Page 18 of 20
507389-02
Issue 1733
Combustion
Inducer
Snap into
place
first
(visible after
reinstalled
in unit)
Inducer
Orifice
Then snap
into place
Figure 12.
1.
The combustion orifice is held in place with snap-fits at
the inducer inlet and at the indicator tab at the inducer
mounting foot.
2. With the combustion inducer out of the unit, carefully
pry the round portion of the orifice from the inducer
inlet.
3. Remove the indicator tab from the inducer mounting
foot.
4. For reassembly, follow the above steps in reverse
order.
Furnace Condensate Drain
The condensate drain ensures proper evacuation of
furnace condensate from the collector box and flue out
of the cabinet. If hoses are disconnected or if the drain
is removed and replaced, the drain must be primed as
described in the procedure outlined in the “Start-up”
section. To remove the condensate drain:
1. Disconnect the upper and lower drain hoses at the
condensate drain.
2. Remove the two screws that secure the drain to the
vest panel.
3. For reassembly, follow the above steps in reverse
order.
4. Prime the condensate drain as described in the
procedure outlined in the “Start-up” section.
Condensate Heater Thermostat
1. Disconnect the two lead wires at the thermostat.
2. Remove the three screws that secure it to the panel
and pull the thermostat free.
3. For reassembly, follow the above steps in reverse
order.
Condensate Heater
1.
Remove the control board mounting bracket as
described previously.
2. Remove the furnace condensate drain, and upper and
lower hoses as described previously.
3. Disconnect the two lead wires at the “24VAC” and
“GND” terminals on the ignition control board.
4.
Remove the drain fitting by disconnecting the drain
line and:
a.
When side-exit drain is used, slide the fitting to the
left to disengage it from the division panel, then
lift out.
b.
When front-exit drain is used, slide the fitting away
from you to disengage it from the division panel,
then lift out.
5. Remove the screw securing the heater panel to the
vest panel.
6. Remove the 2 side panel screws on either side of the
drain fitting and “flex” the panel outward as you pull
the heater panel toward you, out of the compartment.
7. For reassembly, follow the above steps in reverse
order.
Heat Exchanger Inspection
The heat exchanger should be inspected periodically and
cleaned if necessary. The assembly can be inspected
in place, but cleaning requires accessing both ends
of the primary and secondary tubes, which can only be
accomplished by removing the heat exchanger assembly
from the furnace cabinet. To access the primary heat
exchanger tubes for inspection:
1. Remove the burner & manifold assembly as described
previously.
2.
Remove the control board mounting bracket as
described previously.
3.
Check the tubes for evidence of soot. If the tubes
are clean, reassembly is the reverse of the above
procedure. If there is noticeable soot, continue with
the heat exchanger removal procedure to remove and
clean the heat exchanger.
