BPGE14 Gas Electric Package Unit Installation Manual

Page 12 of 14 507295-01BIssue 1810
Heat Exchanger
With proper combustion adjustment, the heat exchanger
of a gas-red furnace will seldom need cleaning. Sooting
of a gas appliance is highly irregular and once cleaned,
the cause of the sooting must be determined. If the heat
exchanger should become sooted, it can be cleaned as
follows:
1. Remove the burner assembly as outlined in the Burner
and Burner Orice Instructions section.
2. Remove the combustion blower.
3. At the bottom of the heating section, remove the screws
holding the ue collector box. Carefully remove the ue
collector box without ripping the adjacent insulation.
4. Using a wire brush on a exible wand, brush out the
inside of each heat exchanger from the burner inlet
and ue outlet ends.
5. Brush out the inside of the ue collector box.
6. Run the wire brush down the heat exchanger tubes
from the ue collector end.
7. If soot buildup is excessive, remove the vent motor and
clean the wheel and housing. Run the wire brush down
the ue extension at the outlet of the vent housing.
8. After brushing is complete, blow all brushed areas with
air. Vacuum as needed.
9. Replace parts in the reverse order they were removed
in Steps 1 through 3.
10. When replacing the ue collector box, be careful so as
not to tear the adjoining insulation.
11. Assure that all joints on the vent side of the combustion
system are air tight. Apply a high temperature (+500°F)
sealing compound where needed.
Control System Diagnostics
Table 4. Fault Codes
LED Status Flashing Rate Fault Description
Slow Flash
One ash
per second
Normal operation:
No call for heat
Fast Flash
Two ashes
per second
Normal operation:
Call for heat
2 Flash
Two ashes
in second with
1-second pause
System lockout:
Failed to detect or
sustain ame
3 Flash
Three ashes in
1.5 seconds with
1-second pause
Pressure switch senses
incorrect pressure or gas
valve coil is open.
4 Flash
Four ashes in
2 seconds with
1-second pause
High limit or rollout
switch open
5 Flash
Five ashes in
2.5 seconds with
1-second pause
Flame sensed and gas
valve not energized
Steady --
Internal failure:
Micro-controller failure;
self-check