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 flow through the heater’s heating block, in which
bare (not insulated) heating elements (heating strands made of resistance
wire) are washed by the flowing water and work only during the consumption
of water (the power supplies for the heating strands is switched on by a flow
connector during the water flow through the heating block). Owing to very
small thermal inertia of the heating element, the hot water flows out of the
heater immediately after opening the hot water valve.
The water flow heaters with bare DAFI heating elements are heaters with
very high energy efficiency 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 efficiency 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 certificate of the National In-
stitute of Hygiene, “CE” certificate of compliance which gives the title to
identify the product with the safety mark “B”, “CB Test Certyfikat” issued by
Polskie Centrum Badań i Certyfikacji S.A. (Polish Centre for Research and
Certification) in Warsaw.
The DAFI heater is provided with the Protection Certificate issued by the
Patent Office 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 fixed
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 flow, 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 flowing 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!
