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W2
— Second-Stage Heat
Y2
— Second-Stage Compressor
RS2
— Second Remote Sensor (Not Used)
RS+5
— +5 vdc for 2 Sensors
RS1
— Remote Sensor
RS GND — Ground for 2 Sensors
THERMOSTAT
B
O
W2 Y2 R W1 Y1 G C
Fig. 3 — Typical Wiring (Single-Stage Cooling Units)
The Unoccupied Cooling Set Point is configured in Step 1.
The acceptable range of values is 35 to 99 F. The configura-
tion can also be set to OF (does not allow unoccupied cool-
ing). After the desired temperature has been configured, press
the Mode button to continue to Step 2.
The Unoccupied Heating Set Point is configured in Step 2.
The acceptable range of values is 35 to 75 F. The configura-
tion can also be set to OF (does not allow unoccupied heat-
ing). After the desired temperature has been configured, press
the Mode button to continue to Step 3.
B. Heat Pump Configuration (Steps 3 and 4)
To set the thermostat for heat pump operation, Advanced Setup
Step 3 must be configured to ON. Use the UP and DOWN
ARROW buttons to configure the step. The default is OFF.
Fig. 2 — Thermostat Wiring
TYPICAL
UNIT
24 VAC COMMON
FAN RELAY
COMPRESSOR RELAY
1st STAGE HEAT CIRCUIT
24 VAC RETURN
2nd STAGE HEAT CIRCUIT
LEGEND
W1/O/B
— First-Stage Heat or Reversing Valve
Y1
— First-Stage Compressor
G
— Fan
W3/ECO — Third-Stage Heat or Economizer (Not Used)
CK1
— Dry Contact
CK2
— Dry Contact Ground
R
— 24 vac Transformer
C
— 24 vac Transformer
Common
THERMOSTAT
B
O
W2 Y2 R W1 Y1 G C
L
E
C
G
Y1
O
W1
R
Y2
W2
Fig. 4 — Typical Wiring (Two-Stage Cooling Units)
Press the Mode button to continue to Step 4. Step 4 is used to
set the reversing valve polarity for the heat pump. The vari-
able can be set to either ''B'' or ''O.'' Set the reversing valve
polarity to the correct value depending on the application. The
default is ''O.''
NOTE: Step 4 will appear only if Step 3 is set to ON. Step 5
will appear only if Step 3 is set to OFF.
C. Electric Heat Configuration (Step 5)
Step 5 is used to configure the thermostat for electric heat.
The variable can be configured ON or OFF. The default is
OFF.
NOTE: Step 5 will appear only if Step 3 is set to OFF.
—3—
24 VAC COMMON
FAN RELAY
COMPRESSOR RELAY
1st STAGE HEAT CIRCUIT
24 VAC RETURN
2nd STAGE COMPRESSOR RELAY
2nd STAGE HEAT CIRCUIT
TYPICAL
UNIT
L
E
C
G
Y1
O
W1
R
Y2
W2
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