baltur BTG 3 Instruction Manual For Use page 33

• Control the efficiency of the safety devices: the "shut down"
(by detaching the ionisation electrode cable), the air pressure
switch, the gas pressure switch, the gas pressure switch and
the thermostats).
The pressure switch is self-controlled and trefore it must
close the contact, which is foreseen to be closed at rest, (fan
stops and consequently there is an absence of air pressure in
the burner); if it does not, the control box will not be inserted
(the burner remains at as standstill). It must be specified that
if the contact is not closed during working, the control box
will carry out its cycle, but the ignition transformer will not
be inserted and the gas valves will not open. Consequently,
the burner will go to shut down. Check that the air pressure
switch functions properly with burner operating, increase
the regulating value until it reaches intervention point and
the burner should go to shut down. To ublock the burner,
press the special pushbutton and return the pressure switch
regulator to a sufficient value in order to measure the air
pressure existing during the pre-ventilation phase.
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