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6.
Rewire applicable wires and perform a leak test on all fittings. Perform a drop pressure test.
SF-20/25/30/35/42F, SFV-20/25/30/35/42F and SH-35/42F
1.
Turn off gas and power, then disconnect gas and power supply at the furnace. Label wires as necessary.
2.
Remove the vent cap assembly by removing applicable screws.
3.
Remove the cabinet front two (2) screws.
4.
Remove the (1) one tie down screw securing the chamber to the cabinet.
5.
Remove the furnace from the cabinet by pulling chamber outward completely to gain access to all controls and applicable parts.
6.
To re-install, reverse this procedure.
7.
Rewire applicable wires and perform a leak test on all fittings. Perform a drop pressure test.
P-30S and P-40
1.
Turn off gas and power, then disconnect gas and power supply at the furnace. Label wires as necessary.
2.
Remove the vent cap assembly by removing applicable screws and one (1) flue retaining screw. (Not applicable to P40.)
3.
Remove the cabinet front two (2) screws.
4.
Remove the (2) two tie down screw securing the chamber to the cabinet.
5.
Remove the furnace from the cabinet by pulling chamber outward completely to gain access to all controls and applicable parts.
6.
To re-install, reverse this procedure.
7.
Rewire applicable wires and perform a leak test on all fittings. Perform a drop pressure test.
SF, SH AND SHD-2542 ELECTRODE GAP SPECIFICATIONS AND POSITIONING
To assure consistent ignition of the burner, it is important for the electrode to be positioned properly over the top of the burner. When
replacing the electrode, or should you be experiencing ignition type problems, the electrode should be positioned as outlined in the
drawing.
1.
Remove the furnace chamber assembly from the furnace cabinet following instructions listed in the installation manual.
2.
Remove the burner access door. Manifold assembly will have to be removed at the valve. Remove the burner from the combustion
chamber by removing six (6) screws which attach the burner to the chamber and air baffles (plates). Remove top air baffle and clip.
3.
Locate the lance in relation to the burner ports for electrode positioning by:
a.
Shine a flashlight into the burner venturi as illustrated (be sure the flashlight lens is against the end of the burner).
b.
Light will reflect off the lance in the venturi of the burner and shine through a position of the two (2) rows of burner ports in
the top of the burner.
c.
Using a black felt-tip pen, mark a line along top of burner 3/16" from back of lance and parallel with lance. Make an additional
mark indication center line of the lance. (See illustration). Both marks will be used later as reference marks; therefore, keep
lines thin.
4.
Reassemble the burner into the chamber. Be sure the air baffles (plates) are positioned as removed. Mount center clip in place.
5.
Adjust electrode so the electrode probe is positioned along the marked center line of the burner lance and the tip of the electrode
terminates 3/16" from the back of the lance (at the line marked in Step 3C). (See illustration).
6.
IMPORTANT: Be sure electrode probe maintains a 1/8" spark gap over the burner as illustrated.
7.
Reinstall burner access door and reconnect manifold. Manifold must be checked for leaks with unit operating, before installing in
cabinet. Reinstall furnace into the cabinet following the instructions in the installation manual. Check all gas connections for leaks
using proper leak test solution.
43
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