Lennox FCA 60

Page 48 - IOM / ROOF-TOP FLEXY™ Series
GAS BURNERGAS BURNER
GAS BURNERGAS BURNER
GAS BURNER
Type of Gas Category Supply pressure Low heat injection High heat injection
adjustment pressure pressure
Honeywell Valve adjustment adjustment
Natural GAZ G20 20.0 mbar 3.5 mbar 8.4 mbar
Natural GAZ G25 (Groningue) 25.0 mbar 5.0 mbar 12.3 mbar
Propane G31 (GPL) 37.0 mbar 14.0 mbar 31.4 mbar
4. Burner safety checks
4.1 Smoke extractor pressure switch test
- With the gas burner running, disconnect the flexible tube fitted to the pressure
taping on the smoke box (figure 53).
- The Flame must disappear and the fan must carry on running.
- However, NO fault will be displayed (HONEYWELL control block or
CLIMATIC™).
- After reconnecting of the tube, the burner will restart after 30 seconds of pre-
ventilation.
4.2 Gas pressure switch test
- With the gas burner running, close the internal shut off valve in the rooftop.
- The burner stops completely.
- However, No fault light will be displayed on the Honeywell Control box.
- After 6 Minutes, the CLIMATIC 2 will display fault 14 or 15.
- Reset the CLIMATIC™ 2.
4.3 Ionisation probe test
- With the gas burner running, disconnect the RAJAH terminal plug.
- The flame disappears
- The fan is still running and attempting to restart the burner (restart cycle 45
seconds).
- At the end of the restart cycle the burner stops completely.
- The fault light on the HONEYWELL Block is ON.
- Manually reset the HONEYWELL controller to eliminate the fault. (Refer to
§2).
Figure 52
Figure 53
Figure 54
Then re-tighten all pressure adjustment screws.
3.8 Rating table for type of gas and corresponding adjusmtent pressure