UNDERVIEW
REMOVE SCREW BEFORE
SLIDING OUT BLOWER
NOTE: USE VACUUM ATTACHMENT
WITH A SOFT BRUSH
FIGURE 5
4.5 FURNACE
APPEARANCE
4.6 CLEANING
IMPORTANT:
Be careful not to bend the fi ns when cleaning. You may wish to leave this maintenance
procedure to your service technician.
H27.5
The furnace exterior fi nish is a durable automotive like coating. It may be washed with mild soap if necessary.
Galvanized metal surfaces require no maintenance.
It is advisable to keep dust build-up on warm surfaces to a minimum, since dust, in some cases, can be a
combustible.
Dust build-up in the circulating fan can impair blower performance; therefore, reduce effi ciency.
The recovery coil is located immediately above the blower assembly. Over time, it may become coated with
dust. To clean the recovery coil:
1. Turn off electrical power to the furnace.
2. Remove the blower access door
3. Remove the screws fastening the blower assembly to the blower division panel.
4. Unplug harness from blower division, junction box and remove thermostat wires (label wires to correct
position).
5. Remove screw from UV bracket, carefully pull UV light out of blower division. Set the UV light aside.
6. Pull the blower assembly out.
7. Once the blower assembly has been removed, the coils may be vacuumed with the soft brush attachment.
(Figure 5)
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS.
WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION
.
ALWAYS VERIFY OPERATION AFTER SERVICING.
CAUTION
!
!
W415-1243 / E / 11.27.17
UM
70
Summary of Contents for ULTIMATE 9700 Series
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