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®
VENT-FREE NATURAL GAS
®
COMPACT CLASSIC HEARTH FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
VMH10TNA
10,000 Btu/Hr with
Thermostat
Shown with Optional
Cabinet Mantel/Hearth
Base Accessory
WARNING: Improper instal-
WARNING: If the information in this manual
lation, adjustment, alteration,
is not followed exactly, a fire or explosion
service, or maintenance can
may result causing property damage, per-
cause injury or property dam-
sonal injury, or loss of life.
age. Refer to this manual f
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE 1. This appliance is only for use with the 11. Before using furniture polish, wax, car- SAFETY pet cleaner, or similar products, turn type of gas indicated on the rating plate. INFORMATION This appliance is not convertible for use heater off. If heated, the vapors from with other gases. these products may create a white pow- der residue within burner box or on ad- 2. If you smell gas WARNINGS WARNING ICON G 001 jacent walls or furniture. • shut
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OWNER’S MANUAL PRODUCT PRODUCT IDENTIFICATION FEATURES SAFETY PILOT Fireplace Cabinet This fireplace has a pilot with an Oxygen Depletion Sensor Shutoff System (ODS). The ODS/pilot is a required feature for vent- free room fireplaces. The ODS/pilot shuts off the fireplace if there is not enough fresh air. Screen PIEZO IGNITION SYSTEM This fireplace has a piezo ignitor. This sys- tem requires no matches, batteries, or other sources to light fireplace. THERMOSTATIC HEAT Logs CONTROL This fireplace
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE Screen ASSEMBLY Shipping Back Log Screw Shoulder WARNING: Always have Screw branch support and screen in place before operating fireplace. This prevents excessive tempera- tures on fireplace surfaces. Burner ASSEMBLING FIREPLACE Support Tools Required: • Phillips screwdriver Screw • 5/16" hex wrench • slotted screwdriver Installing Log 1. Remove back log, branch, and hood from log box. Discard protective packaging. 2. Remove two shipping screws
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OWNER’S MANUAL Confined and Unconfined Space PROVIDING ADEQUATE AIR FOR VENTILATION The National Fuel Gas Code (ANS Z223.1, COMBUSTION AND 1992 Section 5.3) defines a confined space The following are excerpts from National VENTILATION as a space whose volume is less than 50 Fuel Gas Code. NFPA 54/ANS Z223.1, Sec- 3 cubic feet per 1,000 Btu per hour (4.8 m per tion 5.3, Air for Combustion and Ventilation. kw) of the aggregate input rating of all WARNING: This heater shall All spaces in homes fal
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE AIR FOR COMBUSTION AND VENTILATION Continued 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. 1. Determine the volume of the space (length x width x height). Length
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OWNER’S MANUAL AIR FOR COMBUSTION AND 12" VENTILATION Continued VENTILATION AIR Ventilation Grills Into Adjoining Room, Ventilation Option 2 Ventilation Air From Inside Grills Or into Adjoining Remove Building Room, Door into Option 1 Adjoining This fresh air would come from an adjoining Room, Option 3 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 conn
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE manual shutoff valve from your dealer. See INSTALLATION Accessories, page 27. CAUTION: This heater creates warm air currents. These currents NOTICE: This heater is intended Note: If desired, purchase a four-sided brass move heat to wall surfaces next to for use as supplemental heat. Use trim kit for built-in installations. See Acces- heater. Installing heater next to this heater along with your pri- sories, page 27. vinyl or cloth wall coverings
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OWNER’S MANUAL 5. Carefully set fireplace in front of rough INSTALLATION opening with back of fireplace inside Continued wall opening. CEILING 6. Attach flexible gas line to fireplace gas 10 1/2" regulator. See Connecting Fireplace to 26 7/8" Gas Supply, page 15. 36" Minimum 7. If the optional blower has been installed Top Of 3/4" Off connect blower to electrical source. Mantel Can The Floor Be Flush Options one and two: Route blower With Wall 26 7/8" Minimum electrical cord through side or rear
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE 8. Place assembly next to wall at installa- OPTIONAL MANTEL INSTALLATION tion location. INSTALLATION Continued 9. Remove brass trim kit and mantel. Be Note: Refer to instructions provided with careful not to damage wall or mantel. Mantel Clearances for Built-In the mantel for assembly instructions. Refer 3 10. Attach wood base to floor with two 1 /4" Installation to instructions below for system installa- black screws provided (see Figure 13).
