Lennox Hearth L20 BF-2 - Manual (Page 19)

PROPANE CONVERSION
PAGE 19
7. High / Low Pressure Regulator Installation Procedure:
a. Remove regulator cap and conversion screw (see follow-
ing illustration).
b. Install the new conversion screw (Red = Propane LP gas,
Blue = Natural Gas). Ensure that the conversion screw is
finger tight. Install the new regulator cap.
c. Affix conversion label on gas control valve body where it
can easily be seen.
8. Reinstall burner cover, logs, ember wool / ceramic rocks
and glass front.
9. Purging Air from Supply Line:
This should only be done by a qualified (& licensed where
applicable) professional. Check with your local building
official for qualifications required to perform this proce-
dure.
10. Purge air from the gas line (see #9 above), then connect
propane gas line to the appliance. Connect the fuel line to
the insert inlet (1/2” NPT fitting) using the fitting required.
11. Perform leak Test.
CAUTION : After this procedure is complete with appli-
ance installed and connected to gas line, recheck the
pilot connection and manifold fittings for leaks, using
soapy water or a gas leak detector.
4. Lighting Procedure-See page 15.
NOTE: If the gas control knob is turned to the “off” posi-
tion after pilot has been lit, the appliance must be allowed
to cool for at least five minutes before pilot flame can be
relit.
13. Apply the propane conversion label to the rating label.
The Appliance is ready for use with propane fuel as its only
fuel.
REFERENCE INFORMATION
See pages 4, 27 and 28 of this manual for the following refer-
ence information:
Manifold Gas Pressure
Inlet Gas Pressure
Input Ratings
BURNER FLAME APPEARANCE
A periodic visual check of burner flames should be performed.
The burner flame should appear as indicated on page 21 -
Burner Flame Appearance.
Conversion
Screw
Color Code
Propane Natural
Gas
Red Blue