Electrical Connection - DAB BMH Serie Instrucciones Para La Instalación Y El Mantenimiento

6.3 Install the circulator as high as possible above the minimum level of the boiler, and
as far as possible from bends, elbows, derivations, as they could cause turbulence in
the water entering the circulator, with consequent noisy operation.
6.4 To facilitate control and maintenance operations, install an on-off valve on both the
intake and the delivery pipe.
6.5 Fit the circulator on the system only after having completed the welding jobs.
6.6 Before installing the circulator, accurately flush the system with only water at 80°C,
Then completely drain the system to eliminate any harmful substance that may have
got into circulation.
Always fit the circulator with the motor shaft in a horizontal position
(fig. 4).
6.7
Assemble it in such a way as to avoid the dripping of water onto the water and onto
the terminal board during both installation and maintenance.
6.8 Avoid mixing hydrocarbon-derived additives and aromatic products with the
circulating water. The addition of antifreeze, where necessary, must not exceed the
maximum of 30%.
6.9
Caution!! in the presence of thermal insulation, ensure that the holes for discharging
condensate from the motor casing are not closed or partly blocked (fig. 3).
7.

ELECTRICAL CONNECTION:

Caution: always follow the safety regulations!
Scrupulously follow the wiring diagrams on page 3.
7.1
The electrical connections must be made by a skilled, authorised electrician,
who assumes all the responsibility.
7.2 Ensure that the mains voltage is the same as the value shown on the motor data
plate and that it is possible to MAKE A GOOD EARTH CONNECTION.
7.3 In fixed installations, International Standards require the use of insulating switches
with a fuse-carrier base.
7.4 All the single-phase motors are provided with built-in overload protection and they
may be connected directly to the mains. All the three-phase motors have a built-in
probe for connection to the external protection relay and to the environment
thermostat as indicated on page 3. (to be connected by the user.)
7.5 When making the electrical connection to the supply line, fit a two-pole switch (M
single-phase versions), three-pole or four-pole if there is a neutral lead (T three-
phase versions) with contact opening distance of at least 3 mm, and with AM type
fuses (motor start) with a suitable current value for the motor that is to be fed.
7.6 After making the electrical connection of three-phase circulators, before filling the
system, always check the direction of rotation of the motor, unscrewing the breather
cap and letting the cap run for a few seconds.
7.7
If the motor is turning in the opposite direction to the arrows on the motor plate, this
indicates an incorrect electrical connection.
7.8
To connect the motor protector to the outside of the terminal box, it is necessary to
drill a hole in the box at the level of the niche and to apply a cable grommet (not
supplied as standard).
7.9 For the connection between the motor and the terminal box, follow the diagram on
page 4. ATTENTION: the bundle of cables for group N°1 must be connected to the
respective connections of group N°1 on the terminal box. The coloured cables in the
bundles must be connected to the connections marked with the respective colour.
ENGLISH
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