Trane LO Tracer ZN.520 Unit Start-Up Tracer Communications, Tracer ZN.520 Sequence of Operation

Tracer® ZN.520

Tracer® ZN.520 Unit Start-Up

Tracer® Communications

Tracer® ZN.520

Sequence of

Operation

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

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