Lennox Baltic BHK 070 - Page 73

Page 72 - IOM / ROOFTOP BALTIC Series - 0704 - E
HEATING : gas burner
BURNER SAFETY CHECKS
Smoke extractor pressure switch Test.
- With the gas burner running, disconnect the flexible tube
fitted to the pressure taping on the pressure switch (fig.
22).
- The Flame must disappear and the extraction fan must
carry on running.
- However, NO fault will be displayed (Gas ignition control
block or CLIMATIC).
- After reconnecting the tube, the Burner will restart after a
period of 30 to 45 seconds pre-ventilation.
Gas pressure switch test
-With the gas burner running, close the shut off valve
located before the rooftop (fig. 23).
-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.
Ionisation Probe test
-With the gas burner running, disconnect the terminal plug
coming from the ionisation probe to the gas ignition control
box.
-The flame 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 SE-
QUENCE FLOWCHART NEXT PAGE
Fig. 22
Fig. 23