
MUA-SVX004B-EN 7
General Safet Information
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• The use or storage of gasoline or other flammable vapors or liquids in open containers in the
vicinity of this appliance is hazardous
• If you smell gas:
–Do not touch electrical switches
–Extinguish any open flames
–Immediately call your gas supplier
• Failure to comply with the general safety information may result in extensive property
damage, severe personal injury or death!
• This product must be installed by a licensed plumber or gas fitter when installed within the
Commonwealth of Massachusetts
• Do not alter the unit heater in any way or damage to the unit and/or severe personal injury or
death may occur!
• Never service any component without first disconnecting all electrical and gas supplies to the
unit or severe personal injury or death may occur!
• Ensure that all power sources conform to the requirements of the unit heater or damage to
the unit will result!
• Installation must be made in accordance with local codes, or in absence of local codes, with
the latest edition of ANSI Standard Z223 1 (NFPA No 54) National Fuel Gas Code All of the
ANSI and NFPA Standards referred to in these installation instructions are those that were
applicable at the time the design of the appliance was certified The ANSI Standards are
available from the American National Standards Institute, Inc , 11 West 42nd Street, New
York, NY, 10036 or www ansi org The NFPA Standards are available from the National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269
• If installed in Canada, the installation must conform with local building codes, or in absence
of local building codes, with current CSA-B149 1 “Installation Codes for Natural Gas Burning
Appliance and Equipment” or CSA-B149 2 “Installation Codes for Propane Gas Burning
Appliances and Equipment” These outdoor duct furnaces have been designed for and
certified to comply with CSA 2 6
• These units have been designed and certified for outdoor use only, and may be located on
the roof of the building or at any convenient location external of the building to be heated
The input range is 100,000 BTU/HR (29 3 kW) to 400,000 BTU/HR (117 1 kW) in 50,000 BTU/
HR (14 6 kW) increments
• Service Access Panel Removal: To remove an access panel door, use the following
procedure: remove the two screws and two washers from the louvered flue discharge area of
the service panel (power vent doors only) Each panel is held in place with two “Grip”
Latches Using a slotted head screw driver, turn the latch screwhead counter clockwise Using
the handle provided, pull the panel upwards Pull the bottom of the panel out and lower the
panel to disengage it from the top lip To replace an access door panel, guide the panel door