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VENT-FREE COMPACT FIREPLACE
® OWNER’S OPERATION AND INSTALLATION MANUAL
For more information, visit www.desatech.com For more information, visit www.desatech.com
VMH26TPB
VMH26TNB
14,000 to 26,000 Btu/Hr
with Thermostat
Shown with Optional
Cabinet Mantel/Hearth
Base Accessory
WARNING: Improper installation, adjust-
WARNING: If the information in this manual is not
ment, alteration, service, or maintenance
followed exactly, a fire or explosion may result
can cause injury or property damage.
causi
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TABLE OF CONTENTS SAFETY INFORMATION 2 TABLE OF CONTENTS CLEANING AND MAINTENANCE ............................................ 19 SAFETY INFORMATION ............................................................ 2 TROUBLESHOOTING .............................................................. 20 LOCAL CODES ........................................................................... 3 SPECIFICATIONS .................................................................... 23 PRODUCT IDENTIFICATION ......
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SAFETY INFORMATION 3 LOCAL CODES 3 PRODUCT IDENTIFICATION SAFETY INFORMATION Continued 1. This appliance is only for use with the type of gas indicated on 15. Operating fireplace above elevations of 4,500 feet could cause the rating plate. This appliance is not convertible for use with pilot outage. other gases. 16. Do not operate fireplace if any log is broken. Do not operate 2. Do not place propane/LP supply tank(s) inside any structure. fireplace if a log is chipped (dime-sized or larger). Lo
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PRODUCT FEATURES 4 UNPACKING ASSEMBLY Assembling Fireplace PRODUCT FEATURES ASSEMBLY SAFETY PILOT WARNING: Always have branch support and screen in place before operating fireplace. This pre- This fireplace has a pilot with an Oxygen Depletion Sensing (ODS) vents excessive temperatures on fireplace surfaces. safety shutoff system. 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. WARNING: Failure to positi
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ASSEMBLY 5 Assembling Fireplace (Cont.) 5 AIR FOR COMBUSTION AND VENTILATION Providing Adequate Ventilation ASSEMBLY Continued While it is good to make your home energy efficient, your home Assembling Hood needs to breathe. Fresh air must enter your home. All fuel-burning 1. Locate four black phillips sheet metal screws from the hard- appliances need fresh air for proper combustion and ventilation. ware packet. Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances 2. Rotate hood
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AIR FOR COMBUSTION AND VENTILATION Providing Adequate Ventilation (Cont.) 6 Determining Fresh-Air Flow for Heater Location AIR FOR COMBUSTION AND VENTILATION Continued 3. Add the Btu/Hr of all fuel burning appliances in the space. Confined and Unconfined Space Vent-free heater _____________ Btu/Hr The National Fuel Gas Code, ANSI Z223.1.3/ NFPA 54 defines a Gas water heater* _____________ Btu/Hr confined space as a space whose volume is less than 50 cubic feet 3 Gas furnace _____________ Btu/Hr
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AIR FOR COMBUSTION AND VENTILATION 7 Ventilation Air 7 INSTALLATION AIR FOR COMBUSTION AND VENTILATION Continued VENTILATION AIR Ventilated Ventilation Air From Inside Building Outlet Attic Air This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must Outlet provide two permanent openings: one within 12" of the ceiling and Air To Attic one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 5)
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INSTALLATION Check Gas Type 8 Installation Items Locating Fireplace INSTALLATION Continued LOCATING FIREPLACE CAUTION: This fireplace creates warm air cur- rents. These currents move heat to wall surfaces next WARNING: Maintain the minimum clearances to fireplace. Installing fireplace next to vinyl or cloth shown in Figures 7 and 8. If you can, provide greater wall coverings or operating fireplace where impurities clearances from floor, ceiling, and joining wall. (such as, but not limited to,
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INSTALLATION 9 Locating Fireplace (Cont.) 9 Built-In Fireplace Installation INSTALLATION Continued 2. If installing GA3450T blower accessory, do so at this time. CAUTION: If you install the fireplace in a home See Installing Blower Accessory GA3450T, page 11. garage Note: If not installing blower accessory, you may wish to run • fireplace pilot and burner must be at least 18 inches electrical wiring to your fireplace for future blower installa- above floor. tion (see Accessories, page 26) Use o
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INSTALLATION Built-In Fireplace Installation (Cont.) 10 Optional Mantel Installation INSTALLATION Continued 10. If using optional brass trim kit, install the trim after final fin- Mantel Clearances for Built-In Installation ishing and/or painting of wall. See instructions included with If placing mantel above built-in fireplace, you must meet minimum brass trim accessory for attaching brass trim. clearance between mantel shelf and top of fireplace opening. IMPORTANT: When finishing your firebox,
