Pro1 Technologies T855iSH Thermostat User Manual

Pro1 Technologies T855iSH Thermostat

Thermostat Application Guide

Description
Gas or Oil Heat	Yes
Electric Furnace	Yes
Heat Pump (No Aux. or Emergency Heat)	Yes
Heat Pump (With Aux. or Emergency Heat)	Yes
Multi-Stage Systems	Yes
Heat Only Systems	Yes
Cool Only Systems	Yes
Millivolt	No
Wired Remote Sensing	Yes
Any HVAC system up to 5H/3C with standard low voltage controlled humidifier.	Yes
Any HVAC system up to 5H/3C with standard low voltage controlled de-humidifier.	Yes

Power Type
Hardwire (Common Wire)

A trained, experienced technician must install this product. Carefully read these instructions. You could damage this product or cause a hazardous condition if you fail to follow these instructions.

Installation Tips

Wall Locations

The thermostat should be installed approximately 4 to 5 feet above the floor. Select an area with average temperature and good air circulation.

Do not install thermostat in these locations:

• Close to hot or cold air ducts
• That are in direct sunlight
• With an outside wall behind the thermostat
• In areas that do not require conditioning
• Where there are dead spots or drafts (in corners or behind doors)
• Where there might be concealed chimneys or pipes

Installation Tip

Pick an installation location that is easy for the user to access. The temperature of the location should be representative of the building.

Subbase Installation

1. Horizontal Mount
   For horizontal mount put one screw on the left and one screw on the right.
2. Vertical Mount
   For vertical mount put one screw on the top and one screw on the bottom.

Installation Tip: Electrical Hazard
Failure to disconnect the power before beginning to install this product can cause electrical shock or equipment damage.

Mercury Notice
All of our products are mercury-free. However, if the product you are replacing contains mercury, dispose of it properly. Your local waste management authority can give you instructions on recycling and proper disposal.

Mount Thermostat

Align the 4 tabs on the subbase with corresponding slots on the back of the thermostat, then push gently until the thermostat snaps in place.
Note: To ensure a solid fit between the thermostat and the subbase:

1. Mount subbase to a flat wall
2. Use screws provided
3. Drywall anchors should be flush with the wall
4. Wires should be pushed into the wall

Thermostat Quick Reference

Getting to know your thermostat

1. Day of the Week
2. Setpoint Indicator: Displays the user-selectable setpoint temperature.
3. Energy Efficient Globe: Indicates the setpoint temperature chosen is an efficient choice.
4. Indicates the number of heating or cooling stages running
5. Keypad Lockout: Indicates the thermostat is in keypad lockout
6. Time of Day / Outdoor Temp / % Humidity
7. Hold Indicator: Displayed when the thermostat is in permanent hold
8. Indicates current room temperature
9. Indicates if heating or cooling equipment is running
10. WIFI Indicator: Indicates if WIFI is connected.
11. Program Menu Buttons: Shows different options during programming.
12. Fan Button: Changes the fan operation between Auto, IAQ, and On.
13. System Button: Changes the system operation between Off, Cool, Auto, Heat, and Emergency Heat based on system tech setting.

1. LCD Display
2. Glow in the dark light button
3. Setpoint buttons
4. Program buttons
5. Menu button
6. Fan button
7. System button
8. Button access door

About The Badge

All of our thermostats use the same universal magnetic badge. Visit the company website to learn more about our free private label program.

Gently slide a screwdriver into the bottom edge of the badge. Gently turn the screwdriver counterclockwise. The badge is held on by a magnet in the well of the button door. The badge should pry off easily. DO NOT USE FORCE.

Wiring

Caution:
Electrical Hazard

Failure to disconnect the power before beginning to install this product can cause electrical shock or equipment damage.
Warning: All components of the control system and the thermostat installation must conform to Class II circuits per the NEC Code.

1. If you are replacing a thermostat, make note of the terminal connections on the thermostat that is being replaced. In some cases the wiring connections will not be color coded. For example, the green wire may not be connected to the G terminal.
2. Loosen the terminal block screws. Insert wires then retighten the terminal block screws.
3. Place non-flammable insulation into the wall opening to prevent drafts.

