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Testing
Step 1. Reconnect the power supply at the circuit breaker.
Step 2. Return gas to the system and relight the appliance.
Step 3. With the main burner "ON", test the new pressure
regulator assembly and all gas line joints for leaks
using a gas leak test solution.
NOTE: The lighting instructions can be found on
the lighting label in the control compartment or in
the Care and Operation Instructions provided with
the appliance.
Step 4. Inspect the pilot system for proper flame appearance.
The pilot flame should engulf the flame sensor as
shown in Figure 4.
Step 5. Inspect the burner for proper flame appearance
(Figure 5).
Figure 5: Burner Flame Appearance
Step 6. Using a manometer, test the inlet and manifold
gas pressures by cycling the appliance with the remote
control. Refer to Table 4 and Table 5 for optimal gas
supply pressures.
NOTE: Always test pressures with the valve regulator
control at the highest setting.
Fuel #
Minimum
Natural Gas
5.5 in. WC (1.37 kPa)
Propane
11.0 in. WC (2.74 kPa)
Table 4: Inlet Gas Supply Pressure
Fuel #
Low
Natural Gas
1.6 in. WC (0.4 kPa)
Propane
6.3 in. WC (1.57 kPa)
Table 5: Manifold Gas Supply Pressure
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.
LENNOX
, the LENNOX design, DAVE LENNOX, the image of DAVE LENNOX and other related LENNOX
®
marks are registered or common law trademarks of Lennox Industries Inc. and are used with permission.
Printed in U.S.A. © 2012 Lennox Hearth Products LLC
4
P/N 506019-99 Rev. NC 06/2012
Step 7. Adjust the air shutter as necessary.
After Installing the Kit
Step 1. Reinstall the logs and the grate assembly /
Step 2. Reinstall the appliance front door. Refer to the
Step 3. Reassemble the remaining components by reversing
Step 4. Attach the conversion label provided in the conversion
Step 5. The BTU input for these appliances is shown in
Maximum
10.5 in. WC (2.61 kPa)
13.0 in. WC (3.23 kPa)
High
3.5 in. WC (0.87 kPa)
10.0 in. WC (2.49 kPa)
NOTE: Refer to the Care and Operation Instructions
provided with the appliance for more information.
Amount of Primary Air
If air shutter is closed too far
Flame will be orange
If air shutter is open too far
Flame will be blue
Table 6: Air Shutter Adjustment Guidelines:
contemporary media, if applicable.
appliance Installation Instructions (P/N 506023-15).
the procedures outlined in the preceding steps.
kit to the rating plate on the appliance.
Table 7.
Model No.
Natural Gas
MDLX40IN
MDLX45IN
Propane Gas
MDLX40IP
MDLX45IP
Table 7: Input (BTU/HrR)
1508 Elm Hill Pike, Suite 108 • Nashville, TN 37210
Air Shutter
Flame Color
Adjustment
Air shutter gap should
be increased
Air shutter gap should
be decreased
Input (BTU/Hr)
32,000 to 50,000
38,500 to 60,000
32,000 to 50,000
38,500 to 60,000
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