dexPro DXU10SS, Instruction Manual, Page: 6 / 9

DXU10SS DELUX STAINLESS STEEL
User Instructions
The heater must be filled with water before connection to the electrical supply.
When powering up for the first time, you must verify that the temperature
indicator (light) extinguishes when the required temperature is reached.
The heater only switches on again if the temperature falls below this setting.
(See troubleshooting)
When filling for the first time, the hot water valve in the low-pressure tap fitting
must be open so that water can flow into the device. If the device is not filled with
water beforehand during installation, the automatic safety device will activate
and switch off the appliance. (See troubleshooting instructions on how to act in
the event of a fault).
Temperature setting
Cold; heater is switched off.
Automatic frost protection active; the device
switches on if the water temperature falls
below 7 C.
Water temperature has risen by approx 25°C.
Energy-saver mode/reduced energy
consumption: Greater energy savings are possible
if the water temperature is set to a maximum of
+/- 55 C. This also reduces the risk of damage to
the device.
Water temperature is +/- 75°C.
Operating the unit at a lower temperature can reduce scaling, save energy and reduce the
risk of scalding.
To use the device, simply select the desired temperature setting from the listed options.
Once a setting is selected the indicator light will illuminate to signal the element is heating
the stored water to the desired temperature. When the light extinguishes the temperature
setting has been achieved. When reducing the temperature setting of the heater, it will
not take effect until the water has cooled below the new temperature set point.
e
Usage and Maintenance
Please refer to the previous section for details of the thermostat settings. We recommend
you use position “E“ as this guarantees maximum energy efficiency by maintaining the
water temperature at approximately 55
°
C; furthermore lime scale build-up and heat loss
are much lower than at higher temperatures.
Operation of the device is indicated by the indicator light, which lights up when the device
is on and extinguishes when the set temperature is reached or the device is turned off.
For vented systems, during heating, the volume of the water in the device
expands, causing a flow of water (“expansion water“) from the from vented tap.
The tap will naturally drip during its heating cycle. This is perfectly normal and no
preventive action needs to be taken. Further tightening the tap handle will not
prevent the flow of expansion water. This may damage the tap.
Frost
When the device has not been used for a couple of months, 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 temperature
at approximately 7
°
C. If you will not use the device for more than half a year,
unplug it, disconnect it from the water supply and empty it. To that end, hold the
device with the connection hoses upwards. Remove the connection hoses. Then
hold the device, with the connections pointing downwards, over a sink. Caution:
the boiler will release 5 litres of water.
Maintenance
This heater does not require any maintenance by the user. Professional
maintenance should always be carried out by an expert.
If faulty, never try to repair the heater yourself. Please contact the nearest service
specialist or the party that supplied the appliance originally.
De-scaling
service inspection should be performed by authorized and qualified technical staff every
year. De-scaling of the device during this inspection is highly recommended, especially
when you live in an area with hard water exceeding 12
°
dH (German standard of
hardness). Higher water temperature will intensify calcification. It is therefore recommend-
ed to set the device at maximum 55
°
C (energy-saving setting) in areas with extremely
hard water >16
°
dH.
Cleaning
The housing of the device can simply be cleaned with a damp cloth. Do not use aggressive
cleaners or cleaners with a scouring effect!
e
*
*