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ELECTRIC
INSTANTANEOUS
DAFI WATER
HEATER
OPERATING INSTRUCTIONS
IPX4
IPX5
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This equipment may be used by children aged at least 8 and by
persons with compromised physical or intellectual capacity and persons who are not experienced in and familiar with the equipment, if
supervision or instructions regarding the safe use of the equipment is
ensured to make the potential risks understandable. Children should
not play with the equipment. Children without supervision should not
clean and maintain the equipment.
1. General information
Flow water heaters with bare DAFI heating elements are heaters in which
water is heated during its ow through the heater’s heating block, in which
bare (not insulated) heating elements (heating strands made of resistance
wire) are washed by the owing water and work only during the consumption
of water (the power supplies for the heating strands is switched on by a ow
connector during the water ow through the heating block). Owing to very
small thermal inertia of the heating element, the hot water ows out of the
heater immediately after opening the hot water valve.
The water ow heaters with bare DAFI heating elements are heaters with
very high energy efciency of about 98% and energy effectiveness - E<
0.125 kWh/K). In order to heat 1 l of water up to the temperature of 40
– 45oC, DAFI heaters consume only about 0.033 kWh of electricity. As a
comparison, for instance, energy efciency of accumulation water heaters
with the capacity of 30 l amounts to about 80% and with the capacity above
30 l - about 83%.
The DAFI heater is provided with the hygiene certicate of the National Institute of Hygiene, “CE” certicate of compliance which gives the title to
identify the product with the safety mark “B”, “CB Test Certykat” issued by
Polskie Centrum Badań i Certykacji S.A. (Polish Centre for Research and
Certication) in Warsaw.
The DAFI heater is provided with the Protection Certicate issued by the
Patent Ofce of the Republic of Poland No. 53535/95.
2. DAFI heater characteristics
The DAFI heater is intended for heating the tap water. It is mounted at water
draw-off points of wash basins, kitchen sinks, showers, etc. It may be xed
to one or several hot water draw-off points. The heater is particularly useful
in buildings and facilities which are not equipped with the gas installation.
We recommend the installation of DAFI heaters at each water draw-off point
in order to avoid the water and electricity losses. Owing to very small thermal
inertial of the heating element, the heated water is obtained immediately
after opening the hot water valve.
The DAFI heaters are manufactured with the following powers: 3 700W; 4
500W; 5 500W; 7 300W for the voltage of 230V and 7 500W; 9 000W; 11
000W for the voltage of 400V. The electricity is drawn only at the moment
of water ow, therefore its use is smaller than in storage water heaters. The
heating power determines the quantity and temperature of the heated water.
By regulating the intensity of the water stream owing through the heater, it
is possible to decrease or increase the water temperature.
Before proceeding with the assembly, it is necessary to beco-
me familiar with the instructions!
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The temperature of hot water owing
out of the heater is adjusted
by closing or opening of the
hot water valve slowly.
Equipment of the heater:
The set to be installed together with the tap: Heater, tap, spout with aerator
(g. 1a), installation wrench, junction box (available as an additional element), operating instructions, list of service centres, guarantee card.
Set for the installation with the service connection: Heater, shut-off valve, ½” connection, (g.
1b), installation wrench, junction box, (available
as an additional element), operating instructions,
list of service centres, guarantee card.
Set for installation with the three-way tap.
Heater, 2 M 18x2/ ½” reducing nipples, installation wrench, shut-off valve
(available as an additional element), junction box (available as an additional
element), operating instructions, list of service centres and guarantee card.
For heaters with the power of 3700 W, an aerator and M 22x1/M 24x1 aerator reducer is supplied.
g 1
a)
b)
3. Construction of the water heater
The DAFI heater consists of the heating block placed on the water unit. The
water unit is made of the base which is provided with short stub pipes for
supply of cold water and discharge of hot water. Inside the heater, there is
the heating block provided with water channels with the heating element
(heating strand) and elements used for supplying electricity. The whole device is enclosed in an enclosure.
4. Operating principle
After opening the hot water valve, the owing water causes the ow connector to be switched on (power is supplied to the heating element) and
the owing water directed to the tap is heated. Water temperature depends
on the pressure and temperature of the water owing into the heater. The
closure of the hot water valve causes the ow connector to be switched off
(the power supply to the heating element is interrupted). The temperature
of the water owing into the heater can be adjusted only by closing and
opening of the hot water valve slowly within the scope of outow of the hot
water from the heater.
