24
2.
If required, spray slightly acidic,
chloride-free cleaning agents based
on phosphoric acid (e.g. Antox 75 E)
onto heat exchanger
A
and let the
solution soak in for approx. 20 min.
3.
Thoroughly flush heat exchanger
A
with water.
4.
Install the burner and torque screws
diagonally with 12 Nm.
5.
Fit the gas supply pipe with a new
gasket. Torque fittings with 15 Nm.
6.
Check the gas connections for tight-
ness.
Danger
Escaping gas leads to a risk of
explosion.
Check all fittings for gas tight-
ness.
7.
Connect the electrical cables/leads to
each corresponding component.
Checking the condensate drain and cleaning the siphon
B C
A
1.
Remove retaining clip
A
and pull out
insert
B
.
2.
Clean siphon
C
and check that the
condensate can drain off freely.
3.
Fill siphon
C
with water and reas-
semble.
Note
Never twist the supply hose during
assembly.
Checking the diaphragm expansion vessel and system pressure
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 dia-
phragm expansion vessel is lower
than the static system pressure, top
up with nitrogen until the pre-charge
pressure is raised by 0.1 to 0.2 bar.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5692 843 GB
Summary of Contents for Vitodens 200 WB2C 45
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