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Vanguard VMH10TN Owner's Operation And Installation Manual

Vent-free natural gas compact classic hearth fireplace
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VENT-FREE NATURAL GAS
COMPACT CLASSIC HEARTH FIREPLACE
OWNER'S OPERATION AND INSTALLATION MANUAL
®
10,000 Btu/Hr with
Thermostat
VMH10TN
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result caus-
ing 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 a bedroom where not prohibited by state or local codes.
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not
prohibited by state or local codes.
*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer. (I.E. Installation of this
product is permitted after the manufactured (mobile) home is sited)
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.
Save this manual for future reference.
®
Shown with Optional
Cabinet Mantel/Hearth
Base Accessory
WARNING: Improper installation,
adjustment, alteration, service, or
maintenance can cause injury or
property damage. Refer to this
manual for correct installation and
operational procedures. For as-
sistance or additional informa-
tion consult a qualified installer,
service agency, or the gas sup-
plier.
WARNING: This is an unvented
gas-fired heater. It uses air (oxy-
gen) from the room in which it is
installed. Provisions for adequate
combustion and ventilation air
must be provided. Refer to Air for
Combustion and Ventilation sec-
tion on page 6 of this manual.

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Summary of Contents for Vanguard VMH10TN

  • Page 1 OWNER’S OPERATION AND INSTALLATION MANUAL ® 10,000 Btu/Hr with Thermostat VMH10TN WARNING: If the information in this manual is not followed exactly, a fire or explosion may result caus- ing 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.

  • Page 2: Table Of Contents

    CONTENTS SAFETY INFORMATION SECTION Safety Information ... 2 Product Identification ... 4 Local Codes ... 4 Product Features ... 4 Unpacking ... 4 Assembly ... 5 Air for Combustion and Ventilation ... 6 Installation ... 10 Connecting to Gas Supply ... 16 Checking Gas Connections ...
  • Page 3 SAFETY INFORMATION Continued 103670 WARNINGS WARNING ICON G 001 WARNING: Any change to this fireplace or its controls can be dangerous. 1. 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. 2.

  • Page 4: Product Identification

    PRODUCT IDENTIFICATION LOCAL CODES PRODUCT FEATURES UNPACKING Fireplace Cabinet Logs Figure 1 - Vent-Free Natural Gas Compact Fireplace Install and use fireplace with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code ANSI Z223, also known as NFPA 54*.

  • Page 5: Assembly

    ASSEMBLY 103670 WARNING ICON G 001 Always have branch support and screen in place before operating fireplace. This prevents excessive temperatures on fireplace surfaces. ASSEMBLING FIREPLACE Tools Required: Phillips screwdriver, 5/16" hex wrench, and slotted screwdriver Installing Log 1. Remove back log, branch, and hood from log box. Discard protective packaging. 2.

  • Page 6: Air For Combustion And Ventilation

    AIR FOR COMBUSTION VENTILATION WARNING ICON This heater shall not be installed in a confined space unless provisions are provided for adequate combustion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home. Today’s homes are built more energy efficient than ever.
  • Page 7 AIR FOR COMBUSTION VENTILATION Continued 103670 DETERMINING FRESH-AIR FLOW FOR FIREPLACE 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 fireplace plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
  • Page 8 AIR FOR COMBUSTION VENTILATION Continued WARNING ICON If the area in which the heater may be operated is smaller than that defined as an unconfined space, provide adequate combus- tion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3 or appli- cable local codes.
  • Page 9 AIR FOR COMBUSTION VENTILATION Continued 103670 Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces.

  • Page 10: Installation

    INSTALLATION NOTICE A qualified service person must install fireplace. Follow all local codes. CHECK GAS TYPE Use only natural gas. If your gas supply is not natural gas, do not install fireplace. Call the dealer where you bought your fireplace for the proper type fireplace. INSTALLATION ITEMS Before installing fireplace, make sure you have the items listed below.
  • Page 11 INSTALLATION Continued 103670 WARNING ICON G 001 If you install the fireplace in a home garage • fireplace pilot and burner must be at least 18 inches above floor. • locate fireplace where moving vehicle will not hit it. For convenience and efficiency, install fireplace •...
  • Page 12 INSTALLING Continued BUILT-IN FIREPLACE INSTALLATION Built-in installation of this fireplace involves installing fireplace into a framed-in enclosure. This makes the front of fireplace flush with wall. An optional brass trim kit accessory is available (see Accessories, page 29). Brass trim will extend past sides of fireplace approximately inch.
  • Page 13 INSTALLING Continued 103670 5. Carefully set fireplace in front of rough opening with back of fireplace inside wall opening. 6. Attach flexible gas line to fireplace gas regulator. See Connecting Fireplace to Gas Supply, page 17. 7. If the optional blower has been installed connect blower to electrical source. Route blower electrical cord through side or rear Options one and two: access door of fireplace.
  • Page 14 INSTALLING Continued OPTIONAL MANTEL INSTALLATION Refer to instructions provided with the mantel for assembly instructions. Refer to Note: instructions below for system installation. Refer to instructions on page 5 for firebox assembly. Blower accessory should be installed if it is being used (see Accessories, page 29). 1.
  • Page 15 INSTALLING Continued 103670 Assembling Brass Trim (Brass trim shipped with mantel) 1. Remove packaging from three remaining pieces of brass trim. 2. Locate two adjusting plates with set screws, and two shims in the hardware packet. 3. Align shim under adjusting plate as shown in Figure 14. 4.

