Tracer® Zn520 Controllers - Trane VUV Installation, Operation And Maintenance Manual

Thermostat Button Function
Figure 79. Fan speed control
UP – Used to increase the set temperatures and to adjust
configuration settings.
DOWN – Used to decrease the set temperatures and to adjust
configuration settings.
SYS – Used to change from OFF, HEAT, COOL and AUTO
changeover modes.
CONFIG – Used to enter configuration and advance to the next
configuration screen.
FAN – Used to turn the fan on and off. Also used to cycle
through fan speeds
SYS then CONFIG – Held in simultaneously for 10 seconds to
lock and unlock the thermostat.
Up and Down – Pressed simultaneously to display pipe
sensor temperature if pipe sensor is connected.
Thermostat Operating Modes
There are four possible operating modes for the thermostat.
OFF, Cool, Heat, and Cool & Heat modes are accessed by
pressing the SYS button.
Note: The modes you can access are based on your
configuration.
OFF Mode
In this mode, the thermostat will not turn on the heating or
cooling devices
Note: The fan (when configured as continuous fan) can be
turned on manually in off mode by pressing the FAN
button. The word FAN shows on the display and the fan
icon appears when the fan operates.
Heat Mode
In this mode, the thermostat controls the heating system.
When the heat outputs, the flame icon
display.
Cool Mode
In this mode, the thermostat controls the cooling system. When
the cooling outputs, the snowflake icon
display.
Heat and Cool Mode
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In this mode, the thermostat can automatically turn on heat or
cool as needed. AUTO appears on display with heat set point
and cool set point.
Fan Mode
Only use auto fan mode. The fan speed is determined by the
number of degrees the room temperature differs from the set
point.
Testing Thermostat
Once the thermostat is configured, it should be thoroughly
tested. If using pipe sensors, verify pipe sensor is within range
to output. Check pipe temperature by pressing the UP and
DOWN buttons simultaneously.
Heat Test (For systems with heat)
1. Press SYS button until heat mode is displayed.
2. Adjust the set temperature so it is 5 degrees above the
3. Heat should come on within a few seconds.
4. Adjust the set temperature 2 degrees below the room
Cool Test (For systems with cooling)
1. Press SYS (left) button until cool mode is displayed.
2. Adjust set temperature so it is 5 degrees below room
3. Cooling should come on within a few seconds.
4. Adjust the set temperature 2 degrees above the room
Fan Test (System off)
Press FAN button to toggle between Fan Off, Fan Hi, Fan Med
or Fan Low.
Tracer® ZN520 Controllers
Tracer® ZN520 controller is a discrete speed controller that
can be used in a stand-alone application or can communicate
with a building automation system using LonTalk
Communication.
ZN520 Stand-Alone Operation
The factory pre-programs the Tracer® ZN520 with default
values to control the temperature and unit airflow. Use Tracer
Summit® building automation system or Rover™ software to
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change the default values. For more information, refer to:
•
Follow the procedure below to operate the Tracer® ZN520 in
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a stand-alone operation:
1. Turn power on at the disconnect switch option.
2. Position the fan mode switch to either high, medium, low,
room temperature.
temperature and the heat should turn off. There may be a
fan delay on your system.
temperature.
temperature and the cool should turn off. There may be a
fan delay on your system.
CNT-SVX04*-EN Installation, Operation, and
Maintenance manual for Tracer® ZN520
or the auto position.
Start-Up
®
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