TCS US4010 User manual

2800 Laura Ln, Middleton WI 53562 | 800.288.9383 Fax: [phone] | www.tcsbasys.com v.2106
UbiquiSTAT TM
BACnet® is a registered
trademark of ASHRAE.
Commercial BACnet Thermostat
Models:
US4010/US4110 - Single-Stage RTU / Zoning Thermostat
US4020/US4120 - Multi-Stage RTU Thermostat
US4040/US4140 - Advanced RTU Thermostat
US4050/US4150 - Advanced Application Thermostat
The UbiqiSTAT is a feature rich, multifunction
touchscreen thermostat which provides for
control of a wide range of HVAC applications.
This series provides a large color display, with
simple to understand control of conventional
and heat pump equipment as well as modu-
lating operation.
Mon Jun 7, 2021 09:20AM
|PRODUCT MANUAL

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TABLE OF CONTENTS
Manual Key
Caution: Requires special attention.
Note: Something you should know.
Model-Specic Icons: Denotes features available only on specic models. If no icons are shown, the feature applies
to all models.
US4010 US4020 US4040 US4050
The following symbols are used throughout this document. Their meanings are as follows:
US4110 US4120 US4140 US4150
Manual Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1 Mounting and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Remote Temperature Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.2 Remote Analog Sensor Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.3 Powering The Ubiquistat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3 Initial Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Room Temperature Sensor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.2 Additional Remote RTD Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.3 Analog Input (AI) Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.4 Digital Inputs (DI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.5 Digital Outputs (DO). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.6 Analog Outputs (AO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.7 On Screen Quick Start Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4 User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.2 Status Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.3 Service Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.4 About Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.5 Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
5 Advanced Feature Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 Checkout and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1 Checkout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
6.2 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
7 Using TCS Insight with the UbiquiSTAT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.1 Install the Insight Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
7.2 Connect to the Ubiquistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
7.3 Schedules and Holidays (and BACnet) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
7.4 Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
7.5 Backup/Restore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
8 Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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FEATURES
Feature / Model 4010/4110 4020/4120 4040/4140 4050/4150
Stage Conguration: Total stages #
[Heat # / Cool # / Congurable # (heat or cool] 2 [1/0/1] 6 [2/2/2] 6 [2/2/2] 6 [2/2/2]
Analog Inputs / Outputs (0-20mA or 4-20mA) 0/2 0/0 1/1 2/2
Mixed air on T1 (when using built-in temp sensor) - - a a
Model-Specic Features:
Features
• Powerful touchscreen user interface
⸰ Internal BACnet explorer
⸰Quick-start wizard
⸰System test screen for rapid commissioning
⸰Highly detailed status reporting and diagnostics
⸰Service status indication with custom messaging
⸰Calibration of temperature inputs
⸰4.3"color touchscreen
• Selectable BACnet or TCSbus communication
⸰ BACnet MS/TP or BACnet/IP
⸰ BACnet BTL Listed (B-ASC)
⸰Backward compatible with existing TCSbus networks
⸰All inputs/outputs fully commandable via network
• Full-featured BACnet scheduling (SCHED-I-B)
⸰5 Heat/Cool setpoint groups
• Includes all TCS SZ Series thermostat features
⸰ Includes many additional features and enhancements
• 4 temperature inputs (1 built-in, 3 remote)
⸰Outdoor, discharge, remote room
⸰ Congurable weighted averaging of built-in and
remote room
• Conventional or heat pump control
• Discharge setpoint reset on modulating heat/cool control
• Congurable Smart Recovery™
• Congurable P+I relay stage anticipator
• Setpoint setback based on DI
• Network upgradeable rmware
• Built-in equipment protection delays and sequencing
• Programmable fan control
⸰Auto/on/cool/recirculation modes for occupied and
unoccupied
⸰Adjustable recirculation
⸰Fan proving with automatic retries
• User management controls
⸰Occupancy override enable/disable
⸰Setpoint adjust range limit
⸰Optional access code locks out on-screen
programming
• Outdoor air heating and cooling lockouts
• Discharge air protection limits
• Fahrenheit or Celsius temperature display
• External time clock input/output
• Adjustable delay on power up and occupancy
• Stand-alone or network operation
• Backup & Restore of all settings (DM-BR-B)