  • Page 16: Connecting To Gas Supply

    CONNECTING TO GAS SUPPLY A qualified service person must connect fireplace to gas supply. Follow all local codes. WARNING ICON Never connect fireplace to private (non-utility) gas wells. This gas is commonly known as wellhead gas. Check gas line pressure before connecting fireplace to gas line. Gas IMPORTANT: line pressure must be no greater than 14 inches of water.

  • Page 17: Checking Gas Connections

    CONNECTING TO GAS SUPPLY Continued 103670 CONNECTING FIREPLACE TO GAS SUPPLY Installation Items Needed • Phillips screwdriver • sealant (resistant to propane gas, not provided) 1. Remove fireplace screen. Remove two screws that hold fireplace screen in place for shipping. These screws are located near top of screen. Discard screws. Lift fireplace screen up and pull out to remove.
  • Page 18 CHECKING CONNECTIONS WARNING ICON G 001 Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once. WARNING ICON G 001 Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints.

  • Page 19: Operating Fireplace

    OPERATING FIREPLACE 103670 FOR YOUR SAFETY READ BEFORE LIGHTING WARNING ICON G 001 If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly.
  • Page 20 OPERATING FIREPLACE Continued 4. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow “B” in the safety information at the top of page 19. If you don’t smell gas, go to the next step. 5.

  • Page 21: Manual Lighting Procedure

    OPERATING FIREPLACE Continued 103670 TO TURN OFF GAS TO APPLIANCE Shutting Off Fireplace 1. Turn control knob clockwise 2. Turn off all electric power to the appliance if service is to be performed. Shutting Off Burner Only (pilot stays lit) 1.

  • Page 22: Inspecting Burner

    INSPECTING BURNER Check pilot flame pattern and burner flame pattern often. PILOT FLAME PATTERN Figure 23 shows a correct pilot flame pattern. Figure 24 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool.
  • Page 23 INSPECTING BURNER Continued 103670 BURNER FLAME PATTERN Figure 25 shows a correct burner flame pattern. Figure 26 shows an incorrect burner flame pattern. The incorrect burner flame pattern shows the flame consistantly higher than one inch above the log. CORRECT FLAME PATTERN AT HIGH POSITION Figure 25 - Correct Burner Flame Pattern INCORRECT FLAME PATTERN...

  • Page 24: Cleaning And Maintenance

    CLEANING MAINTENANCE TROUBLE- SHOOTING All troubleshooting Note: items are listed in order of operation. WARNING ICON G 001 Turn off fireplace and let cool before cleaning. WARNING ICON You must keep control areas, burner, and circulating air passage- ways of fireplace clean. Inspect these areas of fireplace before each use.
  • Page 25 TROUBLE- SHOOTING Continued 103670 OBSERVED POSSIBLE PROBLEM CAUSE When ignitor button 1. Gas supply turned off is pressed, there is or manual shutoff spark at ODS/pilot valve closed but no ignition 2. Control knob not in PILOT position 3. Control knob not pressed in while in PILOT position 4.
  • Page 26 TROUBLE- SHOOTING Continued POSSIBLE OBSERVED PROBLEM CAUSE 1. Burner orifice is Burner does not light after ODS/pilot is lit clogged 2. Burner orifice diameter is too small 3. Inlet gas pressure is too low 1. Manifold pressure is Delayed ignition of too low burner 2.
  • Page 27 TROUBLE- SHOOTING Continued 103670 WARNING ICON G 001 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. •...

  • Page 28: Technical Service

    TECHNICAL SERVICE SPECIFICATIONS SERVICE HINTS REPLACEMENT PARTS You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-323-5190. Input Rate Type Gas Ignition Pressure Regulator Setting Inlet Gas Pressure (in. of water) * Maximum Minimum Dimensions, Inches (H x W x D)

  • Page 29: Accessories

    ACCESSORIES 103670 Purchase these fireplace accessories from your local dealer. If they cannot supply these accessories call DESA International’s Sales Department at 1-800-458-2472 for referral information. You can also write to the address listed on the back page of this manual. MANUAL SHUTOFF THERMOSTATICALLY VALVE - GA5010...

  • Page 30: Illustrated Parts List

    12-1 12-1 12-2 VMH10TN 103670...
  • Page 31 103470-01 101416-32 103670 This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 28 of this manual. Model: VMH10TN DESCRIPTION Outer Casing Top Outer Casing Shoulder Screw Screw, #10 x 3/8"...

  • Page 32: Warranty Information

    WARRANTY INFORMATION 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. We make no other warranty, expressed or implied. VENT-FREE NATURAL GAS COMPACT CLASSIC HEARTH FIREPLACE DESA International warrants this product to be free from defects in materials and components for three (3) years and five (5) years on stainless steel burners from the date of first purchase, provided that the product has been properly...

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