8
Preparing for commissioning and filling the heating system
Fill water
!
Please note
Unsuitable fill water increases
the level of deposits and corro-
sion and may lead to boiler dam-
age.
■ Flush the heating system thor-
oughly before filling.
■ Only use fill water of potable
quality.
■ An antifreeze additive suitable
for heating systems can be
added to the fill water. The anti-
freeze manufacturer must ver-
ify its suitability.
■ Fill and top-up water with a
water hardness in excess of
the following values must be
softened, e.g. with a small soft-
ening system for heating water.
Total permissible hardness of the fill and top-up water
Total heating
output
Specific system volume (Conversion rate 1 mol/m
3
= 100
ppm)
kW
< 20 l/kW
≥ 20 l/kW to
< 50 l/kW
≥ 50 l/kW
≤ 50
≤ 3.0 mol/m
3
≤ 2.0 mol/m
3
< 0.02 mol/m
3
> 50 to ≤ 200
≤ 2.0 mol/m
3
≤ 1.5 mol/m
3
< 0.02 mol/m
3
> 200 to ≤ 600
≤ 1.5 mol/m
3
≤ 0.02 mol/m
3
< 0.02 mol/m
3
> 600
< 0.02 mol/m
3
< 0.02 mol/m
3
< 0.02 mol/m
3
Only for commissioning with
Vitotronic 300, type GW2
Check that the high limit safety cut-out of
the control unit is not set higher than
110 °C; adjust to max. 110 °C if
required.
Safety equipment block for 72 to 96 kW
Commissioning, inspection, maintenance
Further details regarding the individual steps
5692 704 GB