Vaillant VED E 8 INT Series, Operating Instructions Manual, Page: 42 / 236

6 Start-up
40
Installation instructions electronicVED 0020288451_00
–
Continuous current > 50 A
▶
Install the load-shedding relay in the L2
outer conductor.
▶
If the product is a replacement product,
also replace the load-shedding relay.
6 Start-up
6.1 Removing air pockets from the
product
Caution.
Risk of damage from heating
wire dry fire
Air pockets in the pipes may
lead to dry fire on the heating
wires during start-up.
▶
Draw off water using the
product to remove any air
pockets before starting up.
1. Disconnect the product from the power
supply.
2. Open the cold-water isolation valve in
the cold water pipe.
3. Open the domestic hot water isolation
valve for at least one minute.
4. Close and open the domestic hot water
draw-off valve several times.
Note
In normal operating mode,
the product will not need to be
purged again.
1
5. Press the safety switch (1) .
6.2 Fitting the product casing
E
C
A
D
X9
B
If the cable for the temperature selector
is not plugged into the electronics, the
electronics cannot regulate the power. The
outlet temperature is 30 °C.
▶
Refit the product casing as shown.