Desa M36P(B,H) User's Manual
Contents
1. 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 open ing 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 Install remote receiver unit onto mounting bracket using two plastic mounting clips see Figure 15 To Safety Circuit Note If any of the original wire as supplied must be replaced use 18 AWG TYPE CL2 UL 105 C 25 ft length MAXIMUM or equivalent Receiver Plastic Mounting Clips Mounting Bracket Figure 15 Installing Remote Receiver Shown from Rear of Mounting Bracket 12 www desatech com 4 Connect wires to control circuit Connect white wire to terminal marked TH TP on control valve Connect red wire to male blade connector provided at open end of safety circuit wiring see Wiring Diagram page 22 5 Locate battery clip mounted on back of receiver see Figure 16 6 Slide 9 volt battery not included through clip Note Only use alkaline battery 7 Attach terminal wires to battery see Fig ure 16 8 Replace refractory brick access panel Route Millivolt Wall Switch Wires Supplied Not Supplied2. 36 Brushed Brass LT36P 36 Platinum LT36PB 36 Polished Brass LT42B 42 Brushed Brass LT42P 42 Platinum LT42PB 42 for VM42 B H Polished Brass FACE LOUVER PANEL KITS SP36 SP42 Smooth Faced Black SL36 SL42 Stamped Black RL36 RL42 Rolled Black FP36 FP42 Filigree Black FP36B FP42B Filigree Brushed Brass FP36P FP42P Filigree Platinum FP36PB FP42PB Filigree Polished Brass FIRE CRACKLE CF6 A Creates the sound of a real burning fire PROPANE NATURAL GAS CONVERSION KIT Not Shown PCBM 36 Propane LP Gas Millivolt Models NCBM 36 Natural Gas Millivolt Models PCBM 42 Propane LP Gas Millivolt Models NCBM 42 Natural Gas Millivolt Models www desatech com 31 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 DESA HEATING LLC LIMITED WARRANTIES New Products Standard Warranty DESA Heating LLC warrants this new product and any parts thereof to be free from defects in material and workmanship for a period of four 4 years from the date of first purchase from an authorized dealer provided the product has been installed maintained and operated in accordance with DESA Heating LLC s warnings and instructions For products purchased for commercial industrial or rental usage this warranty is limited to 90 days from the date of f
3. 0 38 WARNING This appliance Over 7 12 to 8 12 1 5 0 46 must be properly connected Over 8 12 to 9 12 2 0 0 61 to a system and must not be Over 9 12 to 10 12 2 5 0 76 connected to a chimney flue Over 10 12 to 11 12 3 25 0 99 servicing a separate solid fuel Over 11 12 to 12 12 40 122 burning appliance Over 12 12 to 14 12 5 0 1 52 Over 14 12 to 16 12 6 0 1 83 Over 16 12 to 18 12 7 0 2 13 Over 18 12 to 20 12 1 5 2 27 Over 20 12 to 21 12 8 0 2 44 www desatech com Figure 11 B Vent Terminations 108795 01V 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 fire place 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 Improper venting or escaping of spillage of burned gas is indicated when the match flickers or goes out Smoke from a cigarette will also tend to disperse away from the appliance If appliance is found to be improperly vent ing shut it off and notify your installer or a qualified service agency to inspect the vent ing system NOTICE This appliance is equipped with a vent safety shutoff switch which will shut down the appliance in the case of a venting problem Do not bypass th
4. 108167 01 106662 02 108168 02 106662 01 M42 B H VM42 B H 107812 02 108169 02 107812 01 108169 01 107814 02 108170 02 107814 01 108170 01 107816 02 108171 02 107816 01 108171 01 107818 02 108172 02 107818 01 108172 01 107820 02 108173 02 107820 01 108173 01 DESCRIPTION Left Refractory Std Brick M36B M42B Left Refractory Herringbone M36H M42H Left Refractory Std Brick VM36B VM42B Left Refractory Herringbone VM36H VM42H Right Refractory Std Brick M36B M42B Right Refractory Herringbone M36H M42H Right Refractory Std Brick VM36B VM42B Right Refractory Herringbone VM36H VM42H Rear Refractory Std Brick M36B M42B Rear Refractory Herringbone M36H M42H Rear Refractory Std Brick VM36B VM42B Rear Refractory Herringbone VM36H VM42H Bottom Rear Refractory Std Brick M36 M42 M36B M42B Bottom Rear Refractory Herringbone M36H M42H Bottom Rear Refractory Std Brick VM36 VM42 VM36B VM42B f Bottom Rear Refractory Herringbone VM36H VM42H Bottom Front Refractory Std Brick M36 M42 M36B M42B Bottom Front Refractory Herringbone M36H M42H Bottom Front Refractory Std Brick VM36 VM42 VM36B VM42B Bottom Front Refractory Herringbone VM36H VM42H x 1 www desatech com 108795 01V PARTS LOGSETS FOR MODELS M36 B H M36P B H VM36 B H AND VM36P B H 7 M J 0 7 LZ LEY a
5. 11 page 10 www desatech com 9 VENTING INSTALLATION Continued Listed Vent Cap Listed um a V 1 AMaintain i 1 Listed li Listed Clearance Clearance NMaintain Bv Support Each Maintain Listed 111 Lateral At _ Listed Clearance bi Least E Clearance Green ki 12 Min Va 9 8 Position Position 12 Min Firestop 6 Position Firestop 12 Min Firestop tI 3 NS Maintain NS Maintain Listed Listed Listed Clearance Clearance Clearance L EXAMPLE 1 EXAMPLE 2 EXAMPLE 3 Figure 10 Typical B Vent Configuration Some codes areas allow the use of existing west B type vent systems if the system is at or Discharge Vent Cap above the recommended diameter of the flue CPe ing in this case 6 8 Ft Min The flue connection must be made using Listed x listed B type connectors and the existing oar lt system must be code inspected for damage Roof Pitch x 12 and proper installation an Listed Clearance It is not recommended that this appliance be pee common vented with an existing gas burning From Roof L appliance H Min Note Before connecting this appliance to an mo Roof Pitch Feet Meter existing vent system consult with your local architect planner or building official Flatto 6 12 1 0 ax 0 30 6 12 to 7 12 1 25
6. Bowling Green KY 42101 108795 01 108795 01 www desatech com Rev V NOT A UPC 1 866 672 6040 08 08
7. KITS RC Standard On Off Millivolt Remote Con trol Kit HRC100 Hand Held GWMTI1 Wall Mount PROPANE CONVERSION KITS PCBM 36 Propane Conversion Kit for 36 B Vent Millivolt Fireplace PCBM 42 Propane Conversion Kit for 42 B Vent Millivolt Fireplace EXTRUDED ALUMINUM BI FOLD GLASS DOORS BD36 36 Black Finish BD36B 36 Brushed Brass Finish BD36P 36 Platinum Finish BD42 42 Black Finish BD42B 42 Brushed Brass Finish BD42P 42 Platinum Finish FIXED GLASS DOORS FD36 36 Black Finish FD36B 36 Brushed Brass Finish FD36P 36 Platinum Finish FD42 42 Black Finish FD42B 42 Brushed Brass Finish FD42P 42 Platinum Finish BRICK LINER KIT For M36 B H M36P B H M42 B H and M42P B H BL36 36 Refractory Standard Brick BL42 42 Refractory Standard Brick BL36H 36 Refractory Herringbone Brick BL42H 42 Refractory Herringbone Brick For VM36 B H VM36P B H VM42 B H and VM42P B H BL36S 36 Refractory Standard Brick BL42S 42 Refractory Standard Brick BL36HS 36 Refractory Herringbone Brick BL42HS 42 Refractory Herringbone Brick 108795 01V BLOWER KIT BK Squirrel Cage Blower With Speed Control PERIMETER TRIM PT36 36 Black PT36B 36 Brushed Brass PT36PB 36 Polished Brass PT36P 36 Platinum PT42 42 Black PT42B 42 Brushed Brass PT42PB 42 Polished Brass PT42P 42 Platinum LOUVER TRIM KIT Rolled Louvers Only LT36B
