HEARTH PRODUCTS
KITS AND ACCESSORIES
775,239M
Rev. A, 08/2008
INSTALLATION INSTRUCTIONS FOR CONVERTING FROM PROPANE GAS (LP) TO
NATURAL GAS (NG). FOR USE WITH THE DESIGNER™ DIRECT VENT GAS FIREPLACE INSERTS
KIT CONTENTS (See Figure 1):
1 ea. Robertshaw NG Regulator Kit (A)
1 ea. #37 NG main burner orifice (30,000 BTU’s) (B)
1 ea. Nova SIT NG pilot orifice (C)
1 ea. Instruction Sheet
DESIGNER™ GAS CONVERSION INSTRUCTIONS LP TO NG
CAT. NO. H5428, MODEL DBV-CK-LP TO NG
AVERTISSEMENT
Cet équipement de conversion sera installé par une
agence qualifiée de service conformément aux instructions du fabricant et toutes exigences et codes applica-
TOOLS NEEDED (See Figure 2):
bles de l'autorisés avoir la juridiction. Si l'information
dans cette instruction n'est pas suivie exactement, un
5/32” Allen Wrench Or T-Handle Wrench
#2 Phillips Screwdriver
1/2” Open End Wrench
feu, explosion ou production de protoxyde de carbone
peut résulter le dommages causer de propriété, perte
ou blessure personnelle de vie. L'agence qualifiée de
service est esponsable de l'installation propre de cet
Figure 1 - Kit Contents
équipment. L'installation n'est pas propre et compléte
jusqu'à l'opération de l'appareil converti est chéque
suivant les critères établis dans les instructions de
B
A
propriétaire provisionnées avec l'équipement.
C
Figure 2 - Tools Needed
Fig. 2
WARNING
This conversion kit shall be installed by a qualified
service agency in accordance with the manufacturer's
instructions and all applicable codes and requirements
of the authority having jurisdiction. If the information
in these instructions is not followed exactly, a fire,
explosion or production of carbon monoxide may result
causing property damage, personal injury or loss of
life. The qualified service agency performing this
installation is responsible for the proper installation of
this kit and assumes responsibility for this conversion.
The installation is not proper and complete until the
operation of the converted appliance is checked as
specified in the manufacturers instructions supplied
with the kit.
IMPORTANT CANADA
The conversion shall be carried out in accordance with
the requirements of the provincial authorities having
jurisdiction and in accordance with the requirements
of the CAN/CSA B149.1 Installation code.
IMPORTANT LE CANADA SEULEMENT
La conversion devra être effectuée conformément
aux recommandations des autorités provinciales
ayant juridiction et conformément aux exigences
du code d'installation CAN/CSA B149.1 .
IMPORTANT
The burner orifices provided in this kit are only for
use at elevations of 0 to 2,000 feet (610 M) in the
USA and 0 to 4,500 feet (0-1372 M) in Canada. At
higher elevations the BTU input must be de-rated
by 4% for every 1,000 feet (305 M) to maintain
the proper ratio of gas to air. If the installer must
convert the unit to adjust for varying altitudes, a
deration information sticker must be filled out by the
installer and adhered to the appliance at the time
of the conversion. Contact your local gas supplier
for deration requirements for your area.
1
READ ALL THE STEPS BEFORE STARTING THE CONVERSION.
INSTALLER NOTICE: THESE INSTRUCTIONS MUST BE LEFT WITH
THE APPLIANCE.
This kit contains components required to convert this appliance
from using Propane Gas to using Natural Gas as the only fuel.
All of these components must be replaced in order for the unit to
operate safely on Natural Gas.
When installing gas components use pipe joint compound or
Teflon tape on all pipe fittings before installing (ensure propane
resistant compounds are used, do not use pipe joint compounds
on flare fittings).
Screw
Glass Door
5/32” Allen
Wrench
INSTALLATION INSTRUCTIONS
Step 1. TURN OFF THE GAS SUPPLY TO THE APPLIANCE.
Step 2. Using a phillips screwdriver, remove and discard the two pressure
regulator mounting screws (see Figure 3). Remove the pressure
regulator and rubber gasket. Discard all removed components.
Install the new regulator. Ensure the rubber gasket on the back
of the pressure regulator is properly positioned when installing
the new pressure regulator using the new screws supplied with
this kit. Locate the label provided in the regulator kit. Write in
the required information, then affix it to the valve.
Gas Valve
(located in control compartment below firebox)
Regulator
Remove These
Screws
Fill out & affix label from
regulator kit to valve
Figure 5 - Remove Two Top Screws And Lift The Glass Off
Step 4. Carefully lift out the three brick panels (see Figure 6).
Rear Brick Panel
Rear Brick Panel
Side Brick Panel
Figure 3 - Replace Regulator on Valve
Using a 5/32” allen wrench, remove the glass door by first
Step 3.
loosening the three screws along the bottom (see Figure 4).