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APPLICATIONS AND
PRODUCT DESCRIPTION
Applications
Common application set:
• Built-in application programming with simple conguration
• Advanced fan control
- Recirculation mode to meet minimum fresh air requirements
• Demand response setback
Door status response setback
Model-specic application set:
Feature / Model 4010/4110 4020/4120 4040/4140 4050/4150
Conventional staging:
heat / cool / selectable 1/0/1 2/2/2 2/2/2 2/2/2
Heat pump control: compressors / aux heat
- Emergency heat
- Cold climate automatic auxiliary heat switch-
over w/compressor lockout
1/1 2/2 2/2 2/2
Analog Inputs
CO²control - - a a
Dehumidication monitoring - - - -
Pressure monitoring - - - -
General purpose monitoring - - a a
Analog Outputs
Hot and chilled water valve control - - - a
Modulating zone damper control w/reheat a- - -
Economizer control - - a a
Demand ventilation (CO² control) - - a a
Digital or Analog heat/cool changeover control a- - a
Hot deck / Cold deck zone control a- - a
Mixing valve control - - - a
Product Description
The UbiquiSTAT product family is a feature rich, multi-purpose BACnet thermostat with a touchscreen interface. It can be
congured for conventional heating and cooling, heat pump, or modulating control applications; it has a number of heat/
cool setpoint groups and a number of output stages (specic to UbiquiSTAT model). It contains many standard features
from the TCS SZ series thermostats, as well as enhancements and new features. The UbiquiSTAT provides two network-
ing options: TCSbus and BACnet.

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MOUNTING AND ASSEMBLY
1 Mounting and Assembly
The UbiquiSTAT™ is designed for wall mounting using two #6 sheet metal screws, either over a 2"x4"or 4"x4"junction
box, or directly to the wall. For best results, the thermostat should be mounted on an interior wall that represents a normal
room environment, at a height of approximately 48" from the oor. For best temperature measurement accuracy, avoid ar-
eas exposed to direct sunlight, unusual heat or cool sources, open doors and windows, unventilated locations, and hot or
cold air from diffusers. If using a remote room sensor, the sensor should be mounted in the same manner. The thermostat
should be mounted in an area which is accessible for adjusting settings.
The UbiquiSTAT consists of a base containing wiring terminal blocks and relays and a front cover containing the touch-
screen and all other circuitry. Each base and cover pair is factory calibrated and serialized together. To remove the Ubiqu-
iSTAT cover, insert a small plastic pry tool or athead screwdriver between the front cover and base on the bottom of the
thermostat. Run the tool along the seam until the halves separate.
The following process ensures correct assembly when mating the front cover with the base. Check that no wiring inter-
feres with the cover, and no bare wires are exposed before assembly.

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WIRING
2 Wiring
The UbiquiSTAT uses standard terminal designations for wiring. See the wiring diagrams on the following pages that cor-
respond to your UbiquiSTAT model.
2.1 Remote Temperature Sensor Wiring
There are three remote sensor inputs (T1, T2, T3) with a range of -40F to 160F. These can be used for remote room sens-
ing, discharge air temperature, outdoor air temperature or mixed air temperature. See Sections 3.1 and 3.2 for information
on conguring temperature inputs.
Use 18 AWG shielded twisted-pair wire grounded at the sensor mounting location. Sensor wiring runs of 250 feet are at-
tainable if properly shielded wire is used and the installation environment is free of electrical noise. Sensor wire should be
kept at least ve feet away from line voltage wiring. The UbiquiSTAT accepts 2-wire platinum 1000 Ohm RTD temperature
sensors. TCS provides a wide assortment of temperature sensors. Consult www.tcsbasys.com for a full product listing.
When using remote sensors, the calibration may need to be adjusted. See Section 4.5.2.2 for more information.
2.2 Remote Analog Sensor Wiring
Depending on UbiquiSTAT model, there are up to two current sensing inputs (AI1, AI2) congurable as 0-20mA or 4-20mA
for connecting remote sensors. These inputs can be used for any current-based sensors such as CO² and humidity.
Use 18 AWG shielded twisted-pair wire grounded at the sensor mounting location. Sensor wire should be kept at least ve
feet away from line voltage wiring. TCS provides a wide assortment of 4-20mA sensors and transmitters. Consult www.
tcsbasys.com for a full product listing.
2.3 Powering The Ubiquistat
The UbiquiSTAT is powered from 24 VAC +15% / -5% and draws up to 10 VA.
Caution: Do not connect to 120 VAC. Doing so will damage the UbiquiSTAT.
The UbiquiSTAT may be powered from the unit transformer, however if the UbiquiSTAT is wired for communications, a
dedicated power source (transformer) will avoid any potential ground loop issues between equipment transformers.
Several thermostats may be powered from the same dedicated transformer, provided that the transformer has sufcient
power and the power polarity is maintained.
Caution: When multiple TCS Basys Controls devices are using a single transformer, the polarity of the power wir-
ing must be maintained or damage will occur. All TCS devices are half-wave rectied and have common return
paths.
When the UbiquiSTAT is used as a stand-alone thermostat without communications, the equipment transformer
may be used to power it. To do this, install a jumper between the “R” and “+24” terminals. The “24-” terminal must
then be connected to the common side of the equipment transformer.

