Page 1
MW & EW 10 & 15 Litre Unvented Water Heaters
HANDBOOK
IMPORTANT:
This booklet should be given to the customer
after installation and demonstration.
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Page 3
62
Pursuant to Art. 26 of Italian Legislative Decree 14 march 2014, n. 49 “Enactment of Directive 2012/19/EU governing
electrical and electronic waste (WEEE)”
The barred bin symbol on the appliance and its packaging indicates that the product must be scrapped separately from other waste
at the end of its service life. The user must therefore hand the equipment over to a sorted waste disposal facility for electro-technical
and electronic equipment at the end of its service life.
Alternatively , he ma y return the equipment to the retailer at the time of purchase of a new equiv alent type of appliance. Electronic equipment of size
less than 25 cm can be handed over to any electronics equipment retailer whose sales area is at least 400 m2 for disposal free of
charge and without any obligation to purchase new product.
Sorted waste collection for recycling, treatment and environmentally compatible scrapping contributes to the prevention of damage to
the environment and promotes reuse/recycling.
3
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GENERAL SAFETY INSTRUCTIONS
CAUTION!
1. This manual is an integral part of the product. Keep it with
care with the appliance, and hand it on to the next user/o wner
in case of change of property.
2. Read the instructions and warning in this manual carefully,
they contain important information regarding safe
installation, use and maintenance.
3. The appliance must be installed and commissioned by a qualified
technician in accordance with local legislation and health and
safety regulations. All po w er circuits must be shut off before you
open the terminal block.
4. DO NOT use the appliance for any other than its specified use.
The manufacturer is not liab le for damage resulting from improper
or incorrect use or failure to observe the instructions given in
this manual.
5. Incorrect installation can result in damage to property and injury
to persons and animals; the manufacturer is not liable for the
consequences.
6. DO NOT leave the packaging materials (staples, plastic bags,
expanded polystyrene, etc.) within the reach of children - they
can cause serious injury.
7. The appliance may not be used by persons under 8 years of
age, with reduced physical, sensory or mental capacity, or lac king
the requisite experience and familiarity, unless under supervision
or following instruction in the safe use of the appliance and the
hazards attendant on such use. DO NOT permit children to play
with the appliance. User cleaning and maintenance may not be
done by unsupervised children.
8. DO NOT touch the appliance when barefoot or if any part of
your body is wet.
9. Any repairs, maintenance, plumbing and electrical hookup must
be done by qualified technicians using original spare parts only .
Failure to observe the above instructions can compromise the
safety of the appliance and relieves the manufacturer of any
liability for the consequences.
10. The hot water temperature is regulated by a thermostat which
also acts as a re-armable safety device to prevent dangerous
overheating.
11. The electrical hookup must be done as indicated in this manual.
12. If the appliance is equipped with a power cord, the latter may
only be replaced by an authorised service centre or professional
4
Page 5
technician.
13. Do not tamper with the overpressure safety device, if supplied
together with the appliance; trip it from time to time to ensure
that it is not jammed and to remove any scale deposits. In
countries which have enacted EN 1487, the appliance's intake
pipe must be equipped with a safety device compliant with the
said standard, calibrated to a maximum pressure of 0.7 MPa,
including at least a cock, check v alv e , safety valve and hydraulic
load cutout.
14. It is normal that water drip from the overpressure safety device
and EN 1487 safety unit when the appliance is heating. For this
reason one must install a drain, open to the air , with a continuously
downwards sloping pipe, in an area not subject to subzero
temperatures. Make sure to drain the appliance when it is out
of service or in an area subject to subzero temperatures.
15. Make sure to drain the appliance when it is out of service or in
an area subject to subzero temperatures.
16. Water heated to over 50° C can cause immediate serious burns
if delivered directly to the taps. Children, disabled persons and
the aged are particularly at r isk. We recommend installing a
thermostatic mixer valve on the water delivery line, marked with
a red collar.
17. Do not leave flammable materials in contact with or in the vicinity
of the appliance.
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Symbols:
Symbol Meaning
Failure to observe this warning can result in injury, which may even be fatal in certain
!
circumstances
Failure to observe this warning can result in damage or injury , e ven serious in certain circumstances,
to property, plants and animals
Observe the product's general and specific safety instructions.
