B-VENT DECORATIVE GAS FIREPLACE OWNER’S OPERATION AND INSTALLATION MANUAL O-TL REPORT # 114-F-16-4 Natural Gas models m36(b,h), m42(b,h), VM36(B,H) and VM42(B,H) Propane/LP Gas models m36P(b,h), m42P(b,h), VM36P(B,H) and VM42P(B,H) WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.
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 assistance or additional information consult a qualified installer, service agency or the gas supplier. NOT FOR USE WITH SOLID FUEL CHECK LOCAL CODES PRIOR TO INSTALLATION SAVE THIS BOOK This book is valuable.
Safety WARNING: This product contains and/or generates chemicals known to the State of California to cause cancer or birth defects or other reproductive harm. IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate or service this fireplace. Improper use of this fireplace can cause serious injury or death from burns, fire, explosions, electrical shock and carbon monoxide poisoning.
Safety Continued 11. Keep the area around your fireplace clear of combustible materials, gasoline and other flammable vapor and liquids. Do not run fireplace where these are used or stored. Do not place items such as clothing or decorations on or around fireplace. 12. Do not use this fireplace to cook food or burn paper or other objects. 13. Do not use any solid fuels (wood, coal, paper, cardboard, etc.) in this fireplace. Use only the gas type indicated on fireplace nameplate. 14.
Introduction Continued The installation must conform with local codes or, in the absence of local codes, with the current National Fuel Gas Code, ANSI Z223.1/ NFPA 54. This appliance complies with ANSI Z21.50/CSA 2.22. WARNING: Installation of this appliance should be done by a qualified service person well trained in the installation of such appliances. You will also need a building permit from your local Building and Safety Commissioner before installing this appliance; otherwise your insurance co.
Product Specifications GAS RATING - NATURAL M36(B,H), VM36(B,H) M42(B,H), VM42(B,H) Max. Input Rating: 40,000 Btu/Hr 45,000 Btu/Hr Manifold Pressure: 3.5" WC (.87 kPa) 3.5" WC (.87 kPa) Minimum Supply Pressure: 4.5" WC (1.12 kPa) 4.5" WC (1.12 kPa) Maximum Supply Pressure: 10.5" WC (2.66 kPa) 10.5" WC (2.66 kPa) Orifice Size: # 30 # 29 GAS RATING - PROPANE/LP M36P(B,H), VM36P(B,H) M42P(B,H), VM42P(B,H) Max. Input Rating: 40,000 Btu/Hr 45,000 Btu/Hr Manifold Pressure: 10" WC (2.49 kPa) 10" WC (2.
Pre-Installation Preparation CLEARANCES Minimum clearances to combustibles are: Back and Sides of Outer Surround 0" min. Drywall to Sides of Front Face (Nailing Flanges) 0" min. “B” Vent Surfaces 1" min. Ceiling to Opening 42" min. Floor 0" min. Perpendicular Wall See Figure 6 CAUTION: Do not block required air spaces with insulation or any other material. Do not obstruct effective opening of appliance with any type of facing material.
Pre-Installation Preparation Continued FRAMING 1. Frame appliance enclosure as illustrated in Figures 7 and 8. Note: If a wall covering is used to line the enclosure, then all measurements must be from the surface of the covering. 2. Place the appliance into the framing and secure it. Note: If appliance is to be raised above floor level, a platform must be built to support the appliance. 3.
Pre-Installation Preparation Continued Installing Transition Pipe and Starter Collar The transition pipe and starter collar shown in Figure 9 are supplied with the fireplace, unattached and ready for installation. Remove starter collar and set aside. Slide transition pipe over vent collar and attach with a minimum of three screws. Replace starter collar over transition pipe and attach using four screws located on leg stands (five used on model M42).
Venting INSTALLATION Continued Listed Vent Cap Listed Vent Cap Listed Vent Cap Maintain Listed Clearance Maintain Listed Clearance Support Each Lateral At Least Every 6 Feet 60° 8' Position 12' Min. Firestop 6' Position Firestop Maintain Listed Clearance EXAMPLE 1 45° Maintain Listed Clearance Maintain Listed Clearance 45° 12' Min. Position Firestop 45° 10' 12' Min.
