Vailant ecoTEC plus 937, Installation And Maintenance Instructions Manual, Page: 66 / 80

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Installation and maintenance instructions ecoTEC plus 937 0020031552_06
10.2 Replacing the burner
a
Danger!
Risk of personal injury and/or material
damage as a result of non-compliance with
the safety instructions.
Before replacing the component, comply
with the safety instructions in Chapter 10.1.
Dismantle the compact thermo module as described
under 8.2.1.
1
Fig. 10.1 Replacing the burner
Release the 4 screws ( 1 ) on burner, and remove the
burner.
Mount the new burner with a new gasket. The notch
in the burner must be aligned with the sight glass of
the burner.
Fit the compact thermo module as described under
8.2.4.
Fit a new burner door seal kit.
After completion of the work check the system for
gas leaks and carry out a function test (see Sec-
tion 8.8).
i
A new burner door seal kit must be fitted
every time the burner door is removed.
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10.3 Replacing the fan or the gas valve
a
Danger!
Risk of personal injury and/or material
damage as a result of non-compliance with
the safety instructions.
Before replacing the component, comply
with the safety instructions in Chapter 10.1.
Switch the combi boiler off.
Isolate the electrical supply from the combi boiler.
Remove the air intake pipe (Fig. 8.1, Pos.
3 ).
Loosen the gas supply pipe on the gas valve (Fig. 8.2,
Pos.
3 ).
1
3
2
4
Fig. 10.2 Removing the fan with gas fitting
Pull the plug ( 4 ) out of the gas valve.
Pull the plug ( 3 ) out of the fan.
Unscrew the three screws ( 2 ) out of the thermo-com-
pact module ( 1 ).
Remove the complete component group
"gas valve/fan".
5
Fig. 10.3 Gas valve/fan screwed joint
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10 Replacing components