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VENT-FREE NATURAL GAS
MINI-HEARTH
OWNER'S OPERATION AND INSTALLATION MANUAL
VMH3000TNA
15,000 to 30,000 Btu/Hr
with Thermostat
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, manufactured
(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
Shown with Optional
Mantel Which Features
a Built-In Base
WARNING: Improper installa-
tion, 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 installed. Provisions
for adequate combustion and
ventilation air must be pro-
vided. Refer to Air For Com-
bustion and Ventilation sec-
tion on page 5 of this manual.
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Table of Contents
Related Manuals for Vanguard VMH3000TNA
Summary of Contents for Vanguard VMH3000TNA
- Page 1 VENT-FREE NATURAL GAS MINI-HEARTH OWNER’S OPERATION AND INSTALLATION MANUAL VMH3000TNA 15,000 to 30,000 Btu/Hr with Thermostat 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.
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Page 2: Safety Information
NATURAL GAS RESIDENTIAL HEATERS SAFETY INFORMATION WARNINGS IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, oper- ate, or service this heater. Im- proper use of this heater can cause serious injury or death from burns, fire, explosion, electrical shock, and carbon monoxide poisoning. -
Page 3: Product Identification
PRODUCT IDENTIFICATION Ignitor Button Heater Cabinet Figure 1 - Vent-Free Gas Log Propane/LP Gas Space Heater PRODUCT FEATURES SAFETY DEVICE This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for vent-free room heaters. - Page 4 NATURAL GAS RESIDENTIAL HEATERS ASSEMBLY Continued Front Panel Sheet Metal Screw Truss- Head Screw Brass Front Trim Screw Figure 3 - Assembling Heater WARNING: Always have burner shield and screen in place before operating heater. This pre- vents excessive temperatures on heater surfaces.
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Page 5: Air For Combustion And Ventilation
AIR FOR COMBUSTION AND VENTILATION WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ven- tilation air. Read the following in- structions to insure proper fresh air for this and other fuel-burning appliances in your home. -
Page 6: Determining Fresh-Air Flow For Heater Location
NATURAL GAS RESIDENTIAL HEATERS 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 7: Ventilation Air
AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must pro- vide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 7). -
Page 8: Check Gas Type
NATURAL GAS RESIDENTIAL HEATERS INSTALLATION NOTICE: This heater is intended for use as supplemental heat. Use this heater along with your pri- mary heating system. Do not in- stall this heater as your primary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. -
Page 9: Installation Options
INSTALLATION Continued THERMOSTAT SENSING BULB The thermostat sensing bulb has been placed inside the heater for protection during shipping. Locating Thermostat Sensing Bulb 1. Remove front panel of heater (see Fig- ure 2, page 3). 2. Locate thermostat sensing bulb just under burner assembly. - Page 10 NATURAL GAS RESIDENTIAL HEATERS INSTALLATION Continued Attaching To Wall Anchor Method For attaching mounting bracket to hollow walls (wall areas between studs) or solid walls (concrete or masonry). Drill holes at marked locations using 5/16" drill bit. For solid walls (concrete or masonry), drill at least 1"...
- Page 11 INSTALLATION Continued B. MOUNTING HEATER ON OPTIONAL HEARTH BASE Tools needed: • #2 Phillips screwdriver • slotted screwdriver • electric drill (if securing base to floor) The optional hearth base kit includes the following: • Hearth Base • 4 Wood Screws •...
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Page 12: Connecting To Gas Supply
NATURAL GAS RESIDENTIAL HEATERS INSTALLATION Continued C. MOUNTING HEATER TO OPTIONAL MANTEL See Instructions Included With Mantel Kit. Assembling Mantel IMPORTANT: Only use the optional man- tels specified in this manual. See Accesso- ries, page 23 for proper mantel kits. This heater is only approved for use with models GMF800/GMU801 series, GM900F/ GM901U series, GM902F/GM903U series,... -
Page 13: Checking Gas Connections
INSTALLATION Continued CHECKING GAS CONNECTIONS WARNING: Test all gas pip- ing and connections for leaks after installing or servicing. Cor- rect all leaks at once. WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. -
Page 14: Operating Heater
NATURAL GAS RESIDENTIAL HEATERS OPERATING HEATER FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not fol- low these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. -
Page 15: Inspecting Burner
OPERATING HEATER Continued THERMOSTAT CONTROL OPERATION The thermostatic control used on this heater differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this heater senses the room temperature. The thermostat adjusts the amount of gas flow to the burner. -
Page 16: Troubleshooting
NATURAL GAS RESIDENTIAL HEATERS TROUBLESHOOTING Note: For additional help, visit DESA International’s technical service web site at www.desatech.com. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM When ignitor button is pressed, there is no spark at ODS/pilot... - Page 17 TROUBLESHOOTING Continued OBSERVED PROBLEM Burner does not light after ODS/pilot is lit Delayed ignition of burner Burner backfiring during combustion Yellow flame during burner combustion Slight smoke or odor during initial operation Heater produces a whistling noise when burner is lit White powder residue forming within burner box or on adjacent walls or furniture 107097...
- Page 18 NATURAL GAS RESIDENTIAL HEATERS 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 19: Cleaning And Maintenance
If they can’t supply original replacement part(s), call DESA International’s Techni- cal Service Department at 1-800-323-5190 for referral information. When calling DESA International, have ready • your name • your address • model and serial numbers of your heater • how heater was malfunctioning •... -
Page 20: Illustrated Parts Breakdown
® NATURAL GAS RESIDENTIAL HEATERS ILLUSTRATED PARTS BREAKDOWN VMH3000TNA For more information, visit www.desatech.com 107097... -
Page 21: Parts List
PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 19 of this manual. VMH3000TNA 107097 VMH3000TNA PART NO. DESCRIPTION 098304-01 Screw, #10 x 3/8" 100566-01CK Front Panel... -
Page 22: Specifications
23.75 x 25.9 x 8.5 25.8 x 28.7 x 10.1 TECHNICAL SERVICE You may have further questions about in- stallation, operation, or Trouble Shooting. If so, contact DESA International’s Techni- cal Service Department at 1-800-323-5190. You can also visit DESA International’s technical service site www.desatech.com. - Page 23 ACCESSORIES Purchase these heater accessories from your local dealer. If they can not supply these accessories call DESA International’s Sales Department at 1-800-458-2472 for infor- mation. You can also write to the address listed on the back page of this manual.
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Page 24: Warranty Information
VENT-FREE NATURAL GAS LOG HEATERS DESA International warrants this product to be free from defects in materials and components for four (4) years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.