Siting The Appliance; Water Connection - STIEBEL ELTRON WWS 20 Bedienung Und Installation

INSTALLATION
Installation
1 Anti-vibration mount
2 Support points for anti-vibration mounts
f Fit the anti-vibration mounts onto the appliance support f
points provided on the wall mounting bracket rails.
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Have a qualified contractor check the installation to en-
sure that the appliance is permanently and securely in-
stalled.

10.2 Siting the appliance

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The appliance must be positioned horizontally to prevent
damage.
f Position the appliance on a horizontal and even sub- f
strate.
f When fixing to a wall mounting bracket, ensure that f
the rail supports are aligned horizontally.
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Take note of the appliance's weight and centre of gravity.
f Position the appliance in the final installation site. f
f When fixing to a wall mounting bracket, the depressions on f
the device underside must be positioned on the anti-vibra-
tion mounts on the bracket.
f Attach the fully wired junction box underneath the appliance f
between the wall mounting brackets.

10.3 Water connection

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Carry out all water connection and installation work in
accordance with regulations.
52 | WWS 20
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The water must be treated, as appropriate to the temper-
ature and hardness of the water. The appliance must be
descaled regularly as required.
1
f Observe the details specified in the chapter "Installa- f
tion / Descaling the appliance".
2
Note
Generally, heat pumps should always have flexible
connections. Aim to avoid the transmission of struc-
ture-borne sound when installing pipes.
Note
The length of the pipework between the appliance and
the DHW cylinder should be as short as possible. If the
pipework between the appliance and the DHW cylinder
is longer, the output and efficiency data may fall.
The following material combinations are approved for metal pipe-
work installations:
Cold water inlet
Copper pipe
Steel pipe
f Thoroughly flush the pipework before connecting the ap- f
pliance. Foreign bodies, such as welding pearls, rust, sand
or sealant can impair the operational reliability of the
appliance.
Safety valve
The appliance has been designed to connect to a closed DHW
cylinder. Provide the appliance with a pressure relief valve.
f Install a type-tested safety valve in the cold water supply f
line. The response pressure of the safety valve must be below
or equal to the permissible operating pressure of the DHW
cylinder.
The safety valve protects the appliance against unacceptable ex-
cess pressure. The diameter of the cold water supply line must be
no greater than the diameter of the safety valve.
- Ensure that the expansion water escaping from the safety
valve can drip into a drain, e.g. a tank or funnel.
- Ensure the drain cannot be shut off.
- Size the drain so that water can drain off unimpeded when
the safety valve is fully opened.
- Ensure that the discharge pipe of the safety valve is open to
atmosphere.
- Fit the discharge pipe of the safety valve with a constant
downward slope and in a room free from the risk of frost.
Pressure reducing valve
The maximum pressure in the cold water supply line must be at
least 20 % below the response pressure of the safety valve. If the
maximum pressure in the cold water supply line is higher, install
a pressure reducing valve.
Drain valve
f Install a suitable drain valve at the lowest point in the cold f
water inlet line.
DHW outlet
Copper pipe
Steel pipe or copper pipe
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