CaptiveAire RTULink, Installation, Operation And Maintenance Manual

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39
Monitoring Sensors
Configure Stats
Space Air Stat
– If a space air stat is used, this option should be set to Yes.
Return Air Stat
– If a return air stat is used, this option should be set to Yes.
Discharge Stat
– If a discharge stat is used, this option should be set to Yes.
Mixed Air Stat
– If a mixed air stat is used, this option should be set to Yes.
Outside Stat
– If an outside air stat is used, this option should be set to Yes.
Configure Alarms
– Set alarms to operate on Normally Open, Normally Closed, or Unused.
0-10V Inputs
RTU #1
– None, Outside Air RH, Return RH, Supply RH, Mixed RH, Space RH, CO2, Current 1,
Current 2, Current 3.
Stat #1
– None, Outside Air RH, Return RH, Supply RH, Mixed RH, Space RH, CO2, Current 1,
Current 2, Current 3.
Stat #2
– None, Outside Air RH, Return RH, Supply RH, Mixed RH, Space RH, CO2, Current 1,
Current 2, Current 3.
Currnt 1: Amps/V; Currnt 2: Amps/V; Currnt 3: Amps/V
– The Current 1, 2, and 3 Amps/V
settings are what allows the voltage signal that the current transducer outputs to be converted to
Amps. View the current transducer documentation to determine the amperage per volt supplied by
the current transducer.
Outdoor Air Config
0-10V Damper
– When set to OFF, no output to the damper from the RTULink board. When set
to ON, an output signal is sent from the RTULink board to the damper.
Min OA Damper
– The minimum percentage the outdoor damper will operate.
Economizer
Type
– Available options are Enthalphy, Dry Bulb, None. If Enthalpy is selected,
temperature and humidity will be used to control the economizer. If Dry Bulb is selected,
the temperature will be used to control the economizer. Select None if an economizer is
not equipped on the unit.
Econ Cool Disbl
– Economizer cool disable is the percentage open the economizer/OA
damper must be for mechanical cooling to be disabled.
Allow Economizer
– This feature enables and disables the use of the economizer. This
feature is useful when disabling the economizer during the test and balance of a building.
Disabling the economizer through this parameter will save the economizer settings
instead of setting them back to defaults.
Use Diff Econ
– This parameter determines whether or not to use fixed or differential
enthalpy. If this parameter is set to On, then differential economizer logic will be used, if
this parameter is set to Off, then fixed economizer logic will be used.
CO2 OA DCV
– Carbon dioxide based demand control ventilation (DCV) strategy will allow a
reduction of OA when space CO
2
levels are below a threshold. This feature requires a CO
2
sensor to be installed in a space or return that will accurately measure the CO
2
levels of the
space supplied by the unit and it requires the outside air damper to be controlled by the RTULink.
The intent of this feature is to reduce energy consumption by reducing the outside air load on the
space when possible.
CO2 OA Thresh
– Carbon dioxide based threshold is the value in parts per million (ppm) that the
CO
2
levels can reach before forcing the units outside air damper is forced to fully open. This
parameter is only relevant if the CO
2
OA DCV option is enabled.