63
!
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.
■
When tightening the nuts on any connections,
hold 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.
Switch off vacuum pump. Wait approx. 5 min. If the
indication on the vacuum gauge rises, there is a
leak.
Fix leak. Repeat 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 precharged with refrigerant.
■
No additional charging is required for line lengths
from 5 to 10 m.
■
For refrigerant line lengths, see page 25.
■
The system may only be recharged with refrigerant
in a liquid state.
■
In conjunction with refrigerant R32:
Observe safety instructions and measures for work-
ing with flammable refrigerants.
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.
When tightening the nuts on any connections,
hold with a second open-ended spanner.
Line lengths up to 10 m
1. Remove the caps from the shut-off valves of the
outdoor unit.
2. Open both shut-off valves. Refit caps.
3. 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.
4. Screw the union nut with copper cap onto the serv-
ice valve (Schrader valve) of the outdoor unit: Tor-
que 15 to 20 Nm
Line lengths greater than 10 m
1. Connect the hose between the pressure gauge set
and refrigerant bottle.
Evacuate the hose and pressure gauge set.
Commissioning, inspection, maintenance
Evacuating the refrigerant lines and indoor unit (cont.)
6199585
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