Appendix A: VVT Bypass Controller Points/Properties
VVT Bypass Controller
Carrier Proprietary and Confidential
CARRIER CORPORATION ©2017
Installation and Start-up Guide
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29
NOTE
Engineering units shown in this document in the defaults and ranges are strictly for reference. You
must enter an integer only.
Status
Navigation:
i-Vu® / Field Assistant:
Properties
>
Control Program
>
Status
Point Name/Description
Range
Static Pressure - Prime Variable
– The current supply duct static pressure. This value is
shown on the default area graphic in i-Vu or Field Assistant.
R: 0 to 2.0 in. H
2
O
(0 to .498 kPa
Supply Air Temperature
– If
Airside Linkage Status
is
Active
, this is the air source’s
current supply air temperature. If
Airside Linkage Status
is
Not Active
, this value is from
the local SAT sensor.
R: -56 to 245°F
(-48.9 to 118.3°C)
Damper Position
– If
Control Device Type
is
Actuator
, this is the current open damper
position.
R: 0 to 100%
VFD output
– If
Control Device Type
is
VFD
, this is the current VFD speed capacity.
R: 0 to 100%
LAT Control
– The status of LAT Limit duct static pressure override control of the
bypass.
R: On/Off
LAT Airflow Increase
– If
LAT Control
is
On
, this is the percent of increase in supply
airflow that the overriding
LAT Duct Static Pressure Setpoint
will provide above the
normal
Controlling Pressure Setpoint
.
R: 0 to 100%
Unit Configuration
Navigation:
i-Vu® / Field Assistant:
Properties
>
Control Program
>
Unit Configuration
Point Name/Description
Default/Range
Control Device Type
– The device the controller uses to control static pressure.
D:
R:
Actuator
Actuator/VFD drive
Power Fail Restart Delay
– How long the controller delays normal operation after the
power is restored.
D:
R:
60 seconds
0 to 600 secs
Automatic Deadband Adjustment
– If using an actuator, set to Enable to automatically
adjust the damper for full travel to correctly scale the damper position. If using a VFD
drive, set to Disable.
D:
R:
Enable
Enable/Disable
Appendix A: VVT Bypass Controller Points/Properties