Wahl Bach UTS10, User Manual

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During heating, the volume of the water in the device expands, causing a flow of water
(„expansion water“) from the safety unit. This is perfectly normal and no preventive ac-
tion needs to be taken.
Frost
When the device has not been used for an extended period,
it must be protected against the effects of frost. Leave the
power supply on and set the thermostat knob to „ “. When
set to this position, the device maintains the water tempera-
ture at approximately 7°C. If the device is to be disconnected
from the power supply, it must be emptied completely in
order to avoid the risk of damage caused by freezing.
4. MAINTENANCE
This device does not require any maintenance by the user.
Professional maintenance should always be carried out by an
expert.
An anti-splash device is placed in the cold water pipe, which means that only very little
mixing will take place between the cold and hot water in the device. After water has been
consumed, the electric element will switch on again and within a few minutes the device
will be heated up again.
As water expands when heated, the pressure will increase in the device vessel with the
connected hot water pipe(s). In order to limit this increase in pressure, a safety unit is
required. This is a combination of a check valve, which prevents hot boiler water from
flowing into the cold supply pipe, with a relief valve that limits the pressure in the device
to a maximum of 8 bar, and a Stop valve in front of the check valve in order to be able to
disconnect the device from the water mains.
The relief valve is provided with a discharge hose for discharging expansion water from
the device to the sewer.
The steel storage vessel is provided with an enamelled layer that prevents the formation
of corrosion. In case of damage to the enamelled layer, a magnesium anode mounted in
the storage vessel will make sure that the underlying steel is protected.
The magnesium anode protects the tank against corrosion. This is a cathodic process,
during which the anode slowly dissolves. The anode should therefore be inspected, and
replaced if necessary, by a recognized fitter every 2 years.
Check the functioning of the inlet combination by turning the large knob on the inlet
combination once a year, allowing water to flow out, and closing it immediately. This will
prevent the valve of the inlet combination from getting stuck. Also check the drain for
blockages. If it is blocked, unblock the drain or instruct a third party to do this.