Millivolt Ignition Controls; Pilot/Ods - Monessen Hearth Lyric Series Installation & Owner's Manual

Placement in Fireplace with a Restrictive Barrier
The following are guidelines for placing a Lyric burner 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 3"
*Any barrier greater than 3" placed in front of the Lyric is not recom-
mended 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 burner 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 burner 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 appliance 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 burner.
WARNING
DO NOT INSTALL ANY GLASS OR BARRIERS ON
A VENTLESS FIREBOX UNLESS APPROVED FOR
THAT APPLIANCE AS PER THE LISTING.
Height of restrictive barrier caused by glass
door frames, recessed fireplaces, etc. from
the base or bottom surface of the unit.
(Refer to table)
Glass door frames with adjustable louvers
should have the louvers fully open while
the unit is in operation
Figure 2.2 - Reference Drawing of a Lyric in an Enclosure
with Glass Door or Barrier Installed
Minimum Depth of
Fireplace/Firebox
11"
16"
*
The burner should be placed against
or as near as possible to the rear
wall of the fireplace/firebox.
Depth of fire-
place/firebox
(Refer to table)
Monessen • Lyric Owner's/Installation Manual • 4616-900 Rev. H • 04/21
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 ignitor allows ignition of the pilot without
the use of matches or batteries.
Milivoit control has four (4) positions:
OFF: All gas to the burner is shut off at the valve.
IGN:
Valve position to light/maintain a standing pilot.
ON: Valve position to turn ON/OFF burner with remote
switch/thermostat.
LOW/HI: Variable position to control flame height (heat
output).
G. Pilot/ODS
The gas 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.
Gloves are recommended when handling glass
media. Pieces are sharp and jagged and may
cause small cuts or splinters to hands. Always
make sure glass is cool before handling
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