dexPro DXO5LV User manual

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INSTRUCTION MANUAL
DXO5LV / DXU5LV
Delux vented water heaters

B
Introduction
Thank you for selecting our 5-litre Delux Vented water heater.
These instructions contain important information about commissioning, operating the device
and maintenance. To ensure your safety and that of others we suggest that you read these
installation and operating instructions before using the device for the first time. Please keep
the instructions and other documentation close to the device.
This device has been manufactured in accordance with the prescribed standards and
has been tested by the competent authorities. It has a Safety Certificate and a Certificate
of Electromagnetic Compatibility. The technical data for the product is displayed on
the label between the inlet and outlet pipes.
The appliance should be installed by qualified persons. All repair and maintenance work
on the device, for example the removal of limestone and water scale deposits, may only
be carried out by a qualified plumber/tradesperson.
These Delux Vented water heaters are ideal for use in light commercial or domestic
applications where supply to a single sink is required for light hand/dish washing. Its
modern design and the use of carefully selected materials and an improved manufacturing
process ensure high quality.
Complies with the basic safety standards set by European Directives
Failure to observe the instructions identified by this symbol may endanger
persons. Failure to observe the instruction identified by this symbol may lead to damage to
the heater.
Indicates an electrical hazard. Failure you to observe this symbol may endanger
persons. Failure to observe the instruction identified by this symbol may lead to damage to
the heater.
Read the manual
Faulty and/or electrical or electronic appliances that are disposed of must be
handed in at the relevant recycling centres set up for this purpose.
This appliance can be used by children aged from 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack of
experience and knowledge if they have been given supervision or instruction
concerning use of the appliance in a safe way and understand the hazards
involved.
Illustration
DXO5LV Over Sink
DXU5LV Under Sink
DXO5LV / DXU5LV DELUX VENTED WATER HEATERS
Connect supplied
flexi hoses to unit &
cold water supply
Cold Water Supply
C
A

Installation
The device should be installed in accordance with the drawing on the first page of the
user manual. Any other installation position may result in serious damage to the device.
Installation should take place as close as possible to a cold water connection. The product
should be protected from the effects of frost (for example in caravans, summer houses,
etc.). Depending on the model, the device may be installed above (DXO model) or
under (DXU model) the work top.
Frost
If there is the risk of frost in a room, the device should notbe installed in this room.
If, despite this advice, the device is installed in a room where there is a risk of
frost, the device should be emptied before the risk arises.
Wall mounting
Select the position of the heater and install the supplied bracket.
Ensure the spout will be positioned inline with the basin.
Connection to the water supply
(See illustration on page 2)
A/C = cold water inlet side (for filling) blue.
B= hot water outlet side (hot water demand) red.
The device is designed for use in non-pressure systems. This system allows water to be
drawn from a single discharge point. Never use a shut-off valve in the appliance’s outlet.
The connection pipes must be installed as shown in the drawing. If the incoming mains
water supply pressure exceeds 5 bars, a pressure reducing valve must be fitted in the
incoming cold supply pipe.
A vented tap fitting must be used for nonpressure installation.
It is important you are absolutely certain that the tap you want to connect
is vented. If any doubt, always consult your installer.
If a vented tap is not used, a build up of pressure could lead to significant
damage and thereby void the warranty!
Children shall not play with the appliance. Cleaning and user maintenance shall
not be made by children without supervision.
Statement of Conformity
This boiler complies with the following directives:
• 2006/95/EC Low Voltage Directive
• 2004/108/EC Electromagnetic Compatibility Directive (EMC)
• 2011/65/EC (RoHS II)
• 2009/125/EC Eco design
• (EC) No. 814/2013
The product also conforms to the following harmonised European standards:
• EN 55014-1:2006 + A1:2009 + A2:2011
• EN 55014-2:1997 + A1:2001 + A2:2008
• EN 61000-3-2:2006 + A1:2009 + A1:2009
• EN 61000-3-3:2013
• EN 62233:2008
• EN 50581:2012
• EN 60335-1:2012 + AII:2014
• EN 60335-2-21:2003 + A1:2005 + A2:2008
2. Mounting Instructions
Environment
This device is delivered in sturdy packaging in order to avoid damage during
transport. This packaging consists mainly of recyclable materials. We request that
you dispose of the packaging accordingly for recycling purposes.
Disposal of the appliance
Old appliances must not be disposed of in your household waste! Every
consumer is legally obliged to dispose of old appliances separately from their
household waste and to take them, for example, to a collection point in their local
communityor local district. Old electrical appliances will be accepted there free
of charge. This ensures that the old appliances are properly recycled and any
negative impacts on the environment are avoided. This is why electrical
appliances are marked with the symbol shown on the left.
DXO5LV / DXU5LV DELUX VENTED WATER HEATERS
180mm
Side View
320mm
Wall
Wall mount bracket
for over sink unit

