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CNT-SVX07C-EN, Zone Controller Input/output functions and wiring for typical applications
Models:
Zone Controller
CNT-SVX07C-EN
N512
1
44
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Troubleshooting
Specifications
Fan off delay
Red LED Service indicator
Input/output terminal wiring
Dimension
Maintenance
Diagnostics
ZN Zone temperature
Power-up sequence
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Chapter 4 Input/output functions and wiring for typical applications
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CNT-SVX07C-EN
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Contents
Installation and Operation Tracer ZN521 Zone Controller
Page
CNT-SVX07C-EN April
CNT-SVX07C-EN
Tracer ZN521 Zone Controller Installation and Operation
CNT-SVX07C-EN
Contents
Sequence of operations
Status indicators for operation and communication
Troubleshooting Index
Overview and specifications
Product description
Clearances
Dimensions
Storage environment
Plastic-cover model dimensions and clearances
Agency listing/compliance
Additional components
Tracer zone temperature sensor options
Damper actuators
Zone humidity sensor
CO2 sensor
Overview and specifications
Input/output terminal wiring
AC-power wiring
General wiring information
Communication-link wiring and addressing
General wiring information
Location recommendations
Operating environment requirements
Mounting recommendations
Mounting the Tracer ZN521 zone controller
Typical applications for the Tracer ZN521 zone controller
Application SpeedfanMultiple Dehumidification
ControlValve Economizing
HeatElectric
BI1 Low-coil-temperature detection
Binary inputs
BI2 Condensate overflow
Binary inputs
BI3 Occupancy or generic binary input
BI4 Fan status
ZN Zone temperature
Analog inputs
GND Ground terminals
Analog inputs
SET Local setpoint
FAN Fan mode input
AI1 Entering water temperature
AI2 Discharge air temperature
AI3 Outdoor air temperature or generic temperature
AI4 Universal 4-20 mA
AI4 configuration options and associated measurement ranges
Configuration Measurement range
AI4 terminal wiring CO2 measurement
Binary outputs
Generic binary output
Binary output functions
Binary output Functions
Wiring requirements and options
Overriding binary outputs
Required controller inputs for proper operation
Function Input source For more information See
Two-pipe hydronic-cooling unit
Two-pipe hydronic-heating unit
Two-pipe hydronic heating/cooling unit with auto changeover
Four-pipe hydronic heating/cooling unit
Four-pipe heating/cooling unit with auto changeover
Two-pipe heating unit with DX cooling
Electric heat unit with DX cooling
Electric heat unit
Two-pipe heating unit with face-and-bypass damper
Two-pipe heating/cooling unit with face-and-bypass damper
Four-pipe heating/cooling unit with face-and-bypass damper
Input/output functions and wiring for typical applications
Power-up sequence
Random start
Occupied mode
Unoccupied mode
Occupied standby mode
Occupancy modes
Occupied bypass mode
Timed override control
Simplified zone control
Zone temperature control
Cascade zone control
Heating or cooling mode
Discharge air tempering
Morning warm-up
Morning cool-down
Entering water temperature sampling function
Fan operation
Exhaust control
Exhaust control
Valve operation
Modulating valve operation
Modulating valve calibration
Valve control options
Modulating outdoor/return air dampers
Two-position valve operation
Isolation-valve operation
Two-pipe operation
Modulating outdoor air damper position
Economizing free cooling
Ashrae Cycle 1 conformance
Ashrae Cycle 2 conformance
Two-position control of a modulating outdoor air damper
Face-and-bypass damper operation
DX cooling operation
Face-and-bypass, isolation-valve operation
Dehumidification
Electric heat operation
Baseboard heat operation
Peer-to-peer communication
Unit protection strategies
Smart reset
Low-coil-temperature protection
Fan off delay
Condensate overflow
Freeze avoidance
Filter-maintenance timer
Freeze protection discharge air temperature low limit
Test button
Tracer ZN521 zone controller circuit board
Manual output test
For non
Output
Close damper, air Outdoor Open damper, air Outdoor
Step Result
BOP1 BOP2 BOP3 BOP4 BOP5 BOP6 BOP7 BOP8 BOP9
Service pin button
Red LED Service indicator
Interpreting LEDs
LED activity Explanation
Green LED Status indicator
Yellow LED Communications indicator
Diagnostics
Types of diagnostics
Table of diagnostics
Diagnostics
Diagnostic Probable cause Consequences Type
Fan unaffected
Valved unaffected
Position
Damper unaffected
Status indicators for operation and communication
Fan does not energize
Probable cause Explanation
Troubleshooting
Valves remain closed
Valves remain open
DX or electric heat does not energize
Outdoor air damper remains closed
Outdoor air damper remains open
Outdoor air damper remains open
Troubleshooting
Index
Numerics
Index
Index
Index
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