6.
Check the gas connections for
soundness.
Danger
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
Note
Carry out this test on a cold system.
1.
Empty the system until a pressure
of "0" is displayed.
Note
To view the operating pressure,
turn rotary selectors "
tr
" and
"
tw
" counter clockwise to the end
stop.
Routine Servicing Instructions
(cont.)
65
Service Instructions
58
62
670
GB
Service
