Pilot/Ods - Monessen Hearth NBST27NV-B Installation & Owner's Manual

Placement in Fireplace with a Restrictive Barrier
The following are guidelines for placing a gas log set in a
fireplace that has a restrictive barrier along the bottom front
opening of the fireplace. Some examples of barriers are
glass/screen door frames and sunken/recessed fireplaces.
Height of Restriction
(x)
No Restriction
0" to 1 ⁄ "
1
2
Greater than 1 ⁄ " to 3"
1
2
Greater than 3"
*Any barrier greater than 3" placed in front of the gas log set is not
recommended by the manufacturer.
NOTE: Non-combustible material such as refractory brick
may be used to line the floor of the fireplace in order to
raise the height of the gas log set in relation to a restrictive
barrier. If the unit is raised, the minimum height dimension
listed in the homeowner's manual must not be exceeded.
NOTE: If the log set is equipped with a remote receiver, a
restrictive barrier may reduce the battery life by increasing
the ambient temperature inside the fireplace. Placement
of the receiver outside of the fireplace will extend the
battery life.
WARNING
Barriers such as the bottom of a glass door frame
placed in front of a gas log set can change the air
flow characteristics of the fireplace which in turn
can cause the unit to overheat and malfunction when
installed as a vented log set.
WARNING
DO NOT INSTALL ANY GLASS OR BARRIERS ON A
VENTLESS FIREBOX
Glass door frames
with adjustable
louvers should have
the louvers fully
open while the unit
is in operation
X
Height of restrictive barrier
caused by glass door frames,
recessed fireplaces, etc. from the
base or bottom surface of the unit.
(Refer to Table)
Figure 2.2 - Reference Drawing of NBST27 Log Set in an
Enclosure
Monessen • NBST27-B Gas Log Set Owner's /Installation Manual • 4615-900 Rev. D • 01/2020
FP2362
Minimum Depth of
Fireplace/Firebox
21 ⁄ ""
1
2
25 ⁄ "
1
4
27 ⁄ "
1
4
*
Refer to
Table
F. Pilot/ODS
The gas log heater is fitted with a specially designed safety
pilot (ODS assembly) which senses the amount of oxygen
available in the room and shuts the gas log heater off if the
oxygen level begins to drop below a satisfactory level. The
pilot can only be relit when adequate fresh air is available.
WARNING
Do not install the heater:
•
Where curtains, furniture, clothing, or
other flammable objects are less than
36" from the front of the heater.
•
In high traffic areas.
•
In windy or drafty areas.
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