Propane Conversion Kit Instructions

6
NOTE: For hybrid models, the control board dip switches need
to be set to 2 stg position to set and verify first stage heat.
(See installation instructions supplied with the unit for dip switch
settings.)
23. Using a soap and water solution, check for leaks around
the gas valve/manifold connection and the burner orifices.
Repair any leaks before continuing.
24. NOTE: Any other gas-fired equipment should be ON be-
fore any adjustments are made.
After the furnace has been in operation for 15 minutes,
adjust the gas supply pressure (not manifold pressure) to
obtain a range between 11” and 13” W.C. If the gas inlet
pressure falls outside of this range, then make necessary
L.P. service regulator(s) adjustments; check piping size,
etc., and /or consult with local L.P. provider.
25. With the furnace operating in its low-fire (W1) condition,
the manifold pressure should be 6” W.C.± 0.30”. If neces-
sary, this pressure can be adjusted using the low regula-
tor adjustment screw. Turn clockwise to increase pres-
sure and counterclockwise to decrease manifold pressure.
26. Readjust the room thermostat to obtain a second stage
call for heat (W2). The manifold pressure for the W2 con-
dition should be 10” W.C. ± 0.30” W.C. If necessary, this
pressure can be adjusted using the gas valve high regula-
tor adjustment screw. Turn clockwise to increase pres-
sure and counterclockwise to decrease manifold pressure.
27. Using the room thermostat to cycle the unit, observe a
minimum of three (3) smooth ignition cycles.
28. Turn off gas and electrical supply to the furnace. Remove
the barbed manometer fittings from the 1/8” NPT holes in
the gas valve. Seal inlet and outlet plugs removed earlier
with pipe joint compound or pipe thread tape and reinstall.
29. Install the regulator cover screws provided with the conver-
sion kit.
30. IMPORTANT NOTE: Apply the conversion label (B14933-
151) provided with the conversion kit. This label must be
attached adjacent to the rating plate.
31. For hybrid models, control board switches may need to be
re-set to single stage operation depending on installers
preference of operation.
32. Reinstall the access panels.
33. Turn on the gas and electrical supply.
34. Reset all other appliances so they function normally.
NOx SCREEN REMOVAL
NOTE: To prevent premature heat exchanger failure, follow
the instructions below to remove all metal screen inserts from
the entrance of heat exchanger tubes during propane
conversions. Not all models will have metal screen inserts.
NON-CONDENSING FURNACES AND PACK-
AGE GAS-ELECTRIC
1. Remove the screws securing the burner box to the parti-
tion panel. Separate burner box from unit.
2. Remove the screw(s) securing the NOx screen retention
plate and remove the plate.
3. Remove and discard NOx screens.
4. Reinstall the NOx screen retention plate and burner box.