6. Check the gas connections for
soundness.
Gefahr
Escaping gas leads to a risk
of explosion.
Check all fittings for sound-
ness.
Check primary and secondary connections for leaks
Checking diaphragm expansion vessel and system pressure
Hinweis
Carry out this test on a cold system.
1. Empty the system until a pressure
of „0“ is displayed.
Hinweis
To view the operating pressure,
turn rotary selectors „tr“ and
„tw“ counter clockwise to the end
stop.
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