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WIRING DIAGRAM (US4050)
US4050/US4150 Figure 1a
1For communication wiring, use 3-con-
ductor, twisted/shielded 22 AWG. 5For sensor input wiring, use 2-conductor, twisted/shielded 18 AWG.
2Control signals may be up to nominal
28 VAC from equipment transformer. 6GND terminal is used for self powered 4-20mA inputs and outputs.
324 VAC transformer. See powering
instructions 7
4-20mA transmitter, sensor input wiring 18
AWG, twisted, shielded pair. AI1 is shown as
Self-Powered sensor. This input can be used
for either 2-wire or self powered.
4Dry contact. Must not be powered. 8
600 ohm max load. Do not power actuator
with power from the thermostat. The ther-
mostats are half-wave rectied, whereby the
power ground is common with the signal
ground.

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WIRING DIAGRAM (US4040)
US4040/US4140
1For communication wiring, use 3-con-
ductor, twisted/shielded 22 AWG. 6GND terminal is used for self powered 4-20mA inputs and outputs.
2Control signals may be up to nominal
28 VAC from equipment transformer. 7
4-20mA transmitter, sensor input wiring 18
AWG, twisted, shielded pair. AI1 is shown as
Self-Powered sensor. This input can be used
for either 2-wire or self powered.
324 VAC transformer. See powering
instructions
8
4-20 mA output 600 ohm max. Do not power
actuator with power from the thermostat. The
thermostats are half-wave rectied, whereby
the power ground is common with the signal
ground.
4Dry contact. Must not be powered.
5For sensor input wiring, use 2-conduc-
tor, twisted/shielded 18 AWG. 9Unused terminal on this model.
Figure 1b

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WIRING DIAGRAM (US4020)
US4020/US4120 Figure 1c
1For communication wiring, use 3-con-
ductor, twisted/shielded 22 AWG. 4Dry contact. Must not be powered.
2Control signals may be up to nominal
28 VAC from equipment transformer. 5For sensor input wiring, use 2-conductor, twisted/shielded 18 AWG.
324 VAC transformer. See powering
instructions 9Unused terminal on this model.

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WIRING DIAGRAM (US4010)
US4010/US4110
Packaged Unit Terminations
1
2
3 4 4 4 5 5 5
6
99
Space/Return/
Mixed Air Temp
Discharge Air
Temp
Outside Air
Temp
Timeclock
Output
R W1 W2 Y1 Y2 G B/O TC AO1 AO2 GND
DI1 DI2 DI3 GND T1 T2 T3 +P AI1 AI2 GND
9
A
B
REF
REF B A
A BREF
+
24V
-
9
R W1 Y1/W2 G B/O
8 8
+ -+ -
Zone
Damper
HWV
or
CHWV
Optional 500ohm
resistor (included)
1For communication wiring, use 3-con-
ductor, twisted/shielded 22 AWG. 5For sensor input wiring, use 2-conductor, twisted/shielded 18 AWG.
2Control signals may be up to nominal
28 VAC from equipment transformer. 6GND terminal is used for self powered 4-20mA inputs and outputs.
324 VAC transformer. See powering
instructions
8
4-20 mA output 600 ohm max. Do not power
actuator with power from the thermostat. The
thermostats are half-wave rectied, whereby
the power ground is common with the signal
ground.
4Dry contact. Must not be powered.
9Unused terminal on this model.
Figure 1d

