Remove/install high-voltage battery circuit heat exchanger

AR20.00-P-0210MEV

Remove/install high-voltage battery circuit heat exchanger

11.6.15

Engine

780.009 in model 451.391/491

1

Heat exchanger

4

Retaining clip

7

Coolant hose

2

Nut

5

Electrical connection

Y19/3

Electrical expansion valve (battery)

3

Retaining plate

6

Hose clamps

1

Heat exchanger

9

Bracket

11

Sealing ring

8

Nut

10

Refrigerant lines

Y19/3

Electrical expansion valve (battery)

 Danger !

Risk of explosion caused by welding or soldering work on closed air conditioning system. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with liquid refrigerant.

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated areas. Carry out repair work on the air conditioning system circuit only after the system has been drained.

AS83.00-Z-0001-01A



Protect air conditioning circuit and components from moisture when carrying out repair work

AH83.30-N-0005-01A



Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A



Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A



Notes on handling refrigerant R134a

AH83.30-N-0003-01A

 

Remove/install

1

Detach key and battery charger power supply plug

2

Drain air conditioning system

AR83.30-P-1760MCC

 Installation: Evacuate air conditioning and then fill it.

3

Disconnect air conditioning service unit



000 588 04 82 00 Air conditioning service unit

WS83.00-P-0031B

4

Drain off coolant

Engine 780.009 in model 451.391/491Coolant circuit high-voltage battery

AR20.00-P-1142MEV

5

Remove front axle carrier support

AR33.10-P-0002MEV

6

Unscrew nut (2)

 Nut, refrigerant line to expansion valve

*BA83.55-P-1006-01V

7

Remove retaining plate (3)

8

Open retaining clip (4), expose electrical connection (5) and disconnect

9

Loosen hose clamps (6)

 Installation: Check hose clamps (6) for damage; replace if necessary.

10

Disconnect coolant hoses (7) from heat exchanger (1)

 Collect escaping coolant in a suitable container.

 Installation: Check coolant hoses (7) for damage; replace if necessary.

11

Unscrew nuts (8)

 Nut, bracket for high-voltage battery circuit heat exchanger to body

*BA83.55-P-1008-01V

12

Detach heat exchanger (1) together with an electrical expansion valve (battery) (Y19/3) and bracket (9) to the rear from the refrigerant lines (10) and remove



Compressor oils (specification 362.0)

BB00.40-P-0362-00A


Close off refrigerant lines (10) and A/C expansion valve (battery) (Y19/3) with suitable stop plugs.
Otherwise penetrating dirt and moisture damage components that are connected to the refrigerant circuit.

 Installation: Replace sealing rings (11) at refrigerant lines (10) and moisten with compressor oil when inserting.

13

Install new desiccant cartridge

AR83.30-P-6525MCC

14

Install in the reverse order

15

Check refrigeration system for leaktightness

Engine 780.009 in model 451.391/491Coolant circuit high-voltage battery

AR20.00-P-1010MEW

 Coolant circuit high-voltage battery

 Refrigerant compressor

Number

Designation

Engine 780.009

BA83.55-P-1006-01V

Nut, refrigerant line to expansion valve

Nm

11

 Refrigerant compressor

Number

Designation

Engine 780.009

BA83.55-P-1008-01V

Nut, bracket for high-voltage battery circuit heat exchanger to body

Nm

11