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CONFIGURING THE FBVi-2U4-4T CONTROLLER
The
FBVi-2U4-4T
has a pre-loaded strategy that is designed to be highly configurable for a wide variety
of VAV sequences. The sequences can be selected by writing a value to the various input and output
codes that are within the strategy. There are multiple ways to configure the
sequence. Users are able to set these configuration values through CXproᴴᴰ.
Note:
For VAV sequences to meet
SETTING FBVi-2U4-4T BACNET COMMISSIONING CONFIGURATION CODES IN
CXPROᴴᴰ
When commissioning the FBVi, it is recommended to use the BACnet Commissioning option in CXproᴴᴰ.
Input codes
By clicking into the field associated with each input users will notice that there are multiple options
which can be selected:
•
UI-1 This input is typically going to be either local zone temperature or local zone temperature with
push-button override. The push-button override option is the override button for occupying the
VAV while in an unoccupied state. On some standard room sensors, this simply "shorts" the
thermistor while the button is pushed. If a CBT-Stat is being used, it can be configured as an
occupancy sensor or window sensor.
•
UI-2 This input is typically going to be configured for set point slide adjust. This input will support
a 5K POT to support room sensors. It can also be configured as an occupancy sensor or a window
sensor.
•
UI-3 This input is used as the Discharge Air Temperature. There are no configurable options for this
input.
•
UI-4 This input can be configured for a variety of different options. By default, it is configured for a
CO₂ sensor. Other options are:
Humidity Sensor
o
Occupancy Sensor
o
Window Sensor
o
Fan Status
o
Output codes
By clicking into the field associated with each output, multiple options can be selected:
•
DO-09 can be configured for first stage heat on/off control or to open a tristate actuator.
•
DO-10 can be configured for second stage heat on/off control or to close a tristate actuator.
•
DO-11 is configured for third stage heat on/off control.
•
DO-12 can be configured for parallel or series constant volume fan
•
AO-14 can be configured for modulating heat control. By default, this will be first stage heat unless
otherwise specified under options.
•
AO-15 can be configured for modulating heat control. By default, this will be second stage heat
unless otherwise specified under options. This output can also be configured for parallel variable
speed fan, or series variable speed fan.
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Subject to change without notice
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Standards, a discharge air sensor must be installed.
ASHRAE
Installation
FBVi-2U4-4T |
FBVi-2U4-4T
for a specific
45
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