc type
Power consumption 45 W
Type of belt V-Ribbed 4 PK
Pulley dia. (effective dia.) 125 mm (4.92 in)
Pulley ratio 1.064
CondenserType Corrugated fin (Multi-flow)
Core face area 0.215 m
2(2.31 sq ft)
Core thickness 19 mm (0.75 in)
Radiation area 4.7 m
2(51 sq ft)
Receiver drier Effective inner capacity 290 cm3(17.70 cu in)
Expansion valve Type Internal equalizing
EvaporatorType A-laminate
Dimensions (W´H´T)60´224´235 mm
(2.36´8.82´9.25 in)
Blower fanFan type Sirocco fan
Outer diameter´width 150´75 mm (5.91´2.95 in)
Power consumption 230 W at 12 V
Condenser fan
(Sub fan)Motor type Magnet
Power consumption 120 W at 12 V
Fan outer diameter 320 mm (12.60 in)
Radiator fan
(Main fan)Motor type Magnet
Power consumption 120 W at 12 V
Fan outer diameter 320 mm (12.60 in)
Idling speed with
F.I.C.D. in operationMPFI model850±100 rpm (700±100 rpm ªDº range in AT
model)
Dual switch
(Pressure switch)
High-pressure line
B4M0755A
Compressor relief valve
blow-out pressure
B4M0084A
2
4-7[S1A0]SPECIFICATIONS AND SERVICE DATA
1. Air Conditioning System

1. Safety Precautions
A: HFC-134a AIR CONDITIONING
SYSTEM
Component parts of the cooling system,
refrigerant, compressor oil, and other parts are not
the same for the HFC- 134a system and the older
CFC-12 system. Do not interchange parts or liquid.
Vehicles with HFC-134a air conditioning systems,
use only HFC-134a parts that are indicated on a
label attached to the vehicle. Before performing
any maintenance, verify the type of air conditioning
system installed in the vehicle.
B4M0780
B: COMPRESSOR OIL
Do not use any compressor oil that is not specifi-
cally designated for the HFC-134a air conditioning
system; only use ZXL200PG. Also, do not use
HFC-134a compressor oil in the CFC-12 air condi-
tioning system. If compression oils are mixed, poor
lubrication will result and the compressor itself may
be damaged.
Because HFC-134a compressor oil is very hygro-
scopic (easily absorbs moisture), when parts of the
air conditioning system are being removed, quickly
install a blind plug to prevent contact with the out-
side air. Also, always make sure that the service
container for compressor oil is tightly closed except
when in use. Store compressor oil in a tightly
closed steel container.
C: REFRIGERANT
Do not put CFC-12 refrigerant into a HFC-134a air
conditioning system. Also, do not put HFC-134a
refrigerant into a CFC-12 air conditioning system.
If the wrong refrigerant is used, poor lubrication willresult and the compressor itself may be destroyed.
7
[W1C0]4-7SERVICE PROCEDURE
1. Safety Precautions

3. Tools and Equipment
The following section provides information about
the tools and equipment that will be necessary to
properly service the A/C system.
Since equipment may vary slightly depending on
the manufacturer, it is important to always read and
follow the manufacturer's instructions.
CAUTION:
When working on vehicles with the HFC-134a
system, only use HFC-134a specified tools and
parts. Do not mix with CFC-12 tools and parts.
If HFC-134a and CFC-12 refrigerant or com-pressor oil is mixed, poor lubrication will result
and the compressor itself may be destroyed. In
order to help prevent mixing HFC-134a and
CFC-12 parts and liquid, the tool and screw
type and the type of service valves used are
different. The gas leak detectors for the HFC-
134a and CFC-12 systems must also not be
interchanged.
HFC-134a CFC-12
Tool & screw type Millimeter size Inch size
Valve type Quick joint type Screw-in type
Tools and Equipment Description
IWRENCH
VariousWRENCHESwill be required to service any A/C sys-
tem. A 7 to 40 N´m (0.7 to 4.1 kg-m, 5 to 30 ft-lb) torque
wrench with various crowfoot wrenches will be needed. Open
end or flare nut wrenches will be needed for back-up on the
tube and hose fittings.
G4M0571
IAPPLICATOR BOTTLE
A smallAPPLICATOR BOTTLEis recommended to apply
refrigerant oil to the various parts. They can be obtained at a
hardware or drug store.
G4M0572
IMANIFOLD GAUGE SET
AMANIFOLD GAUGE SET(with hoses) can be obtained
from either a commercial refrigeration supply house or from
an auto shop equipment supplier.
G4M0573
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[W300]4-7SERVICE PROCEDURE
3. Tools and Equipment