Installation Tip
Do not overtighten terminal block screws, as this can damage the terminal block. A damaged terminal block can keep the thermostat from fitting on the subbase correctly or cause system operation issues.
Max Torque = 6in-lbs.

C Terminal
This thermostat requires a 24V common wire to the C terminal.
Wire Specifications
Use shielded or non-shielded 18-22 gauge thermostat wire.

Note:

• In many heat pump systems with no emergency heat relay, a jumper can be installed between E and W2 to turn the thermostat into a single-stage control for Emergency Heat Operation.
• Outdoor temperature sensor, Indoor temperature sensors, and Slab sensor wiring diagrams are located in R250S and R251S manuals.

Terminal Designations

This thermostat is shipped from the factory to operate a conventional heating and cooling system. This thermostat may also be configured for a heat pump system. See the “heat pump” configuration step on page 16 of this manual to configure the thermostat for heat pump applications.

Terminal	2 Heat 2 Cool Conventional System	2 Heat 1 Cool Heat Pump System	4 Heat 2 Cool Heat Pump System	5 Heat 3 Cool Heat Pump System
RC	Transformer power (cooling)	Transformer power (cooling)	Transformer power (cooling)	Transformer power (cooling)
RH	Transformer power (heating)	Transformer power (heating)	Transformer power (heating)	Transformer power (heating)
C	Transformer common	Transformer common	Transformer common	Transformer common
B	Reversing valve / configurable terminal	Reversing valve / configurable terminal	Reversing valve / configurable terminal	Reversing valve / 3rd stage of heat & cool
O	Reversing valve / configurable terminal	Reversing valve / configurable terminal	Reversing valve / configurable terminal	Reversing valve / 3rd stage of heat & cool
G	Fan relay	Fan relay	Fan relay	Fan relay
W/E	First stage of heat	Emergency Heat	First stage of auxiliary heat	First stage of auxiliary heat (4th stage of heat)
Y	First stage of cool	First stage of heat & cool	First stage of heat & cool	First stage of heat & cool
Y2	Second stage of cool	N/A	Second stage of heat & cool	Second stage of heat & cool
W2	Second stage of heat	Auxiliary heat	Second stage of auxiliary heat	Second stage of auxiliary heat (5th stage of heat)
S1/S2	Remote Sensor	Remote Sensor	Remote Sensor	Remote Sensor
H	Humidify	Humidify	Humidify	Humidify
D	Dehumidify	Dehumidify	Dehumidify	Dehumidify

1. Power supply
2. Factory-installed jumper. Remove only when installing on 2-transformer systems.
3. Use either O or B terminals for the changeover valve
4. A 24 VAC common connection is required with this thermostat.
5. If DEHUM relay requires a normally-energized input, set Dehumidify relay to NC in Technician Setup.

• Typical 2H/2C System: 1 Transformer
• Typical Cool-Only System With Fan
• Typical Heat Only System With Fan
• Typical 2H/2C System: 2 Transformer
  
• Typical 2H/1C Heat Pump System
  

Note:
In many systems with no emergency heat relay a jumper can be installed between E and W2.

1. Power supply
2. Factory-installed jumper. Remove only when installing on 2 transformer systems.
3. Use either O or B terminals for the changeover valve.
4. A 24 VAC common connection is required with this thermostat.
5. If the DEHUM relay requires a normally-energized input, set Dehumidify relay to NC in Technician Setup.

Technician Setup Menu

This thermostat has a technician setup menu for easy installer
configuration. To set up the thermostat for your particular application:

1. Press the MENU button.
2. Press and hold the TECH SET button for 3 seconds. This 3 second delay is designed so that homeowners do not accidentally access the installer settings.
3. Configure the installer options as desired using the table below.
   Use the keys to change settings and the NEXT or PREV key to move from one step to another.
   Note: Only press the DONE key when you want to exit the Technician Setup options.
4. Press the DONE key to exit.

