Condensate Drain; Power Supply - Stiebel Eltron WWS 20 Manuel D'utilisation Et Installation

INSTALLATION
Installation
Heating the DHW cylinder via the inlet pipe
- The DHW cylinder must have a G1 hot water connector with a
male thread at top centre.
- The inlet pipe must protrude down to the lower third of the
DHW cylinder.
- Installing the inlet pipe cannot be influenced by any integral
indirect coils or threaded immersion heaters.
- To prevent thermal DHW circulation, you should install a
gravity brake between the appliance and the DHW cylinder.
- Pressure drop from the pipework and inlet pipe must not
exceed the residual head of the appliance circulation pump
(pressure drop from inlet pipe = approx. 16 hPa).
- The minimum distance from the DHW connector to the ceiling
of the installation room must be at least 65 cm. Otherwise
the cylinder must be tipped in order to insert the inlet pipe.
Heating the DHW cylinder via inlet connectors on the sides
- The connection to the appliance must be on the side about
half way up the DHW cylinder.
- To prevent thermal DHW circulation, you should install a
gravity brake between the appliance and the DHW cylinder.
- Pressure drops from the pipework must not exceed the resid-
ual head of the appliance circulation pump.
Heating the DHW cylinder via the integral smooth tube indirect
coil
- To comply with heating system regulations, the appliance
and DHW cylinder must be connected with a diaphragm ex-
pansion vessel and a safety valve.
- The indirect coil must have a transfer area of min. 1.4 m
- The thermal output of the appliance must be able to be
transferred via the indirect coil with a temperature differen-
tial (flow/return) of 5 K.
- Pressure drops from the pipework and smooth tube indirect
coil must not exceed the residual head of the appliance circu-
lation pump.
- The integral circulation pump is set at the factory to stage 2
with the corresponding available residual head and the ac-
companying rated output data (see chapter "Specification /
Data table").
The circulation pump is located under the appliance casing
and can be set to max. stage 3 (residual head 1.0 m).
For information on how to open the appliance casing, see the
chapter "Installation / Maintenance and cleaning".
Note
At a temperature differential of 5 K between the flow and
return, the thermal output of the heat pump (see chapter
"Specification") must be transferred via the indirect coil
in the DHW cylinder.
Due to the additional heat transfer, this installation may
result in different and lower output and efficiency data.

10.4 Condensate drain

Cooling the intake air in the evaporator separates the condensate.
Depending on the volume and humidity of the intake air, up to
0.3 l/h of condensate may form.
54 | WWS 20
f Route the condensate drain away from the heat pump along f
the rear of the appliance.
f Make sure that the condensate can drain off freely. f
f Use a suitable condensate pump if there is insufficient fall. f
Take the building characteristics into account.
Material losses
!
Do not permanently connect the condensate drain to the
drainage system.
Ammonia vapours rising from the drains can damage the
heat exchanger fins as well as other components.
f Install a funnel with a stench trap on the condensate f
drain.

10.5 Power supply

WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
If the appliance is permanently connected to the power
supply, ensure that the appliance can be separated from
the power supply by an isolator that disconnects all poles
with at least 3 mm contact separation. Contactors, mains
isolators or fuses can be used for this.
WARNING Electrocution
f Observe the safety measures to prevent contact f
with dangerous 'live' currents.
2
.
WARNING Electrocution
Coming into contact with 'live' components presents a
threat to life. Disconnect the appliance from the power
supply before carrying out work on the control panel.
Prevent the power supply from being switched on while
you are working on the system.
WARNING Electrocution
Insufficient earthing can lead to electrocution. Ensure
the appliance is earthed according to locally applicable
requirements.
WARNING Electrocution
In the event of damage to the power cable this must
always be replaced by a qualified contractor authorised
by the manufacturer, using original spare parts.
Material losses
!
The specified voltage must match the mains voltage. Ob-
serve the type plate.
Material losses
!
Never connect the appliance to the power supply before
the DHW cylinder is filled.
10.5.1 Power supply
The appliance is delivered with a power cable with a standard
plug.
www.stiebel-eltron.com