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** = Minimum wire size of 18 AWG
wire should be used for all field
installed 24 volt wire.
* = Only required on units with
supplemental electric heat.
PROGRAMMABLE
THERMOSTAT ONLY
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors cancause improper and
Figure 7: Typical Field Control Wiring Diagram
Johnson Controls Unitary Products
THERMOSTAT
R
G
Y
W
O
C
dangerous operation. Verify proper operation after servicing.
UNIT CONTROL BOARD
TERMINAL STRIP
*
*
R
G
Y
*
W
2
W
1
O
C
268723-BIM-C-0908
NOTE: HEAT ANTICIPATOR
SHOULD BE SET AT 0.25
AMPS FOR ALL MODELS.
24 VOLT
TRANSFORMER
9
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