Swing Setting Tip
The second stage will turn on at 2x the swing setting. The second stage will turn off when 1x the swing is reached. For example, if the swing setting is .5 degrees for heating and the thermostat is set at 70˚F, the first stage will turn on at approximately 69.5˚F. The second stage will turn on at 69˚F. The second stage will turn off at 69.5˚F and the first will turn off at 70.5˚F. If the third stage is used, it will turn on at 68.5˚F and turn off at approximately 69˚F.

Technician Setup Menu                                                       Technician Setup Menu
Tech Setup Steps                                          LCDWill Show			Adjustment Options    Default      Tech Setup Steps                                        LCDWill Show						Adjustment Options    Default
System Stages	This setting allows you to select the number of heat and cool stages.	2H2C   SET STAGES	Use the           and     buttons to select 1H/1C, 2H/1C, 2H/2C, 3H/1C, 3H/2C, 3H/3C, 4H/2C, 4H/3C, 5H/3C. Note: Heat and cool choices are limited based on conventional, heat pump, or PTAC system configuration.	2H		Satisfy Setpoint Staging (Only displayed if there are more than one stage of heat or cool)	This feature allows the thermostat to keep multiple stages of heat or cool energized until the setpoint is satisfied.	OF SS STAGING	Use the          or      buttons to turn on of off.	OFF
						Staging Delay (Only displayed if there are more than one stage of heat or cool)	This feature allows a delay to occur if an additional stage is needed. This allows the previous stage extra time to satisfy the setpoint. Note: Will not show if using outdoor sensor with balance point temperature.	OF STAGING DELAY	Use the     or               key to select OFF, 5, 10, 15, 30, 45, 60, or 90 minutes.	OFF
Third Stage of	This setting allows the O or B terminal to be selected as the third stage of cool. The selected terminal will not be used for reversing valve functions in heat pump mode.	0 3 COOL TERM	Use the     and               buttons to select O/B.	O
Cool Terminal
Designation
(Only displayed
if stages of cool
is set to three on
previous setting)						Minimum Compressor On Time	This feature allows the installer to select the minimum run time for the compressor. For example, a setting of 4 will force the compressor to run for at least 4 minutes every time the compressor turns on, regardless of the room temperature.	OF MIN COMP ON	You can set the minimum compressor run time to “OFF”, “3”, “4”, or “5” minutes. If 3, 4 or 5 is selected, the compressor will run for at least the selected time before turning off. Use the and                buttons to change the setting.	OFF
System Set	You can configure the system switch for the particular application. Heat – Off – Cool, Heat – Off, Cool – Off, Heat – Off – Cool – Auto. Note: Emergency Heat is available in heat pump mode only.	SYSTEM SET   AutoOff Em.Heat Cool	Use the          or       buttons until the desired application is flashing. AUTO = (Auto Changeover)	Heat
				Off
				Cool
Dual Fuel Auxiliary For Heat Pump (Only displayed if heat pump is set to “ON”)	This setting allows the system to run Gas, Oil, Propane or any other types of auxiliary heat. The thermostat will default to electric auxiliary heat in heat pump applications.	OF DUAL FUEL	Use the           and     buttons to select ON/OFF.	OFF		Compressor Short Cycle Delay	The compressor short cycle delay protects the compressor from “short cycling”. This feature will not altlow the compressor to be turned on for 5 minutes after it was last turned off.	COMP DELAY	Selecting “ON” will not allow the compressor to be turned on for 5 minutes after the last time the compressor was on. Select “OFF” to remove this delay. Use the                       and buttons to change the setting.	ON
Electric or Gas Fan Operation   (Only displayed if heat pump is set to “ON”)	Select GAS to have the system control the fan during a call for heat, select Electric to have the thermostat control the fan during a call for heat. Note: If heat pump is set to “ON” this step will not show, and will default to ELECTRIC.	GAS         FAN SET	Use     and           buttons to change the setting.	GAS		Cooling Fan Delay	The cooling fan delay setting will delay the fan from coming on in cool mode and keep it running after the compressor shuts off for a short time to save energy in some systems.	OF COOL FAN DL	You can set the cooling fan delay to OFF, 10, 30, 60 or 90 seconds. If 10, 30, 60, or 90 is selected the fan will not turn on for that many seconds when there is a call for cool and will run for that many seconds after satisfying a call for cool.	OFF

