Appendix A: VAV Zone II Points/Properties
VAV Zone II Controllers
CARRIER CORPORATION ©2019
Installation and Start-up Guide
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83
Point Name/Description
Default/Range
CV Modulating PID
– This BACnet object calculates the amount of capacity required to
satisfy the current space temperature setpoint, when the terminal is heating and the
Heat Type
is set to
CV Modulating
.
CAUTION
The default values should be changed only by a technician trained in PID
Loop algorithms.
D: Type = reverse
Update Interval = 0:15
P = 20 (40 metric)
I = 1.0 (2.0 metric)
D = 0
Bias = 0
Deadband = 0
VAV Heating
– Set to
Enable
to have the terminal modulate its airflow to meet a zone
heating demand when the air source mode is Heating or Warm-up. Always set to
Disable
for parallel fan terminals.
D:
R:
Disable
Disable/Enable
Number of Heat Stages
– The number heat stages when the
Heat Type
is
Staged EH
.
Fan-powered terminals are limited to no more than 2 stages.
D:
R:
Two stages
One stage
Two stages
Three stages
Valve Type
– Two Position hot water only - The hot water valve's position with no power
applied to the valve.
D:
R:
NC
NC/NO (normally
closed/normally open)
Hardwired Sensor
– The type of sensor used on the controller's
RH/CO2
hardwire input.
This setting determines the control channel input function.
Options:
RH Sensor –
Relative humidity for zone dehumidification
IAQ Sensor
– Indoor air quality for DCV control
NOTE
RH and IAQ are also available with communicating ZS RH and CO
2
sensors.
D:
R:
None
None
RH Sensor
IAQ Sensor
RH Control
– Enables or disables zone dehumidification control if valid RH sensor
values are available.
D:
R:
Disable
Disable/Enable
DCV Control
– Enables or disables demand control ventilation control.
D:
R:
Disable
Disable/Enable
Min Setpoint Separation
– Minimum separation that must be maintained between the
heating and cooling setpoints.
D:
R:
4 °F (2.2 °C)
2 to 10 °F
(1.1 to 5.5 °C)
Occ Override Normal Logic State
– The normal state of the controller's
Remote
Occupancy
input. If the input's contact is the same state as the configured state, the
controller follows its controlling schedule. If the contact is in the opposite state of the
configured state, the controller is forced into the unoccupied mode.
D:
R:
Open
Open/Closed
RH Sensor Min Input Volts
– The lowest voltage that should be read from the hardwired
relative humidity (RH) sensor.
D:
R:
0.00 V
0 to 5.00 V
RH Sensor Max Input Volts
– The highest voltage that should be read from the
hardwired RH sensor.
D:
R:
5.00 V
0 to 5.00 V
RH Sensor Value @ Min Volts
– The % relative humidity that correlates to the hardwired
RH sensor's low voltage reading.
D:
R:
0%
0 to 99%
Содержание VAV Zone II
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