61
P
Valve for vacuum gauge
Q
Vacuum gauge
!
Please note
Overpressure will damage the vacuum gauge.
Never subject the vacuum gauge to positive
pressure.
1.
Close all valves at the pressure gauge set.
2.
Make all connections as shown above.
Note
■
Shut-off valve
E
must
remain closed.
■
For
all
connections, counterhold with a second
open-ended spanner.
3.
Start the vacuum pump.
At the pressure gauge set, open the valve to the
vacuum pump and the valve to the hot gas connec-
tion.
4.
After approx. 5 min, open the valve to the vacuum
gauge.
Leave the vacuum pump running until the indica-
tion on the vacuum gauge is almost at "0" (at least
30 min).
Note
The vacuum pump runtime will depend on the
ambient conditions.
5.
On the pressure gauge set, close the valve to the
vacuum pump.
Stop the vacuum pump and wait approx. 5 min. If
the indication on the vacuum gauge rises, there is
a leak.
Eliminate the leak and repeat the process.
6.
Close all valves at the pressure gauge set.
7.
Remove the vacuum pump and vacuum gauge.
Charging the refrigerant lines and indoor unit
Note
■
The outdoor unit is pre-charged with refrigerant
R410A.
■
No additional charging is required for line lengths up
to 12 m.
■
For lengths of refrigerant lines, see page 24.
■
The system may only be recharged with refrigerant
R410A in a
liquid state
.
Danger
Direct contact with refrigerant can harm the skin.
Wear safety goggles and protective gloves when
working on the refrigerant circuit.
!
Please note
Recharging the system with refrigerant or evac-
uating the refrigerant can cause the condenser
to freeze up.
Flush the secondary side of the condenser with
water or drain it completely.
!
Please note
Mechanical stress will damage the connections.
For
all
connections, counterhold with a second
open-ended spanner.
Line lengths up to 12 m:
1.
Promptly undo the fill hose from the service valve
(Schrader valve) of the outdoor unit: the pressure
in the pipework must be greater than the ambient
pressure.
2.
Fit the union nut with copper cap to the service
valve (Schrader valve) of the outdoor unit: torque
15 to 20 Nm
3.
Remove the caps from the shut-off valves of the
outdoor unit.
4.
Open both shut-off valves and refit the caps.
Commissioning, inspection, maintenance
Evacuating the refrigerant lines and indoor unit
(cont.)
5790 931 GB
