Vermont Casting NVBR36 First Firing, Flame Adjustment, Flame Characteristics, Turn, to lower

NVB Series B-Vent Gas Fireplace

Middle Cross

Log

Left Cross

Log

Left Rear

Log

Ember

Left Log

Lava Rock

LG148

Fig. 16 NVB42 log placement.

Under no circumstances should lava rock be placed on any part of the burner assem- bly.

First Firing

Upon completing the gas line connection, a small amount of air will be trapped in the line. When first lighting the unit with pilot light, it will take a few minutes to purge the trapped air. Once purging is complete, the pilot and burner will light and operate as indicated in the instruction manual. Subsequent lightings of the appli- ance will not require purging.

When lit for the first time, the appliance will emit a slight odor for an hour or two. This is due to paint and lubri- cants used in the manufacturing process. After each lighting, vapor may condense and fog the glass; this moisture disappears in a few minutes of burning.

Flame Adjustment

For units equipped with Hi/Lo valves, flame adjustment is accomplished by rotating the Hi/Lo adjustment knob located near the center of the gas control.

	Flame Characteristics
	It is important to periodically perform a visual
Right Cross	check of the pilot and the burner flames.
Log	Compare them to the illustrations below
	(Figs. 18, 19, 20). If any of the flames ap-
	pear abnormal call a service person.

	Inspecting the Venting System
	The appliance venting system was designed
Right Rear	and constructed to develop a positive flow
Log	adequate to remove flue gases to the out-
	side atmosphere.
Ember	Any foreign objects in the venting system,
	except those designed specifically for the
Right	venting system, may cause spillage of flue
	gases (i.e.: carbon monoxide) into the room.
	To inspect the venting system, make sure
	the main gas valve is off. Remove the glass
	panel. Using a flashlight, check the combus-
	tion dome and behind the top grille. Clean if
	necessary.
Embers
Grate

Turn		Turn clockwise
counterclockwise	H
	I	to lower
to increase	L
	O	flame height
flame height
Fig. 17 Flame adjustment knob for SIT820 valve.
NOVA SIT PILOT		ELECTRONIC
		IGNITION

3/8"-1/2"

FP581

Fig. 18 Proper pilot flame height.

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