Wire Color
Black
Orange*
Blue
Red
Blower Speed Chart
Motor Speed
High
Med-High
Medium
Low
* Med-High speed may not be provided on all models.
Change the heat or cool blower motor speed by removing
the motor lead from the "Heat" or "Cool" terminal and re-
place it with the desired motor speed lead from the "Un-
used Motor Lead" location. Connect the wire previously
removed from the "Heat" or "Cool" terminal to the vacated
"Unused Motor Lead" terminal.
If the same speed must be used for both heating and cool-
ing, remove the undesired motor speed lead from the
"Heat" or "Cool" terminal and connect that lead to the
open terminal at "Unused Motor Lead" location. Attach a
jumper between the "Heat" and "Cool" terminals and the
remaining motor speed lead.
Note: For motors with (4) speed leads, it will be necessary
to tape off the terminal of the motor speed lead removed
from the "Heat" or "Cool" terminal with electrical tape since
an open terminal will not be available at the "Unused Mo-
tor Lead" location.
Continuous Fan Operation
A terminal is provided on the electronic fan control located in the
circulating blower compartment for operation of the continuous
fan option. This connection is intended for the low speed motor
tap, and has a lower contact rating (8 amps) than the heat and
cool taps. When the low speed blower lead is connected to this
terminal, this will provide low speed blower operation whenever
the other two speeds (Heat or Cool) are not energized.
Thoroughly check the system after modification to ensure the
proper operation of the circulating air blower in all modes of op-
eration.
Separate speed selections for Heat, Cool, and Continuous
Fan
Connect low speed lead from circulating motor to the "Cont" ter-
minal at the electronic fan control. The appropriate motor leads
should already be connected to the "Heat" and "Cool" terminals.
Heating and Continuous Blower Speed the Same
If it is necessary to operate the heating speed and continuous
blower speed using the same blower speed, connect a jumper be-
tween the "Heat" and "Cont" terminals on the electronic fan con-
trol.
Note: There should be only ONE motor lead going to the "Heat"
and "Cont" terminals.
9. FurnaceMaintenance
CAUTION
It is recommended that the furnace be inspected and serv-
iced on an annual basis (before the heating season) by a
qualified service technician.
See "User's Information Manual".
PressureSwitch
During regular yearly maintenance check for cracks in any tubes
on the pressure switch.
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