WAKL5N0802A
Edition: 07.02.2022
Page: 9/18
Manual shut-
off valve: remove cap and bring into „shut off” position.
Connect the red manometer (to atmospheric pressure) to service connection (1) of the service
shut-off valve HD
– high pressure – (2) and the blue manometer (to atmospheric pressure) to ser-
vice connection (5) of the service shut-off valve ND
– low pressure – (6) of the refrigerant com-
pressor.
Set service shut-
off valve ND (6) and HD (2) in “Service Position” (turn spindle clockwise ca. three
full circles), and then evacuate.
Switch on the air conditioner and start running the compressor until the manometer ND
shows „0 bar“ on the scale. The compressor is switched off when the low pressure switch
(7) gets activated. Depending on the pressure situation the compressor is switched on and
off again so that the refrigerant can evaporate.
Set service shut-
off valve ND (6) in „Stop Position“ (turn spindle clockwise until stop).
The low pressure switch turns off the compressor when the pressure is < 0,3 bar. Restart-
ing of the air conditioning is possible, provided that the pressure at the low-pressure switch
is above 2.1 bar and the system is turned on.
Demount filter dryer. Please refer to the manual.
Demount filter dryer only immediately before mounting to ensure that the refrigerant circuit
remains open only for a short time. If this is not possible, close the refrigerant circuit (tubing)
with caps or stoppers to prevent entry of air and humidity into the system.
Mount a new filter dryer. Put filter dryer according to the flow direction (arrow) into seating and fas-
ten.
Filter dryer
Oil sight glass
2
1
3
6
5
7
4
