2003 DAEWOO MATIZ oil pressure

MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7B–15
DAEWOO M-150 BL2
Refrigerant Recovery
Important: Use only a refrigerant tank that is designed
for the charging station in use. The unit’s overfill limita-
tion mechanism is calibrated specifically for use with this
tank. The tank’s valves are also specifically for this unit.
1. Attach the high side hose with the quick disconnect
coupler to the high side fitting of the vehicle’s A/C
system.
2. Open the coupler valve after attachment.
3. Attach the low side hose with the quick disconnect
coupler to the low side fitting of the vehicle’s A/C
system.
4. Open the coupler valve after attachment.
5. Check the high side and the low side gauges on the
unit’s control panel in order to ensure that the A/C
system has pressure. If there is no pressure, there
is no refrigerant in the system to recover.
Important: If there is no refrigerant in the system, do
not continue with the recovery operation. This will draw
air into the recovery tank.
6. Open both the high side and the low side valves.
7. Open the gas and the liquid valves on the tank.
8. Drain any oil that may be in the oil separator.
9. Close the oil drain valve.
10. Plug the unit into the proper voltage outlet.
11. Turn on the main power switch.
Notice: Never reuse refrigerant oil. Damage to the A/C
system may result. Dispose of the refrigerant oil proper-
ly.
12. Begin the recovery process. Refer to the manufac-
turer’s instructions for the charging station in use.
Important: Some A/C system PAG lubricating oil may
be removed with the refrigerant during recovery. The
amount of oil removed varies. A charging station sepa-
rates the oil from the refrigerant and allows a means of
determining how much oil was removed. Replace the
same amount of oil when you recharge the system. Re-
fer to the manufacturer’s instructions for the charging
station in use.
13. Wait 5 minutes. Check the control panel low side
gauge. If the A/C has maintained vacuum, the re-
covery is complete.
14. There is more refrigerant in the system if the low
side gauge pressure rises above zero. Recover the
additional refrigerant. Repeat this step until the sys-
tem maintains vacuum for two minutes.
Important: If the control indicator shows that the refrig-
erant tank is full during the recovery process and the unit
shuts off, install an empty unit tank to store the refriger-
ant needed for steps later in the procedure. Do not use
any other type of tank.
Evacuation
The unit tank must contain a sufficient amount of R-134a
refrigerant for charging. Check the amount of refrigerant
in the tank. If there is less than 3.6 kg (8 pounds) of re-
frigerant, add new refrigerant to the tank. Refer to the
manufacturer’s instructions for adding refrigerant.
1. Verify that the high side and the low side hoses are
connected to the A/C system. Open both the high
side and the low side valves on the unit’s control pan-
el.
2. Open both the gas and the liquid valves on the tank.
Important: Refer to the manufacturer’s instructions for
the charging station in use. It is necessary to evacuate
the system before recharging it with new or recycled re-
frigerant.
3. Start the vacuum pump and begin the evacuation
process. Non-condensable gases (mostly air) are au-
tomatically vented from the tank during the recycling
process. You may hear the pressure being released.
4. Check for leaks in the system. Refer to the manufac-
turer’s instructions for the charging station in use.
Important:
Change the vacuum pump oil frequently. Refer to the
manufacturer’s instructions for the charging station in
use.
A/C System Oil Charge Replenishing
Any oil removed from the A/C system during the recov-
ery process must be replenished at this time.
1. Use the correct graduated bottle of polyalkaline glycol
(PAG) oil for the R-134a system.
Important:
Keep the oil bottles tightly capped at all times to pro-
tect the oil from moisture and contamination.
Never open the oil injection valve while there is posi-
tive pressure in the A/C system. This will result in oil
blow-back through the bottle vent. You must have
A/C system vacuum for this operation.
Never let the oil level drop below the pick-up tube
while charging or replenishing the system. This will
allow air into the A/C system.
2. Refer to the manufacturer’s instructions for the charg-
ing station in use. Add the proper amount of PAG oil
to the system.
3. Close the valve when the required oil charge has
been pulled into the system.
Charging
Important: Evacuate the air conditioning system before
charging.
1. Close the low side valve on the control panel.
2. Open the high side valve on the control panel.

