Observer TSTAT0201CW User manual

616 01 1019 00 10/17/14
Communicating Wall Control
With Wi--FiRCapability
Installation Manual
TSTAT0201CW
U.S. Patent No. 7,243,004
U.S. Patent No. 7,775,452
COMMUNICATING SYSTEM
R
All trademarks are the property of the respective owners.
Wi-Fi®is a registered trademark of the Wi-Fi Alliance Corporation.

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Safety Considerations 6...............................
Introduction 7.........................................
Quick Start 9.........................................
Set Day and Time 9.................................
Set Schedule for All Days 11.........................
Installation 14........................................
Overview 14.......................................
Check Equipment 15................................
Location 15........................................
Wall Control 15..................................
Remote Room Sensors 16........................
Wiring Considerations 17............................
Shielded Wire 19.................................
Non-communicating equipment 19.................
Mounting 19.......................................
Humidifier Connection 21............................
Bypass Humidifiers 21............................
Fan Powered Humidifiers 21.......................
Commissioning 22....................................
Communicating System Overview 22..................
Selecting Accessories 24............................
Selecting Indoor Unit 24.............................
Equipment Summary 26.............................
Brand Selection 26.................................
Current Software Version 27.........................
Software Updates 27................................
Setting Up Remote Access and Wi-Fi® Connection 28..

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Install/Service Menus – Communicating and
Non-Communicating Mode 30..........................
Equipment Summary Menu 31.......................
Service Menus 32..................................
Status 32........................................
Heat Stage (Furnace) 32........................
Electric Heat (Fan Coil) 32......................
Airflow CFM 32................................
Inducer RPM (Modulating furnaces only) 32.......
Blower RPM (Modulating furnaces only) 33........
Lockout Timer 33..............................
Heat Pump/AC Status 33.......................
Stage: (Heat/Cool) 33..........................
Defrost 33....................................
Outdoor Coil Temp 33..........................
Last 10 System Faults 33.........................
Lifetime Run History 34...........................
Cycle Counters 34................................
Run Timers 34...................................
Filter Reminder 26................................
Auto Mode Enable 36...............................
Room Temperature Sensing 37......................
Reversing Valve 38.................................
English/Metric Display 39............................
FanonwithW 40...................................
Cooling Lockout 41.................................
Auxiliary Heat Lockout 42............................
Heat Pump Lockout 43..............................

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Minimum Cooling Setpoint 44........................
Maximum Heating Setpoint 45........................
Outdoor Air Temperature Offset 46...................
Room Air Temperature Offset 47.....................
Smart Recovery 48.................................
Setpoint Deadband 49..............................
Cycles Per Hour 50.................................
Auto Changeover Timer 51..........................
Time Between Fuel Types 52........................
Humidity Offset 53..................................
Programming On/Off 54.............................
Reset to Factory Defaults 55.........................
Dealer Info 56......................................
Service Reminder 57................................
Install/Service Menus - Communicating Equipment 57.....
Setup Menu 57.....................................
English/Metric Display 58.......................
Airflow 59.......................................
Heating Airflow 59.............................
Furnace / Fancoil Heating Airflow 59.............
Heat Pump Heating Airflow 60...................
Cooling Airflow 60.............................
Dehum Airflow 60..............................
Furnace Airflow (Capacity) Limiting 61............
Dehum Drain 61...............................
Off Delay 61..................................
Low Heat Rise 62..............................
Defrost Interval 63.............................

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Defrost With Furnace 64........................
Quiet Shift 64.................................
Zones 65.....................................
Zone Weighting 66.............................
Zone Airflow Control 67.........................
Bypass 68....................................
Airflow Capacity 68............................
Damper Type 69...............................
Leaving Air Sensor (LAS) 70.......................
Disable Zoning 70................................
Damper Timing 71................................
HRV - Heat Recovery Maintenance 71..............
Daughter Board 72...............................
Operational Information 73........................
Auto Mode 73....................................
Setpoint Deadband 73..........................
Offsets 73....................................
Cycles Per Hour 73............................
Programming 74.................................
Smart Recovery 74...............................
Appendix – Wiring Diagrams 75.........................

