10
EN
WARNING!
The installation of any shut-off or non-
return fittings between the pressure relief valve and
the water heater, as well as blocking the side ope-
ning of the pressure relief valve and/or locking its
lever is prohibited!
A drainage system to remove any water that may
drip from the side opening of the pressure relief valve
is recommended. The drain line must be designed
with a constant downward slope in a frost-free en-
vironment and must remain open. After connecting
the water heater to the water supply, fill the tank
with water. The sequence of steps to be performed is:
• Fully open the hot water tap of the most distant
mixing tap.
• Open the shut-off valve. (Table 1, No. 4)
• Wait until the air is released from the system
and a strong jet of water flows from the mixer
tap. Let the water run for about 30 seconds.
• Close the hot water tap of the mixer tap.
• Lift the small lever of the pressure relief valve
(Table 1, No. 5), wait 30-60 seconds until a
strong stream of water flows out of the side
opening of the valve.
• Loosen the valve lever.
WARNING!
If no water or only a thin stream of
water flows out of the valve opening, this indicates a
malfunction. A possible contamination of the water
pipe might be present. The fault must be eliminated
before the unit is put into operation.
WARNING!
The combined check and pressure relief
valve is one of the protective devices that ensure
the safe operation of the water heater. The use of
the water heater with a damaged or removed/unas-
sembled combined check and pressure relief valve
(safety valve) is STRICTLY PROHIBITED!
The pressure relief valve can also be used to drain
the water from the tank if desired. In such case, pro-
ceed as follows:
• Disconnect the water heater from any live
electrical wiring.
• Disconnect the cold-water inlet.
• Open the hot water tap of the mixing tap or
disconnect the hot water pipe (return pipe) of
the water heater.
• Lift the small lever of the pressure relief valve
(Table 1, No. 5) and wait until no more water
leaves the valve.
WARNING!
The running water can be hot – risk
of scalding. These steps do not ensure complete
drainage of the water tank.
IMPORTANT!
When emptying the water tank, con-
sider all necessary precautions to avoid damage
caused by the drained water.
IMPORTANT!
In Denmark, Sweden, Norway and
Finland, the connection of the water heater to the
public water supply may only be performed using
a suitable pressure reducing valve. The local regu-
lations must be observed.
Electrical connection
WARNING!
Any electrical connection may only be
performed when the water heater is filled with water.
IMPORTANT!
The water heater is powered by di-
rect current. The water heater is protected against
electric shock „class III“ and may only be supplied
with safety extra-low voltage (SELV). Only power
sources recommended by the manufacturer may
be connected. A faulty and/or unsuitable power
supply involves a high risk and is likely to cause an
accident. The connection cables of the device must
be replaced if they are damaged.
IMPORTANT!
Photovoltaic modules may
ONLY
be connected in
parallel
. When connecting more
than one photovoltaic module, always use a sui-
table connector for parallel connection. For more
information, refer to the illustration „Parallel PV-
Connector“. Connecting photovoltaic modules in
series will damage the water heater.