Networkable VAV Controller
Specification and Installation Instructions
EVCB14-TRL-TDU-180315
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Controller Models
EVCB14NIT0S
(0 TRIACS / pressure independent)
EVCB14NIT2S
(2 TRIACS / pressure independent)
EVCB14NIT4S
(4 TRIACS / pressure independent)
EVCB14NDT4S
(4 TRIACS / pressure dependent)
EVCB14NIT0SF
(0 TRIACS / independent / feedback)
EVCB14NIT4SF
(4 TRIACS / independent / feedback)
TRL Series Thermostat
TRL24
(Thermostat 2x4)
TRLH24
(Thermostat 2x4 with Humidity)
TRLG24
(Thermostat 2x4 with CO
2
)
TRLGH24
(Thermostat 2x4 with CO
2
and Humidity)
TDU Series Thermostat
TDU10
(Grey LCD, white enclosure)
TDU40
(Black LCD, black enclosure)
TDU70
(Black LCD, white enclosure)
EVCB Series
TRL24 Series
TDU10 / TDU40 / TDU70 Series
Description
The EVCB Series is a combination controller and thermostat
with support for networked communications via the BACnet
MS/TP or Modbus protocol. The EVCB Series controller is
compatible with both TRL24 and TDU series thermostats. 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.
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
On board differential pressure sensor (select models)
Select direction on analog outputs
Simple air balancing and commissioning via thermostat
Automatically sets operation mode to pressure dependent
or independent based on the presence of air flow
Configurable PI (Proportional-Integral) function
Independent, configurable proportional control band and
dead band per ramp
Selectable internal or external temperature sensor (10KΩ)
Activate output with CO
2
sensor from TRL/TDU or external
sensor input
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 setback 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 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