8. OFF Air in gas line 1 2 Check to see if you have gas supply Hold regulator control valve in the PILOT position for 2 to 3 minutes to purge air If you smell gas stop and wait for a few minutes before trying to light fireplace 3 Construction debris clog 3 Remove debris and dirt ging pilot orifice inspect and clean any other possible obstructions 4 Low gas pressure 4 Contact your gas supplier 5 Control valve knob is noton 5 Refer to section on pilot the PILOT position lighting 6 Kinked pilot line 6 Have a qualified technician replace pilot line 7 Bad valve 7 Replace regulator valve see Accessories page 31 8 Vent damper not fully 8 Open vent damper until fully open locked in OPEN position Pilot will not stay lit Loose wiring on thermopile to regulator valve No mil livolt current is being sent back to regulator Check wiring connections Refer to wiring diagram shown in Wall Switch Instal lation page 11 2 If valve knob and wall 2 Have a qualified technician Switch are in the ON posi replace valve tion probable defective regulator valve 3 Vent damper not fully 3 Open vent damper until fully open locked in OPEN position No gasto burner although wall 1 Wall switch wires defective 1 Check electrical connec Switch and valve are setto the or too long tions ON position 2 Thermopile not generating 2 See Pilot will not stay lit sufficient voltage above Frequen
9. Through Gas Line Conduit Sleeve To Thermopile fi mn o OUO Back View Battery Clip AK Terminal Wires Receiver Figure 16 Installing Battery in Receiver 108795 01 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 hous ing Note Only use alkaline battery 3 Replace battery cover onto remote control unit Remote Battery Cover Control Unit Terminal Wires 2 E Battery 9 Volt 2 Housing Battery Figure 17 Installing Battery in Hand Held Remote Control Unit GAS LINE HOOK UP WARNING Gas line hookup should be done by your gas supplier or a qualified service person Ad WARNING Before you pro ceed make sure your gas supply is OFF A manual shutoff valve has been included in the appliance s gas supply system You may consider installing an extra gas shutoff valve outside appliance s enclosure check with local codes where it can be accessed more conveniently with a key through a wall as shown in Figure 18 In conformance with local codes route a 1 2 NPT gas line to appliance through hole in left side of firebox or sub floor as shown in Figure 19 CAUTION Do not kink flex ible gas line 108795 01V DESA Heating LLC recommends that a black iron
10. call your service technician or gas supplier Turn gas control knob counterclockwise K toO Knob can be turned to ON only if the control knob is popped out Replace front refractory brick access panel Fully close glass doors if installed Turn on all electric power to appliance Gas Control Knob Pilot Adjustment Screw A www desatech com Position Indicator Figure 39 Control Knob in the PILOT position 1 OPERATION Continued TO TURN OFF GAS TO APPLIANCE Turn off wall switch Turn off all electric power to appliance if Service is to be performed Fully open glass doors if installed Remove front hearth brick and control access panel Turn gas control knob clockwise w to OFF Do not force Replace front refractory brick access panel Fully close glass doors if installed Pilot Burner Thermopile Ignitor Figure 40 Pilot OPTIONAL HAND HELD REMOTE OPERATION Note The receiver and hand held remote control kit must be purchased separately see Accessories page 31 Follow installation instructions on page 10 of this manual de of After lighting let pilot flame burn for about one minute Turn control knob to the ON position Slide the selector switch to the REMOTE position Note Burner may light if hand held remote was on when selector switch was last turned off You can now turn burner on an
11. gas supplier NOT FOR USE WITH SOLID FUEL CHECK LOCAL CODES PRIOR TO INSTALLATION SAVE THIS BOOK This book is valuable In addition to instructing you on how to install and maintain your appliance it also con tains information that will enable you to obtain replace ment parts or optional accessory items when needed Keep it with your other important papers This appliance may be installed in an aftermarket per manently located manufactured mobile home where not prohibited by state or local codes This appliance is only for use with the type of gas indi cated on the rating plate This appliance is not convertible for use with other gases unless a certified kit is used Aftermarket Completion of sale not for purpose of resale from the manufacturer State of Massachusetts The installation must be made by alicensed plumber or gas fitter in the Commonwealth of Massachusetts TABLE OF CONTENTS Cleaning and Maintenance Unpacking 4 Wiring Diagram Introduction Replacement Parts Selecting Location 5 Service Hints Safety Product Technical Service Pre Installation Preparatio tad Troubleshooting Venting Installation es Patris Installation s Accessories ou M uu WAatranty cisci ak an eee ape Inspecting
12. is added to each of these gases The odor helps you detect a gas leak However the odor added to these gases can fade Gas may be present even though no odor exists Make certain you read and understand all warnings Keep this manual for reference It is your guide to safe and proper operation of this fireplace WARNING Any change to this fireplace or its controls can be dangerous 1 10 This appliance is only for use with the type of gas indicated on the rating plate This appliance is not convertible for use with other gases unless a certified kit is used For propane LP fireplace do not place propane LP supply tank s inside any structure Locate propane LP supply tank s outdoors To prevent performance problems do not use propane LP fuel tank of less than 100 Ibs capacity 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 you gas supplier call the fire department Never install the fireplace in a recreational vehicle where curtains furniture clothing or other flammable objects are less than 42 from front top or sides of fireplace in high traffic areas in windy or drafty areas This fireplace reaches high temperatures Keep children and adult
