Viconics VZ7260X Installation Guide - Manual (Page 26)

26 | VZ7260B Series - Installation Guide
CL Perfo
Controller’s cooling
performance
Default value: None
Not a configuration parameter. Only displays the
controller’s performance in cooling mode.
This value is only valid if there’s no change in system
mode, setpoints or occupancy for at least 1.5 hours. These
changes cause the value to reset to an invalid value
(above 20°F)
UI3 Dis
UI3 display value
Used as diagnostic or service help to troubleshoot and
diagnose sensor operation
Supply or Discharge temperature
CO2
Room CO2 value
Used as diagnostic or service help to troubleshoot and
diagnose sensor operation. This value is displayed only if
AI4 parameter is set to CO2.
0 to 2000 ppm
AI4 I
NPUT FOR
CO2 S
ENSOR
The VZ7260x5x00B series features a 0-10VDC CO2 sensor input which value can be used
by the VZ7656E1000B controller for Indoor Air Quality (AIQ) control.
Here’s the table showing the CO2 value treatment based on the AI4 parameter settings:
AI4
parameter
setting
CO2 display
at the
controller
Value Written to
VZ7656E1000B
Room CO2
Value available
in ppm (BACnet
object)
AI4 Value
available in
VDC (BACnet
object)
None NO NO NO YES
CO2 YES
YES (Only in
Occupied mode)
YES YES