Starting Up/Decommissioning 5; Purging The Unit; Fitting The Unit Cladding - Vaillant VED Operating And Installation Instructions

5 Starting up/decommissioning
5.1

Purging the unit

b
Caution.
Risk of damage from heating wire dry fire.
The unit must be purged every time it is
started up. Otherwise, there is a risk of dry
fire and, as a consequence, damage to the
unit.
> Ensure that the unit is de-energised every
time the unit is started up or decommis-
sioned.
> Check that there is no voltage in the supply
lines and connections.
> Ensure that the power cannot be restored
inadvertently to any of the supply lines and
connections while you are working on the
unit.
To start up the unit, proceed as follows:
> De-energise the unit.
> Open the cold water stop valve.
> Close and open the hot water draw-off valve several
times. The unit will then be purged. In normal operat-
ing mode, the unit will not need to be purged again.
Fig. 5.1 Safety switch
> Push the safety switch (1) in, as shown in figure 5.1.
Installation instructions for VED electric instantaneous water heater 0020149586_00

Starting up/decommissioning 5

5.2

Fitting the unit cladding

3
Fig. 5.2 Fitting the unit cladding
> Put the unit cladding (3) on.
> Tighten both bolts (2).
> Grip the panel (1) using the two straps.
> Splay the two straps (slightly pull the panel apart).
> Put the panel (1) on.
> Make sure that the hot water draw-off valve is closed.
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2
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