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It is necessary to check the safety valve each time before putting it into operation. It is
checked by manual moving of the membrane from the seat, turning the make-and-break
device button always in the direction of the arrow. After being turned, the button must click
back into a notch. Proper function of the make-and-break device results in water draining
through the safety valve outlet pipe. In common operation, such a check needs to be
implemented at least once a month, and after each heater shutdown for more than 5 days.
Water can drip from the safety valve through the drain pipe; the pipe must be freely open to
the atmosphere, placed vertically and shall be in an environment free of temperatures below
freezing. When draining the heater, use a drain valve. You must first close the water supply
to the heater.
Required pressures – Table 3. We recommend that the hot water distribution from the heater was as short
as possible to minimise heat losses.
Figure 4
2.4 ELECTRIC WIRING
2.4.1 ELECTRIC INSTALLATION GENERAL INFORMATION
In the electric wiring casing remove the partition corresponding with the input wire diameter of 8 or 10.
(Figure 5). The degree of protection of electric parts of the heater is IP 45. Power input of electric element
is 2000 W.
Admissible
Safety valve
operating
starting
over-pressure
pressure [MPa]
of water
heater [MPa]
0.6
Table 3
Heaters must be provided with a discharge valve
mounted on the cold service water inlet to the
heater for potential disassembly or repair. When
assembling the security equipment, follow ČSN 06
0830.
Maximum
pressure in
cold water
pipes [MPa]
0.6
up to 0.48
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