Venting The Boiler By Flushing; Selecting The Language (If Required) - Only For Weather-Compensated Control Units - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Filling the heating system
Total permissible hardness of the fill and top-up water
Total heating output
kW
50
≤
50 to 200
> ≤
200 to 600
> ≤
600
>
Fig.18

Venting the boiler by flushing

B
Fig.19
Selecting the language (if required) - only for weather-compensated control
units
At the commissioning stage, the display is in German
(factory setting).
(cont.)
Specific system volume
< 20 l/kW
3
3.0 mol/m (16.8 °dH)
≤
2.0 mol/m 3 (11.2 °dH)
≤
1.5 mol/m 3 (8.4 °dH)
≤
3
< 0.02 mol/m (0.11 °dH)
A
A
Commissioning, inspection, maintenance
20 l/kW to < 50 l/kW
≥
3
2.0 mol/m (11.2 °dH)
≤
1.5 mol/m 3 (8.4 °dH)
≤
0.02 mol/m 3 (0.11 °dH)
≤
3
< 0.02 mol/m (0.11 °dH)
1. Check the pre-charge pressure of the diaphragm
expansion vessel.
2. Close the gas shut-off valve.
3. Fill the heating system via boiler drain & fill
valve . System pressure
A
4. Close boiler drain & fill valve
1. Close the shut-off valves on the heating water side.
2. Connect the drain hose to boiler drain & fill valve
B .
3. Open valves and
A
sure until no more air noise can be heard.
4. Close taps
A and B
the heating water side.
50 l/kW
≥
3
< 0.02 mol/m (0.11 °dH)
< 0.02 mol/m 3 (0.11 °dH)
< 0.02 mol/m 3 (0.11 °dH)
3
< 0.02 mol/m (0.11 °dH)
1.0 bar (0.1 MPa).
>
.
A
. Vent under mains pres-
B
; open the shut-off valves on
27