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OWNER’S OPERATION AND INSTALLATION MANUAL

VENT-FREE NATURAL GAS

COMPACT CLASSIC HEARTH

 FIREPLACE

®

Shown with Optional
Cabinet Mantel/Hearth
Base Accessory

®

10,000 Btu/Hr with

Thermostat

VMH10TN

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.

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.

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.

Summary of Contents for VMH10TN

Page 1: ...al 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 applianc...

Page 2: ...ire explosion electrical shock and carbon monoxide poisoning WARNING ICON G 001 DANGER Carbon monoxide poisoning may lead to death SAFETY INFORMATION Carbon Monoxide Poisoning Early signs of carbon mo...

Page 3: ...ufacturing residues 9 Do not allow fans to blow directly into the fireplace Avoid any drafts that alter burner flame patterns Ceiling fans can create drafts that alter burner flame patterns Altered bu...

Page 4: ...t 4 Check fireplace for any shipping damage If fireplace is damaged promptly inform dealer where you bought fireplace PRODUCT FEATURES Safety Pilot This fireplace has a pilot with an Oxygen Depletion...

Page 5: ...Place branch on branch support see Figure 2 6 Reattach screen by placing the notches in the screen frame over the shoulder screws and pushing down Figure 2 Assembling Fireplace WARNING ICON G 001 WARN...

Page 6: ...n The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation However in buildings of unusually tight construction you must provide additional fresh air Unu...

Page 7: ...__________________ Btu Hr Vented gas heater ___________________ Btu Hr Gas fireplace logs ___________________ Btu Hr Other gas appliances ___________________ Btu Hr Total ___________________ Btu Hr Ex...

Page 8: ...ing to an adjoining unconfined space you must provide 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 Figur...

Page 9: ...thin 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 IMPORTANT Do not provide...

Page 10: ...ass trim kit for built in installations See Accessories page 29 IMPORTANT If you install the fireplace in a bedroom some building codes require that the fireplace mantel system be secured to or within...

Page 11: ...er for power source 6 Minimum From Sides Of Fireplace Left Side CEILING 36 Minimum FLOOR Right Side Top Of Mantel Can Be Flush With Wall Left Side CEILING Right Side 36 Minimum Figure 6 Mounting Clear...

Page 12: ...ping 4 If you have not assembled firebox follow instructions on page 5 If installing in a corner use dimensions shown in Figure 9 for the rough opening The height is 26 1 8 which is the same as the wa...

Page 13: ...in nailing flange 10 Check all gas connections for leaks See Checking Gas Connections page 17 11 If using optional brass trim kit install the trim after final finishing and or painting of wall See in...

Page 14: ...gure 12 Figure 13 Attaching Wood Base to Floor 1 3 4 Screw Wood Base Hole for 3 wood screw for attaching fireplace to wooden base Hole for 3 wood screw for attaching fireplace to mantel 8 Place assemb...

Page 15: ...ass 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 und...

Page 16: ...trapped matter is not likely to freeze A sediment trap traps moisture and contaminants This keeps them from going into fireplace controls If sediment trap is not installed or is installed wrong firepl...

Page 17: ...ace Gas Regulator 4 Apply pipe joint sealant lightly to male threads of gas connector attached to flexible gas line see Figure 18 Connect flexible gas line to flexible gas line attached to gas regulat...

Page 18: ...d soap and water to gas joints Bubbles forming show a leak 4 Correct all leaks at once PRESSURE TESTING FIREPLACE GAS CONNECTIONS 1 Open manual shutoff valve see Figure 19 2 Open main gas valve locate...

Page 19: ...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 C Use only...

Page 20: ...ilot The pilot is attached to the front of burner If needed keep pressing ignitor button until pilot lights Note If pilot does not stay lit refer to Troubleshooting pages 24 through 27 Also contact a...

Page 21: ...re drops below the set tem perature The control knob can be set to any heat level between HI and LO Note The thermostat sensing bulb measures the temperature of air near the fireplace cabinet This may...

Page 22: ...LAME 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...

Page 23: ...r flame pattern is incorrect as shown in Figure 26 turn fireplace off see To Turn Off Gas to Appliance page 21 see Troubleshooting pages 24 through 27 Figure 25 Correct Burner Flame Pattern Figure 26...

Page 24: ...d service person Fireplace may need more frequent cleaning due to excessive lint from carpeting bedding material etc POSSIBLE CAUSE 1 Ignitor cable pinched or wet 2 Ignitor electrode not con nected to...

Page 25: ...ilot assembly 7 Replace thermocouple 8 Replace control valve OBSERVED PROBLEM When ignitor button is pressed there is spark at ODS pilot but no ignition ODS pilot lights but flame goes out when contro...

Page 26: ...Contact local natural gas company 4 Replace gas regulator 1 Problem will stop after a few hours of operation 1 Operate burner until air is removed from line Have gas line checked by local natural gas...

Page 27: ...t at top of page 2 Control valve defective 1 Foreign matter be tween control valve and burner 2 Gas leak See Warn ing statement at top of page 1 Not enough combus tion ventilation air OBSERVED PROBLEM...

Page 28: ...rnational s Technical Service Department at 1 800 323 5190 for referral information When calling DESA International have ready your name your address model number of your fireplace how fireplace was m...

Page 29: ...included Three sided brass trim kit included CORNER MANTEL WITH BUILT IN HEARTH BASE Unfinished GM721U Finished GM720F For use with fireplace Space saving mantel and hearth base corner design features...

Page 30: ...30 103670 12 1 12 2 23 29 32 36 37 13 7 33 11 8 10 8 7 30 3 1 2 9 17 19 6 22 31 21 40 27 38 38 16 15 18 24 28 5 34 26 25 20 42 35 12 24 12 1 25 14 4 39 41 VMH10TN...

Page 31: ...3671 01 Outlet Tube 1 17 100587 01 Brass Screw 6 x 3 8 4 18 098303 02 Regulator Screw 2 19 102634 01CJ Outer Shell Base 1 20 102649 01CJ Branch Support 1 21 099415 10 Gas Regulator 1 22 102875 01 Regu...

Page 32: ...caused by improper installation Travel diagnostic cost labor transportation and any and all such other costs related to repairing a defective fireplace will be the responsibility of the owner TO THE F...

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