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INITIAL SETUP
3 Initial Setup
The UbiquiSTAT can be fully programmed through the touchscreen, TCS Insight or Ubiquity Cloud. The Quick Start Wizard
assists in rst-time setup (see Section 3.7), and the Settings screens can be used for additional setup. Advanced setup
can be done using the internal BACnet Explorer to edit the BACnet programming objects directly (see the BACnet Explorer
Guide for a list of all BACnet objects). TCS does not supply a BACnet conguration tool at this time, but any BACnet con-
guration tool an installer has access to can also be used to program the UbiquiSTAT.
3.1 Room Temperature Sensor Selection
By default, the UbiquiSTAT uses an internal temperature sensor. Optionally, remote temperature sensors can be wired
into the UbiquiSTAT. There are three room temperature sensor options: internal, remote, and an average of the two. Room
temperature selection is congured using the Room Temp Source screen (Home > Settings > Advanced > Room Temp
Source) (see Section 4.5.2.3).
Internal: This setting is the factory default.
Remote (T1): The room temperature is sourced from a sensor wired to the T1 input terminals.
Averaging: The room temperature is sourced from an average of the internal sensor and a sensor wired to the T1 input
terminals. The weight of the average is also congurable, and can be used to divide the input of each sensor equally.
• Single sensor on T1: weight the internal 50% and the external 50%.
• Two sensor temperature averaging kit: weight the internal 35% and the external 65%.
• Three sensor temperature averaging kit: weight the internal 25% and the external 75%.
To setup your interface navigate to: Home > Settings > Advanced > Room Temp Source.
3.2 Additional Remote RTD Sensors
• Discharge Air: Wire sensor to T2 (no further conguration necessary).
• Outdoor Air: Wire sensor to T3 (no further conguration necessary).
• Mixed Air: Wire sensor to T1 (only available when T1 is not used for room sensing). Requires advanced
conguration via the internal BACnet explorer (see Section 4.5.2.6).
3.3 Analog Input (AI) Sensors
Both AI1 and AI2 can be wired to accept any 0/4-20mA sensor input. Typically these are used to accept humidity, CO2,
and temperature sensors. These inputs require advanced conguration through the internal BACnet explorer (see Section
4.5.2.6). Analog input units display in percent of full scale by default.
3.4 Digital Inputs (DI)
There are three Digital Inputs; each may be congured in one of the following ways:
• Monitor Only
• Setpoint Setback
• Economizer Enable
• Service Status
• Filter Status
• Fan Proving
• Momentary Occupancy Override
• External Occupancy Override
• External Timeclock
• Aquastat

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INITIAL SETUP
These inputs must be congured using the corresponding mode objects in the internal BACnet explorer screen. See Sec-
tion 4.5.2.6 for more information on the internal BACnet explorer screen. For an explanation of the features listed above,
see Section 5.
3.5 Digital Outputs (DO)
The various control outputs required by heat and cool stage control are mapped to physical terminal blocks on the con-
troller via mechanical relays. The mapping depends on the mode of operation for the controller, and can even change
dynamically during normal operation in heat pump mode. The relays’ terminals are described by the color of wire that is
traditionally used for that control wire:
Figure 2
Terminal
Designator Color Function
R Red 24V HVAC Unit Power
W White Heat
Y Yellow Cool
G Green Fan
B/O Blue/Orange Reversing Valve
TC n/a Time Clock
Mapping is done as shown in the table below, based on system type (conventional or heat pump), and mode of operation.
If the fourth stage of heat or cool is desired in conventional mode, then the third stage must also be enabled.
Both of these stages are optional and must be congured using the internal BACnet Explorer.
Figure 3
Terminals (Relays) Conventional
US4010/US4110 Only
Conventional
(Fan Powered Box)
Heat Pump
(Normal)
Heat Pump
(Low Limit
Changeover)
Heat Pump
(Emergency
Heat)
W1 Heat 1 Heat 1 Heat 3 Heat 1 Heat 1
W2 * Heat 2 Heat 4 Heat 2 Heat 2
Y1 Cool 1 Heat 2 Heat 1/Cool 1 Cool 1
Y2 * Cool 2 Heat 2/Cool 2 Cool 2
GFan Fan Fan Fan Fan
B/O Heat/Cool 3, 4 * Reversing Valve Reversing Valve Reversing Valve
TC Heat/Cool 3, 4 *
*
Time Clock (TC): When used as a time clock output, this relay opens or closes based on the occupancy state. This relay
is isolated from other heating and cooling relays, which share a common connection with the R terminal. If this output is
used as a heating or cooling stage, the R terminal must be jumpered to one of the TC terminals. This is an open or close
relay that will support 24V.
Reversing Valve (B/O): When the UbiquiSTAT is in heat pump mode, the B/O terminal is used as a reversing valve output.
It may be congured as open or closed for cooling (the default is closed) via the polarity property. This can only be done
through communications. It cannot be changed from the keypad. If the UbiquiSTAT is congured as conventional, it may
be used as an additional heating or cooling stage.

