Dafi IPX4 Manuale utente

ELECTRIC

INSTANTANEOUS

DAFI WATER

HEATER

OPERATING INSTRUCTIONS

IPX4

IPX5

This equipment may be used by children aged at least 8 and by

persons with compromised physical or intellectual capacity and per-

sons 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 efciency 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 efciency 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 certicate of the National In-

stitute of Hygiene, “CE” certicate of compliance which gives the title to

identify the product with the safety mark “B”, “CB Test Certykat” issued by

Polskie Centrum Badań i Certykacji S.A. (Polish Centre for Research and

Certication) in Warsaw.

The DAFI heater is provided with the Protection Certicate issued by the

Patent Ofce 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!

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 (availa-

ble as an additional element), operating instruc-

tions, list of service centres, guarantee card.

Set for the installation with the service connec-

tion: 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 aera-

tor reducer is supplied.

g 1

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 devi-

ce is enclosed in an enclosure.

4. Operating principle

After opening the hot water valve, the owing water causes the ow con-

nector 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 outow of the hot

water from the heater.

The smaller water ow means the higher temperature.

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 re-

sulting from unauthorised modications 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 ne-

tworks 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.

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 corre-

sponding 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 installa-

tion of the DAFI electrical ow water heater must be selected in ac-

cordance 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 appropria-

te 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 efciency 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 teon 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

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 moun-

ted on the bottom end (g. 7).

g) Tighten the nuts of the heater uniformly to the tap, avo-

iding 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 de-

aeration 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 wa-

ter 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

the back of the heater (g. 13). Then, open the shut-off va-

lve 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 ma-

kes 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 disassem-

bly 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. Con-

nect 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 wa-

ter 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 outow,

- excessive heating of water or such decrease in

the water outow which prevents the heater from

being switched on.

g 10

g 11

g 12

cold

water

hot

water

g 13

g 9

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 signicant

decrease in the water outow or lack of outow may mean the necessity to

clean the ltering sieve or to replace it.

It is recommended to install the DAFI mechanical water lter upstre-

am 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 intro-

duced 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 di-

scharging 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 pro-

per connection of the earthing wire and to provision

of the proper electrical connection by strong and solid tighte-

ning 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

the original junction box manufactured by our

company, it is possible to use a different commer-

cially available junction box.

DECLARATIONS OF COMPLIANCE FOR THE

HEATERS ARE AVAILABLE AT THE FOLLO-

WING WEBSITE ADDRESS:

www.DAFI-heaters.com/pl/ in the “certicates” tag

10. Guarantee

The guarantee period lasts 24 months, commen-

cing from the date of sale of the heater. The de-

fects 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 se-

rvice 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 insufciently:

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

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 fulls an important role in contributing to the reuse and

recycling of the waste equipment; at this stage the attitudes which

inuence 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 inuences 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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