AAON VCCX2 - Overview of the VCCX2 Controller; VCCX2 Controller Features

7VCCX2 Controller Technical Guide
OVERVIEW
Features
The VCCX2 Controller is designed with eight analog inputs, four
analog outputs, eight binary inputs, and eight relay outputs (seven
congurable). It also has an on-board BACnet port for connection
to an MS/TP network. The VCCX2 contains a 2 x 8 LCD character
display and four buttons that allow for status and alarm display,
force modes, and BACnet conguration.
The VCCX2 Controller’s capabilities are expanded with modules
including the Refrigerant System Modules (RSM) MHGRV-X,
MODGAS, EM1 and 12 Relay Expansion Module.
There are two EBUS expansion ports to allow communication to
the modules and sensors.
The VCCX2 Controller provides for the following applications:
constant air volume (CAV), variable air volume (VAV), single zone
VAV, make-up air (MUA), dedicated outdoor air system (DOAS),
and space temperature control of high percentage outdoor air.
Other features of the VCCX2 include:
• Controls up to eight digital compressors
• Controls up to four sets of tandem variable frequency drive
(VFD) compressors
• Controls up to 12 stages of heat
• Modulating cooling output for chilled water valve control
• Modulating heating output (hot water valve, steam valve,
SCR electric heat control)
• Advanced dehumidication capabilities
• Air-to-air heat pump and water source heat pump
applications
• Airow monitoring of outdoor air, supply air, return air, and
exhaust air streams with approved EBTRON, GreenTrol,
or Paragon Airow MicroTransEQ Monitoring Stations
• Airow control of outdoor air damper
• Single zone VAV control with optional CAV heating
• Primary/secondary heating control
• Remote forced occupied, cooling, heating, and
dehumidication control
• Remote supply air temperature reset signal
• Adaptive supply air temperature reset
• Selectable mode enable sensor
• Fan proving
• Dirty lter alarm
• Emergency shutdown input (smoke detector/restat or
other shutdown conditions)
• Drybulb/wetbulb/dewpoint/comparative enthalpy control
of economizer operation
• Waterside economizer capability
• Building pressure control strategies
• Indoor air quality economizer reset
• Title 24 economizer (FDD)
• Seven-day, two-events-per-day scheduling
• 14 holiday event scheduling
• Daylight Saving Time adjustment
• Trend logging
• Static pressure control
• Heat wheel capabilities
• Head pressure control
• On-board MS/TP BACnet
BACnet is a registered trademark of ASHRAE.
ASHRAE does not endorse, approve or test
products for compliance with ASHRAE
standards. Compliance of listed products to the
requirements of ASHRAE Standard 135 is the
responsibility of BACnet International. BTL is
a registered trademark of BACnet International.