Trane LO - Manual (Page 61)

UNT-IOM-6 61
Tracer ® ZN.520
Tracer ® ZN.520 Unit
Start-Up
Refer to the Trane publication, CNT-IOP-2 Installation Operation and
Programming Guide, to operate the Tracer ® ZN.520 with Trane
Integrated Comfort™ System (ICS). The factory pre-programs the
Tracer ® ZN.520 with default values to control the temperature and unit
airflow. Use Tracer Summit ® building automation system or Rover™
software to change the default values.
Follow the procedure below to operate the Tracer ® ZN.520 in a stand-
alone operation:
1) Turn power on at the disconnect switch option.
2) Position the fan mode switch to either high, medium, low, or
the auto position.
3) Rotate the setpoint dial on the zone sensor module to 55 F
for cooling or 85 F for heating.
The appropriate control valve will actuate assuming the following
conditions:
1) Room temperature should be greater than 55 deg. F and less
than 85 deg. F
2) For a 2-pipe fan-coil unit with an automatic changeover
sensor, the water temperature input is appropriate for the
demand placed on the unit.For example, cooling operation is
requested and cold water (5 degrees lower than room tem
perature) flows into the unit.
4) Select the correct temperature setpoint.
Note: Select and enable zone sensor temperature settings to prevent
freeze damage to unit.
Tracer ® ZN.520 is a Comm 5 controller. There is no need to set an
address. Each individual board has its own unique Neuron I.D.
number that takes the place of dip switches.
The Tracer ® ZN.520 operates the fan in the following modes:
1) occupied
2) unoccupied
3) occupied standby
4) occupied bypass
5) Tracer Summit with supply fan control
Tracer ®
Communications
Tracer ® ZN.520
Sequence of
Operation