baltur TBML 350 ME Installation, Use And Maintenance Instruction Manual page 61

ELECTRICAL CONNECTIONS
• It is advisable to make all connections with flexible electric wire.
• Electrical lines must be kept away from hot parts.
• The burner installation is allowed only in environments with
pollution degree 2 as indicated in annex M of the EN 60335-
1:2008-07 regulation.
• Make sure that the electric line to which the unit will be connected
has frequency and voltage ratings suitable for the burner.
• The three-phase or single-phase power supply line must have
a switch with fuses. The standards also require a switch on the
burner's power line located outside the boiler room where it can be
accessed easily.
• The main line, the relevant switch with fuses and the possible
limiter must be suitable to support the maximum current absorbed
by the burner.
• The mains supply connection requires an omnipolar switch with a
contact opening gap equal to or greater than 3 mm in accordance
with current safety regulations.
• Refer to the wiring diagram for electrical connections (line and
thermostats).
• Unsheathe the external insulating cover of the power cable to the
necessary extent for the connection, thus avoiding the wire from
coming into contact with metal parts.
• In case of unbalanced 230V phase-phase mains supply systems,
the voltage between the flame detector electrode and earth might
not be enough to ensure the correct operation of the burner. The
problem is eliminated using the isolation transformer type AR1
code 0005020028 which must be connected as shown in the
following diagram.
AR 1
Ph
L (1) ION IN
Ph 230
IN (2) ION PROBE
ION
15 / 44
0006160077_201802
AUXILIARY PUMP
In some cases (excessive distance or differences in level) the system
must be implemented with a "loop" supply circuit with an auxiliary
pump, avoiding to connect the burner pump directly to the tank.
In this case, the auxiliary pump can be started when the burner starts
and stopped when it stops.
The electrical connection of the auxiliary pump is made by connecting
the coil (230V), which controls the pump remote control switch, to
terminals "N" (input terminal board of the equipment) and "L1"
(downstream the motor remote control switch).
It is important to comply strictly with the previsions set forth here
below:
• The auxiliary pump must be installed as close as possible to the
liquid to be sucked.
• The head must be suitable for the relative plant.
• We recommend a flow rate that is at least equal to the flow rate of
the burner pump.
• Connection pipes should be sized to cope with the delivery rate of
the auxiliary pump.
• Absolutely avoid electrically connecting the auxiliary pump directly
to the contactor of the burner.
ENGLISH