Checking the condensate drain and cleaning the siphon
1.
Check that the condensate can
drain freely at the siphon.
2.
Remove retaining clip
A
and
siphon
B
.
3.
Clean siphon
B
.
4.
Fill siphon
B
with water and fit it to
the boiler. Position retaining clip
A
.
Checking the diaphragm expansion vessel and system pres-
sure
Note
Carry out this test on a cold system.
1.
Drain the system or close the cap
valve on the diaphragm expansion
vessel and reduce the pressure
until the pressure gauge indicates
"0".
2.
If the pre-charge pressure of the
diaphragm expansion vessel is
lower than the static system pres-
sure, top up with nitrogen until the
pre-charge pressure is raised by
0.1 to 0.2 bar.
3.
Top up your heating system with
water and vent until the filling pres-
sure of a cooled system is 0.1 to
0.2 bar higher than the pre-charge
pressure of the diaphragm expan-
sion vessel.
Permiss. operating pressure: 3 bar
Further details regarding the individual steps
(cont.)
21
Commissioning, inspection, maintenance
5692
673
GB
Содержание VITODENS 300-W
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