13. pipe and attach with either a minimum of two Screws or other means approved by the vent manufacturer B Vent Piping Starter Collar Figure 9 Installing Transition Pipe and Starter Collar VENTING INSTALLATION A B type venting system must be connected to the appliance for venting to the outside of the building The following section is provided as a guide to a standard B type vent installation Standing codes requirements concerning B type vent installations may vary within your state province or local codes jurisdiction Therefore it is recommended that you check with your local building codes for specific requirements or in absence of local codes follow Section 7 0 of the current National Fuel Gas Code ANSI Z223 1 NFPA 54 This gas appliance must be vented to the outdoors only and may not be terminated into an attic space or into a chimney flue servicing a solid fuel burning appliance This appliance may be vented through a manufactured chimney system or a masonry chimney using a B vent adapter or a chim ney liner system if all are listed inspected and approved by local codes and or building authorities The examples shown in Figure 10 page 10 are typical of most B vent installations and codes practices Example 1 Shows the minimum allowable System height and lateral offset for a 60 or greater inclination Code specifies that offsets at 60 or greater are considered horizontal and must fol
14. wood coal paper cardboard etc in this fireplace Use only the gas type indicated on fire place nameplate 14 This appliance when installed must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI NFPA 70 orthe Canadian Electrical Code CSA C22 1 15 Do not obstruct the flow of combustion and ventilation air in any way Provide adequate clearances around air open ings into the combustion chamber along with adequate accessibility clearance for servicing and proper operation 16 Do not install fireplace directly on carpet ing vinyl tile or any combustible material other than wood The fireplace must set on a metal or wood panel extending the full width and depth of the fireplace 17 Do not use fireplace if any part has been exposed to or under water Immediately call a qualified service person to arrange for replacement of the unit 18 Do not operate fireplace if any log is broken 19 Do not use a blower insert heat exchang er insert or other accessory not approved for use with this fireplace 20 Provide adequate clearances around air openings UNPACKING The following items are packed inside the firebox Remove before positioning firebox into framing Transition Collar For vent connection Ceramic Log Pack Shrink wrapped on cardboard Three 3 plastic bags containing lava rock pan and ember materials Rear Lo
15. Burners 20 2 www desatech com 108795 01V SAFETY WARNING This productcon tains 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 manualcarefully and completely before trying to assemble op erate 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 AX DANGER Carbon monoxide poisoning may lead to death This fireplace is a vented product This fireplace will not produce any gas leakage into your home if properly installed This fireplace must be properly installed by a qualified service person If this unit is not properly installed by a qualified Service person gas leakage can occur Carbon Monoxide Poisoning Early signs of carbon monoxide poisoning resemble the flu with headaches dizziness or nausea If you have these signs the fireplace may not have been installed properly Get fresh air at once Have fireplace inspected and serviced by a qualified service person Some people are more affected by carbon monoxide than others These include pregnant women people with heart or lung disease or anemia those under the influ ence of alcohol and those at high altitudes Propane LP gas and natural gas are both odorless An odor making agent
16. DESA HEARTH PRODUCTS B VENT DECORATIVE GAS FIREPLACE OWNER S OPERATION AND INSTALLATION MANUAL C US 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 A WARNING If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death FOR YOUR SAFETY Do not store or use gasoline or any other flammable vapors or liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch Do not use any phone in your building Immediately call yourgas supplierfrom aneighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a quali fied installer service agency or the gas supplier INSTALLER Leave this manual with the appliance CONSUMER Retain this manual for future reference For more information visit www desatech com A WARNING Improper installation adjustment al teration service or maintenance can cause injury or property damage Refer to this manual for correct in stallation and operational procedures For assistance or additional information consult a qualified installer service agency or the
17. NG All gas piping and connections must be tested for leaks after the installation is completed Afterensuringthatthe gas valve is on apply a commercial leak detection solution to all con nections and joints If bubbles appear leaks can be detected and corrected Do not use an open flame for leak testing and do not operate any appliance if a leak is detected Flexible Gas Line Gas Shutoff NOT Kink Valve Note 1 Wire Connections 1 2 NPT Not Shown for Clarity Incoming 2 1 8 NPT Plugged Gas Line Tapping Complete your gas installation by connect ing incoming gas line with flexible gas line Secure tightly with wrench but DO NOT OVERTIGHTEN EMBER AND PAN MATERIAL PLACEMENT 1 Open bag s of vermiculite and fill entire burner pan until burner tube is completely covered see Figure 22 2 Smooth pan material just even with edges of burner pan 3 Remove ember material from bag and flatten small amounts into quarter size pieces and lay on top of surface of pan material see Figure 23 4 Place just enough to cover entire surface and leave about a 1 2 gap under lower grate members to allow air to flow see Figure 24 page 15 Red Surface Indicates For Propane LP Use Only Pilot Adj Outlet Pressure Tap Inlet Pressure Tap Figure 21 Connecting Flexible Gas Line to Millivolt Valve Grate Vermiculite Burner Pan Pan Material Figure 22 Fill Entire Bur
18. 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 108795 01V KEY M36 B H M42 B H NO VM36 B H VM42 B H 1 14153 14153 2 11165 11165 3 24353 24353 4 22912 22924 5 106642 01 106642 01 6 106643 01 106643 01 7 106651 01 107805 01 8 20280 20280 9 20090 20090 10 106657 02 107811 02 11 11408 11408 12 See page 28 13 See page 28 14 page 28 15 See page 28 16 See page 28 17 14123 14123 18 114574 106543 01 19 106691 01 107839 01 20 20088 20088 21 106699 01 106699 01 22 106703 01 106703 01 23 20042 20042 24 106948 02 107823 02 25 20027 20027 B 26 107796 01 107796 02 27 107742 01 107742 02 28 107795 01 107831 01 29 107748 01 107748 01 30 107985 01 107985 02 31 901681 01 901681 01 32 11209 11209 33 11147 11147 34 901066 01 901066 01 901066 02 901066 02 35 901064 03 901064 08 901065 13 901065 08 36 108084 01 108084 01 108084 06 108084 06 37 108085 01 108085 01 108085 02 108085 02 38 11102 11102 39 14512 14512 14513 14513 40 107741 01 107741 01 41 14261 14261 42 111288 02 111288 02 43 20023 20023 44 108005 01 108005 01 45 108005 02 108005 02 46 11418 11418 i 47 112105 107840 01 PARTS AVAILABLE NOT SHOWN 901155 01 901155 01 Vermiculite Bag 901156 01 901156 01 Pan Material 901157 01 901157 01 Lava Rock DESC
