Aluminum Furnace Maintenance - Troubleshooting the Burner and Flame Safety System

ALUMINUM HEAT PROCESSING NEWS

Aluminum Furnace Maintenance Tips

Troubleshooting the Burner and Flame Safety System

Since this is a combination electronic and electromechanical system, malfunctions will occur from time to time. Troubleshooting any breakdown should follow a logical and definite sequence of tests to isolate the problem. Only qualified personnel should attempt to service this equipment.

If trouble occurs, the following chart will help locate the problem and suggest what corrective action should be taken.

PROBLEMS	CAUSE	REMEDY
Burner will not light during adjusting procedure.	No combustion air	Start blower
	Incorrect air pressure at burner	Check rotation of blower (arrow on housing)
		Clean blower filter
		Adjust limiting orifice
	Low or no gas pressure to burner regulator	Open manual gas valves
		Incorrect or damaged wiring to solenoid
		Replace solenoid if burned out
		Check incoming gas pressure against drawings
	Gas pressure too high to burner	Adjust gas valve
	Gas pressure too high to burner	Repair or replace pressure reducing regulator
	No spark at plug (short top of spark plug to furnace to check)	Incorrect or broken wiring
		Defective transformer
		Dirty spark plug tip (set gap at manufacturers recommendations)
No flame after burner has been adjusted and unit is operating on flame safeguard	Flame relay not reset	Push reset button after 30 second delay to allow cooling of warp switch
	No power on terminal 6 of flame relay	Power not on
	No power on terminal 6 of flame relay	Interlocks not made
	Loose terminal screws	Tighten as required
	U.V. flame detector not sending signal to flame relay	Remount or adjust detector to sight flame
	U.V. flame detector not sending signal to flame relay	Clean U.V. tube lens
	Flame not being detected by flame safeguard	Flame does not fill entire U.V. sight area	Return to burner adjust procedure and reset burner
		No U.V. signal being sent	Clean U.V. detector tube

A good flame should be full bodied, blue in color, and long enough to just turn the bend in the radiant tube. It must burn long enough to establish incandescence in the burner tile and tube before the flame will be stable enough to fine tune and make a final adjustment.

The latest design, materials and equipment specifications should be obtained from the company before any reliance is placed on the enclosed since changes may occur due to product improvement.

P. O. Box 908 180 Mercer Street Meadville, PA 16335-6908 USA
Phone (814)332-8400 - Fax (814)724-1407
info@secowarwick.com

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