Replacing The Gas Valve; Replacing The Burner - Vaillant ECOTEC PLUS VU 80 Installation And Maintenance Instructions Manual

> Slide the side section to the rear.
> Secure the side section using two screws in the front
lower area and in the upper central area.
> Fit the upper casing (¬ section 13.4).
> Fold up the electronics box.
15.3

Replacing the gas valve

2
2
15.2 Replacing the gas valve
> Remove the gas pipe (1) from the gas valve.
> Unscrew the screws (2) from the fan and remove the gas
valve from the fan.
> Replace the defective component.
ecoTEC plus installation and maintenance instructions 0020134823_01
806/5-5
1006/5-5
1206/5-5
Replacing components
> Fit the new gas valve in the same position on the fan as
before. Use new seals for this.
> Tighten the screws (1) in a cross-wise pattern.
Torque (only for VU GB 806/5-5 and
VU GB 1006/5-5): 6 Nm
Torque (only for VU GB 1206/5-5): 10 Nm
> Connect the gas pipe (1) with a new seal to the gas valve.
Torque (only for VU GB 806/5-5): 2 Nm
Torque (only for VU GB 1006/5-5 and
VU GB 1206/5-5): 2.8 Nm
> After installing the new gas valve, carry out a leak-tight-
ness test (check product function and tightness) (¬ sec-
tion 13.5.9) and a gas ratio setting (¬ section 13.1.4).
15.4

Replacing the burner

> Remove the gas-air mixture unit (¬ section 13.5.1).
1
1
2
3
4
15.3 Replace the burner (example: VU GB 806/5 - 5)
1 > Remove the ignition and monitoring electrode.
> Remove the seal (4) from the burner door.
> Turn the insulation protection plate (1) to remove it.
> Remove the insulating mat (2).
> Loosen the nuts (3) on the burner.
VU GB 806/5-5: three nuts
VU GB 1006/5-5 and VU GB 1206/5-5: four nuts
> On the VU GB 1006/5-5 and VU GB 1206/5-5 only:
Use a suitable socket (with extension) to ensure that the
burner mat does not become damaged. You must not
use burners that have a damaged mat.
> Remove the burner. When doing so, hold the fan and the
burner door securely.
> Fit the new burner with a new seal.
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