!
GENERAL SAFETY STANDARDS
Ref.
Do not open the appliance or remove from
1
its installation
Do not start or stop the appliance by inserting/pulling
the power plug
2
Do not damage the power cord
3
Do not leave objects on the appliance
4
Do not climb onto the appliance
5
Do not clean the appliance without having
first switched it off, pulled its power plug or
6
shut off its power switch
Install the appliance to a solid wall which is not
7
subject to vibration
Make the electrical hookup with cables of
8
adequate cross-section
Restore all safety and control functions after
working on the appliance and check that they
9
are operational before returning it to service
Warning Risk
Electrocution hazard due to the presence of live
electrical equipment Personal injury - burns
caused by overheated components and wounds
caused by sharp edges
Electrocution hazard due to damage to the
power cord, its plug or the socket
Electrocution hazard due to bare live wires
Personal injury due to objects falling off the
appliance as a result of vibration
Damage to the appliance or other property
due to objects falling off the appliance as a
result of vibration
Personal injury due to falling off the appliance
Damage to the appliance or other property due
to the appliance itself detaching from its mounting
Electrocution hazard due to the presence of live
electrical equipment
Danger of the appliance falling off the wall due
to structural collapse, or noisy operation
Danger of fire due to overheating of
undersized electrical wires
Damage or blocking of the appliance due to
improper control
Symbol
!
!
!
!
!
!
!
!
!
Drain all components containing hot water, using
10
the bleed cocks, before handling them
Descale the system as given in the product's
“safety sheet”; when doing so , v entilate the room,
wear safety clothing, make sure not to mix
11
products, and protect the appliance itself and
any adjacent objects
Do not use insecticides, solvents or aggressive
12
detergents to clean the appliance
Danger of burns
Personal injury due to contact of the skin and
eyes with acid, inhalation or ingestion of noxious
chemicals
Damage to the appliance and adjacent objects
due to corrosion by acid
Damage to plastic and painted parts and
assemblies
6
!
!
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Anti-legionella recommendations (European standard CEN/TR 16355)
Information
Legionella is a small bacterium, of stick-like form, and is found naturally in fresh water.
Legionnaire's disease is a serious pulmonary infection caused by inhalation of the
and other species of
used in A/C and air cooling systems. The most effective measure against infection is to prevent the bacterium proliferating
Legionella
. The bacterium is frequently to be found in the plumbing of houses, hotels and water
in water circuits.
European standard CEN/TR 16355 provides guidelines for preventing the proliferation of Legionella in drinking water
systems, without substituting applicable local legislation.
General recommendations
“Conditions favourable to the proliferation of Legionella”. The following conditions are favourable to the proliferation
of Legionella:
• Water temperature in the range 25 - 50 °C. To reduce the proliferation of Legionella, the water temperature be
kept with these limits to prevent them growing or reduce their growth to a minimum. If this is not possible, the
drinking water system must be sanitised thermally;
• Stagnant water. To prevent water stagnating for a long time, the drinking water system must be flushed or made
to run abundantly at least once a week;
• Nutrients, biofilms and sediment in the circuit, including boilers, etc. Sediment may promote the proliferation of
Legionella and should be regularly eliminated from water storage devices, boilers and expansion/holding tanks
(for instance, once a year).
As regards storage heater like the present, if:
1) the appliance is switched off for several months at a time or
2) the water temperature is kept constant in the range 25 - 50°C,
the Legionella bacterium may grow inside the tank. If such circumstances, to reduce the proliferation of the bacterium,
one must run a thermal sanitisation cycle.
This cycle is suited to use in domestic hot water systems and complies with the guidelines for the prevention of
Legionella given in Table 2 of standard CEN/TR 16355 (see below).
Table 2 - Types of hot water system
Separate hot and cold water
No
storage
No
C.1
C.1
-
-
-
-
-
-
Circulation
of hot water
C.2
C.2 C.4
C.2
≥ 50 °C
≤ 3 l
--
-
-
circulation
of hot water
Ref. in
Enclosure C
Temperature
Stagnation
Sediment
a Temperature ≥ 55°C all day or at least 1h a day ≥60°C.
b Volume of water contained in the pipes between the circulation system and the most distant tap.
c Remove the sediment from the storage heater as required by local conditions, but no less frequently than once a year.
d Thermal disinfection for 20 minutes at 60°C, for 10 minutes at 65°C or 5 minutes at 70 °C at all delivery points at least once
a week.
e The water temperature in the circulation circuit may not fall below 50°C.
