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CNT-SVX07C-EN 1
Chapter 1
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 descrip-
tions 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 unconfig-
ured. 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
Rover Installation/Operation/Programming guide (EMTX-
SVX01A-EN).