Honeywell TC300 User Manual

Terminal assignment 23
TERMINAL ASSIGNMENT
Terminal assignment
Table 12: Terminal assignment
Type Terminal Label
Terminal Assignments
Default Inputs Outputs
Digital
Output
DO1 DO1 On/Off Heat NA Heating On/Off, Heating Floating
Open, Cooling Floating Open, Valve
On/Off, Valve Floating Open,
Changeover Valve, Fan Command,
High Speed Fan, Medium Speed Fan,
Low Speed Fan, Auxiliary Heat, Heat
Stage1, Valve Stage1
Note: Changeover valve used to switch
between heating and cooling mode.
DO2 DO2 On/Off Cool NA Heating Floating Close, Cooling
Floating Close, Cooling On/Off, Valve
Floating Close, Changeover Valve, Fan
Command, High Speed Fan, Medium
Speed Fan, Low Speed Fan, Auxiliary
Heat, Cool Stage1
D03 DO3 NA NA Cooling Floating Open, Changeover
Valve, Fan Command, High Speed Fan,
Medium Speed Fan, Low Speed Fan,
Auxiliary Heat, Heat Stage1, Cool
Stage1
DIO1 DIO1 NA Discharge Air Sensor,
Drain Pan Sensor,
Occupancy Sensor, Proof
of Airflow, Pipe Sensor,
Space Temp Sensor,
Changeover Switch
Cooling Floating Close, Changeover
Valve, Fan Command, High Speed Fan,
Medium Speed Fan, Low Speed Fan,
Auxiliary Heat
DIO2 DIO2 NA Discharge Air Sensor,
Drain Pan Sensor,
Occupancy Sensor, Proof
of Airflow, Pipe Sensor,
Space Temp Sensor,
Changeover Switch
Changeover Valve, Fan Command,
High Speed Fan, Medium Speed Fan,
Low Speed Fan, Auxiliary Heat
Universal
Input/
Output
UIO1 UIO1 NA Discharge Air Sensor,
Drain Pan Sensor,
Occupancy Sensor, Proof
of Airflow, Pipe Sensor,
Space Temp Sensor,
Changeover Switch
6-Way Valve, Modulating Cool,
Modulating Heat, Modulating Valve,
Variable Speed Fan
UIO2 UIO2 NA
UIO3 UIO3 NA

Honeywell TC300 Specifications

General

Brand	Honeywell
Model	TC300
Category	Thermostat
Language	English