The smaller water ow means the higher temperature.
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5. Principles of heater operation
The properly installed DAFI heater used as intended is completely safe in
use. Before the installation of the heater and before putting it into operation,
it is absolutely necessary to observe the following conditions:
- the heater cannot be mounted in rooms, where temperature falls below
1°C.
- do not leave the damaged or disassembled heater connected to power
supply.
- use the electrical wires with minimum section which corresponds to the
rated current of the heater (see also section 6.2 of the instructions),
- observe unconditionally the sequence of connections,
- before connecting the heater to the power source, you must check whether
the heater is deaerated (see section 7.1 h of the instructions),
- it is prohibited to use a damaged or faulty device,
- it is prohibited to install the heater in shower enclosures.
Any use of the DAFI heater which is contrary to its purpose causes the
manufacturer to not accept the responsibility for the produced damage. The
manufacturer does not accept responsibility for the damage and effects resulting from unauthorised modications and repairs of the heater.
6. Sequence for connection of the device to the water supply system and
the wiring system.
In the rst place, the DAFI water heater must be connected to the water system.
Only after deaeration of the water supply system and the heater, the device may be
connected to the wiring system.
6.1 Connection to the water supply system
The DAFI heaters are low-pressure devices and may operate in water supply networks with the pressure of not less than 100 000 Pa and not more than 600 000
Pa. This may be the municipal water supply system or the local one with a pressure
booster, in the case of single-family buildings.
In the case of uctuations of water pressure caused, among other things, by using
automatic ushing valves nearby the heater and in the case of pressure increase
above 600 000 Pa, install the pressure reducer.
WARNING - Do not switch on the heater if it is likely that the water in
the heater is frozen.
6.2 Connection to the wiring system
The heater with the power greater than 3.7 kW must be connected
on a permanent basis to the wiring system provided with the earthing
terminal.
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The heater must be earthed.
The connection to the wiring system must be ensured by an electrician
provided with an appropriate licence. The heater must be connected
to the wiring system performed only in the TN-S or TN-C-S network
system (according to 0), with copper wires and cross-section corresponding to the rated current of the heater. The wiring system must be
equipped with the switch, that allows the voltage at all poles from the
power source to be disconnected
The overload protection of the electrical network during the installation of the DAFI electrical ow water heater must be selected in accordance with the rated current of the heater, given in the table with
parameters.
Note!
If the power cord is damaged, it should be replaced by an appropriate cord available at the manufacturer or at the network of authorised
service centres.
Each percent of voltage drop below the rated voltage value decreases
the heating efciency by about 2%, and therefore, it decreases the
water heating effect.
7. Installation and operation
The DAFI water heater may be installed with its own tap, with the connection and
reducing nipples. In the case of installation with the connection and nipples, it is
recommended to install the DAFI shut-off valve at the water inlet to the heater. If the
valve is included in the set, it may be purchased in the retail network.
NOTE! The heater cannot be mounted in rooms, where temperature falls below 1°C.
7.1 Installation of the heater with its own tap
a) For the purpose of installation, use only the installation wrench included
as part of the equipment. Before proceeding with the installation, close the
main water valve and clean the threads. Seal the G ½” thread of the tap body
with the locknut screwed on it, using the teon tape (g. 2), and then screw
it into the tting protruding from the wall, in order to have the two stub pipes
for xing the heating unit directed vertically upwards.
b) while screwing the tap, maintain particular caution so as not to strip the
thread. Do not screw in the tap while holding the knobs with both hands The
correct method of screwing in the tap is shown in g. 3.
c) The Distance between the face of the nut and the tting should be 1-4
mm. After establishing the position and distance of the tap, lock the nut by
tightening it in the direction of the tting protruding from the wall (g. 4).
d) Screw the spout to the tap, screw the xing nut onto the right stub pipe of
the tap (M 18x2), check whether both tap valves are turned off, turn on the
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main water shut-off valve, turn on the cold water valve of
the heater tap, letting the necessary water quantity move
through it in order to remove pollution and air, which are
present in the water system.
d) Place the ltering sieve in the left stub pipe of the tap
(g. 6.)f) The heater is mounted on two stub pipes (on top
of the M 18x2 tap), and the spout or sprinkling set is mounted on the bottom end (g. 7).
g) Tighten the nuts of the heater uniformly to the tap, avoiding the tilting of the heater (g. 8).
