Binary outputs
CNT-SVX04A-EN
17
For Tracer ZN.520 zone controller units configured and applied as 2-pipe
hydronic heat/cool changeover with electric heat, terminals J1-5 and J1-6 are
used to control the primary valve (for both cooling and heating), and terminals
J1-9 and J1-10 are used only for the electric heat stage.
For those 2-pipe changeover units, electric heat will not be energized while the
hydronic supply is hot (5 or more degrees above the space temperature).
Ta bl es 9–22 give example usage of the binary outputs for various
configurations.
Example applications
Table 9 Two-pipe cooling valve control
J1-1 Fan high
J1-2 Fan medium/Exhaust fan
J1-3 Fan low
J1-4 (Key)
J1-5 Cool—open
J1-6 Cool—close
J1-7 Not used
J1-8 Not used
J1-9 Not used
J1-10 Not used
J1-11 Outdoor air damper—open
J1-12 Outdoor air damper—close
TB4-1 Generic output
TB4-2 24 VAC
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