AAON VCCX2 User Manual

8VCCX2 Controller Technical Guide
OVERVIEW
Applications
Variable Air Volume Unit
Units designed for VAV cooling with VAV boxes are equipped
with reheat to satisfy heating demands in individual spaces. In this
application, unit heat is used for Morning Warm-Up. The controller
can be congured to control the supply fan variable frequency drive
to maintain a Duct Static Pressure Setpoint.
VAV units that may require heating operation to “temper” the outdoor
air are congured as Supply Air Tempering.
Space Temperature Controlled
Space temperature-controlled units require the space temperature
sensor as the mode enabling sensor.
Return Temperature Controlled
Return temperature-controlled units require the return temperature
sensor as the mode enabling sensor. This application is used for a
VAV voting system.
Space Temperature Control of High
Percentage Outdoor Air Units
Units are congured to use the space temperature as the mode
enable sensor. When the space temperature is satised, the controller
will utilize the outdoor air temperature sensor as the mode enable
sensor before entering vent mode to avoid dumping unconditioned
air into the space.
Single Zone Variable Air Volume
Units are congured to use the space temperature as the mode enable
sensor. The supply fan modulates based o of the space temperature
for fan energy savings. This application can be congured with high
percentage of outdoor air functionality.
Make-Up Air Unit
Units are congured to use the outdoor air temperature as the
mode enable sensor. Application assumes unit has return air to
allow for unoccupied operations with outdoor air damper closed.
Dehumidication mode utilizes the outdoor air dewpoint.
Dedicated Outdoor Air System
Units are congured to use the outdoor air temperature as the
mode enable sensor. Application assumes unit has return air to
allow for unoccupied operations with outdoor air damper closed.
Dehumidication mode utilizes the outdoor air dewpoint and resets
the coil temperature based o the supply air dewpoint.
HVAC Mode by Binary Inputs
Units are congured as VAV units and use binary inputs to initiate
heating, cooling, vent and dehumidication modes of operation.

AAON VCCX2 Specifications

General

Brand	AAON
Model	VCCX2
Category	Controller
Language	English