Gas Log Set Installation

17
NBST27 Unvented Gas Log Set
Monessen • NBST27 Gas Log Set Installation/Owner's Manual • 81D3032 • Rev A • 08/16
FLAME APPEARANCE
9. Place log #9 on farthest right grate tine by aligning ‘V’
notch in bottom of log with grate tine. Place rectangu-
lar notch in bottom of log onto rectangular protrusion
on log #8. Figure 25
LG657
NBST Log 8
Log #8
Figure 24 -
Place Log #8
LG658
NBST log 9
Log #9
Figure 25 -
Place Log #9
LG659
NBST Log 10
Log #10
Figure 26 -
Place Log #10
10. Place log #10 by aligning two (2) rectangular notches
on bottom of log with rectangular protrusions on logs
#6 & #7. Make sure the ember or ‘burnt’ area of log is
facing center of burner. Figure 26
FLAME APPEARANCE
Flames from the pilot, front and rear burner should be
visually checked as soon as the heater is installed.
Inaddition,periodicallychecktheamesvisuallyduring
operation.
CHECK THE PILOT FLAME
The pilot ame must always be present when the
heater is in operation. It should just touch the top of the
thermocouple tip for natural. Refer to Figure 27 for correct
pilotame.
Ifthepilotamedoesnottouchthethermocouple,thenthe
main burner cannot function reliably. Figure 28 for incorrect
shapeofpilotame.
Figure 27 -
Correct Pilot Flame
Appearance
FP2273
pilot bad flame
Thermo-
couple for
Natural Gas
Thermo-
couple
for LP
Figure 28 -
Incorrect Pilot Flame
Appearance
LG661
NBST log flames
CHECK BURNER FLAME APPEARANCE
Innormaloperationatfullrateafter15minutes,theames
should appear as shown in Figure 29.
Theamesshouldbeyellowandextend3-4”abovethe
logtop surfaces.The yellow ames shouldnot impinge
on the logs.
Figure 29 -
Correct Burner Flame Appearance
FP2272
pilot correct flame
Thermo-
couple
for LP
Thermo-
couple
for
Natural
Gas