Vanguard Managed Solutions MBDV37 - Manual (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