28
R C Y G W
Flame Signal
Light (Yellow)
3 Amp Fuse
COM
24 V
HUM
Neutrals
4
1
5
2
6
3
7
8
9
4
5
6
1
2
3
EAC
HUM
M1
M2
M3
COOL
HEAT
L1
XFMR
Unused Motor
Leads
EAC
Electronic Air Tap
(.5A@ 120 VAC)
Status
Light (Red)
Humidifier Tap
(.5A@ 120 VAC)
Connect
Neutral
Lead of
Electronic
Air Cleaner
and/or Humidifier
Here.
Common
Leads
These motor speed taps are
not used for variable speed models
Figure 25. Integrated Control
temperature below room temperature, shut off the power
to the furnace, and replace the limit switch.
DESCRIPTION OF COMPONENTS
Figure 27 shows the location of each of the functional
components described below. Also, refer to the Sequence
of Operation Section of this manual . If any component of
the furnace must be replaced, use only factory authorized
replacement parts. See the Replacement Parts List for the
factory authorized replacement for each component.
Flame Sensor
The flame sensor acts to prove that flame has carried over
from the igniter to the opposite end burner. If no flame is
sensed, the furnace will shut down within 7 seconds of
ignition.
Flame Roll-Out Switch
The flame roll-out switch verifies that the burner flames are
drawn into the heat exchanger tubes. If the burner flames
are not properly drawn into the heat exchanger, the flame
roll-out switch will open. The circulating air blower (and
combustion blower, if connected) will continue to operate if
the flame roll-out switch opens.
Gas Valve
The gas valve controls the flow of gas to the burners. When
the gas valve is energized it automatically opens and
regulates the gas pressure in the manifold.
Pressure Switch
The pressure switch verifies that the inducer is drawing the
combustion gases through the heat exchanger.
Supply Air Limit Switch
The supply air limit switch prevents the air temperature
leaving the furnace from exceeding the maximum allowable
outlet air temperature.
Vent Safety Switch
The vent safety switch shuts the furnace down if the vent
becomes blocked or restricted.
Summary of Contents for 060C-12
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