Tech Setup Steps		LCD Will Show	Adjustment Options	Default
Program Options	You can configure this thermostat to have a 7 day program or No program. Note: If 7d is selected, in set schedule you will program all seven days individually. If 0d is selected the thermostat becomes non-programmable and the Set Schedule button goes away in Menu.	7d   PROGRAM	Use the     and     button to select 7d for 7 day or 0d for non-programmable.	7d
Time Periods (Only displayed if program optioin is set to 5d or 7d)	You can configure this thermostat to have 2 or 4 programmable time periods per day.	4 TIME PERIODS	Use the and buttons to select 4, 2C, or 4C time periods per day.   4: Wake, Leave, Return & Sleep. 2C: time periods are Occupied & Unoccupied. 4C: time periods are Occupied 1, Unoccupied 1, Occupied 2, & Unoccupied 2	4
Pro Recovery	This feature will start heating and cooling early to bring the building temperature to its programmed setpoint by the beginning of the WAKE, RETURN and OCCUPIED time periods.	PRO RECOVERY	Use the      or       key to select on or off.	ON
Cycle Minimizer (Only displayed if program optioin is set to 5d or 7d)	This setting maximizes efficiency and equipment longevity by increasing the heating and cooling swing settings to 2° during the unoccupied and leave time periods. This will result in significantly fewer system cycles.	OF CYCLE MIN	Use the      or       key to select on or off.	OFF

Tech Setup Steps		LCD Will Show	Adjustment Options	Default
Keypad Lockout	Keypad lockout allows you to configure the thermostat so some or all of the keys don’t function.	OF   KEY LOCKOUT	Use the     and     buttons to select OFF, BASC, PART, FULL OF – OFF= keypad lock- out has been disabled. BA – BASIC = basic keypad lockout locks the menu key. PA – PARTIAL= partial keypad lockout, which locks all the keys except the or setpoint keys. FU – FULL= full keypad lockout, which locks out all the keys.	OFF
Keypad Lockout Code (Only displayed if keypad lockout is set to Basic, Partial, or Full)	Keypad lockout with code shows only when Keypad Lock is set to BASIC, PARTIAL or FULL	OF     KEY CODE	1.  When ON you must enter the code after pressing the and    buttons toegether for 3 secounds to take the thermostat in or out of keypad lockout. You will then be taken to a screen that allows you to enter the code.   2.  Use    and    to change each number. Use the Previous and Next keys to change from one number to the next. The number you are currently on will blink.   3.  Press Done when completed. If entered correctly the thermostat will be re- moved from keypad lockout.	OFF

Keypad Lockout Note: The selected keypad lockout functionality must be activated after exiting tech setup. If you do not perform this procedure, all keys will function freely. To lock the keypad hold down the keys for 3 seconds. You will see a lock in the display. To unlock the display hold down the keys for 3 seconds.

Tech Setup Steps		LCD Will Show	Adjustment Options	Default
Keypad Lockout Code Creation (Only displayed if keypad lockout is set to Basic, Partial, or Full)	Keypad lockout with code creation is displayed when Keypad Lockout Code is turned on (Basic, Partial or Full is selected).	0000                             KEY CODE	OFF= Code is disabled and the lock icon is used to lock and unlock the display.   ON = Create a 4 digit code that locks and unlocks the display.   NOTE: In this tech setting, the clock field will show all four characters as 0s, with the first 0 blinking.   Select the numbers of the code by using the and buttons and switch between numbers by using the “next” and “previous” buttons. After DONE is pressed, the created code will be saved and will be needed to activate or deacti- vate keypad lockout functions. The master code is 7761. The master code will override any created keypad lock code.	0000
Heat Setpoint Limit	This feature allows you to set a maximum heating setpoint limit. The setpoint temperature cannot be raised above this value.	HE	Use the   or      key to select the maximum heat setpoint and the minimum cooling setpoint.	90˚F
		HEAT LIMIT
Cool Setpoint Limit	This feature allows you to set a minimum cooling setpoint limit. The setpoint temperature cannot be lowered below this value.	CO COOL LIMIT	Use the   or     key to select the minimum cooling setpoint.	44˚F
Temporary Hold Hours (Only displayed if program option is set to 5d or 7d)	This feature will select a temporary hold time frame for the programmable mode of the thermostat. When the setpoint is changed, the thermostat will enter into a temporary hold for the number of hours selected from this tech setting.	4 TEMP HOLDERS	Use the     and buttons to select 0, 1, 2, 3, 4, 5 and 6.	4