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INSTALLATIONS 11 Optional Mantel Installation (Cont.) 11 Installing Blower Accessory - GA3450T INSTALLATION Continued 5. Firmly snap brass trim kit on shoulder screws. Shoulder screws Assembling Brass Trim (Brass Trim Shipped are located on fireplace cabinet (see Figure 13). with Mantel) 6. Align brass trim kit for flush fit around opening. 1. Remove packaging from three remaining pieces of brass trim. 7. Use two 3" wood screws provided and attach fireplace base to 2. Locate two adjusting plates
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3 2 1 INSTALLATION Installing Blower Accessory - GA3450T (Cont.) 12 INSTALLATION Continued 3. Note the wire locations on back of AUTO/OFF/ON switch. Removing Valve Cover Shield The terminals on back of switch are numbered 1, 2, and 3. 1. Open bottom louver assembly by swinging the assembly down Carefully remove red wire from terminal 1 and blue wire from (see Figure 17). terminal 3. Black wire can remain on middle terminal 2 (see 2. Using short Phillips screwdriver, remove the screw under the Fi
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3 2 1 INSTALLATION 13 Installing Blower Accessory - GA3450T(Cont.) 13 INSTALLATION Continued 9. Install the switch plate on the valve cover shield with 2 #10 5. Plug power cord to the outlet receptacle (not provided) as shown screws provided (see Figure 18, page 12). Reinstall the valve in figure 19. Wind the extra cable in power cord and and tie it cover shield. Route power cord out of the cabinet by inserting up with the plastic wire strap (see Figure 21). Set the cable it through the bushing
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INSTALLATION Installing Blower Accessory - GA3450T (Cont.) 14 Attaching Wood Base to Solid Floor Connecting to Gas Supply INSTALLATION Continued For propane/LP units, installer must supply an external regulator. Extension Cord The external regulator will reduce incoming gas pressure. You Use extension cord if needed. The cord must have a three-prong, must reduce incoming gas pressure to between 11 and 14 inches of grounding plug and a three-hole receptacle. Make sure cord is in good water. If yo
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INSTALLATION 15 Connecting to Gas Supply (Cont.) 15 Connecting Equipment Shutoff Valve to Heater Control INSTALLATION Continued We recommend that you install a sediment trap in supply line as CAUTION: Avoid damage to regulator. Hold gas shown in Figure 24. Locate sediment trap where it is within reach for cleaning. Install in piping system between fuel supply and heater. regulator with wrench when connecting it to gas piping and/or fittings. Locate sediment trap where trapped matter is not like
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INSTALLATION 16 Checking Gas Connections INSTALLATION Continued CHECKING GAS CONNECTIONS 3. Make sure control knob of fireplace is in the OFF position. WARNING: Test all gas piping and connections 4. Check all joints from equipment shutoff valve to thermostat for leaks after installing or servicing. Correct all leaks gas valve. Apply a noncorrosive leak detection fluid to gas at once. joints. Bubbles forming show a leak. 5. Correct all leaks at once. WARNING: Never use an open flame to check
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OPERATING FIREPLACE 17 For Your Safety Read Before Lighting 17 Lighting Instructions OPERATING FIREPLACE C-clockwise 5. Turn control knob counterclockwise to the PI- FOR YOUR SAFETY LOT position. Press in control knob for five (5) seconds READ BEFORE LIGHTING (see Figure 30). Note: You may be running this fireplace for the first time WARNING: If you do not follow these instructions after hooking up to gas supply. If so, the control knob may exactly, a fire or explosion may result causing prop-
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OFF ON OPERATING FIREPLACE To Turn Off Gas To Appliance 18 Thermostat Control Operation Manual Lighting Procedure Operating Blower INSPECTING BURNER Pilot Flame Pattern OPERATING FIREPLACE Continued Note: Your fireplace and thermostat blower will not turn on TO TURN OFF GAS and off at the same time. The fireplace may run for several TO APPLIANCE minutes before the blower turns on. After the heater modulates Shutting Off Fireplace to the pilot position, the blower will continue to run. The blower
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INSPECTING BURNER 19 Burner Flame Pattern 19 CLEANING AND MAINTENANCE Cleaning Burner Injector Holder and Pilot Air Inlet Hole Cabinet INSPECTING BURNER Continued heating season. Blocked air holes will create soot. We recommend BURNER FLAME PATTERN that you clean the unit every three months during operation and have Figure 35 shows a correct burner flame pattern. Figure 36 shows an heater inspected yearly by a qualified service person. incorrect burner flame pattern. The incorrect burner flame p
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TROUBLESHOOTING 20 TROUBLESHOOTING Note: For additional help, visit DESA’s WARNING: Turn off and unplug CAUTION: Never use a wire, technical service web site at fireplace and let cool before servic- needle, or similar object to clean www.desatech.com. ing. Only a qualified service person ODS/pilot. This can damage ODS/ Note: All troubleshooting items are listed in should service and repair fireplace. pilot unit. order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is