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Safety Considerations
Improper installation, adjustment, alteration, service, main-
tenance, or use can cause explosion, fire, electrical shock, or
other conditions which may cause death, personal injury or
property damage. Consult a qualified installer, service
agency or your distributor or branch for information or assist-
ance. The qualified installer or agency must use factory-au-
thorized kits or accessories when modifying this product.
Refer to the individual instructions packaged with the kits or
accessories when installing.
Follow all safety codes. Wear safety glasses, protective
clothing, and work gloves. Have a fire extinguisher available.
Read these instructions thoroughly and follow all warnings
and cautions included in literature and attached to the unit.
Consult local building codes and the current edition of the
National Electrical Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Elec-
trical Code CSA C22.1.
Recognize safety information. When you see this symbol
on the unit and in instructions or manuals, be alert to the
potential for personal injury. Understand these signal words:
DANGER, WARNING, and CAUTION. These words are
used with the safety-alert symbol. DANGER identifies the
most serious hazards which will result in severe personal
injury or death. WARNING signifies hazards which could
result in personal injury or death. CAUTION is used to
identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to

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highlight suggestions which will result in enhanced
installation, reliability, or operation.
Introduction
The Observer® communicating system consists of several
intelligent communicating components which includes the
Observer® Wall Control, and Observer System HVAC
equipment such as, variable speed furnace or fan coil,
2-stage AC or HP, which continually communicate with each
other via a four-wire communication bus. Commands, oper-
ating conditions, and other data are passed continually
between components over the communication bus. The res-
ult is an enhanced level of comfort, versatility, and simplicity.
All communicating furnaces or fan coils are variable-speed
and multi-stage for maximum flexibility, efficiency, and com-
fort. They support controlled humidification, dehumidification,
and air quality control. Either an Observer communicating, or
a standard 24VAC controlled outdoor unit may be used.
When using conventional, single-stage outdoor units, the
communicating furnace (single-stage AC unit), or fan coil
(single-stage HP) provides the 24 volt signals needed to con-
trol them. Add the accessory daughter board to the system
to control other types of conventional outdoor units. All sys-
tem components are controlled through the wall mounted
Observer Control, which replaces the conventional thermo-
stat and provides the homeowner with a single wall control
for all features of the system.
The Observer Communicating Control with Wi-FiRnetwork
compatibility allows connection of this system to the Internet
viaahomeWi-FiRnetwork. See the Owner's Manual for
information on connecting the wall control to the home Wi-Fi

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network, and the MyObserverComfort web server. See later
in these Installation Instructions for information on applying
the accessory NAXA00101WA wireless access point, if the
existing home network is incompatible with this product.
The ability to remotely access and adjust the settings of
the Observer® wall control with the MyObserverComfort
web and mobile applications is dependent on the com-
patibility of the user’s computer/network or mobile de-
vice, the Observer wall control, and/or the MyObserver-
Comfort web server with, and the availability of, the
user’s Internet service provider or mobile device carrier
service. International Comfort Products makes no repre-
sentations or warranties, express or implied, including,
to the extent permitted by applicable law, any implied
warranty of merchantability or fitness for a particular
purpose or use, about the compatibility of the user’s
computer/network, or mobile device, with the Observer
wall control, and/or the MyObserverComfort web server,
with,andtheavailabilityof,theuser’sInternetservice
provider or mobile device carrier service, or that the
ability to remotely access and adjust the settings of the
Observer wall control will not be negatively affected by
the network-related modifications, upgrades, or similar
activity of the user’s Internet service provider or mobile
device carrier service.

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Quick Start
For first time installers, Quick Start will allow a quick start up
of the Observer® Control before learning all the details of
system operation. However, for the best possible comfort
and operation refer to the Owner’s Manual.
Set Day and Time
To set the current time and date, press SETUP;thenpress
TIME/DATE.

