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