Next remove the two top screws and lift the glass off the three
screws below (see Figure 5 and Page 19 of the Installation and
Operation Manual). Carefully remove the logs. Exercise care so
as not to break the logs. Set aside in a safe place.
Glass Door
Figure 4 - Loosen 3 Screws at Bottom of Glass Door
2
Figure 6- Remove Brick Panel Set
Step 5. Remove the log set support by removing the two 5/32” allen
head screws located at the front edge. See Figure 7 .
Screw
5/32” Allen
Wrench
Log Set Support
Figure 7 - Remove Log Set Support
Step 6. To remove burner, unscrew the 5/32” allen head screw, securing
the right end of the burner. See Figure 8.
Step 7. Next, push the air shutter control lever in until it stops. See
Figure 9.
Step 8. Slide burner to the right until it comes off the burner orifice. Lift
the right end of burner until it releases from the copper rod. See
Figure 10.
Remove 5/32”
allen head screw,
Step 9. Firmly pull the pilot hood straight up and off to access the hexed
pilot orifice (see Figures 11 and 13). Use a 5/32” allen head
wrench to unscrew the pilot orifice and lift it out (see Figures
12 and 13). Replace with the new NG pilot orifice provided. Re-
install the pilot hood. Note: The raised part of the pilot bottom
lines up with the notch in the pilot hood (see Figure 13).
Pilot Hood
Figure 11 - Pull Off Pilot Hood
Figure 8 - Remove Screw From Burner
Push air shutter lever
in until it stops.
Figure 9 - Push In Shutter Lever
Burner Orifice
Burner Tube Assembly
Use 5/32” allen wrench
to remove pilot orifice
Figure 12 - Remove Pilot Orifice
Pilot
Hood
This raised part of
the pilot bottom
must line up with
the notch in the
pilot hood.
SIT Millivolt Pilot
Assembly Shown
Pilot
Orifice
Figure 10 - Remove Burner
Figure 13
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE.
3
Step 10.Using 1/2” open end wrench, remove the LP burner orifice. Install
the new NG orifice. Make sure to use pipe sealing compound on
threads of the new orifice (see Figure 14).
1/2” End Wrench
Burner Orifice
Figure 14 - Replace Burner Orifice
Step 11. Install burner, and make sure air shutter is 1/8” open (see in-
structions on Page 13 of the Installation and Operation Manual).
After step 15, with the appliance lit and fully warmed up, evaluate
the burner flame appearance and re-adjust air shutter for proper
flame appearance, if necessary.
Inlet Gas Supply Pressure
Fuel # Minimum Maximum Desired
Nat.
Gas
5" WC/po. C.E
(1.24 kPa)
10.5" WC/po. C.E
(2.61 kPa)
7" WC/po. C.E
(1.74 kPa)
Manifold Gas Supply Pressure
Fuel # Low High
Natural
Gas
(Lo) 1.7" WC/po. C.E
(0.42 kPa)
(Hi) 3.5" WC/po. C.E
(0.87 kPa)
Step 14. Reinstall the burner, log set support, log set and glass door
assembly. See Pages 9 and 10 (Log Set Installation) and Page
19 (Door Assembly Installation) in the Installation and Operation
Manual.
Step 15. Light the appliance per the lighting instructions label on appliance
(located below glass door) or lighting instructions on Page 14
in the Installation and Operation Manual. Inspect for proper pilot
and burner flame appearances. See Flame Color and Behavior
on Page 15 and Inspect The Pilot System For Proper Flame on
Page 16 in the Installation and Operation Manual. Also see
Figures 16 and 17 on this page.
Air Shutter Lever
Figure 15 - Adjust Air Shutter
Step 12. Turn on gas supply and test for gas leaks using a gas leak test
solution (see Test Procedure on Page 12 of the Installation and
Operation Manual).
Step 13. Using a manometer, test the inlet and manifold gas pressure
per instructions in the Installation and Operation Manual (Page
12) and as shown in the following 2 tables.
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE.
Lennox Hearth Products reserves the right to make changes at any time, without notice, in
design, materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information.
Printed in U.S.A. © 2008 Lennox Hearth Products
P/N 775,239M REV. A 08/2008
4
Figure 16 - Proper Pilot Flame Appearance
Soot at
Flame Tip
Dark Orange
Flame
No Blue Flame
Center
IMPROPERLY
BURNING FLAME
Soot above
Flame Tip
Ports on Pan
Burner Assembly
PROPERLY
BURNING FLAME
Figure 17 - Burner Flame Appearance
1110 West Taft Avenue • Orange, CA 92865
No Soot at
Flame Tip
Semi-Transparent
Yellow Flame
Blue Flame
Center
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