Carrier RTU Open User Manual

21
IDF Max Speed Voltage – This is the maximum voltage out-
put for control of the fan while using voltage terms. Applicable
when using variable speed fan control and voltage control type.
Factory Default = 10Vdc
IDF Min Speed Voltage – This is the minimum voltage output
for control of the fan while using voltage terms. Applicable
when using variable speed fan control and voltage control type.
Factory Default = 5.2Vdc
IDF Heat Speed Voltage – This is the heating mode desired
voltage output for control of the fan while using voltage terms.
Applicable when using variable speed fan control and voltage
control type.
Factory Default = 5.2Vdc
Max VFD Output – The maximum VFD signal the RTU Open
controller supplies to the VFD as a percentage of its range. The
balancer can set this to adjust the unit's maximum airflow. Applies
to Variable Speed fan control. (LC size 07-26 units by default)
Range = 33 to 100%
Default = 100%
Min VFD Output – The minimum VFD signal he RTU Open
controller supplies to the VFD as a percentage of its range. The
balancer can set this to adjust the unit's minimum airflow. Applies
to Variable Speed fan control only. (LC size 07-26 by default)
Range = 33 to 100%
Default = 40%
Heating VFD Output – This is the heating mode desired per-
centage output for control of the fan while using percentage
terms. Applicable when using variable speed fan control and
percentage control type.
Factory Default = 100%
Stage 1 SAT Setpoint – The VFD Supply Air Setpoint during
stage 1 cooling. Must be at least 4°F greater than Minimum
Cooling SAT parameter.
Range = 45 to 75°F
Default = 57°F
Stage 2 SAT Setpoint – The VFD Supply Air Setpoint during
stage 2 cooling. Must be at least 4°F greater than Minimum
Cooling SAT parameter.
Range = 45 to 75°F
Default = 57°F
Stage 3 SAT Setpoint – The VFD Supply Air Setpoint during
stage 3 cooling. Must be at least 4°F greater than Minimum
Cooling SAT parameter.
Range = 45 to 75°F
Default = 56°F
Heat Type – Indicates the type of heat which is installed in the
unit. Electric is any unit without gas and a Gas unit is one
which requires gas input for heating.
Factory Default = Gas for gas units and Electric for all other
units (cooling only units and heat pumps)
Number of Heat Stages – Indicates how many heat stages are
available for use. See configuration in Appendix A for details
on specific unit configuration.
Factory Default =1 for single heat stage units
2 for dual stage units
0 for cooling only units
SA Tempering – Supply Air Tempering allows heating, if in-
stalled, to temper OA while unit is in Fan Only, IAQ Override,
or Purge Modes.
Factory Default = Disable
Continuous Occupied Exhaust – This point tells the control-
ler when to run the power exhaust if equipped on the unit.
If set to YES, the power exhaust will be on all the time when in
occupied mode and will be off when in unoccupied mode. If set
to NO the power exhaust will be controlled by the Power Ex-
haust Setpoint.
Default = NO
RH Control – Enables dehumidification control if an RH sen-
sor is available and the unit has the Humidi-MiZer
®
dehumidi-
fication option installed.
Range = Disable/Enable
Default = Disable (Enabled with Humidi-MiZer option)
DCV Control – Enables demand controlled ventilation (DCV)
if valid CO
2
sensor value is available and the unit has an econ-
omizer installed.
Range = Disable/Enable
Default = Disable
System Space Temperature – The network space temperature
value that the controller is using for control (if applicable).
Range = N/A
Default = –999.0°F
System Space RH – The network relative humidity value that
the controller is using for control (if applicable).
Range = N/A
Default = –999.0%
System Space AQ – The network indoor air quality (CO
2
) val-
ue that the controller is using for control (if applicable)
Range = N/A
Default = –999.0 PPM
System Cool Demand Level – The system cool demand level
being received over the network.
Range = N/A
Default = 0 to 3
System Heat Demand Level – The system heat demand level
being received over the network.
Range = N/A
Default = –0 to 3
System Outdoor Air Temperature – Allows the outdoor air tem-
perature value to be network readable when enabled. Requires
RTU Open system to be equipped with an outdoor air temperature
sensor.
Range = N/A
Default = –999.0°F
System Outdoor AQ – Allows network readable value of
OAQ for calculation during differential OAQ CO
2
levels and
IAQ CO
2
levels to drive the IAQ control.
Range = N/A
Default = –999.0 PPM
System Fire/Smoke – Allows network readable fire/smoke
signal to invoke shutdown action in the RTU.
Range = N/A
Default = OFF
Indoor CO
2
Sensor Value @ Min mA – Sets the indoor CO
2
value when the board reads 4 mA at input 1 or 2.
Range = 0 to 9999 ppm
Default = 0 ppm
Indoor CO
2
Sensor Value @ Max mA – Sets the indoor CO
2
value when the board reads 20 mA at input 1 or 2.
Range = 0 to 9999 ppm
Default = 2000 ppm

Carrier RTU Open Specifications

General

Brand	Carrier
Model	RTU Open
Category	Controller
Language	English