Place The Decorative Rock; Flame Appearance; Operating Instructions - Monessen Hearth NBST27NV-B Installation & Owner's Manual

B. Place Decorative Rock
The volcanic rocks are shipped with your log set. The vol-
canic rocks may be placed around the unit on the floor of
the firebox. Be sure to avoid any areas on the burner itself
DO NOT sprinkle volcanic rocks on the logs,
around the pilot, nor near the burners. This
may cause sooting. Place volcanic rocks
only on the floor of the fireplace.
During initial operation of the new heater,
new burning logs and/or rock wool will give
off a paper burning smell and orange flames
will be present. Simply open the windows
for a few hours to vent the odor.
C. Flame Appearance
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 (refer to lighting instructions)
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 5.11 for correct pilot flame.
If the pilot flame does not touch the thermocouple, then
the main burner cannot function reliably. Figure 5.12 for
incorrect shape of pilot flame.
Thermocouple
for Natural
Thermocouple
for LP
Figure 5.10 - Correct Appearance of Pilot Flame
Thermocouple
for Natural
Thermocouple
for LP
Figure 5.11 - Incorrect Appearance of Pilot Flame
Monessen • NBST27-B Gas Log Set Owner's /Installation Manual • 4615-900 Rev. D • 01/2020
FP2272
pilot correct 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 5.12. 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-
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.
Figure 5.12 - Correct Appearance of Rear Flames
D. 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 harm-
ful, 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.
LG661
NBST log flames
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