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3. System Configuration
Warning: Thermostat should be configured for use with a conventional system
(not heat pump).
Note: When either Y2 or W2 is left unconnected, it is recommended to set
SW2-6 to the OFF position.
1. All wiring shown should be performed with 18 AWG thermostat wire.
2. Terminals on the PAC-US444CN-1 support 20-30VAC.
3. High/medium/low fan signals are optional, and may not be available on all
thermostat models.
4. W2 and Y2 signals are optional, and may be omitted for single-stage thermostats.
Example 1: Two-stage Cooling and Heating
Note: When both Y2 and W2 are connected, it is recommended to set SW2-6 to
the ON position.
Thermostat Interface
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