- Not required
circulation
e
storage
heater
b
remove
Storage
No
of mixed
water
C.3
in
-
Circulation
of mixed
water
C.4 C.5
≥ 50 °C
a
≤ 3 l
c
remove
No storage
upline of the
mixer valves
No
circulation
of mixed
water
C.5
e
thermal
disinfection
b
c
-
-
-
This storage water heater is sold with a thermal disinfection cycle function not enabled for default; as a consequence,
if, for any reason, one of the above said “Conditions for Legionella growth” could occur; it’s hardly recommended to
enable such function rotating the knob up to maximum water temperature (>60°C).
However, the thermal disinfection cycle does not kill all Legionella bacteria in the storage tank. It follows that if the
water temperature setting is less than 55°C, the Legionella bacterium infection may reoccur.
Caution: the water temperature in the tank can cause immediate serious burns. Children, disabled persons and
the aged are particularly at risk of burns. Check the water temperature before taking a bath or shower.
Mixed hot and cold water
Circulation
of mixed
water
C.6
C.6
C.6
thermal
d
disinfection
≤ 3 l
-
-
-
Legionella pneumophilia
Storage upline
of the mixer
valves
No
of mixed
water
C.7
C.7
in
-
-
Circulation
of mixed
≥ 50 °C
thermal
a
disinfection
≤ 3 l
c
remove
d
b
circulation
storage
heater
remove
water
C.8
No storage
upline of the
mixer valves
No
circulation
of mixed
water
C.9
C.9
e
thermal
disinfection
d
b
c
-
-
-
-
bacterium
Circulation
of mixed
water
C.10
thermal
d
disinfection
≤ 3 l
-
d
b
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Description of water heater
1) Hot water outlet
2) Temperature and pressure relief valve (MW only)
3) Cold water inlet
4) Control cover
5) Regulation knob
6) Heating neon
1
4
3
2
1
4
3
6
EW under-sink (EW 10/15) MW under-sink (MW 10/15)
5
6
5
TECHNICAL SPECIFICATIONS
For the technical specifications, refer to the nameplate (the nameplate is located next to the water intake/outlet pipes).
Product information
10
6,6
(MW) Undersink (EW) Undersink (MW) Undersink (EW) Undersink
Refer to the nameplate
2,706 2,691 2,697 2,675
XXS
15 dB
32,7% 32,9% 32,8% 33,0%
10 15
15
7,4
8
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9
The power consumption data in the table and the other information given in the
Product Data Sheet (Enclosure A to this manual) are defined in relation to EU
Directives 812/2013 and 814/2013.
Products equipped with regulator knobs have the thermostat positioned in the setting
condition at its set <ready to use> position shown in the Data Sheet (Enclosure A),
used by the manufacturer to declare the appliance's energy class.
This appliance is conforming with the international electrical safety standards
IEC 60335-1 and IEC 60335-2-21.
The CE marking of the appliances attests its conformity to the following EC
Directives, of which it satisfies the essential requisites:
- LVD Low Voltage Directive: EN 60335-1, EN 60335-2-21, EN 60529, EN 62233,
EN 50106.
- EMC Electro-Magnetic Compatibility: EN 55014-1, EN 55014-2, EN 61000-3-2,
EN 61000-3-3.
- RoHS2 Risk of Hazardous Substances: EN 50581.
- ErP Energy related Products: EN 50440.
User Instructions
PLEASE KEEP THIS BOOKLET FOR FUTURE REFERENCE
The heater is insulated to a high standard therefore it may be left on all the time. The
temperature of the water may be adjusted by turning the knob on the front of the
heater, allow half an hour for the temperature to stabilise between settings. The
maximum temperature setting is achieved with the knob turned fully clockwise to the
MAX position this will give a water temperature of approximately 65-68˚C. In hard
water areas we recommend a maximum of 60˚C which corresponds to a knob
position of approx. 11.00 o'clock. The minimum setting offers frost protection. The
neon light shows when the heating element is working, under control of the
thermostat. If in doubt ring Applied Energy Products Service Dept. on 0844 372 7766.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety. Children should be supervised
to ensure that they do not play with the appliance.
