Checking The Burner; Installing The Compact Thermal Module - Vaillant ecoTEC PLUS SERIES Installation And Maintenance Manual

7 Inspection and maintenance
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Fig. 7.4 Cleaning the integral condensation heat exchanger
• Dismantle the compact thermo module as described
under 7.2.1.
Caution!
Risk of damaging the primary heat exchanger!
Neither loosen nor retighten the four screws (1).
• Cleaning the heating spiral (3) of the integral conden-
sation heat exchanger (4) using regular vinegar. Rinse
with water. Water used to clean the main heat
exchanger will drain through the condensate trap.
• After a reaction time of approx. 20 minutes, rinse off
the dust particles using a powerful spray of water.
Avoid pointing the water jet directly at the insulating
surface (2) on the back of the heat exchanger.

7.2.3 Checking the burner

Fig. 7.5 Checking burner
The burner (1) is maintenance-free and needs no clean-
ing.
• Check the burner surface for damage, replace the
burner if necessary.
• After checking/replacing the burner, dismantle the
compact thermo module as described in Section 7.2.4.
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7.2.4 Installing the compact thermal module

2
Fig. 7.6 Replacing silicone gaskets
• Insert a new silicone gasket (1) in the burner door.
3
Caution!
The silicone gasket (1) in the burner door (Art.
No.: 981 046) must be always replaced during
4
maintenance and servicing.
4
5
6
7
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Fig. 7.7 Installing compact thermal module
• Insert the compact thermo module (9) in the integral
condensation heat exchanger (10).
• Tighten the four nuts (4) on the left/right sides until
the burner door fits closely and uniformly to the stop
surfaces.
• Insert the ignition circuit (5) the earth wire (6).
• Insert the cables (6) on the fan motor and the cable
(7) on the gas fitting.
Installation and maintenance manual ecoTEC
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