11
!
Please note
The ingress of oxygen can result in system dam-
age as a consequence of oxygen corrosion.
Only use pump controlled pressure maintaining
systems that are sealed against corrosion. The
pressure maintaining systems must be protected
against oxygen ingress into the heating water.
Pump controlled pressure maintaining systems
with atmospheric deaeration through cyclical
pressure release bring about central post-venti-
lation of the heating system. They do not pro-
vide oxygen removal in the sense of corrosion
protection as described in Directive VDI 2035
Part 2.
Carry out all checks in accordance with the manufac-
turer's instructions. Limit pressure fluctuations to the
lowest possible differential. Cyclical pressure fluctua-
tions and more significant pressure differentials point
towards a system fault. Immediately remedy such
faults or other heating system components may be
damaged.
Checking the firm seating of electrical plug connections and cable grom-
mets
Checking the thermal insulation
Checking the water quality
Observe the instructions in chapter "Water quality
requirements".
Enter the amount of top-up water and the total hard-
ness of the feed and boiler water into the table.
Meter reading Fill and top-up water Total water volume Total hardness pH value Date
Feedwater Boiler water
m
3
m
3
m
3
°dH °dH
Commissioning, inspection, maintenance
Checking the expansion vessel and system… (cont.)
5692 701 GB
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