7B–20 MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO M-150 BL2
D108B507
RECEIVER DRYER BRACKET
Removal Procedure
1. Remove the front bumper fascia. Refer to Section
9O, Bumpers and Fascias.
2. Remove the receiver dryer bracket.
Remove the receiver dryer bracket bolt (1).
Remove the receiver dryer bracket–to–body bolts
(2).
D18B508B
Installation Procedure
1. Install the receiver dry bracket with the bolts.
Tighten
Tighten the receiver dryer bracket–to–body bolts
to 5 Nm (44 lb-in) (1).
Tighten the receiver dryer bracket bolt to 5 Nm
(44 lb-in) (2).
2. Install the front bumper fascia. Refer to Section 9O,
Bumpers and Fascias.
D108B509
D18B510A
COMPRESSOR
Removal Procedure
1. Remove the receiver dryer. Refer to “Receiver Dryer
and Dual Cut Switch” in this section.
2. Remove the A/C belt. Refer to Section 6B, Power
Steering Pump.
3. Remove the compressor.
Discharge and recover the refrigerant. Refer to
“Discharging, Adding Oil, Evacuating, and Charg-
ing Provedures for A/C System” in this section.
Remove the bolt securing the low pressure pipe
line to the compressor (1).
Remove the bolt securing the high pressure pipe
line to the compressor (2).
Disconnect the electrical connector (3).
Remove the upper bolt mounting the compressor–
to–bracket (4).
Remove the lower bolts mounting the compres-
sor–to–bracket (5).

MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7B -- 21
DAEWOO M-150 BL2
D18B511B
Installation Procedure
1. Install the compressor with the mounting bolts.
Tighten
DTighten the compressor--to--bracket upper bolt to
20 NSm (15 lb-ft) (1).
DTighten the compressor--to--bracket lower bolts to
22 NSm (16 lb-ft) (2).
2. Connect the electrical connector.
D18B512A
3. Install the A/C high pressure pipe line to the compres-
sor with the bolt.
Tighten
Tighten the A/C high pressure pipe line bolt to 23 NSm
(17 lb-ft) (3).
4. Install the A/C low pressure pipe line to the compres-
sor with the bolt.
Tighten
Tighten the A/C low pressure pipe line bolt to 23 NSm
(17 lb-ft) (4).
5. Evacuate and charge the system. Refer to “Discharg-
ing, Adding Oil, Evacuating, and Charging Procedure
for A/C System” in this section.
6. Install the A/C belt. Refer toSection 6B, Power Steer-
ing Pump.
7. Install the receiver dryer. Refer to “Receiver Dryer
and Dual Cut Switch” in this section.
D18B513A
CONDENSER
1. Disconnect the negative battery cable.
2. Remove the front bumper fascia. Refer toSection
9O, Bumpers and Fascias.
3. Discharge and recover the refrigerant. Refer to “Dis-
charging, Adding Oil, Evacuating, and Charging Pro-
cedures for A/C system” in this section.
4. Remove the condenser.
DLoosen the condenser pipe--to--compressor pipe
fitting (1).
DLoosen the condenser pipe--to--receiver dryer pipe
fitting (2).

7B -- 22 MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO M-150 BL2
D18B514A
DRemove the condenser mounting nuts (3).
DPush the top of the condenser (4).
DTake off the condenser from the lower bracket by
lifting the condenser (5).
DRemove the condenser (6).
D18B515B
Installation Procedure
Important:Discard the removed O--rings.
1. Install the condenser with the nuts.
Tighten
Tighten the condenser mounting nuts to 4 NSm(36lb-
in).
D18B516B
2. Tighten the fittings and the bolt.
Tighten
DTighten the condenser pipe--to--compressor pipe
fitting to 23 NSm (17 lb-ft) (1).
DTighten the condenser pipe--to--receiver dryer pipe
fitting to 14 NSm (10.5 lb-ft) (2).
3. Evacuate and recharge the system. Refer to “Dis-
charging, Adding Oil, Evacuating, and Charging Pro-
cedures for A/C System” in this section.
4. Install the front bumper fascia. Refer toSection 9O,
Bumpers and Fascias.
5. Connect the negative battery cable.
D108B517
A/C HIGH PRESSURE PIPE LINE
(Left -- Hand Drive Shown, Right -- Hand
Drive Similar)
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the front bumper fascia. Refer toSection
9O, Bumpers and Fascias.
3. Discharge and recover the refrigerant. Refer to “Dis-
charging, Adding Oil, Evacuating, and Charging Pro-
cedures for A/C System” in this section.
4. Remove the A/C high pressure pipe line between the
compressor and the condenser.
DRemove the bolt securing the high pressure pipe
line to the compressor (1).

