Roberts Gorden 300 Burner Observation, Window, Flue Blower Scroll, Wheel, and Motor, Orifices

COMBAT® UHA UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Burner Observation	Make sure it is clean and free of cracks or holes.
Window	Clean and replace as required.
Flue Blower Scroll, Wheel	Compressed air or a vacuum cleaner may be used to clean dust and dirt.
and Motor
Inshot Burners and	Clear of obstructions (even spider webs will cause problems).
Orifices	Carefully remove any dust and debris from the burner.
Direct-Spark Igniter	Replace if there are cracked ceramics, excessive carbon residue, or erosion
	of the electrode.
	The electrode gap should be 1/8" (3.2 mm).
Thermostat	There should be no exposed wire or damage to the device or wiring.
	See Page 19, Section 10.
Suspension Points	Make sure the heater is hanging securely.
	Look for signs of wear on the suspension materials or ceiling.
	See Page 6, Figure 2.
Silicone Tubing	Ensure tight, secure fit on all pressure fittings at pressure switch,
	burner partition, and blower outlet.
Gas Valve	Verify that cap covering pressure regulator adjustment screw is secure and
	has not been tampered with.
	Verify all wiring connections.
Condensate Drain	Flush drain and clear any obstructions.
(when installed)

26