Advanced Feature Summary - TCS UbiquiSTAT US4010 Product Manual

ADVANCED FEATURE SUMMARY

4.5.2.12 Expert Settings
By default, the UbiquiSTAT ships with two stages of heat and two stages of cool enabled (based on model feature avail-
ability). Each stage may be independently disabled in order to prevent it from being considered by the control logic. This
can be useful if, for example, the connected equipment does not support the stages, or to correct for a wiring error.
Stages can be enabled and disabled using the internal BACnet explorer screen. Each stage has an object that can be con-
figured to enable or disable the given stage. See the
4.5.2.13 Configuring Additional Stages
When configured as a conventional thermostat type, the B/O and TC relays may be used as third and/or fourth stages of
heating and/or cooling (based on model feature availability). In order to make these relays available as additional stages,
the corresponding relay mode object must be configured appropriately. For example, to configure the B/O relay as a third
stage of heat, configure the "B/O Mode" (MSV-316) to the value "Heat Stage 3".
4.5.2.14 Configuring Analog Input Scaling
The analog inputs (AI1 and AI2) always measure a signal in milliamps. The raw milliamp reading can be scaled into any
units desired in order to properly reflect the sensor measurement (engineering units). The scaling is configured inde-
pendently for each analog input using the following BACnet objects (AIx represents AI1 or AI2):
• AIx Input Range (MSV-170 and AV-171): This sets the expected input range (sensor output) as either 0-20mA or 4-20mA.
• AIx Scaled Min (AV-161 and AV-163): This defines the sensor value when the output is at the minimum of the range (0 or
4 mA).
• AIx Scaled Max (AV-162 and AV-164): This defines the sensor value when the output is at the maximum of the range (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.
• AIx Scaled (AV-181 and AV-182): This is the scaled representation in engineering units. The units property of this 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 Cloud or a third party BACnet configuration tool.
5 Advanced Feature Summary
The following is a list of advanced features with a description for each:
• Setpoint Setback: The DI Setpoint Setback feature allows the user to setback the effective heat and cool setpoint values
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.
• Economizer:
duces the need for mechanical cooling. This is also referred to as "free" cooling.
Service Status: Service Status is defined 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. Cool-
ing 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 consid-
ered 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 configured 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 predeter-
mined message rather than the customizable message.
BACnet Explorer Guide
The Economizer makes use of outdoor air to assist in cooling the space and therefore re-
2800 Laura Ln, Middleton WI 53562 | 800.288.9383 Fax: 608.836.9044 | www.tcsbasys.com
for a list of all BACnet objects.
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