Hearth and Home Technologies CD4842R, CD4842ILR, CD4842LR Symptom Possible Cause Corrective Action

A. Standing Pilot Ignition System (continued)

Symptom	Possible Cause	Corrective Action
3. (Continued)	C. Failed valve.	Turn the valve knob to the ON position. Place the ON/OFF switch
		in the ON position. Check the millivolt meter a the thermopile
		terminals. The millivolt meter should read greater than 125mV. If the
		reading is acceptable, and if the burner does not come on, replace
		the gas valve.
	D. Plugged burner orifice.	Check the burner orifice for stoppage. Remove stoppage.
	E. Wall switch or wires.	Check the wall switch and wires for proper connections. Place the
		jumper wires across the terminals at the wall switch. If the burner
		comes on, replace the wall switch. If the wall switch is OK, place
		the jumper wires across the wall switch wires at the gas valve. If the
		burner comes on, the wires are faulty or connections are bad.
4. Frequent pilot outage	A. Pilot flame may be too high or	Clean thermocouple and adjust the pilot flame for proper flame
problem.	too low, or blowing out (high	impingement. Follow lighting instructions carefully.
	pressure), causing pilot safety
	to drop out.
5. The pilot and main	A. No LP in tank.	Check the LP (propane) tank. Refill the fuel tank.
burner extinguish while in
	B. Improper gas inlet pressure.	Verify with manometer. NG should read 5-14 inches w.c. LP should
operation.
		read 10-14 inches w.c.
	C. Inner vent pipe leaking exhaust	Check venting system for damage. Replace/repair improperly
	gases back into the system.	assembled pipe sections.
	D. Glass installed improperly.	Check to ensure glass is installed properly. Replace glass panel
		assembly.
	E. Failed thermopile or	Replace pilot if necessary.
	thermocouple.
	F. Improper vent cap installation.	Check for proper installation and freedom from debris or blockage.
6. Glass soots.	A. Flame impingement.	Adjust the log set so that the flame does not excessively impinge on
		it. Refer to log instructions.
	B. Improper air shutter setting.	Refer to manual for shutter set points. Ensure that set point is
		correct for appliance/gas type. If unit has adjustable shutter, it may
		be necessary to increase shutter opening.
	C. Debris around air shutter.	Inspect the opening at the base of the burner. NO MATERIAL
		SHOULD BE PLACED IN THIS OPENING.

58 Heatilator • Caliber CD Series • 4040-263 Rev N • 11/08