64 11 206 Removing and installing/replacing heating and air-conditioning unit

Special tools required:

WARNING: Danger of injury!

Refrigerant circuit is under high pressure!

Avoid contact with refrigerant and refrigerant fluid.

Read and comply with SAFETY INFORMATION .

IMPORTANT: Risk of damage!

Restart engine only when air conditioning system has been correctly filled.

Follow notes for OPENING AND REPLACING PARTS IN REFRIGERANT CIRCUIT .

If air conditioning system is opened for more than 24 hours:

Replace DESICCANT INSERT .

Necessary preliminary tasks:

Drain off AIR CONDITIONING SYSTEM .
Remove SOUND INSULATION FROM BULKHEAD UPPER PART .
Remove BLOWER HOUSING FOR HEATING AND AIR-CONDITIONING UNIT .
Remove LEFT SUSPENSION CROSS-BRACE .
Remove SUPPORT FOR DASHBOARD .
Disconnect plug connections.
Unclip wiring harness mountings from heating and air-conditioning unit.

Recycling:

Coolant emerges when coolant lines are detached. Have a suitable collecting vessel ready.

Catch and dispose of escaping coolant.

Observe country-specific waste disposal regulations.

Feed out line feed-through (1) towards top.

Fig 1: Identifying Heating And Air-Conditioning Unit Line Feed-Through

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) and remove refrigerant lines (2) with associated gasket.

Tightening torque 64 53 1AZ .

Installation note:

Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.

Fig 2: Identifying Refrigerant Lines And Screws

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IMPORTANT: Connections must not be mixed up!

Mark connection sequence of water hoses prior to removal.

Release hose clamps (1) with special tool 17 2 050 and detach coolant hoses (2).

Fig 3: Identifying Coolant Hoses And Hose Clamps

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IMPORTANT: Carefully blow out coolant ports on the heat exchanger to remove the remaining coolant.

Close openings or line to heat exchanger with special tool 32 1 270 , to avoid media leak and dirt contamination.

Equipment specification with electric auxiliary heater only:

Release screw (1).

Remove grounding cable for electric auxiliary heater (2) from floor trim panel (3).

Fig 4: Identifying Electric Auxiliary Heater And Floor Trim Panel

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NOTE: Length of earthing cable (1) must lie between points 2 and 3 and should be 230 mm to 235 mm long.

Run excess cable as shown in item (4).

Fig 5: Identifying Earthing Cable

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Unlock retaining lug (1) on gaiter (2).

Lever gaiter (2) out of guides.

Installation note:

Make sure retaining lug (1) and adjacent guides are correctly latched.

Fig 6: Identifying Retaining Lug And Gaiter

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WARNING: Protect passenger compartment against emerging coolant.

Unclip air ducts (2), left and right towards bottom, from heater/air conditioner (1).

Feed out heating and air-conditioning unit (1) in direction of arrow.

Installation note:

Water drain (3) must be inserted on both sides into outlet channel (4).

Fig 7: Removing Heating And Air-Conditioning Unit

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: In the event of incorrect fitting, there is a risk of leakage in the passenger compartment!

Replacement:

Modify EVAPORATOR .
Modify HEAT EXCHANGER .
Modify EXPANSION VALVE .
Modify ALL ACTUATOR DRIVES .
Modify OZONE GENERATOR if necessary.
Modify ELECTRIC AUXILIARY HEATER (FRONT) if necessary.

After installation:

EVACUATE AND FILL AIR CONDITIONING
Bleed and fill cooling system. See VENTING/FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT or BLEEDING/CHECKING FOR WATERTIGHTNESS (N63 ENGINE) .
IMPORTANT: Filling and bleeding must not be performed in ECO-PRO MODE!