Desa BG 110, Technical Information, Installation And Operating Instructions

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ANOMALY CAUSES REMEDIES
THE BURNER GOES OUT
ANOMALOUSLY AND BY CHANCE Actuation of the LIMIT thermostat Check the aperture of the air flow direction
control vanes
Check for the absence of obstructions on the
air inlets
Check the fan motor
Flame detaches from burner
Check burner settings
Check that the generator is not in a room
subject to pressure drop
Room thermostat not correctly
installed Check that the sensitive element of the room
thermostat is not in the flow of hot air from
the generator
LIMIT THERMOSTAT OPERATES Obstructions in the air circuit
Check that the airflow control vanes are
open
Check for the absence of obstructions on the
air inlet grilles
Hot air backflow Check the aperture of the airflow control
vanes so that there is no backflow of hot air
to the inlets.
Check the temperature of the inlet air
Fan assembly to be checked or faulty
Check that the fan rotor is clean
Check the efficiency of the fan motor
Check the state and tension of the belts
(three-phase version only)
Check for anomalous action of the motor
thermal cut-out (three-phase version only)
Excess thermal power Check the settings of the oil burner
FAN MOTOR THERMAL CUT-OUT
ACTUATES (ONLY FOR THREE-
PHASE VERSIONS) Excess current intake and/or heating
of the fan motor
Check that the air distribution plenum is
installed
Check the electric supply voltage
Check the inlet air temperature
THE FAN DOES NOT START WITHIN
APPROX A MINUTE AFTER BURNER
IGNITION Insufficient thermal power Check the oil burner settings
Double thermostat FAN-LIMIT to be
checked or faulty
Check the FAN settings
Replace the double thermostat FAN-LIMIT
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