19. RIPTION Micro Switch Screw 10 x 5 8 Mod Tr Blk Ox Assembly Draft Diverter Air Rod Retainer Damper Rod Retainer Panel Closure Top Spacer _ Spring Clip Air Separator Bushing Left Refractory Right Refractory Rear Refractory Bottom Rear Refractory Bottom Front Refractory Strain Relief Limit Switch Screen Rod Door Stop Transition 6 B Vent Collar Air Kit Door Assembly Air Kit Cover Smoke Deflector Brick Liner Retainer Grate Assembly Burner Pan Burner Tube Burner Bracket Pilot Shield Burner Clamp Nut 10 24 Screw 10 24 x 1 2 Brass Air Mixer NG Brass Air Mixer LP Orifice NG Orifice LP Pilot NG Pilot LP Pilot Orifice NG Pilot Orifice LP i Screw 8 32 x 3 8 Gas Control Valve NG Gas Control Valve LP Valve Bracket Piezo Ignitor Manual Valve w Flex Hose _ Starter Collar Wire Harness Wire Harness Push On Nut Screen www desatech com lo id i i mm mim im im im im im i im md im im im im um im 3 EM 27 PARTS BRICK LINERS FOR MODELS M36 B H M36P B H VM36 B H AND VM36P B H 1 KEY M36 B H NO VM36 B H 12 13 14 15 16 28 106659 01 106660 02 108166 02 106660 01 108166 01 106661 02 108167 02 108168 01 106658 02 108164 02 106658 01 108164 01 106659 02 108165 02 108165 01 106661 01
20. Too Low pilot will not stay lit burner will have delayed ignition fireplace will not produce specified heat propane LP gas supply may be low if using propane LP gas If using propane LP gas you may feel your gas pressure is too low If so contact your local propane LP gas supplier 22 www desatech com Usually we will ask you to return the part to the factory PARTS NOT UNDER WARRANTY Contact authorized dealers of this product If they can t supply original replacement part s call DESA Heating LLC at 1 866 672 6040 for referral information A list of authorized dealers can be found by visiting www desatech com When calling DESA Heating LLC have ready model and serial numbers of your heater the replacement part number TECHNICAL SERVICE You may have further questions about installa tion operation or troubleshooting If so con tact DESA Heating LLC at 1 866 672 6040 When calling please have your model and serial numbers of your heater ready You can also visit DESA Heating LLC s web site at www desatech com 108795 01V 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 REMEDY Pilot will not light 1 2 No gas supply or shutoff valve is
21. blocking the openings ofthe pro pane LP air mixer could cause performance problems Figure 32 Logs Installed for M42 M42P VM42 and VM42P Models www desatech com 108795 01V 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 AX CAUTION Air inlet ducts are not to terminate in attic space Air Kit Handle A Figure 33 Air Kit Handle Location APPLIANCE ENCLOSURE Before finishing enclosure around appliance inspect all joints around outer surround Any gaps between nailing flanges and framing should be sealed with noncombustible insula tion or caulking If appliance is mounted on a raised platform it must be a continuous surface and not on blocks without a solid surface This will prevent the entry of cold air by means of con duction through the total bottom of appliance see Figure 34 INSTALLING OPTIONAL GLASS DOOR ACCESSORY CAUTION Use only glass doors certified for use with this appliance Note Glass door may be heavy for some individuals Please request help if needed The M36 VM36 M42 and VM42 B
22. ce Vent Collar Required air i A spaces are indicated with an Do not X 5 pack with DO NOT BLOCK insulation or K A orosstruct any other O Clearance to OPENINGS E material Combustible or Il Noncombustible Flooring Figure 4 Minimum Clearances Front View 108795 01V MANTEL CLEARANCES AND WALL DETAILS A combustible mantle shelf maybe installed a maximum 12 22 9 cm from the wall Figures 5 and 6 show the minimum allow able distances from various combustible mantle components in relation to fireplace opening 30 Combustible n 12 Materials a 22 9cm m k Header lt Spacer M36 B H M42 B H M36P B H M42P B H VM36 B H VM42 B H VM36P B H VM42P B H A 14 35 6 cm 15 38 cm B 8 20 3 cm 9 22 9 cm Figure 5 Mantel Clearances Side View Lo p Cross Section TOP VIEW Combustible Outer Surround Material May 4 Be Used A AX M 112 4 SAFE 1 3 8 cm A ZONE 3 7 6 cm l 33 6 15 2 cm La A k Perpendicular Wall M36 B H M42 B H M36P B H M42P B H VM36 B H VM42 B H VM36P B H VM42P B H A 9 22 9 cm 6 15 2 cm B 12 30 5 cm 9 22 9 cm Figure 6 Side Clearances Top View Cross Sec
23. d off with the hand held remote control unit IMPORTANT Do not leave selector switch inthe REMOTE or ON position when pilot is not lit This will drain the battery Press control button on hand held remote to turn burner on Press control button again to turn burner off see Figure 41 To Lock press both buttons on remote control until light stops flashing Remote is now locked If the fire is on it will be turned off automatically In the locked state the light will not light up when any button is pressed To Unlock press both buttons together on remote control until light stops flashing The remote is now unlocked Indicator Light Control p Button Figure 41 On Off Hand Held Remote Control Unit HRC100 INSPECTING BURNERS Check pilot flame pattern and burner flame patterns often PILOT ASSEMBLY The pilot assembly is factory preset for the proper flame height Alterations may have occurred during shipping and handling The pilot is located on the back right hand side the burner The height of the thermopile must be 3 8 to 1 2 above the pilot flame The flame from the pilot burner must extend beyond the thermopile 20 www desatech com If your pilot assembly does not meet these requirements Turn adjustment screw marked pilot clock wise to decrease or counterclockwise to in crease the flame to proper size see Figure 39 page 19 Do not remove adjustment Screw see Tr
24. e vent safety switch If theappliance should shut down contact a qualified installer ser vice agency or your gas supplier tohavethe ventinspected before operating Check this area along entire top edge of fireplace opening Smoke or flame should be drawn into appliance opening Figure 12 Checking for Spillage INSTALLATION WALL SWITCH INSTALLATION The installation of a wall switch allows you to activate the gas control valve without normal household electricity since valve operates on millivolt current supplied by heat generated by the thermopile To install wall switch 1 Remove front refractory access panel by lifting up and angling out of firebox open ing see Figure 13 2 Use wire and connectors provided Attach red wire to terminal marked TH TP on control valve Attach white wire to blade connector on open end of safety circuit wiring see Wiring Diagram page 22 Note If any of the original wire from unit con trol must be replaced use the same type or a higher rated wire 25 ft maximum length AX WARNING Do not wire re mote wall switch to main power supply Standard 120v house hold current 108795 01V 3 Locate wall switch in a convenient location 4 After wire connections are complete replace refractory access panel Figure 13 Removing Front Refractory Access Panel www desatech com 11
