Flame Appearance; Check The Pilot Flame; Operating Instructions - Monessen Hearth NB24 Installation And Operating Instructions Manual

NB18/NB24 Gas Log Set
Flames from the pilot and burner should be visually
checked as soon as the heater is installed. In addition,
periodically check the flames visually during operation.

CHECK THE PILOT FLAME

The pilot flame 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 49 for correct
pilot flame.
If the pilot flame does not touch the thermocouple, then the
main burner cannot function reliably. Figure 50 for incorrect
shape of pilot flame.
Thermocouple
for Natural
Thermocouple
for LP
Figure 49-
Correct Appearance of Pilot Flame
Thermocouple
for Natural
Thermocouple
for LP
Figure 50 -
Incorrect Appearance of Pilot Flame
In normal operation at full rate after 15 minutes, the
following flame appearances should be observed:
Burner will have a random pattern of yellow flames as
shown in Figure 51. There should be glowing embers on
the front burner. NOTE: The front flames and embers will
be an opaque orange color during the burn off time.
CAUTION: After a 15 minute pre-heat period, observe all
yellow flames to ensure there is no impingement with any
log. If any yellow flame is contacting any log, turn off log
set and allow to cool. Remove all logs and carefully rein-
Monessen • NB18/24 Gas Log Set Installation/Owner's Manual • 81D0107 • Rev E • 04/18
FP2272
pilot correct flame
FP2273
pilot bad flame
Figure 51 -
Correct Appearance of Rear Flames for Berkley Oak
stall following log placement instructions precisely. Relight
burner and check again for impingement of any flame on
log. If flame impingement cannot be eliminated, contact
your installer or dealer for assistance. Flame impingement
on logs may create soot and possible property damage.

OPERATING INSTRUCTIONS

Avoid any drafts that alter burner flame patterns. Do
not allow fans to blow directly into the fireplace. Do not
place a blower inside the burn area of the firebox. Ceiling
fans may create drafts that alter flame patterns. Sooting
and improper burning will result.
During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain oils,
films or bonding agents. These chemicals are not harmful,
but may produce annoying smoke and smells as they are
burned off during the initial operation of the appliance,
possibly causing headaches or eye or lung irritation. This
is a normal and temporary occurrence.
The initial break-in operation should last four hours with the
burner at the highest setting. Provide maximum ventilation
by opening windows or doors to allow odors to dissipate.
Any odors remaining after this initial break-in will be slight
and will disappear with continued use.
This appliance must not be used with glass doors in the
closed position. This can lead to pilot outages and severe
sooting outside the fireplace. Page 6, Figure 2

FLAME APPEARANCE

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