Water Regulations
These regulations ensure a good supply of wholesome water, and that only
approved materials, pipes and fittings are used to convey water.
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Delivery
There are two options available, the MW range and the EW range.
The MW is supplied with the following:
MW unvented water heater (with factory-fitted T + P valve) x1
Wall bracket x1
Tundish x1
Dielectric junction x2
The EW is supplied with the following:
EW unvented water heater x1
Wall bracket x1
Pressure relief valve set at 6 bar x1
Dielectric junction x2
How the heater works
The heating element is controlled by a capillary thermostat . The operating
temperature can be adjusted by the regulation knob on the front of the heater.
In addition to the thermostat there is a thermal cut-out which is set to switch off
the power to the element if the thermostat fails and the water temperature rises
too high. Once the cut-out operates it can only be reset manually (this should be
carried out by the installer - see maintenance).
A magnesium anode is provided to prevent corrosion of the water container. The
MW has a temperature and pressure relief valve on top of the heater which is a
safety device to back-up the thermostat and thermal cut-out. It works by sensing
an excess water temperature or pressure and releasing the hot water to the
discharge tundish and drain.
The heater will only work in the vertical position as the element is shaped to heat
the water at the bottom of the tank. The inlet pipe needs to deliver cold water to
the bottom of the tank and the hot water outlet draws water from the top of the
tank.
When water is heated it expands. In a small unvented water heater of this type the
expansion can normally be accommodated back into the cold water mains, as
indicated in the Water Regulations.
Where this is not possible the installer will need to fit a set of cold water controls.
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Installation Instructions
Before installing the heater read these instructions in full.
If you are unsure
please contact our technical depar
tment 0844 372 7766.
The installation must comply with all relevant Water and Building
Regulations.
The installer should check with the local water authority for confirmation of
the maximum water supply pressure.
a) Siting & fixing
WARNING: When unpacking MW models take care not to damage the
temperature and pressure relief valve on the top of the heater.
A drain has to be provided for any water discharged through the safety valves.
Access to the heater is not normally needed on a day-to-day basis.
A cold water supply pressure between 1 and 5.5 bar is required (if the mains
pressure is above 5.5 bar a pressure reducing valve will need to be installed).
Please note that turning down the stop-cock will reduce flow not pressure.
The outlet pressure from the reducing valve (if supplied) is 3.5 bar.
A 240 VAC; 3 kW single phase electrical supply is required.
Position the heater against the wall and mark the position of the hooked wall
bracket. Fasten the wall bracket to wall using suitable screws and wall plugs
(allowing for the extra weight of water when the unit is full). Hang the heater on
the bracket making sure that the heater is pulled well down on to the bracket, if
necessary by forcing the hooks into the foam insulation.
b) Plumbing
WARNING: The outlet from temperature and pressure relief
valve/pressure relief valve must not be for any other purpose.
Take great care not to allow any swarf into the pipe work or fittings, as this might
impair the operation of the safety valve(s).
The water connection may be carried out as per the following:
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12
diagram 2
MW 10/15
diagram 3
EW 10/15
1) Accommodation of the expansion in supply pipe work
(diagrams 2 & 3).
Do not fit any stop-cocks or non-return valves within the distance required for
expansion.
The distances quoted are for 15 mm pipe these can be approximately halved for
22 mm pipe to shorten the distance required for expansion.
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13
2) Accommodation of expansion in an expansion vessel
(diagrams 4 & 5).
diagram 4
MW 10/15
diagram 5
EW 10/15
Using a pressure reducing valve (set at 3.5 bar), a non-return valve and
expansion vessel charged to 3.5 bar, the expansion is accommodated in the
vessel. This operates on the hydraulic principle; i.e. the expanded water is forced
into the expansion vessel due to the in-line non-return valve. The vessel pressure
charge is increased as it accommodates the expanded water, so that the water is
discharged from the vessel when the hot draw off is opened.