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A14558
Under date, you can select the month, day, or year buttons;
then use the ▲and ▼to select the appropriate date. . Un-
der time, you can select the hour, minute, and am/pm; then
use the ▲and ▼to select the appropriate time. You also
have the option of selecting between a 12 HR or 24 HR clock
format. Finally, you can choose whether you observe day
light savings time by pressing the ON or OFF button. Press

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DONE to save and exit the information that you have
entered.
Set Schedule for All Days
The Observer® Control gives you flexibility in how to create
a comfort schedule. You can choose one schedule for all
days; create a schedule for your work week and the week-
end; or you can make every day different.
You can create on schedule for all seven days in the week.
1. Press SETUP,thenSCHEDULE

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2. Press ▲under “All Days”, then press EDIT.

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3. Press PERIOD;thenusethe▲or ▼to select the period to
change.
4. Press START;thenusethe▲or ▼to change the time the
corresponding period starts.
5. Press HEAT TO;thenusethe▲or ▼to change the desired
heating temperature for that period.

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6. Press COOL TO;thenusethe▲or ▼to change the desired
heating temperature for that period.
7. Press DONE after you have completed your edits.
8. Press SAVE to save your new schedule and exit (or press
CANCEL to exit without saving.)
NOTE: See Owners manual for further details of setting up
schedules.
Installation
Overview
This instruction covers installation of the Observer® Control
only. Physical installation instructions for the indoor and out-
door equipment and accessories are provided with each unit.
Setup, commissioning, operation, and troubleshooting of the
communicating system are covered only in this installation
instruction. It is the guide to connecting the system compon-
ents and commissioning the system once all physical com-
ponents are installed. Special screen prompts and start-up
capabilities are provided in the communicating system to
simplify and automate the initial commissioning of the sys-
tem.
SInstall Observer Control according to this instruction.
SInstall indoor unit, outdoor unit, and accessories ac-
cording to their instructions.
SWire complete system according to this instruction.
SSetup, commission, and operate system according
tothisinstructiontoassureasmoothandtrouble
free start--up.

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Check Equipment
Inspect equipment. File claim with shipping company prior to
installation if shipment is damaged or incomplete.
Location
All wiring must comply with national, local, and state codes.
Wall Control
The Observer® Control is the command center for the com-
municating system. It should be located where it is easily
accessible and visible to the adult homeowner or end user.
For accurate temperature measurement, the following
guidelines should be followed:
The Observer Control and Room Sensors SHOULD be
mounted:
Approximately 5-ft (1.5 m) from the floor.
Close to or in a frequently used room, preferably on an inside
partitioning wall.
On a section of wall without pipes or ductwork.
The Observer Control and Room Sensors SHOULD NOT be
mounted:
Close to a window, on an outside wall, or next to a door lead-
ingtotheoutside.
Exposed to direct light or heat from a lamp, sun, fireplace, or
other temperature-radiating objects which could cause a false
reading.
Close to or in direct airflow from supply registers.
In areas with poor air circulation, such as behind a door or in
an alcove.

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Remote Room Sensors
(for non-zoned system)
A Remote Room Sensor (Part No. SYSTXIIRRS01) can be
used with the Observer® Control to take the place of the
control’s internal temperature sensor (This sensor is NOT
the same as the Zone Temperature Sensor, even though the
part numbers are similar). This allows the Observer Control
to be mounted in areas with less than optimal airflow (such
as near an exterior door, window or in a closet). The remote
sensor can be wired to the terminal block connectors labeled
S1 and S2 at the control’s back-plate. The Observer Control
will automatically detect the Remote Room Sensor and ig-
nore its internal temperature sensor. Typically, one remote
sensor is used but, multiple sensors may be used and aver-
aged in some applications. Averaging requires a special
series-parallel wiring method with a specific number of
sensors. See Fig. 1. It is also important to note the humidity
sensor cannot be remotely located, so do not locate the Ob-
server Control in an area where humidity sensing may not be
accurate.
Fig. 1 – Remote Room Sensor – Parallel Wiring

