Networkable VAV Controller
Specification and Installation Instructions
EVCB14N-TRL54-V505-191004-ESA
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Models
EVCB14NIT0S
(0 TRIACS / pressure independent)
EVCB14NIT2S
(2 TRIACS / pressure independent)
EVCB14NIT4S
(4 TRIACS / pressure independent)
EVCB14NIT4X
(4 TRIACS / independent / external motor)
EVCB14NDT4X
(4 TRIACS / dependent / external motor)
EVCB14NDT4S
(4 TRIACS / pressure dependent)
EVCB14NIT0SF
(0 TRIACS / independent / feedback)
EVCB14NIT4SF
(4 TRIACS / independent / feedback)
For use with either floating or modulating actuators
TRL54
(Thermostat 3x3)
Description
The EVCB Series is a combination controller and thermostat with
support for networked communications via the BACnet MS/TP or
Modbus protocol. The Networkable VAV Controller is designed for
simple and accurate control of any variable air volume box in a
number of zone control configurations. Its field configurable
algorithms enable versatile implementation of required control
sequences.
EVCB Series / TRL54
Typical Application
Applications
•
Single duct, cooling only
•
Single duct cooling and/or heating
•
Up to 4 stage reheat and/or cool
•
Up to 4 On/Off heat and/or cool
•
Up to 4 time proportioned (TPM) heat or reheat
•
Up to 2 analog (0-10Vdc) reheat and/or cool
•
Up to 2 floating heat and/or cool
•
Pressure dependent or pressure independent
•
With or without auto changeover
•
Supply/exhaust (requires an additional EVC)
Features
•
Field configured VAV algorithms, inputs and outputs
•
Built-in actuator, 70 lb-in. (select models, not available on
EVCB14NIT4X and EVCB14NDT4X)
•
Control external actuators using analog (0-10Vdc, adjustable)
or floating signals with feedback (models EVCB14NIT4X and
EVCB14NDT4X)
•
On board differential pressure sensor (select models)
•
Simple air balancing and commissioning via thermostat
•
Automatically sets operation mode to pressure dependent or
independent based on the presence of air flow
•
Select direction on analog outputs
•
Configurable PI (Proportional-Integral) function
•
Independent, configurable proportional control band and dead
band per ramp
•
Selectable internal or external temperature sensor (10KΩ)
•
External CO2 sensor input with integrated logic
•
Changeover by contact or external temperature sensor
•
Internal and external temperature sensor calibration
•
Optional potentiometer feedback for increased precision of
actuator position
•
Freeze protection
•
Removable, raising clamp, non-strip terminals
Operational Features
•
Backlit LCD with simple icon and text driven menus
•
Select thermostat’s default display
•
Network service port via on-board mini USB connector
•
Manual night set back or no occupancy override
•
Multi level lockable access menu and setpoint
•
Selectable Fahrenheit or Celsius scale
•
3-wire connection to controller and 4 push buttons
Network Communication
•
BACnet MS/TP or Modbus communication port
•
Select MAC address via DIP switch or via network
•
Automatic baud rate detection
BACnet MS/TP®
•
Automatic device instance configuration
•
Copy & broadcast configuration via thermostat menu
or via BACnet to other controllers
•
BACnet scheduler
•
Firmware upgradeable via BACnet
•
Support for COV (change of value)
Modbus
•
Modbus @ 9600, 19200, 38400 or 57600 bps
•
RTU Slave, 8 bits (configurable parity and stop bits)
•
Connects to any Modbus master
