tiki GBFU 50 E5 Gebrauchsanweisung Seite 14

Fig. 1: Vertical installation on a wall
A
GBFU 50 E5 600
GBFU 80 E5 820
GBFU 100 E5 965
GBFU 120 E5 1120
GBFU 150 E5 1335
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.
In a closed, pressurized system (Fig. 3) pressurised mix taps should be used at the
outlet points. To ensure safe operation of the heater a safety valve should be
installed on the inlet pipe to prevent elevation of pressure for more than 0.1 MPa
(1 bar) above the nominal pressure. The outlet opening on the safety 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.
To avoid water dripping from the safety valve, an expansion tank should be installed
on the inlet pipe of the heater with the capacity of at least 5 % of the heater volume.
To ensure proper operation of the safety valve, periodical inspections must be carried
out to remove limescale and make sure the safety valve is not blocked. To check the
valve, open the outlet of the safety valve by turning the handle or unscrewing the nut
14
B C D
415 190 145
615 210 345
765 205 495
915 210 645
1115 225 845
Fig. 2: Horizontal installation on a wall
G
260
Connection and installation dimensions
of the water heater [mm]
360
510
510
510