Conversion To Propane - Slant/Fin LYNX LX-85 Installation And Operating Instructions Manual

Lynx Model LX-85
SCREWS
VENTURI
GAS PIPE
PROPANE ORIFICE
RUBBER GROMMET
DISCONNECT GAS PIPE
GAS VALVE
Figure 27. Propane orifice installation.
CONVERTING TO PROPANE
A conversion kit, complete with the appropriate orifice disk and
conversion label, is available for performing this procedure.
Refer to the Lynx model LX-85's boiler's parts list publication
LX-10PL for the kit part number. This conversion kit can only be
used for the LX-85 boiler. The following procedure for perform-
ing the conversion to Propane is intended for a Lynx boiler that
is not yet installed. If the boiler is already installed, be sure to
turn the gas and power supply off, before proceeding. Once the
boiler is installed, the combustion should be checked, as per the
instructions and specifications on page 36. The fuel input rate
for Propane will be approximately as specified on page 2, when
the supply pressure is in the range of 10" to 14" w.c.
1. Remove the boiler jacket top panel, by removing the 2
screws near the back and lifting as the top panel is slid
toward the back. Remove the boiler jacket front panel,
by pulling forward from the top, and lifting off the pivots
at the bottom. (See Figure 26a).
2. Lift the control panel up over the jacketing by removing
the 2 screws in front, and folding at the hinge while
lifting upward from the bottom. Position the notches in
the side brackets onto the jacket side panel pivots, to
secure in place. (See Figure 26b).
3. Remove the heat exchanger enclosure front cover, by
unlatching the 2 top corners and lifting as the cover is
pulled forward from the top. (See Figure 26c).
4. Remove the gas valve cable, by turning the single
screws on the plug end counter-clockwise until free.
(See Figure 27).
5. Disconnect the gas valve supply pipe, by turning the
nut at the valve inlet counter-clockwise until free.
(See Figure 27).
6. Remove the 2 Torx or Phillips screws securing the
venturi to the blower.
7. Remove the venturi/gas valve assembly, taking note of
VENTURI GASKET
COMBUSTION BLOWER
GAS VALVE CABLE
SCREW
DISCONNECT GAS VALVE CABLE
the position of the gasket behind the venturi, for
reassembly purposes.
8. Remove the 3 Torx or Phillips screws securing the gas
valve to the venturi. (See Figure 27).
9. Remove the black rubber grommet from the gas valve,
by where the venturi was attached.
10. Place the Propane orifice disk into the black rubber
grommet, confirm the stamp on the orifice disk
matches the number specified on page 2 of this
manual for the boiler model being converted.
11. Replace the black rubber grommet, with the Propane
orifice disk, into the gas valve pocket from which it was
removed.
12. Reassemble the venturi to the gas valve, being careful
that the grommet and orifice disk are kept in the proper
positions until the screws are secured.
13. Reinstall and tighten the 2 Torx or Phillips screws that
secure the venturi/gas valve assembly to the blower.
14. Re-connect the gas valve supply pipe, by aligning
properly with the rubber gasket in place, and turning
the nut at the valve inlet clockwise until tight.
15. Replace the gas valve cable and secure with the
single screws.
16. Affix the Propane conversion label next to the boiler
rating plate.
17. If the boiler is in the process of being installed, it is
best to check the combustion and make any necessary
adjustments before replacing the heat exchanger cover
and jacket panels. See page 36 of this manual. If the
boiler installation is to occur at a future time, the heat
exchanger cover and jacket panels can now be rein-
stalled, and the combustion check should be performed
after the boiler is installed.
WARNING:
Only a trained, experienced Service
Technician or Installer should per-
form the conversion procedure.
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