Viessmann VITODENS 222-F Installation And Service Instructions Manual page 44

Commissioning, inspection, maintenance
Checking the condensate drain and cleaning the...
1.
3.
Fig. 37
1. Pivot the HMU heat management unit forwards.
2. Remove the supply hose.
3. Undo hose clip and pull off drain hose.
4. Release trap from retaining clip.
Hold trap as straight as possible and remove.
Ensure that no condensate runs out.
5. Clean the trap.
6. Refit the trap.
7. Refit the hoses. Secure the drain hose with the
hose clip.
44
2.
4.
8. Check that connections on the trap and the heat
exchanger are seated correctly.
Note
Route the drain hose without any bends and with a
constant fall.
9. Flush the heating surface again with min. 0.3 l of
water. This will also fill the trap with water.
!
(cont.)
Please note
If the trap is not filled with water, flue gas
can escape.
Only start the appliance when the trap has
been filled.