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Hydraulic connection
Before installing the water heater, check the pressure of the inlet water pipe, (see the proper values reported in the
schemes pag.3-4). If the pressure is higher than the highest value, we suggest the interposition of a pressure reducer
valve between the water heater of the inlet pipe which has to be placed as far as possible from the device. The ideal
position is near the meter.
The overpressure valve provided with the heater must be screwed on the entry hitch of cold water heater. Avoid any
tampering as the valve is set in the factory according to the characteristic functions of the water heater (intervention in
the stages of water temperature's variation). In the heating stage a light leakage of the valve is normal; for this reasons
we suggest the connection of the valve with a drain. If the dripping persists:
1) check or install a pressure reducer as far as possible from the water heater (near the meter);
2) install in the sanitary circuit an expansion tank for alimentary use, whose capacity have to be at least a 10% of the
total one of the product.
The connection for water exit is placed on the opposite side of cold water entry. The water connection must be carried
out with pipes a suitable for drinking water conduction.
Note: use a proper overpressure valve connection system. Follow the correct direction, fixed by regulations in force and
with any possibles rules of the local authority responsible for water supply.
Note: The water drain from the overpressure valve may take place even without notice. Therefore we advise to connect
the valve with a drain.
Note: If the water is particulary hard and in the system there is a water softener, it is compulsory to the warrenty: 1) To
check that the hardness values aren't lower than 22° F and higher than 28° F. 2) Install a polyphosphates doser.
Treatments have to be in keeping with UN CTI 8065 regulations. Please contact a qualified company to this aim.
Note: Only valid for countries which have enacted EN 1487: Between the appliance and the hydraulic network the
installer must install a hydraulic safety unit in conformity with EN 1487, not supplied with the appliance.
IMPORTANT: The overpressure safety device supplied with the water heater is an overpressure valve, not a hydraulic
safety unit.
Boschetti Industrie Meccaniche srl
D
C
B
A
Picture 4
A - Warm water exit
B - Cold water entry
C - Overpressure valve
D - Valve drain
7
IT
Ver. 01/2018
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