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Product Specific and Important Safety Information
A. Appliance Certification
MODEL: MJ22NV/PV, MJ27NV/PV
Laboratory: Underwriters Laboratories, Inc. (UL)
TYPE: Unvented Room Heater
STANDARD: ANSI Z21.11.2-2016 (Unvented Application)
ANSI Z21.60-2017/CSA2.26-2017 (Vented
Application)
State or local codes may allow operation of this appliance
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
Maximum
Models
MJ22NV
(0-4500 FT)
MJ22PV
(0-4500 FT)
MJ27NV
(0-4500 FT)
MJ27PV
(0-4500 FT)
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
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.
4
Minimum
Input
Input
Orifice
BTU/h
BTU/h
29,000
21,000
#38
28,000
23,000
#52
38,000
27,000
#31
37,000
29,000
1.9mm
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.
—
⁄
" w.c. on natural gas
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Monessen • Mojo Installation/Owner's Manual • 4614-900 Rev. C • 01/19
Millivolt Ignition Controls
The auto spark allows ignition of the pilot without the use
of matches.
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.
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.
WARNING: This product and the
fuels used to operate this product (liquid
propane or natural gas), and the products
of combustion of such fuels, can expose
you to chemicals including benzene, which
is known to the State of California to cause
cancer and reproductive harm. For more
information go to: www.P65Warnings.
ca.gov.
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 4500 feet elevation: Reduce input
rate 4% for each 1000 feet above 4500 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,
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