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13
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2.3
PLUMBING FIXTURE
Power water connects to pipes with 3/4" thread in the bottom
part of the tank.
Blue
-
cold water
inlet; red
-
hot water outlet.
For potential disconnection of the tank, the sanitary water inlets
and outlets must be provided with screw coupling Js 3/4".
The safety valve is mounted
on the cold water inlet identified with a blue ring.
Every hot sanitary water pressure tank shall be equipped with membrane spring loaded
with safety valve.
Nominal clearance of safety valves is defined by standard.
Tanks are not
equipped with a safety valve.
Safety valve shall be easily accessible, fitted as close as possible
to the tank.
The inlet pipes must have at least the same clearance as the safety valve.
Safety
valve is placed high enough to secure dripping water drain by gravity.
We recommend mounting
the safety valve onto a branch pipe.
Easier exchange without the necessity of draining water
from the tank.
Safety valves with fixed pressure settings
from the manufacturer are used
for the assembly.
The starting pressure of the safety valve must be identical to the maximum
allowed pressure of the tank, and at least 20 % higher than the maximum pressure in the water
main (Table 3).
If the water main pressure exceeds such value, a reduction valve must be added
to the system.
No closing armature may be mounted between the tank and the safety valve.
During the assembly, follow the guide provided by the safety equipment manufacturer.
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 regular operation, such a check needs to be carried out at least
once a month, and after each shutdown of the tank longer 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 tank, use
the recommended drain valve.
First of all, close water inlet in the tank.
Find necessary pressure values in the below Table.
Backflow valve must be fitted on the inlet pipe to ensure
the right operation of safety valve
that prevents spontaneous heater draining of the tank and hot water
penetration back into the water main. We recommend that the hot water distribution from the tank
is as short as possible in order to reduce 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.
Tanks must be provided with discharge valve
mounted on the cold sanitary water inlet to the tank
for potential disassembly or repair.
When assembling the security equipment, follow the standard.
