45
Total permissible hardness of the fill and top-up water
Total heating output
Specific system volume
kW
< 20 l/kW
≥
20 l/kW to < 50 l/kW
≥
50 l/kW
≤
50
≤
3.0 mol/m
3
(16.8 °dH)
≤
2.0 mol/m
3
(11.2 °dH)
< 0.02 mol/m
3
(0.11 °dH)
>
50 to
≤
200
≤
2.0 mol/m
3
(11.2 °dH)
≤
1.5 mol/m
3
(8.4 °dH)
< 0.02 mol/m
3
(0.11 °dH)
>
200 to
≤
600
≤
1.5 mol/m
3
(8.4 °dH)
≤
0.02 mol/m
3
(0.11 °dH)
< 0.02 mol/m
3
(0.11 °dH)
>
600
< 0.02 mol/m
3
(0.11 °dH)
< 0.02 mol/m
3
(0.11 °dH)
< 0.02 mol/m
3
(0.11 °dH)
Danger
Escaping heating water and hot steam can
cause serious injury and damage to the heating
system.
Open flush & vent valves only when the heating
system is cold.
Filling the secondary circuit
Before filling the secondary circuit
Fit on-site quick-action air vent valves at the highest
point of the heating water buffer cylinder and heating
return
F
.
A
B
F
C
D
E
H
K
G
Fig. 36
0
1.
Check whether the venting screws on the two
quick-action air vent valves are open (heating
water buffer cylinder and heating return).
0
2.
Check whether gas shut-off valve
A
is closed.
0
3.
Check whether shut-off valves
C
and
G
on the
heating water side are closed.
0
4.
Open shut-off valves
E
and
K
on the heating
water side.
0
5.
Connect the fill hose to fill valve
H
.
0
6.
Connect the drain hose to drain valve
D
and link
it to a drain outlet.
0
7.
Fill water in via fill valve
H
, until the fill water run-
ning from drain valve
D
is free of bubbles.
0
8.
When the fill water runs out free of bubbles, open
shut-off valve
C
on the heating water side.
0
9.
Close shut-off valve
E
on the heating water side.
10.
Continue to fill with water via fill valve
H
, until the
heating water buffer cylinder is completely full and
no more air escapes from the quick-action air vent
valve on the heating water buffer cylinder.
11.
On the heating water side, open shut-off valve
G
and close shut-off valve
C
.
Commissioning, inspection, maintenance
Filling the secondary circuit
(cont.)
5839343
Summary of Contents for E00T
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