Please note that in ALL cases the DIELECTRIC JUNCTIONS MUST be
connected to the heater before any other connection is made. This is very
important as they prevent an electrolytic reaction occurring and safeguard
the heater against potential aggressive corrosion.
Only the use of copper pipe is recommended for connection to the heater. If
any other material is used it must be able to withstand 90°C at 7 bar
pressure for long periods.
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14
c) Discharge pipe work
NOTE: The following guidelines refer to Building Regulation G3. This
regulation only applies to an unvented system over 15 litres. It is good
practice to adopt the same principles for the EW and MW range.
1) The tundish must be vertical and fitted within 500 mm of the temperature &
pressure relief valve and must be located with the water heater. The tundish must
also be in a position visible to the occupants, and positioned away from any
electrical devices. The discharge pipe from the tundish should terminate in a safe
place where there is no risk to persons in the vicinity of the discharge and to be of
metal.
2) Discharge pipes from the temperature & pressure relief and pressure relief
valve may be joined together.
3) The pipe diameter must be at least one pipe size larger than the nominal outlet
size of the safety device unless its total equivalent hydraulic resistance exceeds
that of a straight pipe 9 m long.
i.e. Discharge pipes between 9 m and 18 m equivalent resistance length should
be at least 2 sizes larger than the nominal outlet size of the safety device.
Between 18 m and 27 m at least 3 times larger, and so on.
Bends must be taken into account in calculating the flow resistance.
See diagram.6 and Table 2.
4) The discharge pipe must have a vertical section of pipe at least 300 mm in
length, below the tundish before any elbows or bends in the pipe work.
5) The discharge pipe must be installed with a continuous fall.
6) The discharge must be visible at both the tundish and the final point of
discharge, but where this is not possible or practically difficult; there should be
clear visibility at one or other of these locations. Examples of acceptance are:
i) Ideally below a fixed grating and above the water seal in a trapped gully.
ii) Downward discharges at a low level; i.e. up to 100 mm above external surfaces
such as car parks, hard standings, grassed areas etc. These are acceptable
providing that where children may play or otherwise come into contact with
discharges, a wire cage or similar guard is positioned to prevent contact, whilst
maintaining visibility.
iii) Discharges at high level; i.e. into a metal hopper and metal down pipe with the
end of the discharge pipe clearly visible (tundish visible or not). Or onto a roof
capable of withstanding high temperature discharges of water 3 m from any
plastic guttering systems that would collect such a discharge (tundish visible).
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15
iv) Where a single pipe serves a number of discharges, such as in blocks of flats,
the number served should be limited to not more than 6 systems so that any
installation can be traced reasonably easily. The single common discharge pipe
should be at least one pipe size large than the largest individual discharge pipe to
be connected. If unvented hot water storage systems are installed where
discharges from safety devices may not be apparent i.e. in dwellings occupied by
the blind, infirm or disabled people, consideration should be given to the
installation of an electronically operated device to warn when discharge takes
place. Note: The discharge will consist of scalding water and steam. Asphalt,
roofing felt and non-metallic rainwater goods may be damaged by such
discharges.
diagram 6
Suggested ways of terminating discharge pipes safely
Temperature & pressure
relief valve
Metal discharge pipe (D1) from
temperature & pressure relief valve.
to tundish.
500 mm Max.
300 mm
Min.
Metal discharge pipe (D2) from tundish
with continuous fall. See Table 2 and worked
example.
Tundish
Discharge below
fixed grating.
(see page 8 for
alternative points
of discharge).
Fixed grating
Trapped gulley
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16
Worked example
The example below is for a G 1/2” temperature & pressure relief valve with a
discharge pipe (D2) having 4 no. elbows and length of 7 m from the tundish to the
point of discharge.
From Table 2
Maximum resistance allowed for a straight length of 22 mm copper discharge pipe
(D2) from G 1/2 T & P valve is 9 m.
Subtract the resistance for 4 no. 22 mm elbows at 0.8 m each = 3.2 m.
Therefore the maximum permitted length equates to: 5.8 m.
As 5.8 m is less than the actual length of 7 m therefore calculate the next largest
size.
