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UNVENTED (VENT-FREE) GAS
LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
For more information, visit www.desatech.com For more information, visit www.desatech.com
Also Design-Certified As A Vented Decorative Appliance
®
FLAME-MAX
Multi-Sided
Log Design
VML27NR
VML27PR
Remote Control
Patent Pending
Ready Model
WARNING: Improper installation, adjust-
WARNING: If the information in this manual is
ment, alteration, service, or maintenance
not followed exactly, a fire or explosio
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TABLE OF CONTENTS SAFETY INFORMATION 2 TABLE OF CONTENTS SAFETY INFORMATION ............................................................ 2 WIRING DIAGRAM ................................................................... 18 PRODUCT IDENTIFICATION ..................................................... 3 TROUBLESHOOTING .............................................................. 19 LOCAL CODES ........................................................................... 3 ILLUSTRATED PARTS BREAKD
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L L I I P P F F F F O O L L O O SAFETY INFORMATION 3 PRODUCT IDENTIFICATION 3 LOCAL CODES SAFETY INFORMATION Continued 1. This appliance is only for use with the type of gas indicated 15. Do not use heater if any part has been exposed to or under on the rating plate. This appliance is not convertible for use water. Immediately call a qualified service technician to in- with other gases. spect the room heater and to replace any part of the control system and any gas control which has been under w
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UNPACKING 4 PRODUCT FEATURES REMOTE CONTROL ACCESSORIES AIR FOR COMBUSTION AND VENTILATION Providing Adequate Ventilation UNPACKING AIR FOR COMBUSTION AND VENTILATION CAUTION: Do not remove the data plates from the grate assembly. The data plates contain important WARNING: This heater shall not be installed in a warranty and safety information. confined space or unusually tight construction un- less provisions are provided for adequate combus- 1. Remove logs and heater base assembly from carto
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AIR FOR COMBUSTION AND VENTILATION 5 Providing Adequate Ventilation (Cont.) 5 Determining Fresh-Air Flow For Heater Location AIR FOR COMBUSTION AND VENTILATION Continued c. caulking or sealants are applied to areas such as 3. Add the Btu/Hr of all fuel burning appliances in the space. joints around window and door frames, between sole Vent-free heater _____________ Btu/Hr plates and floors, between wall-ceiling joints, between Gas water heater* _____________ Btu/Hr wall panels, at penetrations f
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AIR FOR COMBUSTION AND VENTILATION Ventilation Air 6 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 Air provide two permanent openings: one within 12" of the ceiling and To Attic one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2).
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INSTALLATION 7 Check Gas Type 7 Installation and Clearances INSTALLATION Continued MINIMUM FIREPLACE CLEARANCE TO WARNING: Seal any fresh air vents or ash clean- out doors located on floor or wall of fireplace. If not, COMBUSTIBLE MATERIALS drafting may cause pilot outage or sooting. Use a Log Size Side Wall Ceiling heat-resistant sealant. Do not seal chimney flue 27" 16" 42" damper. LOG SIZING REQUIREMENTS WARNING: Never install the heater Log Minimum Firebox • in a bedroom or bathroom unless
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INSTALLATION Installation and Clearances (Cont.) 8 Mantel Clearances INSTALLATION Continued Minimum Noncombustible Material Clearances MANTEL CLEARANCES In addition to meeting noncombustible material clearances, you If Not Using Mantel must also meet required clearances between fireplace openings and Note: If using a mantel, proceed to If Using Mantel. If not using a mantel shelf on each side of the fireplace. If you do not meet the mantel, follow the information below. clearances listed below,
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INSTALLATION 9 Mantel Clearances (Cont.) 9 Floor Clearances Installing Damper Clamp Accessory for Vented Operation INSTALLATION Continued Mantel Shelf If reasons number 1 or 2 above apply to you, you must permanently 12" Underside of open chimney flue damper. You must install the damper clamp 10" Mantel Shelf accessory (to order, see Accessories, page 27). This will insure vented 8" operation (see Figure 10). The damper clamp will keep damper open. 6" 1 2 /2" Installation instructions are includ
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L L I I P P F F F F O O L L O O INSTALLATION 10 Installing Heater Base Assembly Installing Optional Remote Control Accessories INSTALLATION Continued 8. Remove heater base from fireplace. If installing optional con- INSTALLING HEATER BASE ASSEMBLY trol accessories, do so at this time. Follow all directions pro- vided with accessory. See Installing Optional Remote Control CAUTION: Do not remove the data plates attached Accessories, below. to the heater base assembly. The data plates contain 9. D
