Sure Heat 2008 Four Seasons FSIS Natural Gas Conversion Kit - Manual (Page 4)

10. Remove the front control panel, use a screw driver to
remove the twelve (12) screws securing the bezels and
the manifold in position. (See Fig. 10)
11. Replace the LP manifold with the one provided in the
NG conversion kit. Use the twelve screws removed in
step 10 to attach the bezels and manifold onto the front
control panel. (See Fig. 10 -11)
NOTE:
Make sure the “ OFF” position facing up as it was.
The igniter wires are preassembled, be careful DO
NOT remove the igniter wires from the valves on
the NG manifold.
12. Disconnect the flex line and side burner orifice from the
side burner casting. (See Fig. 12)
13. Unscrew the LP side burner orifice from the flex line.
Replace it with the supplied NG side burner orifice. (See
Fig. 13)
14. Connect the flex line and orifice onto the side burner
casting. (See Fig. 14)
Flex line
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Side burner orifice
Fig. 10
FSISLP Natural Gas Conversion Instructions
Orifice
Flex line
Orifice