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Vaillant VEN 6 plus Mode D'emploi page 14

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4 Installation
b
Caution!
Possible damage due to excessive water
pressure.
High water pressure may result in pressure
damage to water lines.
> Observe the installation instructions for the
low-pressure valve.
> Always fit the restrictor element before the
low-pressure valve is connected. The
restrictor element is included with the low-
pressure valve.
b
Caution!
Possible damage caused by leaking water
connections.
Leaks may occur due to strains in the line
material.
> Take care not to strain the lines as you
tighten the water connections.
The following water fittings can be connected:
Undercounter unit
- VNU 2 Standard for wash stand and sink,
order no. 302595
- VNU 2 Temperier Standard for wash stand and sink,
order no. 302596
Overcounter unit
- VNO 2 two-handle valve fitting, order no. 000423
- 250 mm swivel spout, order no. 000468
i
For a connected water pressure of over 5 bar,
we recommend that you fit a domestic pres-
sure regulator.
i
No hoses, aerators, nozzles or similar are per-
mitted to be fitted to the outlet of the valve
fitting.
i
A flow of 5 litres per minute must not be
exceeded.
> Fit the restrictor element in accordance with the
installation instructions supplied with the low-pres-
sure valve.
> Connect the low-pressure valve.
12
Operating instructions for electric domestic hot water cylinders VEN 5/6 U and O (plus) 0020129648_01
4.6
Filling the domestic hot water cylinder
Before initial start-up or after draining (e.g. due to risk
of frost, maintenance or work on the plumbing), you
must fill the electric domestic hot water cylinder with
water before you plug in the mains plug.
> Fill the electric domestic hot water cylinder with
water.
Keep the outlet open
As the electric domestic hot water cylinder heats up, the
water inside will expand and warm water will drip out of
the swivel spout.
> Keep the low-pressure valve with swivel spout open.
Do not connect a hose or aerator.
i
With the Vaillant low-pressure valve, open the
hot water tap with the cold water tap fully
closed until a uniform stream of water flows
out.
i
With the low-pressure thermostatic mixing
valve, turn the temperature selector to red as
far as it goes and open the tap until a uniform
stream of water flows out.

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