Lennox BAC 024 SNM 3M, Installation, Operating And Maintenance Manual

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BALTIC-IOM-0412-E / Service manual
GAS BURNERS
Burner safety checks
Smoke extractor pressure switch test
• with the gas burner running, disconnect the fl exible tube fi tted
to the pressure taping on the pressure switch.
• the fl ame must disappear and the extraction fan must carry
on running.
• however, no fault will be displayed (gas ignition control block
or CLIMATIC™).
Ionisation probe test
• with the gas burner running, disconnect the terminal plug
coming from the ionisation probe to the gas ignition control box.
Gas pressure switch test
• with the gas burner running, close the shut off valve located
before the rooftop.
• the fl ame disappears
• the fan is still running and attempting to restart the burner
(restart cycle 30 to 45 seconds).
• if the ignition probe is not reconnected at the end of the ignition
sequence the burner will stop completely.
• the fault light on the gas ignition control block is on.
• manually reset the gas ignition control block to eliminate the
fault
In case of problems refer to the start up sequence fl owchart
next page
• the burner stops completely.
• however, no fault light will be displayed on the gas ignition
control block. After 6 minutes, the CLIMATIC™ will display a
fault.
• reset the CLIMATIC™.
• after reconnecting of the tube, the burner will restart after a
period of 30 to 45 seconds pre-ventilation.