Evacuate air conditioning system, leak test

AR83.30-T-1762BAS

Evacuate air conditioning system, leak test

12.06.2019

Model

NMB613.455

with code HKB (Konvekta ACX 641 SAPTCO air conditioning without roof heater)

with code HO4 (Front air conditioning)

Model

NMB613.455

with code HKE (Konvekta ACX 642 air conditioning with roof heater)

with code HO4 (Front air conditioning)

Shown on model 613.455 with air conditioning system Konvekta ACX 641 SAPTCO without roof heater, code HKB

2

Pressure side shutoff valve

3

Pressure-side testing and filling valve

4

Suction side testing and filling valve

5

Intake side shutoff valve

Evacuate

 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

Topical note

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

AH83.30-N-0005-01A

Topical note

Procedure for a damaged or leaky air conditioning system

AH83.30-N-0004-01A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

1

Open electromagnetic shutoff valve

Open and close electromagnetic shutoff valve manually

AR83.30-T-5460AA

Activate solenoid of electromagnetic shutoff valve

AR83.30-T-5470BAC

2

Connect suction and pressure line of air conditioning vacuum and recycling unit to pressure side test and filling valve (3) and to intake side test and filling valve (4)

 Observe operating instructions for air conditioning vacuum and recycling unit.

3

Remove cover cap over pressure side shutoff valve (2) and cover cap over intake side shutoff valve (5)

4

Screw in pressure side shutoff valve (2) and intake side shutoff valve (5) approx. 3 turns

 By screwing in the pressure side shutoff valve (2) and the intake side shutoff valve (5), the pressure side test and filling valve (3) and the intake side test and filling valve (4) are opened.

5

Evacuate air conditioning system

  Evacuate air conditioning system circuit up to the maximum achievable vacuum, but for at least 1 hour.
 If moisture has entered into the air conditioning system circuit, evacuate for at least 8 hours.

Leak test

6

Switch off air conditioning vacuum and recycling unit

 Close valves of air conditioning vacuum and recycling unit. Closing the valves prevents the leak test from being falsified by the air conditioning vacuum and recycling unit.

7

Read off vacuum level from manometer of air conditioning vacuum and recycling unit

 Note vacuum value.

8

After 10 minutes waiting time, read off the vacuum display from the manometer again

 Compare current vacuum value with noted-down vacuum value.

If there is a vacuum reduction:



Fill air conditioning system without leak test

AR83.30-T-1777BAS

After filling the air conditioning system, perform a test for leaky areas:



Inspect the air conditioning circuit for leaks

AR83.30-T-1209-01C

Drain air conditioning system before performing repair work at leaky areas:



Drain air conditioning system

AR83.30-T-1780BAS

After repair work, perform another leak test:



Repeat operation steps 1 to 8.

9

Fill air conditioning system

AR83.30-T-1777BAS

 Do not perform evacuation and leak test.