Tech Setup Steps		LCD Will Show	Adjustment Options    Default
˚F or ˚C	This feature allows you to display temperatures in either Fahrenheit or Celsius.	oF F OR C SET	˚F for Fahrenheit ˚C for Celsius	˚F
12 or 24 Hour Clock	You can select either a 12 or 24 hour clock setting.	12 CLOCK SET	Use the    or      key to select 12 or 24 hour clock.	12H
Pre Occupancy Fan	The pre-occupancy fan settings will energize the fan before the occupied time to provide ventila- tion prior to scheduled occupancy time periods. This feature only shows if the technician setup step for time periods is set to 2C or 4C.   Use the  and     buttons to adjust.	OF PRE-OCC FAN	You can select the pre-occupancy fan from OFF, 1, 2, or 3 hours. If 1, 2, or 3 is selected, the fan will turn on that many hours prior to the scheduled occupied time period.	OFF
Display Light	The display light can be configured to stay on all the time or turn on when any key is pressed. There are LOW and HIGH selections for continuous ON selection.	dL ALWAYS ON LIT                       dL HARDWIRE ONLY	Use the     and     buttons to select OFF, LOW, or HIGH. OFF configures the display light to come on when the light key or any button is pressed. LOW configures the display light to stay on at a low intensity constantly. When a button is pressed, the display light will transition to high intensity. HIGH configures the display light to remain on at high intensity all the time.	LOW

Tech Setup Steps                                         LCDWill Show			Adjustment Options    Default
Contractor Call Number	This feature allows you to put your phone number in the display. You can choose ON or OFF. Notes: If contractor call number is selected ON, the phone number entered will show in the display if there has been a continuous call for heating or cooling for 24 hours or if the light button is held down for 3 seconds. To remove the phone number from the display, hold the light button down for 3 seconds.	OF   PHONE NUMBER	If selected ON, you will see the input screen after pressing NEXT STEP. Use the or      button to select the desired number and the FAN or SYSTEM key to move from one character to another. See note below for operation.	OFF
IAQ Mode Cycle	This feature will configure the fan to run a selected number of cycles per hour. Note: This mode can be enabled or disabled at anytime during normal operation by selecting IAQ mode with the fan key. Turning this feature on shows IAQ option in fan key. Notes: This programmable/selectable mode will operate the fan 1-4 cycles per hour, 1-45 minutes per cycle. Once programmed in tech setup, to enable this mode select “IAQ” with the fan key. Disable this mode by selecting “ON” or “AUTO” with the fan key.	OF   IAQ MODE CYCL	Select OFF, 1, 2, 3 or 4 with the or      buttons. This sets the number of cycles per hour that the IAQ fan mode will operate.	OFF
IAQ Minutes Per Cycle	This allows you to select the minimum number of minutes that the fan will run per IAQ mode cycle. The thermostat will keep track of fan runtime from normal heat and cool operation. If additional fan runtime is needed, the thermostat will run the fan to satisfy the IAQ mode minutes. Notes: This programmable/selectable mode will operate the fan 1-4 cycles per hour, 1-45 minutes per cycle. Once programmed in tech setup, to enable this mode select “IAQ” with the fan key. Disable this mode by selecting “ON” or “AUTO” with the fan key.	1   IAQ MODE MIN	Select 1, 5, 10, 15, 20, 30 or 45 minutes. When IAQ fan mode is enabled, it will ensure the fan runs at least the selected number of minutes per IAQ Mode Cycle. This step will not appear if previous step is set to “OFF”.	1