Venting INSTALLATION Continued CHECKING FOR PROPER VENTING After completing and checking electrical, gas and vent connections, follow the lighting instructions and allow main burner to run for approximately 5 minutes. Hold a lighted match or cigarette near the top edge of fireplace opening and play it along entire length of opening (see Figure 12). Proper venting should tend to draw the flame or smoke into the appliance.
Installation Continued OPTIONAL Wireless hand-held REMOTE CONTROL Installation Note: If using optional wireless hand-held remote control, the wall switch is no longer operational. Installing Receiver 1. Remove front refractory access panel by lifting up and angling out of firebox opening (see Figure 13, page 11) to expose controls. 2. Disconnect wall switch wires from TH and TH/TP terminals on control valve (see Figure 14). 3.
Installation Continued Installing 9-Volt Battery in Hand-Held Remote Control Unit 1. Remove battery cover on back of remote control unit. 2. Attach terminal wires to battery (not included). Place battery into battery housing. Note: Only use alkaline battery. 3. Replace battery cover onto remote control unit. Remote Battery Cover Control Unit DESA Heating, LLC recommends that a black iron gas line be routed from the gas source, through a sediment trap (see Figure 20) and into appliance.
Installation Continued CAUTION: Compounds used on threaded joints of gas piping shall be resistant to the action of Liquefied Petroleum (LP or propane) and should be applied lightly to ensure excess sealant does not enter the gas line. WARNING: All gas piping and connections must be tested for leaks after the installation is completed. After ensuring that the gas valve is on, apply a commercial leak detection solution to all connections and joints. If bubbles appear, leaks can be detected and corrected.
Installation Continued Grate 0.5" Pan and Ember Material 0.5" Burner Pan Figure 24 - Pan and Ember Material Clearances LOG PLACEMENT For M36, M36P, VM36 and VM36P Models 1. Place small front right log (log 1) on right front of grate as shown in Figure 25. 2. Place large back log (log 2) onto grate making sure notches rest over grate as shown in Figure 25. 3. Place log 3 into notch on log 2, resting front end on top of log 1 (see Figure 26). 4.
Installation Continued LOG PLACEMENT For M42, M42P, VM42 and VM42P Models 1. Place large back log (log 1) onto grate making sure notches rest over grate (see Figure 29). 2. Insert lower end of log 2A between first two grate fingers and position upper end into notch on front of log 1. See Figure 29. Place log 2B on front right side of grate as shown in Figure 29. 3. Place log 3 into notch on top left of log 1, resting lower end on left two grate fingers (see Figure 30). 4.
Installation Continued COMBUSTION AIR KIT MODEL AK4 (OPTIONAL) The outside air kit may be installed on the left side of fireplace only. The vent can be installed through any outside wall a minimum of three feet below fireplace termination cap. The handle to operate damper door for outside air inlet will be located inside the left “screen pocket” of firebox (see Figure 33). Pull handle to open or push to close. CAUTION: Air inlet ducts are not to terminate in attic space.
Installation Continued 6. Repeat the process for the opposite door assembly. 7. To adjust doors, slide them partially open. Using a screwdriver, loosen hold-down screws in the spring clip (see Figure 36) and pivot plate. 8. Close both doors until evenly joined at the middle and note the gap at outer edges of face. 9. Reopen one door at a time and retighten upper and lower hold-down screws. 10. Repeat process until both doors are evenly joined, spaced and working freely.
Operation FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
Operation Continued TO TURN OFF GAS TO APPLIANCE 1. Turn off wall switch. 2. Turn off all electric power to appliance if service is to be performed. 3. Fully open glass doors if installed. 4. Remove front hearth brick and control access panel. 5. Turn gas control knob clockwise to OFF. Do not force. 6. Replace front refractory brick access panel. 7. Fully close glass doors if installed.
inspecting burners Continued Thermopile Pilot Burner Figure 43 shows a typical flame pattern. If burner flame pattern differs from that described: • turn appliance off (see To Turn Off Gas to Appliance, page 20) • see Troubleshooting, page 23 Ignitor Figure 42 - Correct Pilot Flame Pattern BURNER FLAME PATTERN Burner flames will be steady, not lifting or floating. Flames should go up through the middle of logset. Flames should not "spill" to edges of pan or sides of logset.