Connection to the electricity supply
The electrical installation must be in line with the current I.E.E. wiring
regulations.
Connection should be to a 13a fused switched spur.
The appliance must be earthed.
All plumbing connections must be completed before making the electrical connections. Fill
the tank with water and turn on the tap, letting the water exit out from the tank until all the
air has been expelled out. You can turn the electricity on after the tank is full of water.
Ensure that the addition of this boiler will not overload the fuse protection in your
mains. Internal modifications to the product may cause problems if this work is
not carried out by authorized and qualified technical staff. The warranty only
applies if the product has not been modified in any way, i.e. subject to it being in
unchanged condition.
In order to avoid creating an unsafe situation by inappropriate resetting of
the maximum temperature safety device, this unit may not be powered via an
external switching device (a time switch for example) or connected to a circuit,
which is regularly switched on and off by the power supply company.
DXO5LV / DXU5LV DELUX VENTED WATER HEATERS
Technical specifications
5L vented boiler DXO5LV DXU5LV
Model Over-sink Under-sink
Wall mounting Vertical Vertical
Construction Open Open
Material Brass Brass
Distance, pipe to wall 85mm 85mm
Electric supply 230V, 50Hz 230V, 50Hz
Nominal capacity 2,0kW 2,0kW
Nominal volume 5,3L 5,3L
Total quantity of mixed water 9,1L 9,1L
Temperature range 35 - 75°C 35 - 75°C
Cable size 1,0mm 1,0mm
Maximum recommended water volume 5,0L/min 5,0L/min
Non-usage consumption/ day 0,32kWh 0,32kWh
Protection class I I
IP rating IP24 IP24
Dimensions (h x w x d) 274x185x421mm 274x185x421mm
Weight when empty 2,5kg 2,5kg
Water connection G1/2” G3/8”
Operating pressure 0MPa 0MPa

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.
During heating, the volume of the water in the device expands, causing a flow of water
(“expansion water“) from the low-pressure tap fitting. This is perfectly normal and no
preventive action needs to be taken. Further tightening will not prevent the flow of
expansion water. This may damage the hot water valve.
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!
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 +/- 32 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.
Max. temperature approx. 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
e
DXO5LV / DXU5LV DELUX VENTED WATER HEATERS

Guarantee and service policy
This product is guaranteed against faulty materials and manufacture from the date of
purchase for 2 years.
In the event of a faulty product firstly contact our customer services team who will guide
you through the process.
Do not uninstall or return the product before contacting deXpro customer services, such
action may void the warranty.
The standard warranty covers the supply of spare parts or at our sole discretion a
replacement product. On-site service costs are strictly exempt from the warranty.
The guarantee specifically excludes:
•Corrosion caused by incorrect maintenance or installation of the water heater.
•Damage caused by limescale build up.
•Consequential losses, including labour charges and damges to surroundings.
•Failure to maintain and install the water heater according to the instructions in this
manual.
INFORMATION FOR CORRECT DISPOSAL OF THE PRODUCT IN
ACCORDANCE WITH THE EUROPEAN DIRECTIVE 2002/96/E.
At the end of its working life this equipment must not be disposed of as household
waste. It must be taken to a local authority waste collection centre or to a dealer
providing this service. Disposing of electrical and electronic equipment separately
enables its components to be recovered and recycled to obtain significant
savings in energy and resources. In order to underline the duty to dispose of this
equipment separately, the product is marked with a crossed out dustbin.
Legionella Prevention
Do not use heated water as drinking water. After prolonged shutdown of the heater for
example during holidays, the heater should be fully heated up to the maximum
temperature and water flushed through the tank for at least one minute.
Trouble Shooting
DXO5LV / DXU5LV DELUX VENTED WATER HEATERS
The indicator lamp does
not light up
No voltage. Check fuse and socket.
Device has reached the set
temperature.
No need to do anything.
Water temperature not as
required
Thermostat set incorrectly. Change the setting of the
thermostat.
Too little / no water Water pressure too low. Check whether other cold water taps
have the same problem.
Stop valve not fully open. Open the stop valve.
No water. The device should be turned off as
soon as possible! Also see
”The device does not operate.“
Water lying below
the device
The device is leaking. Notify the place of purchase.
Water pipes are not
securely connected to the
device.
Check the water connections.
Tap drips when
heating up
Is normal due to the
expansion of heated water.
No need to do anything.
Bubbling noises in
the tank
Too much calcification. The device must be de-scaled
by an expert.
The leakage current
circuit breaker is triggered
Too many devices on the
safety group.
Remove some devices from the
group or look for an empty group.
The device does not
operate at all
If the device no longer operates, check whether the fuse or leak-
age current circuit-breaker has tripped. The hot water reservoir
is equipped with a maximum temperature switch to ensure your
safety. The device will automatically switch off if excessive heating
takes place. When this happens, switch off the appliance for a few
minutes by removing the plug from the power supply socket and
allow the appliance to cool. The appliance can be reconnected to
the mains power supply again after approx. 20 minutes.

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