Cleaning The Heat Exchanger; Checking The Burner - Vaillant ecotec plus Installation And Maintenance Instructions Manual

8 Inspection and maintenance
Caution!
a
Damage to gas supply!
Under no circumstance may the compact
thermal module dangle on the flexible
corrugated gas pipe.
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Fig. 8.3 Dismounting compact thermal module
• Remove the two plugs for the ignition (5) and ground
connections (6) from the ignition electrode.
• Remove the plugs (3) at the fan motor and the
cable (4) at the gas valve.
• Undo the five nuts (7).
• Pull off the entire compact thermal module (2) from
the heat exchanger (1).
• After dismounting check the burner and heat
exchanger for damage and soiling – clean the
components if necessary as described below.
• Check the insulating layer at the burner door. If signs
of damage are apparent it must be renewed (Item
No. 210734).

8.3.2 Cleaning the heat exchanger

Caution!
a
Danger of short-circuiting and irrepairable
damage to the PCB and fan!
Protect the downfolded electronic box and also
the fan against splash water.
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Fig. 8.4 Cleaning the heat exchanger
• Dismount the compact thermal module as described
under 8.3.1.
• Clean the heating coil (2) of the heat exchanger (3)
using commercially-available essence of vinegar. Flush
with water. The water flows out of the heat exchanger
through the condensate siphon. You can also clean the
condensate trap via the opening (4).
• Allow the cleaning agent to take effect for
approximately 20 minutes then rinse off the loose dirt
with a powerful water jet. Avoid pointing the water jet
directly at the insulating mat (1) at the rear of the
heat exchanger.
You can also use a plastic brush to carry out the
cleaning.

8.3.3 Checking the burner

Fig. 8.5 Checking the burner
The burner (2) is maintenance-free and needs no
cleaning.
• Check the surface of the burner for damage, replace
the burner if necessary.
• After checking/repairing the burner install the com-
pact thermal module as described in Chapter 8.3.4.
Installation and maintenance instructions ecoTEC plus 0020214490_00
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