Vaillant ecoMAX 613/2 E Service Manual download pdf (Page 51)

Parts replacement 9

Instructions for installation and servicing ecoMAX 51

9 Parts replacement

Ensure that ALL regulations are observed.

9.1 Safety instructions

The following safety instructions are to be followed

when installing replacement parts!

Important:

Before starting any maintenance work:

Isolate the mains electricity supply by dis-

connecting the plug at the socket outlet (if

there is only an isolating switch remove the fuse

from the switch).

• Turn off the gas supply at the gas service valve fitted

to the boiler.

• When removing any water carrying components ensure

that water is kept away from all electrical components.

• Always use new seals and O–rings when replacing parts.

• Always test for gas soundness and always carry out

functional checks after any service work and after

exchanging any gas carrying component.

• Always check earth continuity, polarity and resistance

to earth with a multimeter after any service work and

after exchanging any electrical component.

9.1.1 Initial preparation

• Turn off the boiler.

• Isolate the electrical supply to the boiler.

• Remove boiler bottom cover.

• Turn off the gas service valve.

• Turn off the boiler CH service valves.

• Turn off the cold water inlet service valve (ecoMAX 800).

• Remove front case

• Lower electronic control box.

• Release central heating water pressure by draining the

boiler from the drain points provided. (This needs only

to be carried out when detailed in these instructions).

• After installing replacement parts, recommission and

check boiler function as described in commissioning

section.

Note:

The boiler is fitted with a combustion analysis

test point. A suitable combustion analyser can

be connected at this point to establish the com-

bustion performance of the boiler.

9.1.2 Removal of burner assembly

• Remove screw and disconnect air inlet pipe.

• Disconnect gas supply from gas valve by undoing union.

• Disconnect HT lead and earth lead from spark electrode.

• Remove five nuts from burner manifold.

• Disconnect two electrical connections from fan and

gas valve.

• Pull forward complete burner, gas valve and fan assembly.

• Remove burner, gas valve and fan assembly from boiler.

9.2 Replacement of burner

Fig. 9.1 Replacing the burner

• Turn off boiler.

• Remove front casing.

• Lower control box.

• Remove burner, gas valve and fan assembly as pre-

viously detailed.

• Remove 4 screws (1) securing burner to burner manifold.

• Fit new burner to manifold using the new sealing gas-

ket supplied, ensuring that the notch in the burner ali-

gns with the burner viewing window.

• Reassemble in reverse order.

• Recommission boiler as detailed.

9.3 Replacement of fan

• Turn off boiler.

• Remove front casing.

• Lower control box.

• Remove burner, gas valve and fan assembly as pre-

viously detailed.

• Remove 4 screws (1).

• Separate gas valve and fan assembly from burner

manifold (2).

• Remove 2 screws (3) securing gas valve to fan.

• Fit gas valve to new fan using the new sealing gasket

supplied.

• Refit gas valve and fan assembly to burner manifold

using the new sealing gasket supplied. Equally tighten

the four screws (1) to ensure a good seal is made.

• Reassemble burner, gas valve and fan assembly in

reverse order.

• Recommission boiler as previously detailed.

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Vaillant ecoMAX 613/2 E Service Manual Page 51

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