25. ety of situ ations such as bent line or gas supplier 4 If using propane LP gas no 4 Check propane LP supply propane LP gas in tank and contact local propane LP supplier Fireplace produces a clicking 1 Metal expanding while 1 This is normal with most ticking noise just after burner heating or contracting while fireplaces If noise is ex is lit or shut off cooling cessive contact qualified Service person 24 www desatech com 108795 01V TROUBLESHOOTING Continued building WARNING If you smell gas Shut off gas supply Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your Immediately call your gas supplier from a neighbor s phone Fol low 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 Cleaning supplies paint paint remover cigarette smoke cements and glues new carpet or textiles etc create fumes These fumes may mix with combustion air and create odors OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Fireplace produces unwanted 1 odors Fireplace burning vapors from paint hair spray glues etc See IMPOR TANT statement above For propane LP gas low fuel supply Gas leak See Warning statement at top of page 1 Ventilate room Stop us ing odor causing products while fireplace is
26. flexible gas line remove fitting and replace with a 37 flare 3 4 12 1 2 NPT female fitting WARNING When finishing appliance do not overlap com bustible material onto the black front face Brick tile or other noncombustible materials may be applied to the face provided that any gap is between the material used and the face is These Dimensions Allow for a 3 4 Clearance at Sides and Back of Fireplace However 0 Clearance is Permitted 3 4 Clearance Not Required at Nailing Flanges caulked with a noncombustible M36 B H M42 B H caulking M36P B H M42P B H VM36 B H VM42 B H VM36P B H VM42P B H A 241 2 62 2 27 Me 70 cm B 73 7 amp 187 6 cm 83 7 s 213 cm C 52 3 16 132 6 cm 59 5 se 150 6 cm D 17 4 43 8 cm 19 1 2 49 5 cm Figure 8 Corner Installation Guidelines 8 www desatech com 108795 01V 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 Re move 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 To install B vent piping slide the first piece of B vent over transition
27. g Remove the two plastic quick ties from around the burner and grate Grate Stand Lift off of burner pan Check all items for any shipping damage If damaged promptly inform dealer or distributor where you bought the product Safely retain these items for later installation INTRODUCTION Models M36 P B H VM36 P B H M42 P B H and VM42 P B H are vented gas fireplaces that use a millivolt gas control valve with a millivolt ignition system A 6 B Type venting system and a listed type vent cap are not supplied but are required for proper operation See venting instructions on pages 9 and 10 AX WARNING This gas appli ance must not be connected to a chimney flue servicing a solid fuel burning appliance BEFORE YOU BEGIN Before beginning the installation of your appliance read these instructions through completely 4 www desatech com This DESA Heating LLC appliance and its approved components are safe when installed according to this installation manual and are operated as recommended by DESA Heating LLC Unless you use DESA Heating LLC ap proved components tested for this appliance YOU MAY CAUSE A FIRE HAZARD The DESA Heating LLC warranty will be voided by and DESA Heating LLC disclaims any responsibility for the following actions A Modification of the appliance or any of the components B Use of any component part not approved by DESA Heating LLC in combination with this applia
28. gas line be routed from the gas source through a sediment trap see Figure 20 and into appliance Once connected through ap pliance a flexible gas line may be used for ease of installation to gas control valve see Figure 21 page 14 Before connecting black iron gas line to inside of appliance a sediment trap must be included outside appliance between gas line and gas shutoff valve It must extend down 3 beyond center of pipe Prepare incoming black iron gas line with teflon tape or pipe joint com pound Check with local building codes Shutoff Valve Typical Exterior Wall Gas Shutoff Installation Figure 18 Manual Shutoff Valve Installation 1 2 NPT Incoming Black Iron Gas Line can A y i T 7 Alternate Gas Supply Through Sub Floor M36 B H M42 B H M36P B H M42P B H VM36 B H VM42 B H VM36P B H VM42P B H 8 5 8 21 9 10 12 26 7 cm Figure 19 Routing Incoming Gas Line Incoming 1 2 Gas Line Permitted by Local Codes Sediment Trap Not Supplied Figure 20 Sediment Trap www desatech com 13 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 WARNI
29. hnician to inspect the appliance and to replace any part of the control system and any gas control which has been under water LIGHTING INSTRUCTIONS NOTICE During initial operation of new heater burning logs will give off a paper burning smell Orange flame will also be pres ent Open damper or window to vent smell This will only last a few hours 108795 01V il RON 10 11 12 13 STOP Read the safety information col umn 1 Turn wall switch to the OFF position Turn off all electric power to appliance Fully open glass doors if installed Remove front refractory brick access panel Turn gas control knob clockwise Z N to the OFF position see Figure 39 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information column 1 If you don t smell gas go to the next step Turn control knob counterclockwise K Ntothe PILOT position Push in knob all the way and hold in Immediately light the pilot manually Con tinue to hold control knob in for about one minute after pilot is lit Release knob and it will pop back up Pilot should remain lit If it goes out repeat steps 5 through 9 If knob does not pop up when released stop and immediately call your service technician or gas supplier If the pilot will not stay lit after several tries turn the gas control knob to OFF and
30. irst purchase Factory Reconditioned Products Limited Warranty DESA Heating LLC warrants factory reconditioned products and any parts thereof to be free from defects in material and workmanship for 30 days from the date of first purchase from an authorized dealer provided the product has been installed maintained and operated in accordance with DESA Heating LLC s warnings and instructions Terms Common to All Warranties The following terms apply to all of the above warranties Always specify model number and serial number when contacting the manufacturer To make a claim under this warranty the bill of sale or other proof of purchase must be presented This warranty is extended only to the original retail purchaser when purchased from an authorized dealer and only when installed by a qualified installer in accordance with all local codes and instructions furnished with this product This warranty covers the cost of part s required to restore this product to proper operating condition and an allowance for labor when provided by a DESA Heating LLC Authorized Service Center or a provider approved by DESA Heating LLC Warranty parts must be obtained through authorized dealers of this prod uct and or DESA Heating LLC who will provide original factory replacement parts Failure to use original factory replacement parts voids this warranty Travel handling transportation diagnostic material labor and incidental costs associated with warra