NOTE!
h) After connecting the heater to the water supply system,
deaerate the heater by opening the hot water tap valve
(g. 9) until the moment of gaining certainty that there is
no air in the water system.
i) Switch on the power supply ONLY after the prior deaeration of the heater as per section 7.1 h (g. 10)
There is a possibility to install the DAFI water heater on
the existing wall bathroom tap or kitchen faucet. In lieu of
the spout, the following items can be screw into the tap:
a) an elbow with M 22 x 1.5 and G ½” female threads to
which the DAFI heater tap is screwed in (g. 11a).
b) reducer (shower connector) with the M 22 x 1.5 female
thread and G 1/2’’ male thread, to which the G1/2” elbow
and then the DAFI heater tap are screwed in (g. 11b).
Further installation operations are the same as in the case
of installation of the heater at the end of the water supply
pipe running out of the wall.
7.2 Installation of the heater with the connection
In case of installation of the heater with the connection, use
only the DAFI heater with the degree of protection against water penetration - IPX4 (g. 12).
In this system, the connection should be preceded by the
DAFI shut-off valve (g. 13).
In order to install the heater with the connection, the connecting
element, which is mounted on the pipe that supplies water is
used instead of the tap with the spout.
Before the installation of the heater, install the shut-off valve
on the pipe and let the necessary water through it in order to
remove the contaminants and the air, which are present in the
water system.
Install the connection and x the DAFI water heater to it. During
this activity, it is important to supply the cold water into the stub
pipe of the heater in accordance with the marking (arrows) at
g 2
g 3
g 4
g 5
g 6
g 7
g 8
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the back of the heater (g. 13). Then, open the shut-off valve upstream the heater and the hot water valve on the tap
and let out the quantity of water that is necessary to deaerate
the heater. The installation of the DAFI heater in this system
enables its installation next to the shower enclosure or under
the wash basin or sink with the three-way faucet. It also makes the supply of the heated water to several receipt points
possible. The heater with the connector may operate in any
position.
It is required to close the shut-off valve before the disassembly of the heater or before each operational break longer than
12 hours
7.3 Installation of the heater to the three-way
faucet
Use only the DAFI heater with the protection degree
of IPX 4 for this type of installation.
The DAFI shut-off valve must be installed directly at
the inlet of water to the heater.
Before the installation of the heater, while turning on
the DAFI shut-off valve, let the necessary water ow
through it in order to remove the contamination and
air which are present inside the water system. Connect the DAFI heater, using the reducing nipples and
hoses for the shut-off valve and the tap. Then, open
the valve that shuts off the water supply to the heater
and the hot water valve on the tap and let out the water quantity that is necessary to deaerate the heater.
8. Operation
NOTE!
Before connecting the heater to the wiring system,
deaerate the heater (see section 7.1.h, 7.2 and 7.3).
If the air ows out instead of water during the use,
close the water supply immediately and disconnect
the power supply for the heater. Power supply may
be switched on again after the heater is deaerated.
Do not switch on the heater, if it is likely that the
water in the heater is frozen (as mentioned above
in warning from section 6.1).
The contamination of the aerator may cause:
- reduction or total disappearance of water outow,
- excessive heating of water or such decrease in
the water outow which prevents the heater from
being switched on.
g 10
g 11
a
b
g 12
cold
water
hot
water
g 13
g 9
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It is recommended to clean the aerator of the limescale regularly in
order to unblock it.
The cleaning of the aerator is very simple - it consists in “pushing out” the
limescale by pushing in the rubber inset of the aerator (g. 14). In order to
extend the life of the heater, there is a ltering sieve placed in the left stub
pipe of the tap. An excessive increase in the water temperature, a signicant
decrease in the water outow or lack of outow may mean the necessity to
clean the ltering sieve or to replace it.
It is recommended to install the DAFI mechanical water lter upstream the DAFI heater
9. Instructions regarding connection to the wiring grid by means of
the DAFI junction box (available as the additional equipment)
The heaters with the power of 3,7 kW, in accordance with the change introduced into EN 60335-2-35/A1:2007, may be connected to power supply,
using the non-disconnectable power cable with a socket. Other heaters
should be connected on a permanent basis to the wiring system. For such
a connection, we can use the DAFI junction box (g. 15, g. 16, g. 17 and
g. 18).
