Vanguard MBDV37 Owner'S Operation And Installation Manual Download Page 30

30

106497

DIRECT-VENT FIREPLACE

®

FINAL PREPARATION

1.

Replace logs and embers (see Remov-
ing/Replacing Glass Door
, page 22).

2.

Reinstall glass door and upper louver panel
on fireplace (see Installing Logs, Lava
Rock and Glowing Embers
, page 24).

The conversion is now complete.

Refer to the section on Checking Gas Con-
nections
 (pages 20 and 21) and Operating
Fireplace
 (pages 26 and 27).

 WARNING: Test all gas pip-

ing and connections for leaks
after installing or servicing. Cor-
rect leaks at once.

 WARNING: Never use an open

flame to check for a leak. Apply
commercial leak test solution to all
gas joints. Bubbles forming show
a leak. Correct all leaks at once.

7.

Remove the burner by loosening the
two 5/16" hex mounting screws (see
Figure 62). Lift burner up and out.

8.

Convert the pilot burner by changing out
the pilot orifice. Remove the compres-
sion nut and compression sleeve from
the pilot. Remove the pilot orifice from
inside the pilot barrel (see Figure 63).
Replace with the pilot orifice supplied
with the fireplace. 

Note:

 The new pilot

orifice has the number 30 stamped on it
for identification purposes.

9.

Place open end of pilot orifice on top of
compression sleeve and carefully slide
up inside pilot burner. Tighten compres-
sion nut (see Figure 63). 

IMPORTANT:

Be careful not to bend or kink alumi-
num tubing during conversion. Make
sure the compression sleeve and pilot
orifice are properly mated and aligned
before retightening the compression 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 Orifice

Compression
Sleeve

Compression Nut
(10mm Hex)

Figure 63 - Removing/Replacing Pilot
Orifice

GAS CONTROL VALVE
CONVERSION

The SIT Nova millivolt valve converts from
natural gas to propane/LP gas with the re-
versal of the conversion screw located on
the stem in the top of the valve (see Figure
64). The valve is located in the bottom of the
fireplace underneath the firebox.

Remove the conversion screw from the valve
and rotate the screw 180 degrees. The screw
is clearly marked as NG or LPG, insure that
the  LPG is facing outward. Tighten the
screw fully but do not over tighten.

ON

T

O

I

P

L

OFF

Figure 64 - Valve

Stem

Conversion
Screw

Top

SIT Nova
Millivolt Valve

10. Adjust air shutter setting on main

burner. Loosen air shutter screw and
rotate air shutter to FULLY OPEN po-
sition (see Figure 61, page 29). Tighten
shutter screw. Place burner back into
position. Attach with the two 5/16" hex
mounting screws removed in step 5.

11. Attach main burner orifice and brass

elbow assembly to burner. Place main
burner orifice into threaded end of
burner and turn clockwise to tighten
(see Figure 61, page 29). Align the brass
elbow with the flare fitting on the alu-
minum tubing.

12. Reconnect the aluminum tube flare fit-

ting onto the brass elbow (see Figure 61,
page 29).

13. Reapply RTV silicone to seal area where

orifice passes through the bottom com-
bustion chamber (see Figure 61, page 29).

INSTALLATION
INSTRUCTIONS
FOR CONVERSION
NATURAL TO
PROPANE/LP

Continued

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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