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OWNER’S MANUAL Branch INSTALLING BLOWER INSTALLATION Support Shoulder ACCESSORY GA3400T Continued Screw Removing Upper Louver Assembling Brass Trim (Brass Remove Assembly trim shipped with mantel) Screw 1. Remove packaging from three remain- To install the blower accessory, you must ing pieces of brass trim. first remove the upper louver assembly. Valve 2. Locate two adjusting plates with set 1. Lift screen off heater. Cover screws, and two shims in the hardware Shield 2. Remove 4 screws from lo
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3 2 1 ® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE 6. Route the wire harness through the 9. Install the switch plate on the valve INSTALLATION hole in left side of baffle. Pull wire cover shield with 2 #10 screws provided Continued harness through lower opening above (see Figure 18). Reinstall the valve where the valve shield was removed. cover shield. Route power cord out of 4. Carefully disconnect green and white (see Figure 17). the cabinet by inserting it through the wires at their ins
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3 2 1 OWNER’S MANUAL Follow instructions Removing Valve Cover 3. Remove black plastic strain relief and INSTALLATION Shield (page 11), then power cord from switch plate. The Continued power cord supplied will not be used in 1. Install a snap bushing found in hard- built-in installations. Pop in the plastic For Built-In Installation ware kit into one of the holes found on snap bushing found in hardware kit into rear of valve cover shield. The other the hole left by supply cord/strain relief. hole
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE Apply pipe joint sealant lightly to male INSTALLATION CAUTION:Use only new, threads. This will prevent excess sealant Continued black iron or steel pipe. Inter- from going into pipe. Excess sealant in pipe nally-tinned copper tubing may could result in clogged fireplace valves. Attaching Wood Base to Solid be used in certain areas. Check Floor your local codes. Use pipe of CAUTION: Use pipe joint seal- 1/2" or greater diameter to al- For atta
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OWNER’S MANUAL Screen INSTALLATION Shipping Continued Screw Branch CONNECTING FIREPLACE Support TO GAS SUPPLY Installation Items Needed Shoulder Screw • Phillips screwdriver • sealant (resistant to propane/LP gas, not provided) Flexible Gas 1. Remove fireplace screen. Remove two Line 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. 2. Remove screws that attach branch sup- port to
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE Test Pressures Equal To or Less Than Pressure Testing Fireplace Gas INSTALLATION 1/2 PSIG Connections Continued 1. Close manual shutoff valve (see Fig- 1. Open manual shutoff valve (see Figure ure 25). CHECKING GAS 25). 2. Pressurize supply piping system by ei- CONNECTIONS 2. Open main gas valve located on or near ther using compressed air or opening gas meter. main gas valve located on or near gas WARNING: Test all gas pip- 3. Make sure contro
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OWNER’S MANUAL Note: You may be running this fire- LIGHTING OPERATING place for the first time after hooking INSTRUCTIONS FIREPLACE up to gas supply. If so, the control knob may need to be pressed in for WARNING: You must operate FOR YOUR SAFETY 30 seconds. This will allow air to this fireplace with the fireplace bleed from the gas system. READ BEFORE screen in place. Make sure fire- • If control knob does not pop up LIGHTING place screen is installed before when released, contact a qualified r
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE MANUAL LIGHTING OPERATING PROCEDURE FIREPLACE 1. Follow steps 1 through 5 under Light- Continued ing Instructions, page 17. 2. With control knob pressed in, strike TO TURN OFF GAS match. Hold match to pilot until pi- TO APPLIANCE lot lights. Shutting Off Fireplace 3. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 1. Turn control knob clockwise seconds, release control knob. Now to the OFF position. follow step 8, pa
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OWNER’S MANUAL BURNER FLAME PATTERN INSPECTING Figure 32 shows a correct burner flame BURNER pattern. Figure 33 shows an incorrect burner flame pattern. The incorrect burner flame Check pilot flame pattern and burner flame pattern shows the flame consistently higher pattern often. than one inch above the log. PILOT FLAME PATTERN If burner flame pattern is incorrect, as shown in Figure 33 Figure 30 shows a correct pilot flame pattern. • turn fireplace off (see To Turn Off Gas to Figure 31 shows a
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® VMH10TNA VENT-FREE NATURAL GAS COMPACT FIREPLACE TROUBLESHOOTING WARNING: Turn off and un- CAUTION: Never use a wire, plug fireplace and let cool before needle, or similar object to clean Note: For additional help, visit DESA servicing. Only a qualified ser- ODS/pilot. This can damage ODS/ International’s technical service web site vice person should service and pilot unit. at www.desatech.com. repair fireplace. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLE
