Vaillant ecoMAX 613/2 E Service Manual download pdf (Page 42)

7 Servicing

Instructions for installation and servicing ecoMAX42

Fig. 7.1 Removing the compact thermal module

Remove burner assembly

• Remove screw (1) and disconnect air inlet pipe (2).

• Disconnect gas supply from gas valve by undoing

union (4).

Fig. 7.2 Disconnecting gas supply from the gas valve assembly

• Disconnect HT lead and earth lead (3) from spark elec-

trode.

• Remove five nuts (7) from burner manifold.

• Pull forward complete burner, gas valve and fan

assembly.

• Disconnect two electrical connections (5 and 6) from

fan and gas valve.

• Remove burner, gas valve and fan assembly (8) from

boiler (9).

Note:

The compact thermal module may be very hot

and care should be taken when removing the

module. The compact thermal module must not

be suspended from the corrugated gas tube.

Important:

Under no circumstances should the venturi tube

be removed and dismantled from the gas valve

as this part is sealed and gas checked during

production.

Fig. 7.3 Renewing the seals (1) and checking the burner flange

insulation (2)

7.2.2 Inspect main heat exchanger

With the burner and fan assembly removed it is now

possible to inspect the main heat exchanger.

Remove any loose deposits from the heat exchanger

using a soft brush and jet of water (ensure that water is

kept away from all electrical components.

Any water used to clean the main heat exchanger will

drain through the condensate trap).

Fig. 7.4 Inspecting the main heat exchanger

7.2.3 Inspect burner

• Visually inspect burner for signs of damage or deterio-

ration.

• Ensure a gap of 4 mm exists between the spark elec-

trode and earth probe.

• Check that the burner manifold sealing gasket is in

good condition.

• The burner is maintenance–free and does not require

cleaning. The burner must be replaced if its outer sur-

face shows any signs of damage (fig. 7.5).

Fig. 7.5 Inspecting the burner

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Vaillant ecoMAX 613/2 E Service Manual Page 42

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