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9
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2
OPERATION AND FITTING INSTRUCTIONS
2.1
OPERATING CONDITIONS
The tank shall only be used in accordance with the conditions specified on the power plate
and in instructions for electric wiring.
Besides legally acknowledged national regulations
and standards, also conditions for connection defined in local electric and water works have
to be adhered to, as well as the installation and operation manual.
The room, in which the
appliance will be operated, must be frost
-
free.
The appliance has to be mounted at a
convenient place, it means that the appliance must be easily available for potential
necessary maintenance, repair or replacement, as the case may be.
We emphasize that the tank shall not be connected to power supply if flammable liquids
(benzine, stain cleaner) or gases, etc., are handled in its proximity.
If water is strongly calcareous we recommend that any of the common decalcifying devices
was installed with the appliance, or that the thermostat was set to the minimum operating
temperature of 60
o
C.
For proper operation, drinkable water of adequate quality shall be
used.
To avoid potential deposits we recommend that water filter is connected in series with
the tank.
2.2
PLUMBING FIXTURE
Tanks are connected to plumbing fixtures as shown in Figure 5.
For potential disconnection
of the tank, utility water inlets and outlets must be provided with Js 3/4“ screw coupling.
If
the hot utility water (HSW) distribution is equipped with circulation circuit, the reverse pipe
is connected to the inlet identified as CIRCULATION.
The 100, 125, 160 NTR and 100, 125
NTR / HV types are equipped with a discharge outlet.
The tank shall be equipped with safety
valve to ensure operation.
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.
Safety valve shall be easily accessible, fitted as close as possible to the tank.
Supply piping shall have minimum inside diameter identical with that of 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 is the
maximum pressure in the water main (Table 2).
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 assembly, follow the guide provided by the
safety equipment manufacturer.
