Trane Zone Controller, N512, CNT-SVX07C-EN manual General wiring information

Chapter 2 General wiring information

CAUTION

Complete input/output wiring before applying power to the Tracer ZN521 zone controller. Failure to do so may cause damage to the con- troller or power transformer due to inadvertent connections to power circuits.

IMPORTANT

Do not share 24 Vac between controllers.

All wiring must comply with National Electrical Code and local codes.

The ac-power connections are in the top left corner of the Tracer ZN521 zone controller (see Figure 3).

Figure 3. Connecting ac-power wires to the controller

H

24 Vac

transformerN

The Tracer ZN521 may be powered by an existing transformer integral to the controlled equipment, provided the transformer has adequate power available and proper grounding is observed. If you are providing a new transformer for power, use a UL-listed Class 2 power transformer supply- ing a nominal 24 Vac (19–30 Vac). The transformer must be sized to pro- vide adequate power to both the Tracer ZN521 zone controller (14 VA) and its associated output devices, including relays and actuators, to a maximum of 12 VA per output utilized.

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