Maximum resistance allowed for a straight length of 28 mm pipe (D2) from G 1/2”
T & P valve equates to: 18 m.
Subtract the resistance for 4 no. 28 mm elbow at 1.0 m each = 4 m.
Therefore the maximum permitted length equates to: 14 m
As the actual length is 7 m a 28 mm (D2) copper pipe will be satisfactory.
d) Electrical
WARNING: The appliance must be earthed.
The electrical installation must be in line with the current I.E.E. wiring regulations.
A mains supply of 230/240 VAC (BS 7671) 3 kW (13 amps) is required (diagram
7)
Heat resisting cable, round 3 core 1.5 mm (to BS 6141 table 8) should be used to
connect to the electrical supply through either:
- a 13 amp socket to BS 1363; or
Table 2
Sizing of copper discharge pipe “D2” for common temperature valve outlets.
Valve outlet size Minimum size of
G 1/2 15 mm 22 mm
G 3/4 22 mm 28 mm
G 1 28 mm 35 mm
discharge pipe D1*
Minimum size of
discharge pipe D2*
from tundish
28 mm
35 mm
35 mm
42 mm
42 mm
54 mm
Maximum
resistance allowed,
expressed as a
length of pipe (i.e.
no elbow or bends)
Up to 9 m
Up to 18 m
Up to 27 m
Up to 9 m
Up to 18 m
Up to 27 m
Up to 9 m
Up to 18 m
Up to 27 m
Resistance created
by each elbow or
bend
0.8 m
1.0 m
1.4 m
1.0 m
1.4 m
1.7 m
1.4 m
1.7 m
2.3 m
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17
- a double pole fused isolating switch with a contact separation of 3 mm
minimum on each pole.
The cable enters the terminal compartment through a tube embedded in the foam
insulation, the entrance to this tube is on the right hand side at the bottom.
Flexible cables are colour coded as follows:
Brown.................................................. live
Blue............................................... neutral
Green and yellow............................. earth
Cut back cables to expose 10 mm of conductor for L, N, & E. Connect cable to
supply terminal of the TBST thermostat making sure that all
terminal screws are
tight and that no cable insulation is trapped in the block. Ensure that the cable is
retained within the clamp.
Access to the terminal compartment is gained by prising out the “model”
nameplate, the two small inserts and then undoing the three screws revealed.
NOTE: The earth terminal is located on the heating element securing
bracket in the centre of the appliance.
e) Commissioning
- Check that all the necessary components are supplied and for those not
factory fitted, that they are the type recommended by the manufacturer for
the particular water heater.
- Check that the water heater/components are undamaged.
- Check that the discharge pipe is plumbed so that it falls continuously and
that no taps or valves or other shut-off devices are installed in the pipe.
diagram 7
MW & EW wiring diagram
L
N
E
THERMAL
CUT-OUT
THERMOSTAT
NEON
HEATING
ELEMENT
Page 18
18
- Check that the discharge pipe drains safely to waste and is readily visible.
- Check, in the case where some components are not factory fitted, that
they are marked so as to refer to the warning label on the water heater.
- Open all outlet taps.
- Turn on the mains water supply.
- Close taps in turn as water flow stabilises with no air bubbles.
- Check for leaks.
- Check that no water is passing through the safety valve(s).
- Test the operation of the safety valve(s) by lifting/turning the lever/knob,
and observing that water flows through and safely to waste.
- Switch on electricity and set thermostat (see page 4).
- Check the water heats up.
- Check that “warning to user label” is secure and visible on the heater and
related warning labels are fitted to the controls.
- Demonstrate operation to user, including operation of safety valve(s) and
what to do if it/they operate(s).
- Give this handbook to the user and discuss future maintenance.
Maintenance
a) For the user
In order to obtain the best performance from the heater, the sacrificial anode must
be inspected every year at more regular intervals in aggressive water areas. If the
heating element is heavily coated with scale we recommend descaling at the time
of this inspection. Where the additional cold water controls are fitted , the
expansion vessel will need to be recharged by the installer.
b) For the installer
WARNING: Switch off the power first
Access to the electrical components, the magnesium anode and water container
is gained by unscrewing the 4 screws on the front cover.
If the thermal cut-out has operated the cause must be found before resetting.
