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30 High Efficiency Propeller Fan Gas Unit Heater • GHND-SVX01A-EN
Operation
Figure 18. Burner components
BURNER DRAWER COMMON PARTS CONTROLS:
1 Main Burners 8. Main Gas Valve (Honeywell)
2 Burner Manifold 8B. Main Gas Valve (White Rodgers)
3 Air Shutters 9 Ignitor
4 Burner Springs 10 Pilot Burner
5 Main Burner Orifice 11 High Limit, this safety device is located on the rear header
plate of the heat exchanger (air inlet side).
6 Transformer 12 Blocked Vent (Spill) Switch, this safety device is located in
the upper right corner of the right jacket panel.
7 Pilot Tubing