Venting The Boiler - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Venting the boiler

B
Fig. 16
1. Note
Only carry out the following tasks with the control
unit switched off.
Close the shut-off valves on the heating water side.
2. Connect the supply hose to valve
3. Push the drain hose (supplied inside the appliance)
onto top valve and connect to a drain.
B
4. Open valves and
A B
sure (purge) until no sound of escaping air can be
heard and no more air bubbles are visible.
Note
Check the system pressure at the pressure gauge.
Do not exceed 1.5 bar (0.15 MPa).
.
A
and vent at mains pres-
Commissioning, inspection, maintenance
A
5. First close valve .
B
6. When the required operating pressure has been
built, close valve . Open the shut-off valves on
A
the heating water side.
7. Remove the drain hose from top valve
Store the drain hose outside the boiler.
again.
B
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