Redring MW10, EW10, EW15, MW15 Handbook
MW & EW 10 & 15 Litre Unvented Water Heaters
HANDBOOK
IMPORTANT:
This booklet should be given to the customer
after installation and demonstration.
3
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 may return the equipment to the retailer at the time of purchase of a new equivalent 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.
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4
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 ne xt user/owner
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 wer circuits m ust 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 f or 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 ph ysical, sensory or mental capacity , or lac king
the requisite experience and f amiliarity, 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 par t 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
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 valve , saf ety valve and h ydr aulic
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 ov er 50° C can cause immediate serious b urns
if delivered directly to the taps. Children, disabled persons and
the aged are particular ly at risk. We recommend installing a
thermostatic mixer valve on the water delivery line, marked with
a red collar.
17. Do not leav e flammable materials in contact with or in the vicinity
of the appliance.
GENERAL SAFETY STANDARDS
Symbols:
Danger of the appliance falling off the wall due
to structural collapse, or noisy operation
Install the appliance to a solid wall which is not
subject to vibration
Do not clean the appliance without having
first switched it off, pulled its power plug or
shut off its power switch
Electrocution hazard due to the presence of live
electrical equipment
Danger of fire due to overheating of
undersized electrical wires
Make the electrical hookup with cables of
adequate cross-section
Restore all safety and control functions after
working on the appliance and check that they
are operational before returning it to service
Damage or blocking of the appliance due to
improper control
Symbol
Warning Risk
Electrocution hazard due to damage to the
power cord, its plug or the socket
Do not start or stop the appliance by inserting/pulling
the power plug
Electrocution hazard due to bare live wires
Do not damage the power cord
Personal injury due to objects falling off the
appliance as a result of vibration
Do not leave objects on the appliance
Damage to the appliance or other property
due to objects falling off the appliance as a
result of vibration
Ref.
Do not open the appliance or remove from
its installation
Electrocution hazard due to the presence of live
electrical equipment Personal injury - burns
caused by overheated components and w ounds
caused by sharp edges
Do not climb onto the appliance
Personal injury due to falling off the appliance
Damage to the appliance or other property due
to the appliance itself detaching from its mounting
Drain all components containing hot water , using
the bleed cocks, before handling them
Danger of burns
Descale the system as given in the product's
“safety sheet”; when doing so , ventilate the room,
wear safety clothing, make sure not to mix
products, and protect the appliance itself and
any adjacent objects
Personal injury due to contact of the skin and
eyes with acid, inhalation or ingestion of no xious
chemicals
Damage to the appliance and adjacent objects
due to corrosion by acid
Do not use insecticides, solvents or aggressiv e
detergents to clean the appliance
Damage to plastic and painted parts and
assemblies
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6
7
8
9
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2
3
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4
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1
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5
!
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10
11
12
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 v en serious in certain circumstances,
to property, plants and animals
Observe the product's general and specific safety instructions.
!
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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
Legionella pneumophilia
bacterium
and other species of
Legionella
. The bacterium is frequently to be found in the plumbing of houses, hotels and water
used in A/C and air cooling systems. The most effective measure against infection is to prevent the bacterium proliferating
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
Mixed hot and cold water
No
storage
Storage
No storage
upline of the
mixer valves
Storage upline
of the mixer
valves
No storage
upline of the
mixer valves
No
circulation
of hot water
Circulation
of hot water
No
circulation
of mixed
water
Circulation
of mixed
water
No
circulation
of mixed
water
Circulation
of mixed
water
No
circulation
of mixed
water
Circulation
of mixed
water
No
circulation
of mixed
water
Circulation
of mixed
water
Ref. in
Enclosure C
Temperature
Stagnation
Sediment
C.1
-
-
-
C.1
-
-
-
C.2
≥ 50 °C
e
≤ 3 l
b
-
C.2
-
C.3
in
storage
heater
a
-
remove
c
C.2 C.4
≥ 50 °C
e
≤ 3 l
b
remove
c
C.4 C.5
thermal
disinfection
d
-
--
C.5
-
-
C.6
thermal
disinfection
d
≤ 3 l
b
-
C.6
-
C.7
in
storage
heater
a
-
remove
c
C.7
-
C.8
≥ 50 °C
e
thermal
disinfection
d
≤ 3 l
b
remove
c
C.6
-
thermal
disinfection
d
C.9
-
-
C.9
-
-
thermal
disinfection
d
C.10
≤ 3 l
b
-
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
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.
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TECHNICAL SPECIFICATIONS
For the technical specifications, refer to the nameplate (the nameplate is located next to the water intake/outlet pipes).
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
Product information
10
6,6
15
7,4
Refer to the nameplate
(MW) Undersink (EW) Undersink (MW) Undersink (EW) Undersink
XXS
15 dB
10 15
2,706 2,691 2,697 2,675
32,7% 32,9% 32,8% 33,0%
EW under-sink (EW 10/15) MW under-sink (MW 10/15)
1
3
4
6
5
1
3
4
2
6
5
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