a) Insert the body of the junction box (1) into the standard ushed box for the
auxiliary electrical equipment (2) in accordance with the markings on the box
(3), then push it so that the body seal (4) could press against the wall on its
whole circumference and x it by means of expansion bolts and screws (5) (a
section without a seal at the bottom of the body (6)
must remain unsealed, it serves the purpose of discharging the possibly collecting moisture) (g. 15.).
b) Connect the heater wire (7) with the wires of the
system (8) using the terminal block (9), x the wire
by means of the wire contact (10) and screws (11),
push in the terminal block with the connected and
xed wire into the socket (12) in the body of the box
(g. 18). Please pay particular attention to the proper connection of the earthing wire and to provision
of the proper electrical connection by strong and solid tightening of the terminals.
c) Place the box cover (13) Slide the cover onto the box from the bottom,
along the heater wire until the bottom hitches (14) of the cover are slid in
under the body of the box, then press the cover strongly to the body making
sure that the dowels in the cover (15) are
slid into openings (16) in the body of the
box (g. 17).
d) In order to remove the cover, slide in
the slot head screwdriver (17) into the side
gap between the boxy of the box (1) and
the cover (13), and turn it by 90o. (g.18)
NOTE: In the case of failure to purchase
g 14
g 15
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the original junction box manufactured by our
company, it is possible to use a different commercially available junction box.
DECLARATIONS OF COMPLIANCE FOR THE
HEATERS ARE AVAILABLE AT THE FOLLOWING WEBSITE ADDRESS:
www.DAFI-heaters.com/pl/ in the “certicates” tag
10. Guarantee
The guarantee period lasts 24 months, commencing from the date of sale of the heater. The defects revealed during the term of the guarantee
will be removed free-of-charge within 14 days of
the date of delivery of the heater to the authorised
service centre, or the manufacturer (the list of service centres is provided in the packaging). The
purchaser is obliged to deliver the DAFI heater to
the service centre together with the warranty card.
The lack of the guarantee card or the damage to
the seal causes the loss of the guarantee.
The observance of the principles given in these
operating instructions ensures proper operation of the DAFI heater.
NOTE!
In accordance with the International Safety Standards, heating equipment
should be subject to periodical surveys every 30 months.
The average life of the DAFI water heater, if it is operated in accordance
with the operating instructions and recommendations of the manufacturer
is about 7-8 years.
11. Causes of anomalies in the operation of the heater.
- when the water is heated by the heater insufciently:
a) check the voltage of the power supply network and rectify the possible
causes of voltage drop,
- when the water is heated by the heater excessively:
a) clean the aerator (photograph 16),
b) clean the ltering sieve in the left stub pipe of the tap,
c) check the patency of the water supply system upstream the heater,
- when the heater does not function:
a) check the power supply and possibly check the fuses,
b) check whether the water pressure in the water supply network is not too
low, which is revealed by the poor water ow through the heater,
g 16
g 17
g 18
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Information for the user on the
removal of the waste electrical equipment
In pursuance of the Waste Electrical and Electronic Equip-
ment Act of 29 July 2005 (Journal of Laws dated 20 Septem-
ber 2005, No. 180, item 1495)
The symbol placed on the equipment or the packaging indicates
that the waste equipment may not be treated like general household
waste and that upon ending the operation period, it must be brought
to one of the electrical and electronic equipment selection points or-
ganised by the public administration.
1) it is prohibited to mix the waste equipment with other waste;
2) the mixing of the waste equipment with other waste carries a risk
for the environment which consists in the increased amount of litter in
the environment, as the plastics used in the process of manufacturing
the product are materials which are not subject to decomposition, the
equipment does not contain any other hazardous components;
3) heating mass - about 1 kg;
At the same time, it is announced that in accordance with the regula-
tions of the aforementioned act, the system for collection of the wa-
ste equipment is being organised, at the present stage, it is possible
to dispose of the equipment at selected service centres - articles 27
and 28 of the Act.
A household fulls an important role in contributing to the reuse and
recycling of the waste equipment; at this stage the attitudes which
inuence the safeguarding of the common good which is the clean
natural environment are shaped. Households are also some of the
largest users of small equipment and its rational management at this
stage inuences the recycling of secondary raw materials.
- the cause of breaks in the operation of the heater is:
a) excessively low or decreasing water pressure in the water supply network.
The repairs of the device must be performed in the authorised service centre
exclusively.
