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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.
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.
Figure 17 - Burner Flame Appearance
No Blue Flame
Center
Soot at
Flame Tip
Dark Orange
Flame
IMPROPERLY
BURNING FLAME
Soot above
Flame Tip
No Soot at
Flame Tip
PROPERLY
BURNING FLAME
Semi-Transparent
Yellow Flame
Blue Flame
Center
Ports on Pan
Burner Assembly
Figure 16 - Proper Pilot Flame Appearance
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 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.
Figure 14 - Replace Burner Orifice
Figure 15 - Adjust Air Shutter
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).
Burner Orifice
1/2” End Wrench
Air Shutter Lever
1110 West Taft Avenue • Orange, CA 92865
4
Printed in U.S.A. © 2008 Lennox Hearth Products
P/N 775,239M REV. A 08/2008
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.
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE.