Built-in Humidifier System, 2 Wire
•
This system has a humidifier built into its HVAC system and 2 separate hum wires.
•
Install the 2 hum wires directly into the relay
•
Run the single wire from the relay to the * terminal.
•
Nest recommends the White Rogers 90-290Q or similar 24VAC HVAC relay.
Built-in Humidifier System, 1 Wire
•
This system has a humidifier built into its HVAC system and only 1 hum wire.
•
Connect the hum wire from the built-in system directly to the * terminal.
•
No relay is recommended.
35
