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DIRECT-VENT FIREPLACE

®

OWNER’S OPERATION AND INSTALLATION MANUAL

MBDV37 AND MBDV41

Save this manual for future reference.

This appliance may be installed as an OEM installation in a manufactured (mobile) home and must
be installed in accordance with the manufacturer's instructions and the Manufactured Home
Construction and Safety Standard, 

Title 24 CFR, Part 3280 in the United States or the Mobile Home

Standard, 

CAN/CSA Z240 MH Series, in Canada.

This appliance is only for use with the type of gas indicated on the rating plate. A conversion kit is
supplied with the appliance.

FOR YOUR SAFETY

— Do not store or use gasoline or other flammable

vapors and 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 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.

— Installation and service must be performed by a

qualified installer, service agency, or the gas
supplier.

WARNING: Improper installation,
adjustment, alteration, service, or
maintenance to this appliance can
cause injury or property damage.
Refer to this manual. For assistance
or additional information consult a
qualified installer, service agency,
or the gas supplier.

WARNING: If the information in
these instructions is not followed
exactly, a fire or explosion may re-
sult causing property damage, per-
sonal injury, or loss of life.

WARNING: This direct-vent gas fire-
place series is intended for use with
Natural or Propane/LP gas only. Do
not attempt to burn any solid fuels
in these appliances.

This fireplace meets
the construction and

safety standards of

H.U.D. for application

in mobile homes when

installed according to

these instructions.

This appliance is

shipped ready for natural

gas installation. The

propane/LP conversion

parts are included.

CHECK LOCAL CODES PRIOR TO INSTALLATION

Summary of Contents for MBDV37

Page 1: ...hbor 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 qualified installer service agency or...

Page 2: ...bjects 14 Do not use any solid fuels wood coal paper cardboard etc in this fireplace Use only the gas type indicated on fire place nameplate 15 This appliance when installed must be electrically groun...

Page 3: ...ncy backup heat PIEZO IGNITOR This fireplace has a piezo ignitor This sys tem requires no matches batteries or other sources to light fireplace Figure 1 Direct Vent Fireplace Glass Door Assembly Blowe...

Page 4: ...e to combustibles 37 1 2 41 1 2 34 3 4 36 3 4 20 Vertical Termination 19 Horizontal Termination Note Where two numbers are given the top number is exclusive to the 37 Fireplace and the bottom number i...

Page 5: ...using the following guidelines Only use Vanguard or Simpson Dura Vent GS venting components or kits spe cifically approved for this fireplace Minimum clearance between vent pipes and combustible mater...

Page 6: ...or a paved driveway located on public property 84 inches 2133mm minimum M clearance under veranda porch deck 12 inches 305mm minimum N clearance above a roof shall extend a minimum of 24 inches 610mm...

Page 7: ...are two basic types of direct vent installation Horizontal Termination Vertical Termination It is important to select the proper length of vent pipe for the type of termination you choose It is also i...

Page 8: ...all local building codes Note Wheninstallinginachase youshould insulate the chase as you would the outside walls of your home This is especially im portant in cold climates Minimum clear ance between...

Page 9: ...wall with the arrow on the vent cap pointing up Insure proper clearance of 1 to combustibles is maintained At tach the vent cap with four wood screws supplied see Figure 13 Note Re place the wood scr...

Page 10: ...llation UP Horizontal Venting See information in Figure 17 for Vertical V and Horizontal H maximums and minimums The same amounts apply for flexible venting Note Figure 16 applies to rigid venting onl...

Page 11: ...max 8 min 8 min 20 max 20 max 8 max 20 max Venting with Two 90 Elbows Vertical V Horizontal H1 Horizontal H2 5 min 6 max 6 min 12 max 7 min 18 max 8 min 20 max 20 max 20 max Figure 19 Horizontal Termi...

Page 12: ...obstruct the venting system consider an offset see Figure 21 to avoid cutting loadbearing members Note Pay spe cial attention to these installation in structions for required clearances air space to c...

Page 13: ...using a level Temporarily tack the support box in place through the inside walls and into the roof sheathing 4 Using tin snips cut the supportbox from the top corners down to the roofline and fold th...

Page 14: ...ION Continued Venting with Two 90 Elbows Vertical V1 Horizontal H 5 min 6 max 6 min 12 max 7 min 18 max 8 min 20 max Note Vertical V1 Vertical V2 20 max Figure 27 Vertical Rigid Venting Configuration...

Page 15: ...izontal Termination RTV Silicone and 20 Screws CVK Corner Vent Kit Includes 7 x 30 Elbow 7 x 90 Elbow 7 AdjustableGalva nized Pipe 7 12 6 Pipe Wall Thimble Horizontal Termina tion RTVSiliconeand20Scre...

Page 16: ...lace IMPORTANT Make sure fireplace is level before securing If fireplace is not level it will not work properly SIMPSON DURA VENT GS 4 x 6 5 8 Number Description Available from DESA International SD20...

Page 17: ...und wire is tight 4 Remove screws securing the plate con taining the ON OFF switch to the bot tom of the firebox and set aside 5 Place speed control against back of this plate and push the plastic con...

