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CNT-SVX07D-EN
Overview and specifications
This guide provides installation and configuration information for the Tracer ZN521 zone controller,
as well as a description of its operations. The overview includes a product description,
specifications, and descriptions of ancillary products that may be necessary.
Product description
The Tracer ZN521 is an application-specific controller that provides direct-digital zone temperature
control. The controller can operate as a stand-alone device or as part of a building automation
system (BAS). Communication between the controller and a BAS occurs by means of a LonTalk
communication link, which complies with the LonTalk protocol.
The Tracer ZN521 supports the following equipment:
•
Fan coils
•
Unit ventilators
•
Blower coils
The Tracer ZN521 can be configured to control:
•
Tri-state modulating or two-position valves
•
Tri-state modulating dampers:
outdoor/return air, and face-and-bypass
•
DX cooling (single stage)
•
Electric heat (two stages)
It is designed to be field-installed and is sent from the factory unconfigured. Use the PC-based
Rover service tool to configure the controller for specific applications.
Note:
For information about using the Rover service tool, see the current version of the Rover
Installation/Operation/Programming guide (EMTX-SVX01).
Storage environment
If a Tracer ZN521 zone controller is to be stored for a substantial amount of time, store it in an indoor
environment that meets the following requirements:
•
Temperature: –40° to 185°F (–40° to 85°C)
•
Relative humidity: 5–95%, noncondensing
Dimensions
Plastic-cover model dimensions
For complete dimensional drawing, see Figure 1 on page 7.
•
Height: 5.375 in. (137 mm)
•
Width: 6.875 in. (175 mm)
•
Depth: 2 in. (51 mm)
Metal-cover model dimensions
For complete dimensional drawing, see Figure 2 on page 8.
•
Height: 9.0 in (25 mm)
•
Width: 10.37in. (263 mm)
•
Depth: 2.25 in. (58 mm)
Summary of Contents for Tracer ZN521
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