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INITIAL SETUP
3.6 Analog Outputs (AO)
There are up to two analog outputs (depending on model), AO1 and AO2. Both may be congured in programming as
0-20mA or 4-20mA and direct or reverse acting. These settings are available via the touchscreen under Settings>Ad-
vanced>Analog Outputs.
• Direct Acting: The analog output increases as the input increases.
• Reverse Acting: The analog output decreases as the input increases.
• Output Range: Selectable as 0-20mA or 4-20mA.
The output can be converted to 0-10V or 2-10V by connecting the included 500 Ohm resistor between AO and
Ground terminal.
The factory defaults are direct acting and 4-20mA. Analog outputs can be congured for:
• Heat: If set for heating, the analog output operates when the room temperature is at or below the heating setpoint, where
4mA is maximum heat (valve open) and 20mA is minimum heat (value is closed), by default.
• Cool: If set for cooling, the analog output operates when the room temperature is at or above the cooling setpoint, where
4mA is minimum cooling (valve closed), and 20mA is maximum cooling (value is open), by default.
• Economizer: The analog output operates when the mixed or discharge temperature is at or above 55°F by
default, where 4mA is minimum cooling (damper is closed), and 20mA is maximum cooling (damper is open), by default.
By default, the economizer is enabled when the following conditions are met:
• Outdoor air is below 55F (free cooling available).
• Occupancy mode is occupied.
• Call for cooling is needed.
Economizer operation requires an outdoor air and discharge or mixed air input.
The following are additional features that can be programed using the internal BACnet explorer:
• Heat and Cool Aquastat
• Midpoint Control
• Demand Ventilation (CO2 Control)
• Pre-occupancy Purge
3.7 On Screen Quick Start Wizard
When rst powering on the UbiquiSTAT (or after a factory reset) a sequence of conguration screens will appear that must
be completed before the thermostat becomes operational. All thermostat control and communication are disabled until
the quick start wizard is complete.
Choose your desired settings for the following pages:
• Display Settings
• Date & Time
• Thermostat Type
• System Mode
• Occupied Fan Mode
• Communication Mode: TCSbus allows the UbiquiSTAT to reside on a network with TCS controllers. TCSbus mode re-
quires a software upgrade of the Ubiquity Site Gateway.
- US4100: TCSbus, BACnet MS/TP, BACnet/IP, None
- US4000: TCSbus, BACnet MS/TP, None
• Network Address: This must be unique for each controller on the RS-485 network (* Not shown if BACnet/IP was select-
ed). The valid address range is from 1-127. If an address of value 0 is desired this can be entered after the initial setup.

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USER INTERFACE
• Baud Rate: This defaults to 9,600 bps for TCSbus, and 38,400bps for BACnet MS/TP. All controllers on the network must
use the same baud rate (* Not shown if BACnet/IP was selected).
• Device Instance: This number must be unique across the entire BACnet network. The initial value shown is a combina-
tion of the TCS BACnet vendor ID (496) and the previously entered network address. This is done in an attempt to create
a unique value. However, users are encouraged to create their own numbering system for all controllers on the BACnet
network (* If BACnet/IP was selected, no initial value is populated in this eld).
• Wi-Fi Scan Screen: If BACnet/IP was selected, this screen will show all Wi-Fi networks in range. Click Connect on the
network you wish to use.
4 User Interface
4.1 Home Screen
The home screen provides at-a-glance system information and basic user controls. The navigation automatically returns
to the home screen and the display dims after 10 minutes of inactivity (no touches detected). The basic components of
the home screen are shown below..
Figure 4
1. Room Temp and Setpoints: The room temperature is rounded to the nearest whole number. The currently active heat
and cool setpoints are temporarily shown in place of the room temperature when using the up/down arrows or when
the temperature value is touched. The up/down arrow raise and lower the heat and cool setpoints (User Setpoint Ad-
just) together to maintain the dead band. The up/down arrows change color (blue for cooler, orange for warmer) when
a user setpoint adjustment is active.
2. Fan Status :This symbol is animated when the system calls for fan. Touching this symbol displays additional
information including the fan mode.
3. System State: This indicates the present operation of the controller. Touching this symbol displays additional informa-
tion including the Active System Mode (MSV-1005) and whether it is currently overridden by the network. The system
states that may be displayed on the home screen include:
a. Flame : Heating is active.
b. Snowake : Cooling is active.

