UNT-IOM-6 75
Tracer
®
ZN.520
Table 28. Analog Inputs
Description Terminals Function Range
Zone TB3-1 Space temperature input 5° to 122°F (-15° to 50°C)
Ground TB3-2 Analog ground NA
Set TB3-3 Setpoint input 40° to 115°F (4.4° to 46.1°C)
Fan TB3-4 Fan switch input 4821 to 4919 W (Off)
2297 to 2342 W (Auto)
10593 to 10807 W (Low)
13177 to 13443 W (Medium)
15137 to 16463 W (High)
Ground TB3-6 Analog ground NA
Analog Input 1 J3-1 Entering water temperature -40° to 212°F (-40° to 100°C)
J3-2 Analog ground NA
Analog Input 2 J3-3 Discharge air temperature -40° to 212°F (-40° to 100°C)
J3-4 Analog ground NA
Analog Input 3 J3-5 Fresh air temp/Generic temp -40° to 212°F (-40° to 100°C)
J3-6 Analog ground NA
Analog Input 4 J3-7 Universal Input 0 – 100%
Generic 4-20ma 0 – 100%
Humidity 0 – 2000ppm
CO2
J3-8 Analog ground NA
Ground J3-9 Analog ground NA
Notes:
1) The zone sensor, entering water temperature sensor, discharge air sensor, and the outside air tempera-
ture sensor are 10KW thermistors.
2) Zone sensor:
Wall mounted sensors include a thermistor soldered to the sensor’s circuit board.
Unit mounted sensors include a return air sensor in the units return air stream.
3) Changeover units include an entering water temperature sensor.
Analog Inputs
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