Warranty

3
Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
DANGER: Carbon monoxide poisoning may lead to
death.
Carbon Monoxide Poisoning:
Early signs of carbon monoxide poisoning resemble
the fl u, with headaches, dizziness, or nausea. If you
have these signs, the heater may not be working
properly. Get fresh air at once! Have heater serviced.
Some people are more affected by carbon monoxide
than others. These include pregnant women, persons
with heart or lung disease or anemia, those under the
infl uence of alcohol, and those at high altitudes.
Natural Gas:
Raw natural gas is odorless. An odor making agent is
added to natural gas, which helps you detect a natural
gas leak. However the odor added to natural gas can
fade. So natural gas may be present even though no
odor is detected. Make certain you read and understand
all warnings. Keep this manual for reference. It is your
guide to safe and proper operation of this heater.
Product Features
Figure 1
PRECAUTIONS:
1. 10,000 BTU may be installed in a bedroom, but
not a bathroom, or any place where a strong wind
would shut down the appliance.
2. This heater needs outside ventilation air to run
properly. The Oxygen Depletion Sensor (ODS)
safety shutoff system shuts down the heater if not
enough fresh air is available. See Fresh Air for
Combustion and Ventilation, page 4.
WARNING: An unvented heater having an input
of more than 10,000 Btu/hr (2 931W) shall not be
installed in a bedroom or bathroom.
3. Keep all air openings in heater clear, free of debris
or any blockage. This will insure that enough air for
proper combustion enters the heater.
4. If heater shuts off, do not relight until you provide
fresh, outside air. If heater keeps shutting off, it
requires servicing.
5. Turn off and let cool before servicing. Only a qualifi ed
service person should service and repair heater.
6. Do not run heater:
• Where fl ammable liquids or vapors are used or stored
• During dusty conditions.
7. Before using furniture polish, wax, carpet cleaner or
similar products, turn heater off. If heated the vapors
from these products may create a white powder resi-
due within burner box or on adjacent walls or furniture.
8. Do not use heater if any part has been underwater.
Immediately call a qualifi ed service technician to
inspect the room heater and to replace any part of
the control system and any gas control which has
been underwater.
9. Operating heater above elevations of 4,500 feet
could cause the pilot/ODS to shutdown heater.
10. Always run heater with control knob in a locked
position. Never set control knob between locked
positions. Poor combustion and higher levels of
carbon monoxide may result if control knob is left
between locked positions.
Control Knob
Grill
Front Panel
Burners
Heater
Cabinet
SPECIFICATIONS
MODEL MHVFRD10NG MHVFBF10NG
BTU (Available) 10,000 10,000
Type of Gas Natural Gas Only Natural Gas Only
Ignition Piezo Piezo
Pressure Regulator Setting 4.5 Inches of Water 4.5 Inches of Water
Inlet Gas Pressure (Maximum) 14 Inches of Water
14 Inches of Water
Inlet Gas Pressure (Minimum) 7 Inches of Water
7 Inches of Water
Thermostatic Control No No
Clearances: inches (mm)
Top 36” (915cm) 36” (915cm)
Sides 10” (254cm) 10” (254cm)
Floor (min. to top of carpet) 3” (76cm) 3” (76cm)
Fabric / fl ammable objects 36” (915cm) 36” (915cm) 36” (915cm)
**Operating heater above elevations of 4,500 feet could cause the pilot/ODS to shutdown heater.**