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Wiring Considerations
Ordinary thermostat wire is recommended. Use 22 AWG or
larger for normal wiring applications. Continuous wire lengths
over 100 ft. should use 20 AWG or larger.
NOTE: The communicating bus wiring only requires a
four-wire connection; however, it is good practice to run ther-
mostat cable having more than four wires in the event of a
damaged or broken wire during installation.
Each communicating device in the system has a four-pin
connector. It is recommended that the following color code
be used when wiring each device:
DX+ — Green = Data A
DX- — Yellow = Data B
C — White = 24VAC (Com)
R — Red = 24VAC (Hot)
NOTE: TERMINAL MARKINGS FOR EACH COMMUNICAT-
ING SYSTEM COMPONENT MAY NOT BE IN THE SAME
ORDER. IT IS NOT MANDATORY THAT THE ABOVE COL-
OR CODE BE USED, BUT EACH CONNECTOR IN THE
SYSTEM MUST BE WIRED CONSISTENTLY.
A separate four-pin connector comes inside packaging and
should be used when connecting to furnace (or fan coil). En-
sure connector is inserted properly into circuit board.
1. Turn off all power to equipment.
2. If an existing thermostat or control is being replaced:
a. Remove existing thermostat from wall........
b. Disconnect wires from existing thermostat........
c. Discard or recycle old thermostat........

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NOTE: Mercury is a hazardous waste, if existing control con-
tains any mercury, it MUST be disposed of properly. The Ob-
server® Control does not contain mercury.
3. Select Observer Control mounting plastic
4. Route wires through hole in mounting plastic. Level rear
plastic against wall (for aesthetic value only - Observer Con-
trol need not be level to operate properly) and mark wall
through two mounting holes.
5. Drill two 3/16-in (4.8 mm) mounting holes in wall where
marked.
6. Secure mounting plastic to wall using two screws and an-
chors provided.
7. Adjust length and routing of each wire to reach each wire
entry on the connector back-plate. Strip 1/4--in (6.4 mm) of
insulation from each wire.
8. Match and connect thermostat wires to proper terminals
on wall control back-plate. See Wiring Diagrams in
Appendix.
9. Push any excess wire into the wall. Seal hole in wall to
prevent any air leaks. Leaks can affect operation.
10. Attach Observer Control to the mounting plastic by lining
up the plastic guides on the back of the control with the
opening on the mounting plastic and push on.
11. Perform installation of all other system equipment (i.e.
humidifier, UV lights, etc.).
12. Turn on power to equipment.
NOTE: In a dual fuel installation with a non-communicating
heat pump, an OAT sensor must be installed, or the heat
pump will not run.

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Shielded Wire
If the thermostat wiring will be located near or in parallel with
high voltage wiring, cable TV or Ethernet wiring, then shiel-
dedthermostatwirecanbeusedtoreduceoreliminatepo-
tential interference. The shield wire should be connected to
the C terminal, or ground, at the indoor unit. The shield wire
should NOT be connected to any terminal at the wall control.
Connecting the shield to ground at both ends can cause cur-
rent loops in the shield, reducing shield effectiveness.
Non-communicating equipment
The Observer® Control, when paired with the
NAXA00101DB daughter board, will operate non-communic-
ating equipment. When the system utilizes the
NAXA00101DB daughter board, the Observer Control oper-
ates as a standard universal thermostat. See Appendix Wir-
ing Diagrams
Mounting
First become familiar with all plastic assembly pieces shown
in Figure 2. The wall control will snap together with the
back-plate. A back-plate is supplied Figure 2.Attach
back-plate using only a small hole in the wall allowing a four
wire connection to pass through. Mount the assembly to the
back-plate.
NOTE: Once Observer Control is secured to wall with the
back-plate assembly (snapped together), care must be taken
not to bend or break the interlocking tabs when removing.

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3.90
5.20
0.97
Fig. 2 – Wall Control Assembly Pieces