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INFRARED VENT-FREE NATURAL GAS
OWNER'S OPERATION AND INSTALLATION MANUAL
MR10NT
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result
causing property damage, personal injury, or loss
of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the
fire department.
— Installation and service must be performed by
a qualified installer, service agency, or the gas
supplier.
This appliance may be installed in an aftermarket*, permanently located, manufac-
tured (mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This
appliance is not convertible for use with other gases.
*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
Save this manual for future reference.
HEATER
™
WARNING: Improper instal-
lation, adjustment, alteration,
service, or maintenance can
cause injury or property dam-
age. Refer to this manual for
correct installation and op-
erational procedures. For as-
sistance or additional infor-
mation consult a qualified in-
staller, service agency, or the
gas supplier.
WARNING: This is an
unvented gas-fired heater.
It uses air (oxygen) from
the room in which it is in-
stalled. Provisions for ad-
equate combustion and
ventilation air must be pro-
vided. Refer to Air For Com-
bustion and Ventilation on
page 4 of this manual.
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Table of Contents
Related Manuals for Desa Medallion MR10NT
Summary of Contents for Desa Medallion MR10NT
- Page 1 ™ INFRARED VENT-FREE NATURAL GAS HEATER OWNER’S OPERATION AND INSTALLATION MANUAL MR10NT WARNING: Improper instal- WARNING: If the information in this manual is not lation, adjustment, alteration, followed exactly, a fire or explosion may result service, or maintenance can causing property damage, personal injury, or loss cause injury or property dam- of life.
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Page 2: Safety Information
™ MR10NT VENT-FREE NATURAL GAS HEATER SAFETY 5. This heater needs fresh, outside air ven- Due to high temperatures, the tilation to run properly. This heater has appliance should be located out INFORMATION an Oxygen Depletion Sensing (ODS) of traffic and away from furniture safety shutoff system. -
Page 3: Product Identification
OWNER’S MANUAL PRODUCT LOCAL CODES IDENTIFICATION Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of National Fuel Gas Code, Piezo Ignitor Button ANS Z223.1, also known as NFPA 54*. Control Knob *Available from: American National Standards Institute, Inc. -
Page 4: Air For Combustion And Ventilation
™ MR10NT VENT-FREE NATURAL GAS HEATER AIR FOR PROVIDING ADEQUATE Confined and Unconfined Space VENTILATION COMBUSTION AND The National Fuel Gas Code, ANS Z223.1 defines a confined space as a space whose The following are excerpts from National VENTILATION volume is less than 50 cubic feet per 1,000 Fuel Gas Code, NFPA 54/ANS Z223.1, Sec- Btu per hour (4.8 m3 per kw) of the aggre- tion 5.3, Air for Combustion and Ventilation. -
Page 5: Determining Fresh Air Flow For Heater Location
OWNER’S MANUAL AIR FOR COMBUSTION AND VENTILATION Continued DETERMINING FRESH AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Space Use this worksheet to determine if you have a confined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms. - Page 6 ™ MR10NT VENT-FREE NATURAL GAS HEATER AIR FOR COMBUSTION AND VENTILATION 12" Continued VENTILATION AIR Ventilation Air From Inside Ventilation Grills Building Into Adjoining Room, Ventilation This fresh air would come from an adjoin- Option 2 Grills ing unconfined space. When ventilating to into Adjoining Remove an adjoining unconfined space, you must...
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Page 7: Check Gas Type
OWNER’S MANUAL INSTALLATION LOCATING HEATER CEILING This heater is designed to be mounted on NOTICE: This heater is intended a wall. 36" for use as supplemental heat. Use Minimum 8" this heater along with your pri- WARNING: Maintain the mini- Minimum mary heating system. - Page 8 ™ MR10NT VENT-FREE NATURAL GAS HEATER INSTALLATION Thin or Installing Bottom Mounting Thick Wall Screw Continued (thick wall 1. Locate bottom mounting hole. This shown) Installing Two Mounting Screws 1/16" hole is near bottom on back panel of Space heater (see Figure 11). Note: Wall anchors and mounting screws are in hardware package.
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Page 9: Connecting To Gas Supply
OWNER’S MANUAL INSTALLATION CAUTION: Use pipe joint seal- Continued ant that is resistant to liquid pe- troleum (LP) gas. CONNECTING TO GAS SUPPLY Install sediment trap in supply line as shown in Figure 12. Locate sediment trap where it is within reach for cleaning. Locate sedi- WARNING: This appliance re- ment trap where trapped matter is not likely quires a 3/8"... -
Page 10: Checking Gas Connections
™ MR10NT VENT-FREE NATURAL GAS HEATER INSTALLATION OPERATING 3. Check all joints from gas meter to equipment shutoff valve (see Figure Continued HEATER 14). Apply mixture of liquid soap and water to gas joints. Bubbles forming CHECKING GAS FOR YOUR SAFETY show a leak. - Page 11 OWNER’S MANUAL OPERATING THERMOSTAT Keep control knob pressed in for 30 seconds after lighting pilot. After 30 CONTROL HEATER seconds, release control knob. OPERATION • If control knob does not pop up Continued when released, contact a qualified The control knob can be set to any heat service person or gas supplier for LIGHTING level between HI and LO.
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Page 12: Inspecting Burner
™ MR10NT VENT-FREE NATURAL GAS HEATER INSPECTING If burner flame pattern is incorrect, as shown ware store, or home center may carry com- in Figure 20 pressed air in a can. You can use a vacuum BURNER cleaner in the blow position. If using com- •... -
Page 13: Troubleshooting
OWNER’S MANUAL TROUBLESHOOTING CAUTION: Never use a wire, WARNING: Turn off heater and let cool before servicing. Only needle, or similar object to clean Note: All troubleshooting items are listed a qualified service person should ODS/pilot. This can damage ODS/ in order of operation. - Page 14 ™ MR10NT VENT-FREE NATURAL GAS HEATER TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner plaques do not light after ODS/pilot 1. Burner orifice(s) is clogged 1. Clean burner orifice(s) (see Cleaning is lit and Maintenance, page 12) or replace burner orifice(s) 2.
- Page 15 OWNER’S MANUAL TROUBLESHOOTING Continued WARNING: If you smell gas • Shut off gas supply. • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
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Page 16: Illustrated Parts List
™ MR10NT VENT-FREE NATURAL GAS HEATER ILLUSTRATED PARTS LIST MR10NT ODS/PILOT 105935... -
Page 17: Parts List
OWNER’S MANUAL PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 18 of this manual. MR10NT PART NUMBER DESCRIPTION QTY. 098304-01 Screw, #10 x 3/8" 099467-06 Front Panel Assy., Ivory 099318-04 Grill Guard... -
Page 18: Specifications
™ MR10NT VENT-FREE NATURAL GAS HEATER SPECIFICATIONS REPLACEMENT PARTS MR10NT 10,000 Note: Use only original replacement parts. This will protect your warranty coverage for Type Gas Natural Only parts replaced under warranty. Ignition Piezo PARTS UNDER WARRANTY Pressure Regulator Setting 3.5"... - Page 19 OWNER’S MANUAL NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ 105935...
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Page 20: Warranty Information
WARRANTY INFORMATION KEEP THIS WARRANTY Model Serial No. Date Purchased Always specify model and serial numbers when communicating with the factory. We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written warranty.
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