Trane Tracer ZN521, Инструкция по установке и эксплуатации

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CNT-SVX07D-EN 19
Input/output functions and wiring for typical applications
Generic binary output
Binary output 10 is the only output that can be configured as a generic binary output. When
configured as a generic binary output, it can be controlled only by a BAS, and has no direct effect
on Tracer ZN521 operation.
Overriding binary outputs
The Tracer ZN521 controller includes a manual output test and a water valve override feature. Use
the manual output test to manually control the outputs in a defined sequence. For information, see
“Manual output test,” p. 43 .
The water valve override feature is a procedure used for water balancing. Using the Rover service
tool or a BAS, a user can specify that a Tracer ZN521 override the state of water valves to:
•
Open all valves
• Close all valves
The controller resets itself to normal operation after two hours.
Wiring requirements and options
Table 7 shows required controller inputs for minimal proper operation of all applications.
Figure 7, p. 20 through Figure 17, p. 30 show typical applications that include all required and all
optional components.
Table 7. Required controller inputs for proper operation
Function Input source
For more information,
see:
24 Vac power Terminals: GND, 24 V “AC power wiring,” p. 10
Zone temperature
Terminals: ZN, GND
or communicated
“ZN: Zone temperature,”
p. 15
Discharge air temperature Terminals: AI2
“AI2: Discharge air
temperature,” p. 16
Entering water temperature—
required only for units with auto
changeover
Terminal: AI1
or communicated “AI1: Entering water
temperature,” p. 16
Outdoor air temperature—
required only for economizing Terminals: AI3 or
communicated
“AI3: Outdoor air
temperature or generic
temperature,” p. 16
Relative humidity—required only
for dehumidification
Terminals: AI4
“AI4: Universal 4–20 mA,”
p. 17