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Gorenje TGR 30-120 SM -UNI Manual

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2) Energy consumption to maintain the temperature of water in the water heater at 65 °C if the
surrounding temperature is 20 °C, measured according to EN 60379.
A B C G
TGR 30 SM 476 275 173
80
TGR 50 SM 578 365 185
130
TGR 80 SM 783 565 190
180
TGR 100 SM 943 715 200
260
TGR 120 SM 1098
865 205
260
Connection and installation
dimensions of the water heater [mm]
CONNECTION TO THE WATER SUPPLY
The water heater connections for the inlet and outlet of water are colour-coded. The inlet of
cold water is marked with blue colour, while the hot water outlet is marked with red colour.
The water heater can be connected to the water supply in two ways. The closed-circuit
pressure system enables several points of use, while the open-circuit gravity system
enables a single point of use only. The mixer taps must also be installed 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 a cross-flow 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 pressure system requires the use of pressure mixer taps. For safety
reasons the supply pipe must be fitted with a safety valve or alternatively, a valve of the
safety class that prevents the pressure in the tank from exceeding the nominal pressure by
more than 0.1 MPa (1 bar). The outlet opening on the relief valve must be equipped with
an outlet for atmospheric pressure.
The heating of 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 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 placed in an 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
safety valve into the drain, you can avoid the dripping by installing a 3-litre expansion tank
on the inlet water pipe of the boiler.
In order to provide correct operation of the safety valve, periodical inspections of the relief
valve must be carried out by the user to eliminate any limescale and check if the safety
valve is blocked. To check the valve, open the outlet of the safety valve by turning the
handle or unscrewing the nut of the valve (depending on the type of the valve). The valve
is operating properly if the water comes out of the nozzle when the outlet is open.
EN
461
454
G 1/2
G
B
C
A
1
0
0
3
0
0
-
3
5
0
100
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