ENGLISH
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0006081041_201809
NATURAL GAS IGNITION AND
REGULATION
•
Make sure that the mains voltage corresponds to the
manufacturer's requirements and that all electrical connections
made at the installation site are effected properly as illustrated in
our wiring diagram.
•
Check that there is water in the boiler and that the gate valves of
the system are open.
•
Make sure that the combustion products may be freely vented
through the boiler and flue dampers.
•
Check that all the gate valves fitted on the fuel suction and
return pipes are open; the same applies to any other fuel shut-off
devices.
•
Check that the voltage of the electrical line corresponds to that
required by the burner, that electrical connections, motor and
main line are prepared for the voltage available. It is necessary
to completely open the safety valve flow rate regulator, if any.
•
Check that all electrical connections made on-site are performed
correctly as shown in our wiring diagram.
• To prevent ignition of the second stage, turn the switch on the
printed circuit to the 1st stage position.
•
Regulate the air flow of the 1st stage flame using the adjustment
cams of the electric servomotor mentioned below.
• Use the gas valve regulation device to open the regulator for the
1st stage supply as necessary. See the instructions for the two-
stage gas valve installed on the burner.
•
With the switch on the burner panel set to “0” and the main switch
on, manually close the contactor and check that the motor rotates
in the right direction. If necessary, swap the two power cables for
the motor around to change the direction of rotation.
CAUTION / WARNINGS
The burner is equipped with a switch on the printed circuit to
change from the 1st to the 2nd stage.
FIRST IGNITION POWER ADJUSTMENT
•
Now turn on the burner panel switch START/STOP switch. The
control equipment is powered and the programmer activates
the burner as described in the chapter “Operation description”.
During pre-ventilation, make sure that the air pressure switch
changes its status. If the air pressure switch does not detect
sufficient pressure, the ignition transformer is not switched on,
nor are the gas valves, therefore the equipment “locks out”.
•
During the first ignition several “lock outs” may occur due to the
following reasons:
•
The gas piping has not been bled from air correctly and so there
is not enough gas to provide a stable flame.
•
A “lock out” with flame presence could be caused by flame
instability due to an incorrect air/gas ratio. This can be solved
by changing the amount of air and/or gas supplied, so as to find
the right ratio. The same problem may be caused by incorrect
air/gas distribution in the combustion head. This can be solved
through the combustion head adjustment device, by closing or
opening further the air passage between combustion head and
gas diffuser.
•
It may occur that the ionisation current is disturbed by the
discharge current of the ignition transformer (the two currents
have a common path on the burner’s “mass”). Therefore, the
burner locks out due to an insufficient ionisation. Invert the
supply (230V side) of the ignition transformer.
•
Another lock-out cause might be caused by an insufficient
“ground connection” to the burner’s casing.
•
With the burner working at the minimum output it is necessary to
visually check the extent and aspect of the flame and implement
any necessary correction by working on the regulators for gas
and air supply (see previous points).
•
Subsequently a check is carried out on the quantity of gas
supplied, by reading the meter.
•
If necessary correct the gas output and the relevant combustion
air by acting as previously described.
•
Then check the combustion with suitable instruments.
3
4
6
2
8
7
1
5
sinotticoTBG85P
1 Main switch ON/OFF
2 Thermostat on indicator light
3 Fan motor indicator light
4 Ignition transformer indicator light
5 1st stage gas valve light
6 2nd stage gas valve light
7 Unlock button
8 Lock indicator light
Summary of Contents for TBG 85P
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