Monessen • Mojo Installation/Owner’s Manual • 4623-900 Rev. D • 04/21
4
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."
A. Appliance Certification
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
,
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.
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.
1
Product Specific and Important Safety Information
B. BTU Specifications
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.
Models
Maximum
Input
BTU/h
Minimum
Input
BTU/h
Orifice
MJ22NIF
(0-2000 FT)
29,000
21,000
#38
MJ22PIF
(0-2000 FT)
28,000
23,000
#52
MJ27NIF
(0-2000 FT)
38,000
27,000
#32
MJ27PIF
(0-2000 FT)
37,000
29,000
1.9 mm
GAS PRESSURES
NOTE:
For LP models an external regulator is required
to reduce supply pressure to a maximum of 13" w.c.
NATURAL
PROPANE (LP)
Inlet Minimum
5.0" w.c.
11.0" w.c.
Inlet Maximum
10.5" w.c.
13.0" w.c.
Gas Valve Manifold
Pressure Setting
3.5" w.c.
10" w.c.
Pilot Regulator
3.5" w.c.
—
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.
PROPANE/LPG:
An external regulator is required to reduce
supply pressure to a maximum of 13" w.c.
State or local codes may allow operation of this appliance
in a vented configuration. Check your local codes.
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.
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.
MODEL:
MJ22NIF/PIF, MJ27NIF/PIF
LABORATORY:
Underwriters Laboratories, Inc. (UL)
TYPE:
Unvented Room Heater
STANDARD:
ANSI Z21.11.2-2016 (Unvented Application)
ANSI Z21.60-2017∙CSA 2.26-2017 (Decorative
Gas Appliances for Installation in Solid-Fuel
Burning Fireplaces)