31. lava rock inside burner pan or blocking openings of the propane LP air mixer could cause performance problems Log 3 Notches Figure 28 Logs Installed for M36 M36P VM36 and VM36P Models www desatech com 15 1 INSTALLATION Continued LOG PLACEMENT FOR M42 M42P VM42 AND VM42P MODELS Place large back log log 1 onto grate making sure notches rest over grate see Figure 29 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 Place log 3 into notch on top left of log 1 resting lower end on left two grate fingers see Figure 30 Place upper end of log 4 into notch on log 1 as shown in Figure 30 Rest lower end of log 4 on middle grate finger as shown in Figure 31 Notch Notches Figure 30 Installing Logs 3 and 4 5 Place upper end of log 5 into notch on top inner right of log 1 see Figure 31 Rest lower end of log 5 on middle grate finger as shown in Figure 32 6 Place log 6 into notch on top right of log 1 see Figure 31 Rest lower end of log 6 on top of log 2B see Figure 32 As an option to enhance the look of the hearth you may place the lava rock provided around front and sides of burner pan NOTICE Do not put lava rock inside the burner pan or around the air mixer fitting Placing lava rock inside the burner pan or
32. low the 75 rule for lateral to total vertical system height Codes also allow only one offset in the total system when at 108795 01V 60 or greater The total vertical height in this example represents the minimum height of 8 feet and therefore the allowable lateral is 6 feet when the 75 rule applies If the lateral length must exceed 75 then the system must be sized in accordance with Category venting tables Example 2 Shows a multiple offset each at 45 of inclination Multiple offsets are permit ted ifthey do not exceed 45 of inclination The total lengths of the two offsets are not required to meet the 75 allowable rule Example 3 Shows a single offset at 45 of inclination and therefore the lateral length at 10 feet of offset does not have to meet the 75 rule In each case the offsets must be supported and firestops must be positioned wherever the vent must pass through a sub floor ceil ing joist or an attic overhang The vent pipe must terminate vertically into a listed type vent cap and extend a sufficient height through an approved roof flashing roof jack or a roof thimble At all points listed clearances must be maintained Vent terminations must be located in ac cordance with height and proximity rules of NFPA No 54 These rules apply to vents at 12 diameter or less and require a minimum height in accordance with the roof pitch and a minimum of 8 ft distance from a vertical wall or obstruction see Figure
33. ment two pressure taps for IN and OUT pressures are provided on the gas control valve for test gauge connections to the appliance SELECTING LOCATION To determine the safest and most efficient location for your appliance you must take into consideration the following guidelines 1 The location must allow for proper clear ances see Clearances page 7 2 Consider a location where heat output would not be affected by drafts air con ditioning ducts windows or doors 3 Alocation that avoids the cutting of joists or roof rafters will make installation easier Figure 1 shows a plan view of a few com mon locations CORNER INTERNAL WALL INSTALLATION INSTALLATION EI T FLUSH INSTALLATION FULL PROJECTION INSTALLATION Figure 1 Possible Locations for Installing Appliance 108795 01V Flush installations are recommended where living space is limited or at a premium and since the space required to enclose the ap pliance would be located beyond an outside wall this would also reduce the cutting of joists roof rafters and such Check local codes for any restrictions Projected installations can extend any distance into the room A projection may be ideal for a new addition on an existing finished wall Corner installations make use of space that may not normally be used and provides a wider and more efficient range for
34. nce C Installation and or operation in a manner other than instructed in this manual D Burning of anything other than the type of gas approved for use in this gas appliance 108795 01V INTRODUCTION Continued The installation must conform with local codes or in the absence of local codes with the cur rent National Fuel Gas Code ANSI Z223 1 NFPA 54 This appliance complies with ANSI Z21 50 CSA 2 22 AX WARNING Installation of this appliance should be done by a qualified service person well trained in the installation of such appliances You will also needa building permit from your local Building and Safety Commissioner before installing this appliance otherwise your insurance co may notcoverthis appliance NOTICE This appliance is not intended to be used as a primary source of heat CAUTION Do not connect appliance before pressure test ing gas piping Damage to gas valve may result and an unsafe condition may be caused The appliance and it s individual shutoff valve must be disconnected from gas supply piping System during any pressure testing of that System at test pressures in excess of 1 2 psig 3 5 kPa The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing ofthe gas supply piping system attest pressures equal to or less than 1 2 psig 3 5 kPa For the purpose of input adjust
35. ner Pan with Vermiculite 14 www desatech com vind Vermiculite Pan Material Burner Pan Grate Figure 23 Ember Material on Surface of Pan Material Vermiculite 108795 01V INSTALLATION Continued Grate Pan and Ember a 0 5 Material pce fa gwo ei 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 Place upper end of log 4 into notch on log 2 as shown in Figure 26 Rest lower end oflog 4 onto middle grate finger as shown in Figure 27 5 Place upper end of log 5 into notch on left of log 2 see Figure 27 Rest lower end of log 5 on grate as shown in Figure 28 6 Insert lower end of log 6 between first two grate fingers as shown in Figure 28 and position upper end of log 6 into notched area on front of log 2 as shown in Figure 28 As an option to enhance the look of the hearth you may place the lava rock provided around front and sides of burner Figure 25 Installing Logs 1 and 2 108795 01V NOTICE Do not putlava rock in side burner pan oraroundthe air mixer fitting Placing
