Daewoo Korando. Manual - part 316

7B/C-12  MANUAL & SEMIAUTO-HVAC

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

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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.

MANUAL & SEMIAUTO-HVAC 7B/C-13

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.

Standard

650 - 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 - 18.5 kg/cm

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7B/C-14  MANUAL & SEMIAUTO-HVAC

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

MANUAL & SEMIAUTO-HVAC 7B/C-15

CONDENSER

Preceding Work : Removal of the radiator

1 Condenser
2 Bolt .......................................................... 4-6 Nm
3 Condenser Fan

4 Sub Fan (Gasoline Engine)
5 Resister (Gasoline Engine)