To drain the heater close the service valve and:
i) for under-sink models (MW 10 U/15U - EW 10/15) disconnect pipes and
remove the heater from the wall.
ii) for over-sink models (MW 10 O - MW 15 O) undo the cold water supply
pipe and open a hot water tap.
The heating element may be removed after taking out the thermostat
phials by undoing the M6 nut.
The assembly should then be turned through 90° anti-clockwise to ease
removal from the water container.
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19
Once the element is free from the water container the anode may then be
inspected and removed if necessary.
When reassembling the cover make sure that the regulation knob is
coupled with the thermostat.
Fault finding
1) Pressure and temperature valve dripping/running all the time.
Cause: Thermal cut-out and thermostat have failed (this is only the case
if the water being discharged is near to boiling).
Mains pressure is above 7 bar. A pressure reducing valve must be fitted
(refer to diagram 2).
2) Pressure relief valve dripping/running all the time.
Cause: Mains pressure is above 6 bar. A pressure reducing valve must be
fitted (refer to diagram 3).
3) Dripping while unit heating.
Cause: Not enough pipe work for expansion; or stop-cock, non-return
valve or pressure reducing valve has been fitted within the distance
required for expansion (refer to diagrams 4&5). If an expansion
vessel has been fitted, the charge may have failed.
4) No hot water.
Cause: Thermal cut-out has operated.
The heating element has burnt-out.
The thermostat is faulty.
5) Milky water.
Cause: This is a result of heavily limed and oxygenated water being
heated. This is harmless and the cause is the water and not the heater.
6) No water at all.
Cause: Valve incorrectly fitted.
Debris in the mains.
Mains water supply turned off.
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21
Spare Parts
MW/EW spares list: From Autumn 2015
Item no Cat no Description Used on
1 97783319 HEATING ELEMENT 3000W 220-240V MW 10/EW 10
1 97783320 HEATING ELEMENT 3000W 220-240V MW 15/EW 15
2 97783317 FLANGE WITH 4 HOLES MW/EW
3 97783304 WIRED THERMOSTAT MW
3 97783305 WIRED THERMOSTAT EW
7 97783301 HEATER WALL HANGING BRACKET MW/EW
14 97783310 PLASTIC COVER MW/EW
18 97783314 KNOB (REGULATION) MW/EW
22 97783321 SAFETY VALVE (6 BAR) EW
22 97783309 T&P VALVE 1/2” 7 BAR MW
23 97783318 ANODE D:21,3 L:110 M5-M8 MW/EW
30 97783307 SCREW M6x12 MW/EW
33 97783316 FLANGE GASKET MW/EW
38 97783313 SCREW COVER MW/EW
44 97783308 CABLE CLAMP MW/EW
45 97783312 FLANGIA SCREW M6x12 MW/EW
53 97783303 CONFECTION DIELECTRIC JOINTS 1/2” MW/EW
54 97783306 WIRING HARNESS MW/EW
57 97783302 TUNDISH (1/2”) MW
68 97783311 SIGNAL LAMP CAP MW/EW
70 97783322 CAP (REGULATION) EW
71 97783315 TERMINAL SHIELD MW/EW
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Guarantee
We, Applied Energy Products Ltd., guarantee that should this
unvented water heater prove to be defective by reason of faulty
workmanship or material within 12 months of the date of purchase or
commencement of hire we will replace the defective parts FREE OF
CHARGE on condition that:-
a) The appliance has been correctly installed and used only
on the supply circuit or voltage stamped on the rating plate
b) The appliance has been used in accordance with these
instructions and has not been tampered with or otherwise
subject to misuse, neglect or accident.
c) The appliance has not been taken apart, modified or
repaired except by a person authorised by us.
d) Evidence of the date of purchase in the form of an invoice,
receipt (hire purchase documents) is included with the
appliance if returned under guarantee.
“This guarantee does not affect your Statutory rights”
Full details of Terms and Conditions are available on request from:-
REDRING XPELAIR GROUP Ltd.
NEWCOMBE HOUSE. NEWCOMBE WAY, ORTON SOUTHGATE,
PETERBOROUGH PE2 6SE UK
TEL +44 (0) 8443727766
420010602000 0815
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