61
!
Please note
Commissioning is weather-dependent. At out-
side temperatures below 0 °C, moisture can
condense and sublimate in the refrigerant lines.
If water droplets and/or ice particles enter the
compressor, they may cause damage to the
appliance.
In the case of high relative humidity or outside
temperatures below 0 °C, please observe the
following:
■
Use nitrogen 5.0 for the pressure test.
■
During evacuation, take suitable steps to keep
the surface temperature of the refrigerant lines
above
0 °C.
Danger
Direct contact with refrigerant can be harmful to
skin.
Wear safety goggles and protective gloves when
working on the refrigerant circuit.
!
Please note
Escaping refrigerant will cause environmental
pollution.
■
Before evacuating the refrigerant lines and the
internal unit, check all connections for tight-
ness with leak detection spray.
■
Keep the valves on the external unit shut, and
fill the system with nitrogen through the serv-
ice valve. The test pressure is the max. per-
missible operating pressure.
Evacuating the indoor unit with a vacuum gauge
P
K
L
M
Q
H
G
N
B
A
C
E
D
E
F
Fig. 57
Example, type AWBT(-M)-E-AC 222.C06
A
Indoor unit
B
Hot gas line
C
Outdoor unit
D
Only for types 222.C08 to 222.C16:
Service valve (Schrader valve)
E
Shut-off valve
F
Service valve (Schrader valve)
G
Liquid line
H
Fill hose between pressure gauge set and outdoor
unit
K
Pressure gauge set
L
Connection hose between pressure gauge set and
vacuum pump
M
Vacuum pump
Commissioning, inspection, maintenance
Evacuating the refrigerant lines and indoor unit
51
17 700 GB
