1998 SSANGYONG MUSSO Workshop Repair Manual

MANUAL & SEMIAUTO-HVAC 7B/C-7
Switch
Door
VENT Door
FOOT Door
DEF Door
INTAKE Door
AIR MIX Door
Air Flow
Mode Switch
VENT
A
C
DRecirculation Switch Temperature
Control Lever
[MANUAL]
[SEMI AUTO]
-
-
-
- B/L
B
B
DFOOT
C
A
DD/F
C
B
BDEF
C
C
AREC FRE
-
-
ABC
INDI.
On
-
-
-
AINDI.
Off
-
-
-
B

7B/C-8 MANUAL & SEMIAUTO-HVAC
AIR CONDITIONER SYSTEM
DIESEL ENGINE
1 Compressor
2 High Pressure Hose
3 Condenser Fan
4 Condenser
5 Liquid Pipe (A)
6 Receiver Drier
7 Liquid (B)
8 Evaporator Assembly
9 Low Pressure Hose10 Water Inlet Hose
11 Water Outlet Hose
12 Control Assembly
13 Heater Unit Amplifier
14 Mix Actuator Assembly
15 Blower Unit
16 Heater Unit
17 Mode Actuator Assembly

MANUAL & SEMIAUTO-HVAC 7B/C-9
GASOLINE ENGINE
1 Compressor
2 High Pressure Hose
3 Condenser
4 Main Condenser Fan
5 Sub Condenser Fan
6 Condenser Fan Resistor
7 Liquid Pipe(A)
8 Receiver Dryer
9 Liquid Pipe(B)
10 Grommet11 Evaporator Assembly
12 Control Assembly
13 Heater Unit Amp
14 Mix Actuator
15 Blower Unit
16 Heater Unit
17 Mode Actuator Assembly
18 Water Inlet Hose
19 Water Outlet Hose

7B/C-10 MANUAL & SEMIAUTO-HVAC
REFRIGERANT CHARGING
Installation of Manifold Gauge
1. Close both high/low pressure hand valve of gauge before
installation of gauge to the charging valve.
2. Connect the low pressure hose of the gauge to the low
pressure charging valve and the high pressure hose of the
gauge to high pressure charging valve. Tighten the hose
nuts by hand.
Discharging of Refrigerant
1. Connect the manifold gauge to the charging valve.
2. Place the free end of center hose in a shop towel.
3. Slowly open the high pressure hand valve and discharge
refrigerant.
Notice
If refrigerant is allowed to escape too fast, compressor oil
will be drawn out of the system.
MAINTENANCE AND REPAIR

MANUAL & SEMIAUTO-HVAC 7B/C-11
Evacuating Refrigeration System
1. Connect the manifold gauge to the charging valves.
2. Connect the center hose of the gauge to the vacuum pump.
3. Run the vacuum pump and open both high and low pressure
hand valves.
4. Run the vacuum pump 15-20 minutes.
5. Check that both high and low pressure gauge reading is
more than (-) 750mmHg of vacuum and close both valves.
Check for Refrigerant Leaks
1. Connect the center hose of the gauge to the refrigerant
tank.
2. Open the high pressure valve of the gauge to charge with
refrigerant gas.
3. Charge until the low pressure gauge reads 1.0kg/cm and
close the valve.
4. Using a gas leak detector, check the system for leaks.
5. If a leak is found, replace a O-ring or repair the faulty
connection
2
6. Stop the vacuum pump and wait about 5 minutes.
7. After 5 minutes, check that low pressure gauge reading is
changed or not.
8. If low pressure gauge reading is changed, check the system
for leaks and repair as necessary and repeat steps from
‘1’ to ‘7’.
9. If there are no changes in low pressure gauge reading,
disconnect the vacuum pump.
4. After the high pressure gauge reading drops below 3.5kg/
cm2 , slowly open the low pressure valve.
5. When both high and low pressure gauges reading drops to
0 kg/cm, discharging is completed.

7B/C-12 MANUAL & SEMIAUTO-HVAC
Charging Refrigerant
1. Connect the manifold gauge to the charging valve and
evacuate the system.
2. Connect the center hose of the gauge to the refrigerant
tank.
3. Open the high pressure valve and charge the system with
350g of refrigerant.
4. Close the high pressure valve and start the engine and run
the compressor.
Notice
Never open the high pressure valve when the compressor
is running. Refrigerant gas will be charged reverse.
5. Slowly open the low pressure valve and charge the system
with refrigerant.
Standard650 - 750 g
6. Close the low pressure valve after charging.
Notice
Checking the pressure through the sight glass is impossible
by applying & R-134a.
7. Stop the engine and disconnect the manifold gauge from
the system.
Operation Check
1. Place a dry bulb thermometer to the front duct.
2. Place a psychrometer close to the inlet of the cooling unit
(under the glove box).
3. Run the engine at 1,500 rpm.
4. Set the blower switch at ‘HI’ and A/C switch ‘ON”.
5. Set the temperature control lever at ‘COOL’.
6. Set the air flow control at ‘REC’.
7. Check that air conditioning system is stabilized.
Temperature of Air Inlet
High Pressure Gauge Reading 25 - 35°C
13.2 - 18.5kg/cm
2

MANUAL & SEMIAUTO-HVAC 7B/C-13
Replacement of Refrigerant Connection (O-ring
Type)
1. When connecting a O-ring type, apply compressor oil to
portions shown in illustration. Be careful not to apply oil to
threaded portion.
Notice
Use specified compressor oil.
2. O-rings must be closely attached to inflated portion of pipe
and always replace used O-rings.
3. After inserting the pipe to the union, tighten the nut by hand
as much as possible and tighten the nut to specified torque.
4. When connecting liquid pipe(B) and low pressure hose(A)
to evaporate pipe, apply compressor oil to the O-ring.
5. When tightening, set the center of pipe and tighten fully.
6. Tighten the nut by specified wrench.
Installation Notice
Tightening Torque Inlet Side to 12 - 15Nm
Low Pressure Hose (A) 30 - 35 Nm

7B/C-14 MANUAL & SEMIAUTO-HVAC
CONDENSER
Preceding Work : Removal of the radiator
1 Bolt
2 Condenser Fan
3 Bolt
4 Condenser
Diesel Engine