Carrier 30MP - Control Loop Parameters; ACR and RCR Timers; PID Control Parameters

Appendix C: 30MP Multi-chiller Points/Properties
30MP Multi-chiller CARRIER CORPORATION ©2018
Installation and Start-up Guide All rights reserved
38
Point Name/Description
Range
ACR Timer
– (Additional Capacity Required) Determines the time delay before an
additional compressor stage can be added.
D:
R:
5:00 minutes
2:00 - 20:00 minutes
RCR Timer
– (Reduced Capacity Required) Determines the time delay before an
additional compressor stage can be removed.
D:
R:
3:00 minutes
1:00 to 5:00 minutes
Cool PID
– This BACnet Object calculates the amount of capacity required to satisfy the
Chilled Water Setpoint
and allows access to the control loop's tuning parameters.
NOTE
The following default values should be changed only by a technician trained in PID
Loop algorithms.
Action
Update Interval
Proportional
Integral
Derivative
Deadband
Bias
direct
0:30 (mm:ss)
100
0
0
0
0
Tower Fan Output Type –
Defines the type of fan output control. D:
R:
0-10 V
0-10 V
2-10 V
Tower Fan PID
– This BACnet Object calculates the fan speed required to achieve the
desired condenser water temperature setpoint.
NOTE
The following default values should be changed only by a technician trained in PID
Loop algorithms.
Action
Update Interval
Proportional
Integral
Derivative
Deadband
Bias
direct
1:00 (mm:ss)
10
2
0
0
0
Occ Contact Normal Logic State
– Specifies the occupancy contact's normal logic state. 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 2.00 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 40%
RH Sensor Value @ Max Volts
– The % relative humidity that correlates to the hardwired
RH sensor's high voltage reading.
D:
R:
100%
60 to 100%
System Space RH
– Allows using another controller's relative humidity value over the
network. The remote controller must be equipped with a network-accessible relative
humidity sensor value.
D:
R:
-999
2 to 100%