Viessmann AWB 201.B04, Инструкция по установке и обслуживанию

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2. Make all connections, as shown
above.
!
Please note
Filler valve D must remain
closed.
Finally , connect the end of
the filling hose to the service
valve
E
.
For all connections, counter-
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 connection.
4. After approx. 5 min, open the valve to
the vacuum gauge.
Leave the vacuum pump running until
almost 0 bar is indicated on the vac-
uum gauge (at least 30 min).
Note
The vacuum pump runtime will
depend on the ambient conditions.
5. Close the valve on the pressure
gauge set to the vacuum pump.
Stop the vacuum pump and wait
approx. 5 min. There is a leak if the
indication on the vacuum gauge
rises.
Remove the leak and repeat the proc-
ess.
6. Close all valves at the pressure
gauge set.
7. Remove the vacuum pump and vac-
uum gauge.
Filling refrigerant lines and the internal unit
Note
■ The external unit is pre-filled with
refrigerant R410A.
■ No topping up is required for line
lengths from 3 to 12 m.
■ For lengths of refrigerant lines, see
page 35.
■ Refrigerant R410A may only be top-
ped up in a liquid state.
Danger
Direct contact with refrigerant
can cause skin damage.
Wear safety goggles and protec-
tive gloves when working on the
refrigerant circuit.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5604 692 GB
Service