8. Leak Testing
A: INSPECTION
The following points should be kept in mind when
conducting a refrigerant leak test.
1) The A/C system to be tested must have an
adequate refrigerant charge to begin with.
2) The area where the leak test is conducted must
be free of wind and drafts, with still air being the
ideal condition.
3) The atmosphere where the leak test is con-
ducted must be free of refrigerant contamination.
4) Operate the A/C system for approx. 10 minutes,
then turn the engine off an begin the leak test.
5) Refrigerant gas is heavier than air, therefore
always hold the probe below the connection being
tested.
6) When checking for a leak along a length of
hose or tube, the leak detector probe must be
moved slowly, approx. 25 mm (1 in) per second
making sure probe does not come in contact with
the component being tested.
7) When checking for a leak at a certain point, the
leak detector probe must be held at that point for
at least 5 seconds.
1. CHECK THE SYSTEM PRESSURE
With gauges connected to the A/C system, operate
the A/C and confirm that the high side pressure is
above 690 kPa (7.03 kg/cm
2, 100 psi). If not,
evacuate and charge the system before leak
checking (refer to evacuation and charging sec-
tions).
G4M0609
2. CLEAN CONNECTIONS BEFORE
TESTING
Before testing, use a clean shop towel to wipe off
refrigerant oil, dirt, or foreign material from all of the
connections and components to be tested.
NOTE:
Since refrigerant oil absorbs refrigerant, excess oil
on or near a connection may falsely signal a leak.
3. CALIBRATE LEAK DETECTOR
Refer to the manufacturer's instructions for the par-
ticular type of detector used and calibrate the
instrument.
CAUTION:
Always make sure that the probe tip filter is
clean and free of contamination.
B4M0089
4. LEAK TEST (HIGH-PRESSURE SIDE)
Operate the A/C system for approx. 10 minutes,
then turn the engine off and begin the leak test.
1) Begin at the connection of the high-pressure
tube to the evaporator, and work your way along
the high- pressure side of the system to the com-
pressor. There are three places to check on each
tube connection.
2) Check the area.
ICheck the area where the fitting joins the tube.
G4M0612
ICheck the area where the two parts of the fitting
join each other.
G4M0613
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[W8A4]4-7SERVICE PROCEDURE
8. Leak Testing

11. Compressor
A: INSPECTION
1. COMPRESSOR CLUTCH
NOTE:
ICompressor is a swash plate type. When trouble
occurs, replace compressor as a single unit.
ICompressor clutch trouble is often caused by
clutch slippage and noise. Check and take correc-
tive measures, as required.
1) Remove belt cover.
B4M0090
2) Compressor clutch trouble is often caused by
clutch slippage and noise. Check and take correc-
tive measures, as required.
Clearance:
0.3 Ð 0.6 mm (0.012 Ð 0.024 in)
B4M0091
3) Check that voltage applied to magnetic coil is at
least 10.5 volts.
4) When noise is noted, check that it originates in
either compressor or pulley bearing.
B: REMOVAL
1) Disconnect ground cable from battery.2) Discharge refrigerant using refrigerant recovery
system.
(1) Fully close low-pressure valve of manifold
gauge.
(2) Connect low-pressure charging hose of
manifold gauge to low-pressure service valve.
(3) Open low-pressure manifold gauge valve
slightly, and slowly discharge refrigerant from
system.
CAUTION:
Do not allow refrigerant to rush out. Otherwise,
compressor oil will be discharged along with
refrigerant.
B4M0760A
3) Remove low-pressure hose (a) and high-pres-
sure hose (b).
CAUTION:
IBe careful not to lose O-ring of low-pressure
hose.
IPlug the opening to prevent foreign matter
from entering.
B4M0761D
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4-7[W11A1]SERVICE PROCEDURE
11. Compressor