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9.7 Checking the diaphragm expansion vessels
1
26_04_01_0597_
1 Fill valve of the expansion vessel
Remove the protective caps from the fill valves on the expan-
sion vessels.
1
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1 Cap valve
Close the cap valve and depressurise the expansion vessel by
draining the cap valve.
Check the pre-charge pressure of the expansion vessel using
a pressure gauge.
Reopen the cap valve.
Refit the protective caps on the fill valves.
Reassemble the appliance in reverse order, i.e. fit the l.h.
front panel and cover.
After the appliance has been fully closed again, restore the
power supply.
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