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off device. (fig.2-C)
If the main supplying pressure is close to 0,4MPa (4 bar) is recommended the installation of a pressure
reducer on the outlet of the water meter and in any case as far as much is possible form the water
heater.
A pressure reducer installed close to the appliance (below 10 m) require the installation of an
expansion vessel on the inlet tube of cold water next the appliance.
During the heating phase a slight drip of the safety valve is quite normal due to the increase of
pressure into the boiler. Hence is necessary to connect the drain outlet of the valve ( fig.2) to a drain
pipe installed inclined continuously downward, place without condensation and always open. The
safety valve against overpressure should be operated regularly in order to remove lime scale and
verify the correct operation. Connect the outlet tube of the boiler with red collar to the services by
flexible pipe.
1.3
Electrical connection
If the appliance is not equipped with electrical cable is necessary connect it to the main electrical
supply with rigid cable for fix connection. Before connect the appliance verify that the supply
tension is right with the appliance value.
In the electric power supply circuit of the water heater must be fitted with a device assuring the
interruption of all poles in the conditions of overvoltage category III.
The electrical circuit supplying the appliance must have an in-built device ensuring the
splitting of all terminals poles under conditions of super-voltage category III.
The connection must be done according to the wiring diagram:
R = electric heating element S1, S2 = thermostat contacts
TS = thermostat safety device TR = contact operated
L-N = power supply line SP = indicator light
L1, L2 = electric line connection terminals
= earth
To install the power supply wire to the boiler remove the plastic cover and insert the wire in the hole
on the plastic cap.
The electrical connection is carried out directly to the clamps ( Fig. 4-5 L/N ) of the thermostat.
To disconnect the unit form the main electrical supply use a bipolar switch conform to EN-IEC
standards (contact opening at least 3 mm, better if equipped with fuses). The earth connection is
mandatory and the earth cable (must be yellow-green and longer than that of the phases) is fixed to
the terminal marked by symbol
.
After the installation, put the plastic cover back in its place.
2.
PUTTING IT INTO SERVICE AND TESTING
Before connecting the electrical supply, ll the appliance with water. To do this open the main tap of the
plumbing system and then open the hot water tap. Expect the discharge of water form hot water tap
and hold for few seconds in order to permit the discharge of the air inside the pipes. Check carefully for
even- tually leak. Close the hot water tap and switch on the electrical supply.
3.
USER INSTRUCTIONS (by the user)
WARNING.
Follow the general warnings and the safety norms listed at the beginning of the text and
Summary of Contents for BAMEMA150-D
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