36. nty repairs unless expressly covered by this warranty are not reimbursable under this warranty and are the responsibility of the owner Excluded from this warranty are products or parts that fail or become damaged due to misuse accidents improper installation lack of proper maintenance tampering or alteration s This is DESA Heating LLC s exclusive warranty and to the full extent allowed by law this express warranty excludes any and all other warranties express or implied written or verbal and limits the duration of any and all implied warranties including warranties of merchantability and fitness for a particular purpose to four 4 years on new products and 30 days on factory reconditioned products from the date of first purchase DESA Heating LLC makes no other warranties regarding this product DESA Heating LLC s liability is limited to the purchase price of the product and DESA Heating LLC shall not be liable for any other damages whatsoever under any circumstances including indirect incidental or consequential damages Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state For information about this warranty contact DESA DESA Heating LLC 2701 Industrial Drive
37. odel 36 Model 42 Model 36 Model 42 A 29 36 401 44 1 4 Q 13 7 8 14 5 8 5 8 J 21 24 R 101 2 12 1 2 C 41 48 K 8 9 S 21 2 21 D 12 14 L 34 42 T 81 8 1 211 4 23 M 42 49 U 11 12 3 4 22 1 4 24 w o Brick 29 1 4 31 w o Brick N 36 40 Mier Te G 32 s 34 w o Brick 39 1 2 41 1 4 w o Brick O 37 41 W 214 2 15 3 16 3 4 w o Brick 17 3 4 18 3 4 w o Brick 8 10 2e X 5 1 2 Figure 2 Appliance Dimensions 6 www desatech com 108795 01V 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 insu lation or any other material Do not obstruct effective opening of appliance with any type of facing material 2 x 4 Stud Left Side Surround Front Face Drywall Figure 3 Minimum Clearances Top View 1 2 5 cm Min Clearance to B Vent s Outer Pipe Ceiling we Maintain 2 5 1 cm 42 106 7 cm e Min eran aston Pea from Opening t Celing s Measured at Outer 0 Clearan
38. ote 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 even ly joined spaced and working freely CAUTION The glass pan els become very hot while the appliance is operating Do not attempt to adjust or clean the glass doors until the appliance has fully cooled The doors may be removed for replacement or cleaning as follows 1 Partially open door and press up on upper spring clip with a screw driver until outer top pivot pin is free of clip 2 Fully fold frame assembly and slide upper edge towards center of firebox opening until guide pins are free of frame rail see Figure 37 CAUTION Always operate the appliance with the doors ei therfully opened orfully closed Operating the appliance with the doors partially open can re sult in improper venting of flue products 18 www desatech com Hold Down Screw Spring Clip Side Front Face Partially Opened Door Figure 36 Adjusting Glass Doors Cvm I I I Spring Clip Fold Bi Fold Door After Releasing Spring Clip and Slide Door Out of Press Upper Track Spring Clip to Release Pivot Pin Remove Bottom Pin From Pivot Plate While Sliding Door Out of the Upper Track Figure 37 Removing Glass Doors OPENING VENT DAMPER Vent damper must be locked in the full open position before o
39. oubleshooting page 23 108795 01V INSPECTING BURNERS Continued Thermopile Figure 43 shows a typical flame pattern If Pilot burner flame pattern differs from that de Burner scribed 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 float ing Flames should go up through the middle of logset Flames should not spill to edges of pan or sides of logset CLEANING AND MAINTENANCE Figure 43 Typical Flame Pattern Ay WARNING Installation and 4 WARNING Failure to keep repair should be done by a quali fied service person The appli anceshould be inspected before each use and at least annually by a qualified service person More frequent cleaning may be required due to excessive lint from carpeting bedding mate rial pet hair etc It is imperative that the control compartments burners and circulating air sys tem be kept clean the primary air opening s of the burner s clean may result in sooting and property damage AX WARNING The logs can be hot Handle only when cool AX WARNING Turn off gas and electrical power before servicing appliance PILOT AND BURNER Remove logs and ember material before cleaning burner and replace when cleaning is complete Burner and controls should be cleaned
40. perating fireplace If vent damper is not open fireplace will not light Pivot Plate VENT DAMPER MUST BE LOCKED IN THE FULL OPEN POSITION TO OPERATE THE APPLIANCE OPEN CLOSE I TI Figure 38 Opening Vent Damper 108795 01V OPERATION E FOR YOUR SAFETY READ BEFORE LIGHTING 4k WARNING If you do not fol low these instructions exactly a fire or explosion may result causing property damage per sonal 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 WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electric 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 C Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand don t try to repair it call a quali fied service technician or gas supplier Force or attempted repair may result in a fire or explosion D Do not use this appliance if any part has been under water Immediately call a qualified service tec
41. radiant heat transference Internal wall installations provide a discreet option for room separation and can also be ideal as an addition to an existing wall www desatech com 5 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 49 kPa Minimum Supply Pressure 11 WC 2 74 kPa 11 WC 2 74 kPa Maximum Supply Pressure 13 WC 3 23 kPa 13 WC 3 23 kPa Orifice Size 52 51 For Use With a F 6 Type B 1 7 Vent Pipe Only HEARTH AREA fo DIMENSIONS H Stand Off 7 o Collar N 7 G Td Alternate Gas Supply Inlet HII x Gil ssD or 15 J Optional 13 5 Pd Outside Air LA Kit Location Optional N m R LL Se Epi Li L Pi L av L a 8 M Model 36 Model 42 M
42. running 2 Contact local propane LP supplier 3 Locate and correct all leaks see Gas Line Hook Up page 13 Gas odor even when control knob is in OFF position 1 Gas leak See Warning statement at top of page Control valve defective 1 Locate and correct all leaks see Gas Line Hook Up page 13 2 Replace control valve Gas odor during combustion 1 Foreign matter between control valve and burner Gas leak See Warning statement at top of page 1 Take apart gas tubing and remove foreign matter 2 Locate and correct all leaks see Gas Line Hook Up page 13 Dark residue on logs or inside of fireplace 108795 01V 1 Improper log placement 2 Air holes at burner inlet blocked Burner flame holes blocked Improper venting or exces sive blockage Excessive amounts of em bers and pan material www desatech com 1 Properly locate logs 2 Clean out air holes at burn er inlets Periodically repeat as needed 3 Remove blockage or re place burner 4 Have vent system inspect ed including termination cap Remove any restric tions or obstruction 5 Clear excess embers until a minimum gap of 1 2 remains under the grate 25 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 26 www desatech com 108795 01V