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INSTALLATION 11 Installing Optional Remote Control Accessories 11 Connecting To Gas Supply INSTALLATION Continued Remote Push Button CONNECTING TO GAS SUPPLY Receiver Clips Terminal Wires WARNING: A qualified service person must con- nect heater to gas supply. Follow all local codes. Bracket Battery Clip Pad WARNING: Never connect propane/LP heater di- 9-Volt Battery rectly to the propane/LP supply. This heater requires an external regulator (not supplied). Install the external Figure 14 - Inst
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INSTALLATION Connecting To Gas Supply (Cont.) 12 Checking Gas Connections INSTALLATION Continued Natural Gas Installation must include an equipment shutoff valve, union, and From Gas Meter plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook CSA Design- (5" W.C.** to 10.5" up. NPT tap must be upstream from heater (see Figure 19). Certified Equipment W.C. Pressure) Shutoff Valve With IMPORTANT: Install equipment shutoff valve in an accessible Propane/LP Gas 1/8" NPT Tap* Approved
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L L I I P P F F F F O O L L O O INSTALLATION 13 Checking Gas Connections (Cont.) 13 Installing Logs INSTALLATION Continued 4. Check all joints of gas supply piping system. Apply a non- Pressure Testing Heater Gas Connections corrosive leak detection fluid to gas joints. Bubbles forming 1. Open equipment shutoff valve (see Figure 20). show a leak. 2. Open main gas valve located on or near gas meter for natural 5. Correct all leaks at once. gas or open propane/LP supply tank valve. 6. Reconnect he
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L L L L L L I I I I I I P P P P P P F F F F F F F F F F F F O O O O O O L L L L L L O O O O O O INSTALLATION Installing Logs (Cont.) 14 OPERATING HEATER For Your Safety Read Before Lighting INSTALLATION Continued 2. Position left front log (#2) onto two pins on left front and middle Control Cover of base log (see Figure 25). Log (#5) 3. Place right rear log (#3) onto two pins on right rear of base log (see Figure 26). 4. Place right front log (#4) onto two pins on right front of base log (see Fi
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O L I P F F O H I L OPERATING HEATER 15 Lighting Instructions 15 OPERATING HEATER Continued 7. With control knob pressed in, press and release ignitor but- LIGHTING ton. This will light pilot. The pilot is attached to the front INSTRUCTIONS burner. If needed, keep pressing ignitor button until pilot lights. Note: If pilot does not stay lit, contact a qualified service WARNING: person or gas supplier for repairs. Until repairs are made, • If fireplace has glass doors, never operate this light pi
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N O T O H L I I L OPERATING HEATER To Turn Off Gas To Appliance 16 Manual Lighting Procedure Optional Hand-Held Remote Operation OPERATING HEATER Continued 1. After lighting, let pilot flame burn for about one minute. TO TURN OFF GAS Turn control knob to ON position. Adjust flame adjustment TO APPLIANCE knob anywhere between HI and LO. Slide the selector switch to the REMOTE position (see Figure 52). Note: The burner Shutting Off Heater may light if hand-held remote was on when selector switch 1
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OPERATING HEATER 17 Optional Hand-Held Remote Operation (Cont.) 17 INSPECTING BURNERS Pilot Flame Pattern Burner Primary Air Holes Main Burner OPERATING HEATER Continued 2. The receiver continuously receives signals from the hand- Manual Mode held remote to control the room temperature. If the hand- 1. Press the POWER and LOCK buttons together to turn on held remote is misplaced, obstructed, or for any reason the hand-held remote control. cannot transmit to the receiver, the receiver will shut o
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CLEANING AND MAINTENANCE Cleaning Burner Injector Holder And Pilot Air Inlet Hole 18 Logs WIRING DIAGRAM CLEANING AND MAINTENANCE Burner WARNING: Turn off heater and let cool before Tube cleaning. Injector Holder CAUTION: You must keep control areas, burner, and circulating air passageways of heater clean. In- Primary Air Inlet Holes spect these areas of heater before each use. Have (Shape of Holes May heater inspected yearly by a qualified service person. Vary by Model) Heater may need more f
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TROUBLESHOOTING 19 19 TROUBLESHOOTING Note: For additional help, visit DESA WARNING: Turn off heater CAUTION: Never use a wire, Heating Products' technical service web and let cool before servicing. needle, or similar object to clean site at www.desatech.com. Only a qualified service person ODS/pilot. This can damage ODS/ Note: All troubleshooting items are listed in should service and repair heater. pilot unit. order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is
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TROUBLESHOOTING 20 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner does not light after ODS/pilot is lit 1. Burner orifice clogged 1. Clean burner (see Cleaning and Mainte- nance, page 18) or replace burner orifice 2. Inlet gas pressure is too low 2. Contact local natural or propane/LP gas company 3. Thermopile leads disconnected or im- 3. Reconnect leads (see Wiring Diagram, properly connected page 18) 4. Burners will not come on in remote 4. Replace battery in transmitt
