-
8
-
2.3
PLUMBING FIXTURE
Power water connects to pipes with ¾“ thread in the bottom part of the tank.
Blue
-
cold
water supply, 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 utility water pressure tank shall be equipped with membrane spring loaded with
safety valve.
Nominal clearance of safety valves is defined by standard.
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 that safety valve is mounted on a branch.
This allows
easier exchange without having to drain the water from the heater.
Safety valves with fixed
pressure settings from the manufacturer are used for the assembly.
Starting pressure of a
safety valve must be identical to the maximum allowed heater pressure, and at least 20 %
higher than the maximum pressure in the water main (Table 2).
If the water main pressure
exceeds that value, reduction valve must be added to the system.
No closing armature may
be mounted between the tank and the safety valve.
During 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 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
tank, use the recommended drain valve.
First of all, close water inlet in the tank.
Find necessary pressure values in the below Table 2.
For proper safety valve operation, a backflow valve
shall be mounted on the inlet pipes, preventing spontaneous heater draining of the tank and hot water
penetration 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.
