Combustion Chamber And Heat Exchanger - Vaillant ecoTEC plus Instructions For Installation And Servicing

8 Inspection and maintenance
h Note!
• Do not disconnect at the gas valve.
• Remove the two gas pipe bracket securing
screws from underside of inner case, see fig 8.5.
• Drop down the electronics box into the service
position.
• Remove the four screws from the chassis
front, see fig 8.2.
• Remove the chassis front by pulling it out at
the top from its retaining slots.
Note!
h
When replacing chassis front panel ensure the
bottom fits behind lip.
1
2
3
4
5
Fig. 8.6 Fan, gas valve and burner
1 Electrode connector
2 Ignition lead
3 Fan
4 Electrical lead
5 Gas pipe bracket
6 Burner door
7 Combustion chamber burner door securing nuts (5 off)
8 Earth spade connector
9 Gas valve
10 Chassis front retaining slots
11 Gas valve electrical plug
• Disconnect the gas valve electrical plug at the gas valve.
• Disconnect the electrical leads from the fan.
• Remove the five combustion chamber burner door
securing nuts, these should be discarded and replaced
with the new nyloc nuts supplied in the burner door
seal kit.
• Gently remove the fan, gas valve and burner assembly
from the combustion chamber complete with the gas
pipe bracket and seal, see fig 8.6.
30
• Clean the burner with a soft brush taking great care
not to damage the front insulation. DO NOT use wire
or sharp instruments to clean the holes of the burner.
• Inspect the burner for any signs of damage.
• Remove and discard the burner door seal and replace
with new, see fig 8.7.
Removal of the burner is not necessary during a normal
service.
insulation
6
compact
thermal
7
module
8
9 gas valve
10
11
Fig. 8.7 Compact thermal module
h Note!
If the burner has to be removed it will require
a new gasket when refitted.
h Note!
When replacing ensure that the sealing grom-
met, situated below the gas valve is correctly
re-seated.
8.1.7

Combustion chamber and heat exchanger

insulation
heat exchanger
Fig. 8.8 Insulation
Instructions for installation and servicing ecoTEC plus / 0020020828_05
section through
burner door showing
position of seal
burner
door
seal
burner
fan