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USER INTERFACE
c. Idle : Neither heating nor cooling is active.
d. Warning : Heating or cooling lockout in effect. See Section 5 for more information on this feature.
e. Disabled : The control is currently disabled and not heating or cooling. This is typically shown on startup during
the power on delay, or when fan proving has failed.
4. Occupancy State: This button indicates the current occupancy state as being occupied or unoccupied .
Touching this button overrides the occupancy state (switches between occupied/unoccupied) for three hours, or until
a schedule change. The time when the override will expire is shown on the button. Touching and holding the occupan-
cy state button until the border changes (about 5 seconds), causes the override to hold until the next change in sched-
ule. Whenever the occupancy state is overridden, touching the Occupancy State button again cancels the override.
The following BACnet objects congure the use of this button:
• Occupancy Override Mode: MSV-701
• Occupancy State Override Time: PIV-703
5. DI Setpoint Setback Active Indicator : This symbol is visible when DI Setpoint Setback is active. Touching this
symbol displays a brief explanation of the feature. See Section 5 for an explanation of this feature.
6. Info Text: This two line text eld may be written from the network, and can be useful for showing additional informa-
tion such as the current weather. If not being written from the network, the outdoor air temperature is visible whenever
a sensor is physically connected, or when the thermostat is receiving a valid outdoor temperature reading. Info text
can be customized via CSV-506.
7. Display Banner: The display banner contains the current date and time, and may contain the device name. The device
name is typically used describe what area or unit the thermostat is controlling. The device name can only be changed
using Ubiquity Cloud or an external BACnet conguration tool . The time can be set to display in a 12 hour or 24 hour
format using the Date/Time screen in the Advanced Settings menu. The contents of the banner can be customized
using MSV-505.
8. Economizer : This symbol is visible when the Economizer is active. Touching this symbol provides
a brief explanation of this feature. See Section 5 for an explanation of this feature.
9. Service Status Indicator : This symbol is visible only when one or more service status is active. Touching this
symbol navigates to the service status screen where any active service status is viewable. When there are more than
one service status active, a plus sign next to the symbol. See Section 4.3 for more information on service status.
10. Settings: Touching this button navigates to the Settings menu. If an access code has been set, the user will be
prompted to enter the code before they are permitted to proceed to the Settings screens. See Section 4.5 for more
information on Setting screens. All programming is done on these screens.
11. Status: Touching this button navigates to the Status screens. See Section 4.2 for more information on the Status
screens.
Touching and holding the Status button for 5 seconds brings up a dialog asking the user if they would like to
force a device restart. If conrmed, the UbiquiSTAT immediately restarts.
12. About: Touching this button navigates to the About screen. This screen shows product information, such as version-
ing and serial number. See Section 4.4 for more information about the About screen.
4.2 Status Screens
Touching the Status button on the home screen will bring up the Status screens (see Figure 5). These screens display real
time information about the state of the control as well as inputs and outputs. This information is grouped into three sub
screens: system, advanced, and network.

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USER INTERFACE
4.2.1 System Status
System Status screen details vary pending on model-specic features.
Information on the system status screen is broken into three groups:
• System (top)
- State: The current system state. This is the same as the system state shown on the home screen.
- Schedule: The currently active setpoint pair.
- Next Schedule: The next change in schedule as well as the time that it will occur. Only schedule changes less than 24
hours away are shown.
- Cool and Heat Setpoints: The setpoints currently in use by the thermostat.
- Service Status: This button displays the number of currently active Service Statuses. If there are no active Service
Statuses, the button reads “OK” and is disabled. Touching this button navigates to the Services Status screen, (same
as touching service symbol on home screen) where any active Service Statuses are viewable.
• Inputs: These are the primary control points, shown with the same precision used by the controller. This is useful when
the rounding shown on the home screen is insufcient to explain the control behavior. When an input value is not avail-
able (not congured or no sensor connected), dashes are displayed. The following inputs are shown:
- Room Temperature: The temperature of the space (zone) being controlled.
- Outside Temperature: The temperature of the outside air sensor.
- Discharge Temperature: The temperature of the discharge air sensor.
- Mixed Temperature: The temperature of the mixed air sensor.
- Humidity: The percent relative humidity (% RH) of the space.
- CO²: The carbon dioxide content (parts per million) of the space.
• Relay Outputs: The contents depend on the programed thermostat type.
- Conventional: Each available heat and cool stage is shown. Additional stages (use of TC and B/O relays for 3rd and
4th stages) become visible when congured as available stages. The status of the fan is included. The status of each
output is shown with an indicator light and state text. The table below shows the meaning of the symbols.
- Heat Pump: The reversing valve relay (B/O) has an indicator light next to it that is always lit: red when heating, and blue
when cooling, this is also shown in the text. Two compressor stages and two auxiliary heat stages are displayed along
with the fan status. The status of each output is shown with an indicator light and state text. The table below shows
the meaning of the state text.
Figure 5

