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Desa VMH26TNA - page 1
Save this manual for future reference. OWNER’S OPERA TION AND INST ALLA TION MANUAL VENT -FREE NA TURAL GAS COMP ACT CLASSIC HEAR TH ® FIREPLACE ® Shown with Optional Cabinet Mantel/Hearth Base Accessory 14,000 to 26,000 Btu/Hr with Thermostat VMH26TNA WARNING: If the information in this manual is not followed exactly, a fire or explosion may r ...
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Desa VMH26TNA - page 2
2 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® DANGER: Carbon monoxide poisoning may lead to death! SAFETY INFORMA TION Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning re- semble the flu, with headaches, dizziness, or nausea. If you have these signs, the fire- place may not be working properly. Get fresh air at once! Ha ...
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Desa VMH26TNA - page 3
3 104060 OWNER’S MANUAL PRODUCT IDENTIFICA TION LOCAL CODES 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 ANS Z223.1 , also known as NFPA 54*. *Available from: American National Standards Institute, Inc. 1430 Broadway New York, NY 10018 National Fir ...
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Desa VMH26TNA - page 4
4 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® WARNING: Always have branch support and screen in place before operating fireplace. This prevents excessive tempera- tures on fireplace surfaces. ASSEMBL Y WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this fire ...
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Desa VMH26TNA - page 5
5 104060 OWNER’S MANUAL AIR FOR COMBUSTION AND VENTILA TION Today’s homes are built more energy effi- cient than ever. New materials, increased insulation, and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, ...
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Desa VMH26TNA - page 6
6 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® AIR FOR COMBUSTION AND VENTILA TION Continued WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in t ...
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Desa VMH26TNA - page 7
7 104060 OWNER’S MANUAL AIR FOR COMBUSTION AND VENTILA TION Continued Figure 5 - Ventilation Air from Outdoors Shown with Optional Mantel Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts. You must provide two per- manent openings: one within 12" of the ceiling and one within 12" of the floor. Co ...
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Desa VMH26TNA - page 8
8 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® WARNING: A qualified ser- vice person must install fireplace. Follow all local codes. You can recess firebox into the wall. You can also position fireplace in the optional cabinet or corner mantels. IMPORTANT: Only use optional cabinet or corner mantels specified in this manual. Purchase the o ...
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Desa VMH26TNA - page 9
9 104060 OWNER’S MANUAL Figure 10 - Attaching Fireplace to Wall Studs Nailing Flanges Nails or Wood Screws INST ALLA TION Continued 36 5/8" 25 7/8" 51 3/4" 26 7/8" Figure 9 - Rough Opening for Installing in Corner 2. If installing GA3400(T) blower acces- sory , do so at this time. Follow instruc- tions included with blower acc ...
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Desa VMH26TNA - page 10
10 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® 13" 16" 19" 21" 2 1 /2" 6" 8" 10" Note: All vertical measurements are from top of fireplace opening to bottom of mantel shelf. All measurements are in inches. INST ALLA TION Continued Figure 12 - Attaching Brass Trim to Fireplace Shoulder Screws Assembl ...
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Desa VMH26TNA - page 11
11 104060 OWNER’S MANUAL Assembling Brass Trim (Brass trim shipped with mantel) 1. Remove packaging from three remain- ing 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. Slide one end of adjusting plate/shim in slot on mitere ...
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Desa VMH26TNA - page 12
12 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® 4. Carefully disconnect green and white wires at their insulated connectors. 5. In top of the heater cabinet, locate the four mounting holes on the outer cas- ing. Align these four holes with those on the blower bracket assembly . Attach blower bracket assembly to the outer casing with 4 #10 ...
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Desa VMH26TNA - page 13
13 104060 OWNER’S MANUAL 3 2 1 For Built-In Installation WARNING: A licensed elec- trician must connect the wiring harness to electrical supply fol- lowing all local codes. Electri- cian must provide a clamp on the box cover to secure the wir- ing. Wiring should be routed through the bushing in the hole on the outer casing of heater. Figure 19 - ...
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Desa VMH26TNA - page 14
14 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® CONNECTING TO GAS SUPPLY WARNING: A qualified ser- vice person must connect fire- place to gas supply. Follow all local codes. IMPORTANT: Check gas line pressure be- fore connecting fireplace to gas line. Gas line pressure must be no greater than 14 inches of water. If gas line pressure is hi ...