Wiring Diagram PILOT BURNER THERMOPILE IGNITOR REPLACE FACTORY WIRING WITH 105°C EQUIVALENT OR HIGHER RATING EXTERNAL WIRING USE ONLY CLASS 2 THERMOSTAT WIRE 18 GA. RED/WHITE PILOT GAS LINE DO NOT CONNECT TO 120V RED WHITE N.O. SW N.C.SW TH PI L OT ON TP O MANUAL DAMPER SWITCH FF TH/TP INCOMING MAIN GAS SUPPLY (VENT SAFETY SHUTOFF SWITCH) PILOT SAFETY WIRE WALL SWITCH (NOT SUPPLIED) Replacement Parts Note: Use only original replacement parts.
Troubleshooting Note: Before troubleshooting the system, make sure the gas shutoff valve is ON. The two most common causes of a malfunctioning gas appliance are: 1. Loose wiring connections 2. Construction debris clogging pilot and/or gas control valve filter OBSERVED PROBLEM POSSIBLE CAUSE Pilot will not light 1. No gas supply or shutoff 1. Check to see if you have valve is OFF gas supply 2. Air in gas line 2. Hold regulator control valve in the PILOT position for 2 to 3 minutes to purge air.
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Pilot goes out when wall switch 1. Millivolt output on thermo- 1. Replace thermopile is ON pile too high Spark ignitor will not light pilot 1. Defective ignitor (no spark 1. Check for spark at electrode after repeated triggering of at electrode) and pilot. If no spark and red button electrode wire is properly connected, replace ignitor 2. Defective pilot or misaligned 2. Using a match, light pilot.
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 instructions. • If you cannot reach your gas supplier, call the fire department. IMPORTANT: Operating fireplace where impurities in air exist may create odors.
Parts Models M36(B,H), M36P(B,H), M42(B,H), M42P(B,H), VM36(B,H), VM36P(B,H), VM42(B,H) and VM42P(B,H) 43 21 8 32 26 28 31 27 37 36 38 LP 35 34 8 10 11 30 6 33 34 35 NG 29 1 2 2 24 11 22 18 25 4 14 12 25 3 15 17 16 7 13 9 42 46 19 40 41 39 5 45 47 20 44 7 47 26 www.desatech.
Parts This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 22 of this manual. KEY M36(B,H) M42(B,H) NO.
Parts brick liners for models M36(B,H), M36P(B,H), VM36(B,H) and VM36P(B,H) 14 12 16 13 15 KEY M36(B,H) NO.
Parts Logsets for models M36(B,H), M36P(B,H), VM36(B,H) and VM36P(B,H) 5 4 6 3 5 4 2 3 1 KEY PART NO. NUMBER DESCRIPTION 1 2 3 4 5 6 Log Set Right Front 9" Split Log Rear Log Top Right Log - 11 3/4" Top Right Log - 16" Top Left Log - 13 1/2" Y-Log Top Left Log - 11" 107999-01 108724-01 901098-01 108720-01 108721-01 108722-01 108723-01 QTY. 1 1 1 1 1 1 1 2A 2B 108795-01V www.desatech.
5 PARTS 4 for Logsets models M42(B,H), M42P(B,H), VM42(B,H) and VM42P(B,H) 3 5 4 3 1 6 1 2A 2B 30 KEY PART NO. NUMBER DESCRIPTION 1 2A 2B 3 4 5 6 Log Set Rear Log Left Front Log - 11" Right Front Log - 15 3/4" Round Top Left Log - 13 1/2" Y-Log Inside Top Left Log - 15 3/4" Split Inside Top Right Log - 16" Top Right Log - 11 3/4" 107999-02 901098-02 108723-01 108839-01 108722-01 108838-01 108721-01 108720-01 www.desatech.com QTY.
Accessories Notice: All accessories may not be available for all fireplace models. Purchase these accessories from your local dealer. If they can not supply these accessories call DESA Heating, LLC at 1-866-672-6040 for information. You can also write to the address listed on the back page of this manual. Air kit - AK4 Blower Kit Optional kit helps offset the negative pressure often existing in today's tightly constructed homes.
Warranty KEEP THIS WARRANTY Model (located on product or identification tag)______________________________ Serial No. (located on product or identification tag)___________________________ Date Purchased ___________________________ Keep receipt for warranty verification.