ArTi WH FLAT 50-100L, Инструкция по эксплуатации, Страница: 4 / 34

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EN
CONNECTION TO THE WATER SUPPLY
The water heater connections for the in-flowing and out-flowing water are colour-coded.
The connection for the supply of the cold water is coloured blue, while the hot water outlet is
coloured red.
The water heater may be connected to the water supply in two ways. The closed-circuit pressure
system enables several points of use, while the open-circuit (Fig. 1) gravity system enables a
single point of use only. The mixer tabs must also be purchased in accordance with the selected
installation mode.
The open-circuit gravity system requires the installation of a non-return valve in order to prevent
the water from draining out of the tank in the event of the water supply running dry or being shut
down. This installation mode requires the use of an instantaneous mixer tap.
As the heating of water expands its volume, this causes the tap to drip. The dripping cannot be
stopped by tightening it further; on the contrary, the tightening can only damage the tap. The
closed-circuit (Fig. 2) pressure system requires the use of pressure mixer taps. For safety reasons
the upply pipe must be fitted with a return safety valve or alternatively, a valve of safety class that
prevents the pressure in the tank from exceeding the nominal pressure by more than 0.1 MPa.
The outlet pening on the relief valve must be equipped with an outlet for atmospheric pressure.
The heating of the water in the heater causes the pressure in the tank to increase to the level set
by the safety valve. As the water cannot return to the water supply system, this can result in the
dripping from the outlet of the safety valve. The drip can be piped to the drain by installing a
catching unit just below the safety valve.
The closed-circuit (Fig. 2) pressure system requires the use of pressure mixer taps. For safety
sons the supply pipe must be fitted with a return safety valve or alternatively, a valve of safety
class that prevents the pressure in the tank from exceeding the nominal pressure by more than
0.1 MPa. The outlet opening on the relief valve must be equipped with an outlet for atmospheric
pressure. The heating of the water in the heater causes the pressure in the tank to increase to
the level set by the safety valve. As the water cannot return to the water supply system, this can
result in the dripping from the outlet of the safety valve. The drip can be piped to the drain by
installing a catching unit just below the safety valve. The drain installed below the safety valve
outlet must be piped down vertically and located in the environment that is free from the onset of
freezing conditions. In case the existing plumbing does not enable you to pipe the dripping water
from the return safety valve into the drain, you can avoid the dripping by installing a 3-litre expan-
sion tank on the inlet water pipe of the boiler.
In order to provide correct operation of the relief valve, periodical inspection of the relief valve
must be carried out by the user. Between the water heater and return safety valve no closing
valve may be built-in because with it the function of return safety valve would be impeded. The
water heater may be connected to the water network in the house without reduction valve if the
pressure in the network is lower than 0.6 MPa (6 bar). If the pressure exceeds 0.6 MPa (6 bar), a
reduction valve must be installed. Prior to the electric connection the water heater must obligatory
be filed with water. By first filling the tap for the hot water upon the mixing tap must be opened.
When the heater is filled with water, the water starts to run through the outlet pipe of the mixing
tap.