Trane UniTrane Installation, Operation And Maintenance Instructions

98 UNT-SVX07B-EN
Start-Up
Zone Sensor
The Tracer ZN520 controller accepts the following zone sensor module inputs:
• Space temperature measurement (10kΩ thermistor)
• Local setpoint (either internal or external
on the zone sensor module)
•Fan switch
• Timed override (On) and Cancel timed override
• Communication jack
Space Temperature Measurement
Trane zone sensors use a 10kΩ thermistor to measure the space temperature. Typically, zone
sensors are wall-mounted in the room and include a space temperature thermistor. As an option,
the zone sensor can be unit-mounted with a separate space temperature thermistor located in the
unit’s return air stream. If both a hardwired and communicated space temperature value exist, the
controller ignores the hardwired space temperature input and uses the communicated value.
External Setpoint Adjustment
Zone sensors with an external setpoint adjustment (1kΩ) provide the Tracer ZN520 controller with
a local setpoint (50°F to 85°F or 10°C to 29.4°C). The external setpoint is exposed on the zone
sensor’s front cover.
Table 28. Analog inputs
Description Terminals Function Range
Zone TB3-1 Space temperature input 5°F to 122°F (-15°C to 50°C)
Ground TB3-2 Analog ground NA
Set TB3-3 Setpoint input 40°F to 115°F (4.4°C to 46.1°C)
Fan B3-4 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°F to 212°F (-40°C to 100°C)
J3-2 Analog ground NA
Analog input 2 J3-3 Discharge air temperature -40°F to 212°F (-40°C to 100°C)
J3-4 Analog ground NA
Analog input 3 J3-5 Fresh air temp/generic temp -40°F to 212°F (-40°C to 100°C)
J3-6 Analog ground NA
Analog input 4 J3-7 Universal input 0% to 100%
Generic 4–20mA 0% to 100%
Humidity 0 to 2000 ppm
CO
2
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 temperature sensor are
10KΩ 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.

Trane UniTrane Specifications

General

Brand	Trane
Model	UniTrane
Category	Heater
Language	English