Evacuating air conditioning, checking for leaks

AR83.30-L-1762A

Evacuating air conditioning, checking for leaks

28.2.00

Evacuating

Danger!

Risk of explosion from welding or braizing work on closed air conditioning system. Risk of poisoning from inhaling overheated refrigerant vapors. Risk of injury from skin and eye contact with liquid refrigerant.

Do not carry out any welding work on the closed air conditioning system or in the surrounding area. No smoking or naked flames. Wear eye protection and protective gloves. Work only in well ventilated areas. Do not carry out repair work on the circuit of the air conditioning system unless the system is drained.

AS83.00-Z-0001-01A

1

Attach suction, treatment and filling device to testing and filling valve ( 1, 2)



*WE58.40-Z-1002-22A

2

Evacuate air conditioning system

 Observe suction, treatment and filling device operating instructions.

Evacuate air conditioning system circuit until maximum possible vacuum has been reached, but for no less than 30 minutes.

Leak testing

3

Switch suction, treatment and filling device off and read off vacuum indicator

 Note vacuum value, wait approx.
10 minutes and read off vacuum indicator again.

Compare difference between indicated and noted values to specified value.

*BE83.30-N-1004-04B

If vacuum drop exceeds specified value: 

Examine circuit for leaks

AR83.30-D-1209-01A

If pressure drop is in specified value range: 

Fill air conditioning system

AR83.30-L-1767A

4

Remove suction and pressure lines from testing and filling valves (1, 2)



*WE58.40-Z-1002-22A

Number

Designation

Models 667, 668, 670
with code H03

BE83.30-N-1004-04B

Permitted vacuum drop during air conditioning system leak test (10 min.)

mbar

200

WE58.40-Z-1002-22A

Air conditioning service station