7B -- 24 MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO M-150 BL2
D18B522A
D18B523B
D18B524A
Installation Procedure
Important:Discard the removed O--rings.
1. Install the high pressure pipe lines with the bolts, the
nuts, and the fittings.
Tighten
DTighten the bolt securing the high pressure pipe
line to the compressor to 23 NSm (17 lb-ft) (1).
DTighten the fitting securing the high pressure pipe
line to the condenser pipe line to 23 NSm (17 lb-ft)
(2).
DTighten the fitting securing the high pressure pipe
line to the receiver dryer to 14 NSm (10.5 lb-ft) (3).
DTighten the bracket nut to 5 NSm (44 lb-in) (4).
DTighten the receiver dryer flange nuts to 14 NSm
(10.5 lb-ft) (5).
DTighten the nut securing the high pressure pipe line
to the evaporator to 14 NSm (10.5 lb-ft) (6).
DTighten the bracket nut to 5 NSm (44 lb-in) (7).
2. Install the purge control valve. Refer toSection 1F,
Engine controls.
3. Evacuate and recharge the system. Refer to “Dis-
charging, Adding Oil, Evaculating, and Charging Pro-
cedures for A/C System” in this section.
4. Install the front bumper fascia. Refer toSection 9O,
Bumpers and Fascias.
5. Connect the negative battery cable.
D18B525B

MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7B -- 25
DAEWOO M-150 BL2
D108B526
A/C LOW PRESSURE PIPE LINE
(Left -- Hand Drive Shown, Right -- Hand
Drive Similar)
Removal Procedure
1. Disconnect the negative battery cable.
2. Discharge and recover the refrigerant. Refer to “Dis-
charging, Adding Oil, Evacuating, and Charging Pro-
cedures for A/C System” in this section.
3. Remove the A/C low pressure pipe line.
DRemove the bolt securing the A/C low pressure
pipe line at the compressor (1).
D18B527A
DRemove the bracket nut from shut bar (2).
D18B528A
DRemove the purge control valve. Refer toSection
1F, Engine Controls.
DLoosen the nut securing the A/C low pressure pipe
line at the evaporator (3).
D18B529B
Installation Procedure
Important:Discard the removed O--rings.
1. Install the A/C low pressure pipe line.
Tighten
DTighten the nut securing the A/C low pressure pipe
line at the evaporator to 14 NSm (10.5 lb-ft) (1).

7B -- 26 MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO M-150 BL2
D18B530B
D18B531A
DTighten the bracket nut to 5 NSm (44 lb-in) (2).
DTighten the bolt securing the A/C low pressure pipe
line at the compressor to 23 NSm (17 lb-ft) (3).
2. Evacuate and recharge the system. Refer to “Dis-
charging, Adding Oil, Evacuating, and Charging Pro-
cedure for A/C System” in this section.
3. Connect the negative battery cable.
D108B532
D108B533
EVAPORATOR UNIT AND DRAIN
HOSE
(Left -- Hand Drive Shown, Right -- Hand
Drive Similar)
Removal Procedure
1. Disconnect the negative battery cable.
2. Discharge and recover the refrigerant. Refer to “Dis-
charging, Adding Oil, Evacuating, and Charging Pro-
cedures for A/C System” in this section.
3. Loosen the high pressure pipe line (receiver dry-
er→evaporator) nut and the low pressure pipe line
(evaporator→compressor) nut.
4. Remove the glove box. Refer toSection 9E, Instru-
mentation/Driver information.
5. Remove the evaporator unit.
DRemove the drain hose (1).
DDisconnect the thermistor connector (2).
DRemove the screws (3).
DRemove the evaporator backward slowly (4).

MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7B -- 27
DAEWOO M-150 BL2
D18B534A
Installation Procedure
1. Install the evaporator evaporator with the screws.
2. Connect the thermistor connector.
3. Install the drain hose.
4. Install the glove box. Refer toSection 9E, Instrumen-
tation / Driver Information.
5. Tighten the high pressure pipe line (receiver dry-
er→evaporator) nut and the low pressure pipe line
(evaporator→compressor) nut to 14 NSm (10.5 lb-ft).
6. Evacuate and recharge the system. Refer to “Dis-
charging, Adding Oil, Evacuating, and Charging Pro-
cedures for A/C System” in this section.
7. Connect the negative battery cable.