Chapter 4 Input/Output Functions And Wiring For Typical; Applications - Trane Tracer ZN521 Installation And Operation Manual

Table 2. Typical applications for the Tracer ZN521 zone controller
Application
2-pipe hydronic cooling only
2-pipe hydronic heating only
2-pipe changeover
2-pipe steam only
4-pipe hydronic heating and cooling
4-pipe changeover
4-pipe steam/chilled water
Electric heat only (single- and two-stage)
DX/hydronic heating
DX/steam heating
DX cooling only
CNT-SVX07C-EN
Chapter 4
Input/output functions and
wiring for typical applications
This chapter provides information about the function of inputs and out-
puts and examples of wiring for typical applications. Applications sup-
ported by the Tracer ZN521 zone controller are shown in Table 2.
x
x
x x
x
x x
x x
x
x
x
Figures 7 through 17 (pages 23 through 33) show typical wiring diagrams
that include all required and all optional components for typical applica-
tions.
x x
x x x
x x x
x x x
x x x
x x x
x x
x x
x x
x x x
x x
x x x
x x
x x
x x
x x
x x ×
x x
x x
x x x
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