Page 18: ...STALLATION Continued Figure 36 Installing Remote Receiver Shown from Rear of Mounting Bracket Figure 37 Installing Battery in Receiver Battery Clip 9 Volt Battery Receiver Terminal Wires Receiver Moun...

Page 19: ...the external regulator between the heater and propane LP supply CAUTION Usepipejointseal ant that is resistant to liquid pe troleum LP gas Figure 39 External Regulator with Vent Pointing Down Propane...

Page 20: ...knockout hole on firebox bottom 3 Attach a 45 flare union gas connector to flexible gas line from gas supply see Figure 41 Connect flare union to flex ible gas line attached to gas regulator of firep...

Page 21: ...pen propane LPsupply tank valve for propane LPfireplace or main gas valve located on or near gas meter for natu ral gas fireplace 3 Make sure control knob of fireplace is in the OFF position 4 Check a...

Page 22: ...ews from the three tabs at the top of the glass door while hold ing door securely keeping it from fall ing forward 3 Grasp door by both sides and ease it upward off of the lower bracket see Figure 47...

Page 23: ...gure 48 4 Slide the left retainer bracket against the left side brick panel Loosely se cure the bracket screw This secures the left side brick panel 5 Install the right brick panel using the same meth...

Page 24: ...plied with fireplace Removeglassdoor SeeRemoving Replacing GlassDoor page22 Installlogsaccordingto instructions for fireplace model numbers Fireplace Models MBDV37 and MBDV41 1 Place log 1 back log on...

Page 25: ...re move the broken glass door Dis card safely A glass door kit can be ordered through your local distributor Do not substitute other material for the glass WARNING Children and adults should be alerte...

Page 26: ...ing for lighting 7 Turn gas control knob counterclock wise to PILOT 8 Push in gas control knob all the way and hold Immediately light the pi lot by repeatedly depressing the piezo spark ignitor until...

Page 27: ...ATING BLOWER Locate the blower controls by opening the lower louver panel on the fireplace Blower controls are located on the left side of the switch bracket to the left just inside the louver panel T...

Page 28: ...Inspect joints to verify that no pipe sec tion or fitting has been disturbed and loosened Check mechanical supports such as wall straps for rigidity WARNING Turn off fireplace and let cool before cle...

Page 29: ...S FOR CONVERSION NATURAL TO PROPANE LP BURNER AIR SHUTTER ADJUSTMENT MAIN BURNER ORIFICE AND PILOT ORIFICE CONVERSION 1 Remove the upper louver panel and glass door see Removing Replacing Glass Door p...

Page 30: ...on nut Main Burner Orifice 18mm Hex Brass Elbow Apply Thread Sealant Here Only Figure 62 Removing Replacing Main Burner Orifice Thermopile Pilot Burner Thermocouple Piezo Ignitor 12mm Hex Pilot Orific...

Page 31: ...n loose at con trol valve 6 Thermocouple damaged 7 Control valve damaged REMEDY 1 Reconnect ignitor cable 2 Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry 3 Tighten nut ho...

Page 32: ...defective REMEDY 1 Check to see if you have gas supply 2 Hold control valve in the PILOT position for2to3minutestopurgeair Ifyousmell gasstopandwaitforafewminutesbefore trying to light the fireplace...

Page 33: ...P or natural gas company 2 Clean burner see Cleaning and Maintenance page 28 or replace burner orifice 1 Adjust the log set so that the flame does not excessively impinge on it 2 Inspect the opening a...

Page 34: ...Air holes at burner inlet blocked 3 Burner flame holes blocked OBSERVED PROBLEM Fireplace produces unwanted odors Fireplace shuts off in use Gas odor even when control knob is in OFF position Gas odo...

Page 35: ...supply original replacement part s call DESA International s Techni cal Service Department at 1 800 DESA LOG 1 800 337 2564 WhencallingDESAInternational haveready your name your address modelandserial...

Page 36: ...6 7 7 8 9 10 11 Included in Hardware Pack 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 28 29 30 31 32 33 42 34 2 34 4 34 1 34 5 35 36 35 37 38 5 5 5 50 51 39 45 46 35 47 48 49 44 6 41 40 43 6 5...

Page 37: ...7 Natural 1 104506 03 Orifice 41 Natural 1 27 104507 01 Brass Elbow 1 28 104508 01 Brass Fitting 2 29 104509 01 Aluminum Tubing Assy 1 30 104510 01 Pilot Tubing Assy 1 31 101628 04 Flexible Connector...

Page 38: ...magnetic backing which makes installation and removal quick and easy They are designed to go at the top and bottom of the glass door on BDV units Note Remove the plastic film covering on strips befor...

Page 39: ...___________________ _______________________________________________________________________________________________ ____________________________________________________________________________________...

Page 40: ...sts related to repairing a defective heater will be the responsibility of the owner TOTHEFULLEXTENTALLOWEDBYTHELAWOFTHEJURISDICTIONTHATGOVERNSTHESALEOFTHEPRODUCT THISEXPRESS WARRANTYEXCLUDESANYANDALLO...

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