-
17
-
P
lease find necessary pressure values in the below
Table
6
. For proper safety valve operation, a backflow
valve must be mounted on the inlets pipes, preventing spontaneous heater draining and hot water
penetrating back into the water main. We recommend that the hot water distribution from the heater was
as short as possible to minimise heat losses. At least one demountable joint must be mounted between the
tank and every supply pipe.
Adequate piping and fittings with sufficiently dimensioned maximum temperature and pressure values
must be used.
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 the standards.
Table 6
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 may be dripping off the drain pipe of the safety valve; the pipe must be open into the
air, pointed down; environment temperatures must not drop below zero. When draining the
heater, use the recommended drain valve. First, close the water supply into the heater.
SAFETY VALVE
OPERATING
PRESSURE
[MPa]
ADMISSIBLE
OPERATING
WATER
HEATER
PRESSURE
[MPa]
MAX
PRESSURE IN
THE COLD
WATER PIPE
[MPa]
0,6
0,6
up to
0,48
0,7
0,7
up to
0,56
1
1
up to
0,8