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USER INTERFACE
Figure 6
Relay State On Off Disabled
Low Limit
Changeover (Heat
Pump Compressors)
Network Override
Indicator Light Lit Not Lit Hidden Not Lit Same as On/Off
Text “ON” “OFF” “--” (Protect) “(ON!)” / “(OFF!)”
4.2.2 Advanced Status
Figure 7
Advanced Status screen details vary pending on model specic features.
Information on the advanced status screen is broken into four groups:
• Operating Modes:
- Type: The programmed thermostat type (conventional or heat pump).
- System: Active System Mode (MSV-1005). If this value is being overridden from the network, an exclamation point (!)
is visible after the mode text (i.e. - System: Auto!)
- Fan: The active fan mode.
• Digital Inputs: The status of each Digital Input is shown with both an indicator light and text. Additionally, the pro-
grammed mode of the Digital Input is shown next to the status text.
• Economizer:
- Enabled: Indicates whether the economizer is currently allowed to modulate open. This depends on the occupancy
state, whether free cooling is available, and if cooling is needed.
- Free Cooling: Indicates when the economizer feature determines that free cooling is available. This depends on the
programed economizer mode. For example, in dry bulb setpoint mode, free cooling is indicated as available when the
outside air temperature is below the economizer dry bulb setpoint.
- Freeze Protect: Indicates that the outside air damper is being modulated closed in order to protect equipment from
freezing.
• Analog Inputs & Outputs: (model specic)
- Analog Inputs: Two values are shown for each of the analog inputs. The value on the left shows the reading in
milliamps, while the value on the right shows the input scaled to engineering units.
- Analog Outputs: Two values are shown for each of the analog outputs. The value on the left shows the output in
milliamps, while the value on the right shows the output as a percent of full range. Additionally, the mode of the analog
output is shown next to the percentage.
Operating Modes

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USER INTERFACE
4.2.3 Network Status
Figure 8a - RS-485 Figure 8b - Wi-Fi
Information on the advanced status screen is broken into four groups:
• RS-485 Settings:
- Mode: This indicates the programmed network mode (TCSbus or BACnet MS/TP).
- Device ID: The programmed device instance number. Device instance numbers are specic to BACnet MS/TP and are
not used in the TCSbus protocol.
- Name: The programed device name.
- Address: The programmed device address.
- Baud Rate: The programmed device baud rate.
• Wi-Fi Settings:
- Mode: Always BACnet IP
- Device ID: The programmed device instance number for BACnet network.
- Name: The programed device name.
- Port: UDP used for BACnet communication.
• RS-485 or Wi-Fi Status:
- Link: Indicates the overall status of the network connection. This consists of both an indicator light and associated
text. Touching the text brings up a dialog box with additional status information. The following states may be shown:
⸰ Connected (Green): The UbiquiSTAT has detected a valid network connection. For BACnet MS/TP, this means that the
device has successfully joined the token ring. For TCSbus, this means the device has received a valid message from
the network.
⸰ Troubleshoot (Yellow): The UbiquiSTAT is able to communicate, but is detecting problems with the network that may
cause the communication to be unreliable. Check the RS-485 wiring and network conguration on other devices.
⸰ Disconnected (Red): The UbiquiSTAT has not detected a valid network connection. For BACnet MS/TP this means the
device has not joined the token ring. For TCSbus this means the device has not received a valid message from the
network.
- Activity: There are two indicator lights; one for data received (Rx), and one for data transmitted (Tx). These lights blink
whenever data is received or transmitted to or from the device respectively. They are useful as a basic diagnostic in
determining whether data is owing across the network.
- Rx Trafc: This is a statistic that indicates how much network trafc has been received by the UbiquiSTAT. Shown
are both the number of messages and the total number of bytes. This number should be increase whenever the
thermostat is monitored or programed via the network (Gateway and/or Ubiquity Cloud).
- Tx Trafc: This is a statistic that indicates how much network trafc has been transmitted by the UbiquiSTAT. Shown
are both the number of messages and the total number of bytes. This number should be increase whenever the
thermostat is monitored or programed via the network (Gateway and/or Ubiquity Cloud).
- Last Trafc: This shows the time stamp of the last time network trafc was received by the UbiquiSTAT.

