Pilot goes out while Gas piping is undersized

Unit is over-ﬁ red or under- ﬁ red.

	SYMPTOM	PROBLEM	TEST SOLUTION

Pilot goes out while		Gas piping is undersized.	- turn on all gas appliances and see if pilot ﬂ ame ﬂ utters, diminishes or
standing; Main			extinguishes, especially when main burner ignites. Monitor appliance
burner is in ‘OFF’			supply working pressure.
position.			- check if supply piping size is to code. Correct all undersized piping.
Main burner will not		Inlet pressure too high.	Adjust inlet pressure to ensure maximum 7.0” W.C. at gas valve for
light, or is slow to			Natural gas and 13.0” W.C. for Propane.
		Pilot ﬂ ame blowing off, miss-
light; noisy pilot.		ing thermopile.

Flames are consist- ently too large or too small. Carbon- ing occurs.

- check pressure readings:

Inlet pressure can be checked by turning screw (A) counter-clockwise 2 or 3 turns and then placing pressure gauge tubing over the test point. Check with burner operating on “HI”. Gauge should read 7” (minimum 4.5”) water column for natural gas or 13” (11” minimum) water column for propane.

Outlet pressure can be checked the same as above using screw (B). Check with burner operating on “HI”. Gauge should read 3.5” water column for natural gas or 10” water column for propane.

AFTER TAKING PRESSURE READINGS, BE SURE TO TURN SCREWS CLOCKWISE FIRMLY TO RESEAL. DO NOT OVERTORQUE.

Leak test with a soap and water solution.

Carbon is being de-		Air shutter has become	-	ensure air shutter opening is free of lint or other obstructions.
posited on logs or		blocked
combustion cham-
combustion cham-		Flame is impinging on the	-	check that the logs are correctly positioned.
ber surfaces.		Flame is impinging on the	-	check that the logs are correctly positioned.
		logs or combustion cham-	-	*open air shutter to increase the primary air. See air shutter open-
		ber.	-
		ber.	ings, page 13.
			ings, page 13.
			- check the input rate: check the manifold pressure and oriﬁ ce size as
			speciﬁ ed by the rating plate values.
Exhaust	fumes	Not enough combustion air.	- increase fresh air supply. (Use one of the methods described in ANSI
smelled in	room,		Z223.1 Section 5.3 or the applicable local code.)
headaches.		Not enough ventilation air.	- increase fresh air supply. (Use one of the methods described in ANSI
		Not enough ventilation air.
			Z223.1 Section 5.3 or the applicable local code.)

		Flame is impinging on the	-	check that the logs are correctly positioned.
		logs or combustion cham-	-	open air shutter to increase the primary air. See air shutter open-

ber.	ings, page 13.

-check the input rate: check the manifold pressure and oriﬁ ce size as speciﬁ ed by the rating plate values.

Remote wall switch	Wall switch is mounted up-	- reverse.
is in “OFF” position;	side down
main burner comes	Remote wall switch is ground-	- replace.
on when gas knob	ing.
is turned to “ON”
is turned to “ON”	Remote wall switch wire is	- check for ground (short); repair ground or replace wire.
position.	Remote wall switch wire is	- check for ground (short); repair ground or replace wire.
position.	grounding.
	grounding.
	Faulty valve.	- replace.

* Check for ceiling or oscillating fans that maybe inﬂ uencing the ﬂ ame.

W415-0298 / K / 12.06.07

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SYMPTOM

Pilot goes out while

Gas piping is undersized.

W415-0298 / K / 12.06.07

CVF36N, CVF36P specifications