Vent The Boiler At The Safety Equipment Block (Accessory) - Viessmann VITORONDENS 200-T Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
With safety equipment block (accessory)

Vent the boiler at the safety equipment block (accessory)

8
(cont.)
1. Check the pre-charge pressure of the
diaphragm expansion vessel.
2. Close the bypass valve on the KV/KR
distributor.
3. Remove front insulation shell A.
4. Open air vent valve B.
5. Fill the system via the boiler fill
valve C in the heating return. (Mini-
mum system pressure 0.8 bar).
6. Close air vent valve B when no
more air escapes.
7. Close boiler fill valve C.
8. Open the bypass valve on the KV/KR
distributor again.
1. Close the shut-off valves on the heat-
ing water side.
2. Remove front insulation shell A (if
already fitted).
3. Connect the drain hose on air vent
valve B with a drain.
4. Open valves B and C and vent
using mains pressure until no more
air noise can be heard.
5. Close valves B and C, and open
the shut-off valves on the heating
water side.