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NVB Series B-Vent Gas Fireplace
7412950
LG148
NVB42
log set
1/30/01 djt
Left Rear
Log
Left Cross
Log
Middle Cross
Log
Right Cross
Log
Right Rear
Log
Ember
Left Log
Embers
Grate
Lava Rock
Ember
Right
Fig. 16 NVB42 log placement.
LG148
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
check of the pilot and the burner flames.
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
and constructed to develop a positive flow
adequate to remove flue gases to the out-
side atmosphere.
Any foreign objects in the venting system,
except those designed specifically for the
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.
L
O
H
I
Turn
counterclockwise
to increase
flame height
Turn clockwise
to lower
flame height
FP390
FLAME ADJUSTMENT KNOB
11/21/96
Fig. 17 Flame adjustment knob for SIT820 valve.
Fig. 18 Proper pilot flame height.
FP581
3/8"-1/2"
FP581
NVB-PILOTS
12/4/97
NOVA SIT PILOT
ELECTRONIC
IGNITION