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 EVC - VAV Unit Controller Series   Modbus and Bacnet
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EVC - VAV Unit Controller Series Modbus and Bacnet
Item Id: EVCB14N
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Model#
Description

Control Features 

Field configured VAV algorithms 
Built-in actuator 70in.lb [8Nm] 
On board differential pressure sensor (pressure independent models) 
Manual or automatic pressure mode selection (pressure independent models) 
Configurable Inputs 
2 analog inputs 
2 digital inputs 
Configurable 
Outputs 2 analog outputs 
Up to 4 TRIAC outputs 
Configurable PI (Proportional-Integral) function 

Simple air balancing and commissioning via thermostat Independent,configurable proportional control band and dead band per ramp 
Selectable internal or external temperature sensor (10KO) 
External CO2 sensor input with integrated logic 
Change over by contact or external temperature sensor 
Freeze protection 

Operational Features 
24 Vac operation 
Backlit LCD with simple icon and text driven menus 
Configurable user display: setpoint, demand, temperature, etc. Selectable Fahrenheit or Celsius scale "Night Set Back" or "No Occupancy" modes with manual override 
Multi level lockable access menu 
Lockable setpoint Removable, raising clamp, non-strip terminals 
24Vac thermal fuse for overheat protection 
Network Communication BACnet MS/TP or Modbus RTU (selectable via menu) 
Select MAC address via DIP switch or via network 
BACnet MS/TP MS/TP @9600, 19200, 38400 or 76800 bps BACnet scheduler (up to 6 events) 

Firmware upgradeable via network 
COV (change of value) 
Copy and broadcast configuration to other EFCB modules via menu or network 
Automatic baud rate detection 
Automatic device instance configuration 

Modbus RTU Modbus RTU @9600, 19200, 38400 or 57600 bps RTU Slave, 8 bits (configurable parity and stop bits)


ModelPressure TriacFeedback
EVCB14NIT0SIndependent 0 -
EVCB14NIT2SIndependent2-
EVCB14NIT4S*Independent4-
EVCB14NDT4S*Dependent4-
EVCB14NIT0SFIndependent0Yes
EVCB14NIT4SF*Independent4Yes









* Includes options for "fan powered box" applications                                                                                  


Thermostat Model
Model Size 
TRL54 3 x 3 
TRL24 2 x 3


More technical info on VAV systems
http://www.ashrae.org/File%20Library/docLib/Journal%20Documents/2011%20October/018-029_murphy.pdf
http://www.ashrae.org/File%20Library/docLib/Public/2006412101925_686.pdf
http://www.ashraeqatar.com/images/VAV_fundamentals_ASHRAE.pdf



Images and information copyright Neptronic
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