ENGLISH
18 / 35
0006081444_201610
ADJUSTING THE AIR CONTROL PRESSURE SWITCH IN
SECOND STAGE.
Put the burner into second stage operation and increase the air
pressure switch setting (see chapter “Air pressure switches”) until
the burner goes into lock-out.
Adjust the setting of the pressure switch to a level slightly below
the actual air pressure detected.
Release the burner and check that it operates correctly in second
stage.
GAS CONTROL PRESSURE SWITCHES
The gas pressure control switches (minimum and maximum)
prevent the burner from operating when gas pressure does not lie
between the expected range.
The minimum value pressure switch makes use of the NO
(normally open) contact which is closed when the pressure switch
detects a pressure higher than its own setting.
Adjustment of minimum and maximum pressure values on the
pressure switches must be performed when testing the burner, on
the basis of the pressure measured in each case.
The triggering (opening of the circuit) of any of the pressure
switches when the burner is running (flame on) causes the burner
to stop immediately.
When first switching on the burner it is essential to check that they
work properly.
Check the triggering of the flame detector (ionisation electrode).
Disconnect the jumper between terminals 30 and 31 on the printed
circuit board and switch on the burner.
The equipment must run through its cycle completely and, three
seconds after the ignition flame has formed, “lock-out”.
This check must also be carried out when the burner is already on.
Disconnecting the 30 and 31 jumper, the equipment must
immediately go into its “lock-out” action.
Check the efficiency of the thermostats or boiler pressure switches
(they should shut down the burner when triggered).
CAUTION / WARNINGS
Check that the ignition takes place properly. In the event that
the mixer is too far forward, it may happen that the speed
of the delivery air is so high that ignition is difficult. If this
happens, the mixer must be gradually shifted back until it is
in a position in which ignition occurs normally, and this new
position can be regarded as the final position.We remind
you that is preferable, in the case of the small flame, to limit
the quantity of air to the lowest amount possible needed for
safe ignition, even in the most difficult circumstances.|bb|
Summary of Contents for TBG 45 PV
Page 2: ......
Page 36: ...ITALIANO 34 35 0006081444_201610 SCHEMI ELETTRICI...
Page 71: ...ENGLISH 34 35 0006081444_201610 WIRING DIAGRAMS...
Page 73: ......
