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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 of the fireplace for
vented appliance only.
Height of Restriction
(x)
No Restriction
0" to 3"
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 be met or 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 UNLESS APPROVED BY
MANUFACTURER
Fireplaces with adjustable louvers
should have the louvers fully open
while the unit is in operation.
X
H e i g h t o f r e s t r i c t i v e
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 a Vent Free Log Set in an
Enclosure with Glass Door or Barrier Installed
Minimum Depth of
Fireplace/Firebox
14 in
16 in
16 in
*
T h e l o g s e t
should be placed
against or as
near as possible
to the rear wall
of the fireplace/
firebox.
Doors on a wood burning fireplace
or vent free firebox must be fully
open during operation unless
s p e c i f i e d a n d a p p r o v e d b y
manufacturer.
Depth of
fireplace/firebox.
(Refer to Table).
Monessen • Mojo Installation/Owner's Manual • 4614-900 Rev. C • 01/19
F. Millivolt Ignition Controls
Natural Gas: An external regulator is required to reduce
supply pressure to a maximum of 10-1/2"w.c. on natural
gas systems operating at higher pressure.
The auto spark allows ignition of the pilot without the use
of matches or batteries.
Millivolt control has four (4) positions:
OFF:
All gas to the gas logs is shut off at the valve.
IGN:
Valve position to light/maintain a standing pilot.
ON:
Valve position to turn ON/OFF log set with remote
switch/thermostat.
LOW/HI: Variable position to control flame height (heat
output) through the remote transmitter.
G. 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.
WARNING
Gloves are recommended when handling
logs to prevent skin irritation from loose
materials.
Logs are fragile—handle with
care.
7
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