Product Specific & Important Safety Information; Appliance Certification; Btu Specifications; High Altitude Installations - Monessen Hearth Lyric Series Installation & Owner's Manual

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Product Specific and Important Safety Information
A. Appliance Certification
MODEL: LYR18NV/PV, LYR24NV/PV, LYR30NV/PV
Underwriters Laboratories, Inc. (UL)
LABORATORY:
TYPE: Unvented Room Heater
STANDARD: ANSI Z21.11.2-2016 (Unvented Application)
ANSI Z21.60-2017/CSA2.26-2017 (Vented
Application)
State and local codes may allow operation of this appli-
ance in a vented configuration. Check your local codes.
This product is listed to ANSI standards for "Unvented
Room Heaters" and applicable sections of "Gas Burning
Heating Appliances for Manufactured Homes" and "Gas
Fired Appliances for Use at High Altitude."
NOTICE: This installation must conform with local codes.
In the absence of local codes you must comply with the
National Fuel Gas Code, ANSI Z223.1-latest edition in
the U.S.A.
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.
This appliance is tested and approved as either supplemen-
tal room heater or as a decorative appliance. It should not
be factored as primary heat in residential heating calcula-
tions.
B. BTU Specifications
Models
LYR18NV
LYR18PV
LYR24NV
LYR24PV
LRY30NV
LRY30PV
NOTE: For LP models an external regulator is required
to reduce supply pressure to a maximum of 13" w.c.
GAS PRESSURES
Inlet Minimum
Inlet Maximum
Gas Valve Manifold
Pressure Setting
Pilot Regulator
4
Maximum Minimum
Input Input Orifice
BTU/h BTU/h
28,000 19,000 #38
27,000 22,000 #52
37,000 25,000 1/8"
36,000 28,000 #49
37,000 25,000 1/8"
36,000 28,000 #49
NATURAL PROPANE (LP)
5.0" w.c. 11.0" w.c.
10.5" w.c. 13.0" w.c.
3.5" w.c. 10" w.c.
3.5" w.c. —
Monessen • Lyric Owner's/Installation Manual • 4616-900 Rev. H • 04/21
NATURAL GAS: An external regulator is required to reduce
supply pressure to a maximum of 10
systems operating at higher pressure.
PROPANE/LPG: An external regulator is required to reduce
supply pressure to a maximum of 13" w.c.
Millivolt Ignition Controls
The auto spark allows ignition of the pilot with a simple
press of a button.
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).
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.
Thermal Generator
The millivolt gas log pilot is fitted with a millivolt (thermopile)
generator to provide power for remote activation.
C. High Altitude Installations
NOTICE: If the heating value of the gas has been reduced,
these rules do not apply. Check with your local gas utility
or authorities having jurisdiction.
When installing above 2000 feet elevation: Reduce input
rate 4% for each 1000 feet above 2000 feet.
Check with your local gas utility to determine proper
orifice size.
D. Non-Combustible Materials Specification
Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
slate, glass or plasters, or any combination thereof.
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in
a Vertical Tube Furnace at 750 ºC shall be considered
non-combustible materials.
⁄ " w.c. on natural gas
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