Advanced Feature Summary - TCS UbiquiSTAT Product Manual

USER INTERFACE &

ADVANCED FEATURE SUMMARY

AIx Input Range (MSV-170 and AV-171): This sets the expected input range (sensor output) as either 0-20mA or
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4-20mA.
AIx Scaled Min (AV-161 and AV-163): This defi nes the sensor value when the output is at the minimum of the range
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(0 or 4 mA).
AIx Scaled Max (AV-162 and AV-164): This defi nes the sensor value when the output is at the maximum of the range
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(20 mA).
There are two other objects associated with the analog inputs:
AIx (AV-151 and AV-152): This is the raw input reading in milliamps.
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AIx Scaled (AV-181 and AV-182): This is the scaled representation in engineering units. The units property of this
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object is writable and can be written with the correct units for a more correct display on the status screens. This is
currently only editable via Ubiquity
5 Advanced Feature Summary
The following is a list of advanced features with a description for each:
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Setpoint Setback: The DI Setpoint Setback feature allows the user to setback the effective heat and cool setpoint val-
ues based on the state of a DI. This causes the controller to increase the cool setpoint and decrease the heat setpoint
by a predetermined amount and effectively create a setback response to an energy demand.
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Economizer:
reduces the need for mechanical cooling. This is also referred to as "free" cooling.
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Service Status: Service Status is defi ned as a state of the controller that requires action by the end user to resolve.
The possible status conditions consist of the following:
a. Discharge Limit Low: The Discharge Air Limit feature is enabled and the discharge air is below the low setpoint.
Cooling is disabled until discharge air exceeds the low limit setpoint.
b. Discharge Limit High: The Discharge Air Limit feature is enabled and the discharge air is above the high set
point. Heating is disabled until discharge air falls below the high limit setpoint.
c. Fan Proving Failure: The Fan Proving feature has detected a failure of the fan.
d. DI Service: The state of a Digital Input is monitored, and when the DI becomes active, the service alert is also
considered active. The message associated with this service is customizable by the user. If the controller has
more than one DI, each DI may be independently confi gured as DI Service with a unique message.
e. Check Filter: This is based on the state of a DI. It is a identical in function to the DI Service Status, but
uses a predetermined message rather than the customizable message.
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Fan Proving: The Fan Proving feature allows the controller to safely shut down the system in the case where the fan
fails to operate correctly, avoiding damage to the heating or cooling units. The input to this feature is an external sen-
sor that is connected to a Digital Input (DI) indicating that the fan is operating (closed) or not (open).
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External Time Clock: The user has the option of confi guring the TC relay output as an external time clock. In this
mode, the relay is confi gured as being active when the unit is occupied and inactive when the unit is unoccupied.
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Auto+Recirc: This fan mode allows the user to satisfy building air recirculation requirements without running the fan
continuously, therefore saving energy. The feature guarantees that the fan runs a certain percentage of time over a
given period (both programmable), even if the fan operation due to the normal calls for heat and cool is insuffi cient.
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Heating And Cooling Lockout: The Outdoor Air Lockout feature provides the ability to prevent (lockout) activation of
any heat stages or cool stages based on the current outdoor air temperature reading. This is useful when implement-
or a third party BACnet confi guration tool.
TM
The Economizer makes use of outdoor air to assist in cooling the space and therefore
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