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USER INTERFACE
- Clear: This button clears the network trafc statistics. This includes: Rx Trafc, Tx Trafc, and Last Trafc.
• Other:
- USB Activity: This indicator light is lit whenever there is trafc detected on the USB port.
- Network Override: This indicator light is lit whenever any of the BACnet objects are being commanded remotely from
the network. This occurs, for example, whenever a sub system is implemented for the network through Ubiquity Cloud.
The internal BACnet explorer screen can be used to determine precisely which BACnet object(s) is/are being externally
commanded (see Section 4.5.2.6).
4.3 Service Status
Service Status is dened as a state of the controller or HVAC equipment that requires action by the end user to resolve.
When a service status is active, a red badge is visible on the top of the home screen to the right of the TCS logo. Touching
this badge presents the service status viewer, which shows all active service statuses and when they were detected. The
UbiquiSTAT may be congured to report the following service conditions:
• Fan Proving Failure: When a DI is congured for Fan Proving, the system will shut down if the fan is not detected as oper-
ational after a call from the controller. More information on this feature can be found in Section 5. The fan proving status
can be reset from the service status screen, thereby re-enabling system control.
• Check Filter: When a DI is congured for Check Filter, service status will indicate the need to replace the air lter. The
Check Filter status is present whenever the DI is active, and is absent when the DI is inactive. This status is automatical-
ly cleared when the lter is changed and the status becomes inactive.
• Discharge High: When the discharge temperature exceeds the high limit value, the heat control is shut down until the
condition no longer exists.
• Discharge Low: When the discharge temperature drops below the low limit value, the cool control is shut down until the
condition no longer exists.
• DI1 - DI3: When a DI is congured for reporting service status, it indicates when the DI is active. A text message can be
customized for each DI.
4.4 About Screen
This screen shows basic information about the UbiquiSTAT including:
• Model
• Device Name
• Device ID
• Serial Number
• Firmware Version
• Hardware Version
4.5 Settings
4.5.1 Basic Settings
4.5.1.1 Fan mode
The fan mode may be set differently for occupied vs. unoccupied occupancy modes. There are four fan modes that may
be selected:
• On: The fan runs continuously.
• Auto: The fan runs only when there is a call for heat or cool.
• Cool: The fan runs only when there is a call for cool (available only when thermostat type is conventional).
• Auto + Recirc: The same as auto but with additional run time if necessary to satisfy minimum air circulation require-
ments (see Section 5 for more information).

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USER INTERFACE
4.5.1.2 Setpoints
There are four occupied heating and cooling setpoint pairs and one unoccupied setpoint pair. The pair is in effect when
the corresponding schedule is active. A minimum dead band of one degree between heat and cool setpoints is enforced,
however, a dead band of at least two degrees is recommended.
4.5.1.3 Date and Time
Set the date and time to ensure correct scheduling.
4.5.1.4 System Mode
There are six system modes:
• Off: All relays and analog outputs are set to their inactive state; no control is performed.
• Auto: Controls both heating and cooling.
• Heat: Controls only heating.
• Cool: Controls only cooling.
• Off+Recirc: Same as Off but with fan recirc enabled.
• Emergency Heat: Controls only auxiliary heating (heat pump only)
The system mode setting screen edits the BACnet object System Mode (MSV-1000). This value is automatically reected
by the control in the BACnet object Active System Mode (MSV-1005) at priority 16. If the Active System Mode is currently
commanded from the network (at a priority higher than 16), a warning is shown when entering the screen and any chang-
es made will cancel the network override.
4.5.1.5 Schedule
There are four occupied weekly setpoint pairs (A,B,C,D), one unoccupied setpoint pair, and holidays that may be sched-
uled. Weekly schedules are created using setpoint pairs and start times. Each setpoint pair can be used multiple times to
create up to eight schedule changes per day. At midnight each day the system automatically transitions to unoccupied,
which uses the unoccupied heating and cooling setpoints. If no schedule changes are set for a particular day, the Ubiqu-
iSTAT will be unoccupied for that entire day. If a schedule requires an occupied setpoint at midnight a schedule change
must be created for midnight (12:00 AM) in order to defeat the default behavior. Holiday schedules are available with
thirty (30) entries. Select new and choose month, day and year for a single occurrence where the system will revet to the
unoccupied mode.
Different from SZ Series Thermostats: Schedules no longer start and stop as they did on TCS SZ thermostats.
Schedules now only transition from schedule to schedule.
The examples below assume the following setpoints:
• Occupied A: heat=70, cool=75 (best suited for customer comfort in a store)
• Occupied B: heat=65, cool=80 (best suited for after-hours employee work in store)
• Unoccupied: heat=60, cool=80 (most economical when building is unoccupied)
Normal Schedule Example: This schedule represents a business that opens at 8:00AM and closes at 5:00 PM weekdays.
By default each day begins as Unoccupied at 12:00 AM.
Figure 9
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Occupied A @
8:00 AM
Occupied A @
8:00 AM
Occupied A @
8:00 AM
Occupied A @
8:00 AM
Occupied A @
8:00 AM
Unoccupied @
5:00 PM
Unoccupied @
5:00 PM
Unoccupied @
5:00 PM
Unoccupied @
5:00 PM
Unoccupied @
5:00 PM
12:00 AM Monday (midnight): The automatic transition to Unoccupied has no effect because the system was already
Unoccupied.