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1. base
2. long contacts
3. housing
4. short contacts
5. connector nut
6. connection wire
7. connector
8. connector seal
9. heating element
10. membrane
tappet
11. membrane
12. membrane
cover
13. oring
14. ceramic pipe
1. contacts
2. base
3. housing
4. heating element
5. tap
6. spout
7. connection wire
NOTES ON INSTALLATION OF DAFI WATER HEATERS
DAFI energy saving water heaters can be installed above, or under your basin or sink. Shower installations are also possible, but never
inside the shower cubicle. Installation of your water heater in the ceiling or behind the wall, or in a cupboard next to the shower should be
considered.
DAFI water heater Installation Requirements:
1. DAFI water heaters must be installed as close to the point of use as possible to minimise pipeline heat loss.
2. Water pressure must not be less than 60kPa (0.6 bar) and not exceed 600kPa (6bar). If water pressure is too high, a pressure reducing
valve must be installed.
3. Water quality e.g. mains supply, borehole, river etc. Should water quality be suspect, a filter must be installed.
4. Single phase or 3 phase power supply with own isolator switch must be available as close as possible to point of usage.
DAFI water heater Installation Procedure:
Installing the DAFI energy saving water heater is not complicated, but it needs to installed by a professional plumber and
electrician for problem-free operation.
Water supply:
• To be undertaken by a qualified Plumber
• Incoming water supply should be clean and without any suspended solids or organic materials.
• The "static" incoming cold water supply pressure to be accurately measured to ascertain operating conditions.
• The maximum operating pressure of all DAFI Heater models is 600 kPa (6 Bar).
• A suitable Pressure Reducing Valve is to be installed before the heater unit, should this 600 kPa limit be exceeded.
• Heater manifold nut assembly must only to be tightened with the spanner supplied in each box.
• All air to be vented from the heater unit prior to connecting the 240 volt or 400 volt 50 Hz power supply.
• A cut-off valve should be installed on the water inlet line to the DAFI heater.
• All heater units for under sink installation can be installed at any angle.
Recommendations:
• Installing a composite pipe from your DAFI water heater to the point of usage will further reduce heat loss and save more energy.
• For optimum performance enhancement Spray Nozzle provided should be attached to tap. For models 3.7 kW & 4.5 kW
Spray Nozzle is highly recomended. Spray Nozzle spread water and rise pressure of hot water.
• Beware of over tightening , use plastic key provided. Do not use metal spanner!
• For performance see table FT - flow/temperature
Tips:
1.Each installation is indywidual. Performance of Dafi Heater depends on: voltage drop, temperature of cold water, pressure , type of taps,
distance of instalation from point of use, etc. Selection of right power should be done by experienced and competent trade person.
2. Before you buy check if obtained flow corresponds to your demands.
Electric supply:
To be undertaken by a qualified Electrician
1. Each heater unit is to be wired to the Distribution Board via the existing Earth Leakage System.
Minimum 3 core cable sizes*
- 2.5mm² for 3.7 kW & 4.5kW (240V)
- 4 mm² or 2x2.5mm²(ring) for 5.5 kW & 7.3kW - (240V)
- 2.5mm² for 7.5kW these models is two phase no neutral -(400V)
- 4 mm² 9 kW & 11kW these models are two phase no neutral -(400V)
*size of cable need to be confirmed with installation method and voltage drop
2. Models 7.5 kW - 11kW are non-domestic unles three phase supply system in property.
Any combination of two phases no neutral (eg brown/black=400V).
3. A dedicated suitably sized breaker to be installed on the Distribution Board for each heater unit.
4. A suitable sized 2 pole electric isolator (not fuse spur) to be installed.
5. DAFI heater units are not to be connected to the electrical supply by standard BS 1363 wall plug.
SPECIFICATIONS
[kW] Rated power consumption
3.7 4.5 5.5 7.3 7.5 9 11
[~V]
Rated voltage
1/N/PE~ 240V 50Hz 2/PE~ 400V 50Hz
[A]
Rated current 16 19.6 24 31.7 18.75 22.5 25
[A1]
Automatic breaker
16 20 25 32 20 25 32
[B1]
Wa ter ciency measured in
liters / the minimum
temperature of owing water
15°C and pressure 200 000 Pa
40°C
1.9 2.4 2.9 4 4 4.7 5.8
45°C
1.7 2 2.5 3.3 3.3 4 5.1
≤ 1300 cm - 15°C
FT - ow/temperature
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Manufacturer: FORMASTER S.A 25-818 KIELCE,
Fabryczna 24 str., Poland
phone.: +48 41 3464810 ext 123
fax +48 41 3464870
www.formaster.com
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