43. s away from hot surfaces to avoid burns or clothing igni tion Fireplace will remain hot for a time after shutdown Allow surfaces to cool before touching Carefully supervise young children when they are in the room with fireplace hearth extension is not required with this appliance If one is installed it is for aes thetic purposes only and does not have to meet the standard requirements Turn fireplace off and let cool before ser vicing or repairing Only a qualified service person should install service or repair this fireplace Have fireplace inspected annually by a qualified service person You must keep control compartments burners and circulating air passages clean More frequent cleaning may be needed due to excessive lint and dust from carpeting bedding material etc Turn offthe gas valve and pilot light before cleaning fireplace Have venting system inspected annually by a qualified service person If needed have venting system cleaned or repaired See Cleaning and Maintenance page 21 108795 01V www desatech com 3 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
44. t pilot outage 108795 01V 1 Pilot flame may be too low causing safety pilot to drop out Improper venting or exces sive blockage www desatech com Clean and adjust pilot flame for maximum flame im pingement on thermopile Have vent system inspect ed including termination cap Remove any restric tion or obstruction 23 TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Pilot goes outwhen wallswitch 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 If electrode at pilot spark at pilot lights turn off pilot and electrode trigger the red button again If pilot lights an improper gas air mixture caused the improper lighting and a longer purge period is rec ommended If pilot will not light check gap at electrode and pilot Gap should be 1 8 to have a strong spark If okay replace pilot 3 No gas or low gas pres 3 A Check remote shut off sure valves from fireplace Usu ally there is a valve near the fireplace and sometimes there is a valve near the main There can be more than one valve between fireplace and main B Low pressure can be caused by a vari
45. tion www desatech com T PRE INSTALLATION PREPARATION Continued FRAMING 11 Frame appliance enclosure as illustrated in Figures 7 and 8 Note If a wall covering is used to line the through the lower left side access point or A 40 3 102 cm 44 e 112 cm alternate access hole in the bottom of the B 213 54 3 cm 23 1 58 7 cm appliance see Figure 19 page 13 C 41 17 104 8 cm 48 1 4 122 6 cm Repack insulation around the gas line to cover any remaining openings in the con duit sleeve Prepare the incoming gas line enclosure then all measurements must I I ii be from the surface of the covering NI 2 Place the appliance into the framing and __ IL Loll A secure it H B H Note If appliance is to be raised above s Bee Ti floor level a platform must be built to Lo support the appliance 3 Install the supply line to the appliance M36 B H M42 B H using a 1 2 NPT black iron gas line ter M36P B H M42P B H minating 2 5 1 above the bottom of the VM36 B H VM42 B H appliance The gas line must be installed VM36P B H VM42P B H Figure 7 Rough Opening for Installing in Wall with teflon tape or pipe joint compound and hook up incoming gas line to the flexible gas line Note If 1 2 NPT black iron pipe does not mate with fitting at the end of
46. vent fireplaces are approved for use with optional bi fold glass doors see Accessories page 31 Glass panels may be ordered and in stalled anytime after fireplace installation is complete Follow these steps to install left and right panels 1 With handle atthe bottom completely fold panel on its hinges 2 With handle facing center of firebox open ing insert lower pivot pin on glass door panel into hole in pivot plate on bottom edge of fireplace opening see Figure 35 3 Keeping folded door tilted slide upper two pins into guide track found under upper facial edge of firebox opening 4 Tiltglass assembly fully vertical until outer pivot pin snaps into mounting hole in up per spring clip see Figure 35 5 Once top and bottom pins are secured unfold door into the closed position Insert Pin Into Spring Clip Spring Clip Slide Top Pin Into Door Track Insert Bottom Pivot Pin Into Pivot Plate and Swing Door Side Side Into Vertical Position Framing Framing Caulk Here Pack Insulation Pivot Plate Figure 34 Sealing Between Appliance Figure 35 Installing Optional Glass and Framing Door 108795 01V www desatech com 17 INSTALLATION Continued 6 Repeatthe process for the opposite door assembly 7T Toadjust 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 n
47. with compressed air to remove dust dirt or lint Use a vacuum cleaner or small soft bristled brush to remove excess dust dirt or lint LOGS f you remove logs for cleaning refer to log placement information on page 12 to properly replace logs Use a vacuum cleaner to remove any carbon buildup on logs Replace log s if broken See Replacement Parts page 22 108795 01V Replace ember material periodically as needed See Replacement Parts page 22 www desatech com 21 WIRING DIAGRAM PILOT BURNER IGNITOR THERMOPILE REPLACE FACTORY WIRING WITH 105 C EQUIVALENT OR HIGHER RATING EXTERNAL WIRING USE ONLY CLASS 2 THERMOSTAT WIRE 18 GA RED WHITE PILOT GAS E DO NOT CONNECT TO 120V N O SW N C SW X m W MANUAL SWITCH MAN GAS VENTSAFETY SUPPLY E SHUTOFF SWITCH lt PILOT SAFETY WIRE 4 WALL SWITCH NOT SUPPLIED REPLACEMENT PARTS 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 Heating LLC at 1 866 672 6040 When calling DESA Heating LLC have ready your name your address model and serial numbers of your heater how heater was malfunctioning purchase date SERVICE HINTS When Gas Pressure Is
48. y 9 Z 277 LY 22 LY N AZ 79 EYE ATED So V gt KEY PART NO NUMBER DESCRIPTION QTY 107999 01 Log Set 108724 01 Right Front 9 Split Log 901098 01 Rear Log 1108720 01 Top Right Log 11 a 108721 01 Top Right Log 16 108722 01 Left Log 13 1 2 Y Log 108723 01 Top Left Log 11 O OQ Q N a oo 59 59 108795 01V www desatech com 29 LOGSETS FOR MODELS PARTS M42 B H M42P B H VM42 B H AND VM42P B H KEY PART NO NUMBER 107999 02 1 1901098 02 2A 108723 01 2B 108839 01 3 108722 01 4 1108838 01 5 108721 01 6 108720 01 30 ZIN Z lt 73 LL P YA z s SA 7 1 22 ZZ DESCRIPTION Log Set Rear Log Left Front Log 11 Right Front Log 15 2 4 Round Top Left Log 13 2 Y Log Inside Top Left Log 15 3 4 Split Inside Top Right Log 16 Top Right Log 11 3 4 www desatech com QTY ES B Be 108795 01V 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 Optional kit helps offset the negative pressure often existing in today s tightly constructed homes REMOTE CONTROL
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