Viessmann B1KE Combi Series Installation And Service Instructions Manual page 43

Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Filling the Heating System
C
C
Valves/fittings on site:
A Gas shut-off valve
B Heating return with fill valve
C Heating supply with drain valve
D ON/OFF switch
(continued)
D
A
B
A
B
1. Check the pre-charge pressure of the expansion tank.
2. Close gas shut-off valve A.
3. Fill the heating system at boiler fill valve B
in the heating return (on site). Minimum system
pressure > 12 psi (0.8 bar). Check the system
pressure at pressure gauge. The indicator must be in
the green band. If necessary, open the system air
vents.
Note: Pressure spikes may occur during filling,
ensure pressure does not exceed pressure relief
valve rating.
4. Fit hose to drain valve C. Route the hose into a
suitable container or drain outlet.
5. Close the shut-off valves on the heating water side.
6. Open drain valve C and fill valve B in the heating
return. Vent (flush) until no more air noise is audible.
Note: Required minimum flow rate for flushing:
800 L/h for B1HE/KE 85/120 boilers; 1100 L/h
for B1HE/KE 150/199 boilers
7. Activate the filling function (see commissioning
assistant or following chapter).
8. Close drain valve C and fill valve B.
Check the system pressure at pressure gauge.
The indicator must be in the green band.
9. Open the shut-off valves on the heating water side.
Activating the filling function
If the filling function is to be activated after commissioning.
Tap the following buttons:
1. and OK simultaneously for approx. 4 sec, then release.
2. Use to select "Basic settings".
3. OK
4. Use to select "Commissioning assistant".
5. OK
6. for "Next" and OK until "Filling" appears.
7. OK
The filling function ends automatically after 20 min
or when you tap OK.
Commissioning
43