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Desa VMH26TNA - page 15
15 104060 OWNER’S MANUAL INST ALLA TION Continued Figure 23 - Removing Branch Support From Fireplace CONNECTING FIREPLACE TO GAS SUPPLY Installation Items Needed • Phillips screwdriver • sealant (resistant to propane/LP gas, not provided) 1. Remove fireplace screen. Remove two screws that hold fireplace screen in place for shipping. These scr ...
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Desa VMH26TNA - page 16
16 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® O N POSI T O PO S Open Closed Manual Shutoff Valve Figure 25 - Manual Shutoff Valve Gas Meter Figure 26 - Checking Gas Joints Manual Shutoff Valve Test Pressures Equal To or Less Than 1/2 PSIG 1. Close manual shutoff valve (see Fig- ure 25). 2 . Pressurize supply piping system by either using ...
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Desa VMH26TNA - page 17
17 104060 OWNER’S MANUAL OPERA TING FIREPLACE 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. LIGHTING INSTRUCTIONS 1. STOP! Read the safety inf ormation, column 1. 2. Make sur e manual shutoff valve is fully ...
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Desa VMH26TNA - page 18
18 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® TO TURN OFF GAS TO APPLIANCE 1. Follow steps 1 thr ough 5 under Light- ing Instructions , page 17. 2. With contr ol knob pr essed in, str ike match. Hold match to pilot until pi- lot lights. 3. Keep contr ol knob pressed in f or 30 seconds after lighting pilot. After 30 seconds, release contr ...
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Desa VMH26TNA - page 19
19 104060 OWNER’S MANUAL BURNER FLAME PATTERN Figure 32 shows a correct burner flame pattern. Figure 33 shows an incorrect burner flame pattern. The incorrect burner flame pattern shows yellow tipping of the flame. It also shows the flame higher than one inch above the log. Note: When using the fireplace the first time, the flame will be yellow f ...
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Desa VMH26TNA - page 20
20 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® TROUBLESHOOTING POSSIBLE CAUSE 1. Ignitor cable pinched or wet 2. Ignitor electrode not connected to igni- tor cable 3. Broken ignitor cable 4. Bad piezo ignitor 5. Ignitor electrode broken 6. Ignitor electrode positioned wrong 1. Gas supply turned off or manual shutof f valve closed 2. Contr ...
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Desa VMH26TNA - page 21
21 104060 OWNER’S MANUAL 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 Fireplace produces a whistling noise when burner is lit White powder residue forming within burner box or on adjac ...
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Desa VMH26TNA - page 22
22 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® 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 inst ...
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Desa VMH26TNA - page 23
23 104060 OWNER’S MANUAL CLEANING AND MAINTENANCE CABINET Air Passageways • Use a vacuum cleaner or pressurized air to clean. Exterior • Use a soft cloth dampened with a mild soap and water mixture. W ipe the cabi- net to remove dust. WARNING: Turn off fireplace and let cool before cleaning. CAUTION: You must keep con- trol areas, burner, and ...
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Desa VMH26TNA - page 24
24 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® ILLUSTRA TED PAR TS BREAKDOWN VMH26TNA 12-1 12-2 23 29 43 32 36 38 13 7 8 33 43 11 10 27 4 7 30 1 3 2 9 17 19 6 22 31 21 41 26 42 39 40 16 15 18 24 28 5 34 25 20 35-1 4 35-2 12 24 12-1 14 25 14 43 3 37 ...
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Desa VMH26TNA - page 25
25 104060 OWNER’S MANUAL P ARTS LIST VMH26TNA This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions listed under Replacement Parts on page 26 of this manual. KEY NO. PART NO. DESCRIPTION QTY. 1 102633-02CK Outer Casing Top 1 2 102624-02 Outer Casing 1 3 099230-02 Shoulder Screw 12 4 098304-01 Sc ...
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Desa VMH26TNA - page 26
26 104060 COMP ACT CLASSIC HEAR TH FIREPLACE VMH26TNA ® REPLACEMENT PA R T S Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty. PARTS UNDER WARRANTY Contact authorized dealers of this product. If they can’t supply original replacement part(s) call DESA International’s Technica ...
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Desa VMH26TNA - page 27
27 104060 OWNER’S MANUAL ACCESSORIES 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 ad- dress listed on the back page of this manual. CABINET MANTEL WITH BUILT-IN HEARTH BASE Unfi ...
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Desa VMH26TNA - page 28
2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 www.desatech.com 104060-01 REV. D 01/00 LIMITED WARRANTY VENT-FREE NATURAL GAS COMPACT CLASSIC HEARTH ® FIREPLACE DESA International warrants this product to be free from defects in materials and components for four (4) years and five (5) years on stainless steel burners from the da ...
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