Tech Setup Steps		LCD Will Show	Adjustment Options	Default
Economizer Mode (This feature cannot be used with non- programmable PTAC mode, three stages of cool, fresh air, of free cooling mode)	When this feature is enabled, the economizer terminal is energized in the WAKE, RETURN, SLEEP or OCCUPIED time periods. This feature will remain disabled if programming is OFF (0D). This feature will use one of the configurable terminals (O/B) to connect to the economizer.	OF ECONOMIZER	Use the     and     buttons to select ON or OF.	OFF
Economizer Terminal Designation (Only displayed if economizer is turned on)	This setting provides the option to select a terminal for Economizer functions. The selected terminal cannot be used for reversing valve operations when the heat pump setting is turned on.	O	Use the     and     buttons to select O/B.	O
		B
		ECON TERMINAL
Fresh Air Minutes	This setting selects the minimum number of minutes that the fresh air damper will be energized.	40 FRESH AIR MIN	Use the   and    buttons to select 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 or 60 minutes.	5

Contractor Call Number Note
If contractor call number is selected ON, the phone number entered will show in the display if there has been a continuous call for heating or cooling for 24 hours or if the light button is held down for 3 seconds. To remove the phone number from the display, hold the light button downfor 3 seconds.

A Note about IAQ Mode
This programmable/selectable mode will operate the fan 1-4 cycles per hour, 1-45 minutes per cycle. Once programmed in tech setup, to enable this mode select “IAQ” with the fan key. Disable this mode by selecting “ON” or “AUTO” with the fan key.

Tech Setup Steps		LCD Will Show	Adjustment Options		Default
Fresh Air Mode (This setting cannot be used with PTAC, three stages of cool, or economizer turned on)	This feature allows fresh air into a unit for a selectable amount of time. When Fresh Air Mode is enabled, the fan and the fresh air damper terminal will energize simultaneously.	OF	Use the    and    buttons to select OFF, OC ON or ON. OFF: Thermostat does not enable Fresh Air Mode. OC ON: Fresh Air Mode is enabled during the OCCUPIED, WAKE, RETURN, and SLEEP time periods (It will not bring in fresh air during UNOCCUPIED and LEAVE time periods).		OFF
		FRESH AIR	ON: Thermostat will enable Fresh Air Mode for every time periods.
Fresh Air Terminal (Only displayed if fresh air mode is turned ON. This setting cannot be used with PTAC, three stages of cool, or economizer turned ON.)	This setting provides the option to select a terminal for Fresh Air damper functions. The selected terminal cannot be used for reversing valve operations when the heat pump setting is turned on.	0   FRESH AIR TRM	Use the     and to select O/B.	buttons	O
Remote Sensor Operation (Only displayed if a sensor is connected to S1 and S2 terminals)	You can configure the thermostat for one of three remote sensor applications: 0 No Sensor, 1 Indoor, 2 Outdoor, 3 Floor.	0	Use the left and right arrows to select one of three options. View the S1/S2 terminal chart on next page for an explanation of these options.		0
		REMOTE MODE

Tech Setup Steps                                         LCDWill Show			Adjustment Options    Default
Local Temp Sensor (Only displayed if remote sensor setting is set to 1)	You can disable the sensor on the T855SH thermostat. At least one R251S indoor remote sensor must be connected to disable the local T855S sensor. Note: Will only show if remote sensor is set to 1.	LOCAL TEMP	ON enables local T855SH sensor. OFF disables local T855SH sensor.	ON
Number of Indoor Remotes (Only displayed if remote sensor setting is set to 1)	Enables the use of up to sixteen indoor sensors R251S. Note: Will only show Remote Sensor is set to 1 and Local Temp Sensor is set to on.	1 NUMBER REMOTE	You can use 1, 4, 9, or 16 indoor sensors. Refer to the R251S Install Manual for de- tailed connection information	1
Dual Fuel Balance Point (Only displayed if remote sensor setting is set to 2 and Dual Fuel AUX = On)	An outdoor temperature above balance point will cause the thermostat to energize the Y terminal(s) only in calls for heat. An outdoor temperature below balance point will cause the thermostat to energize the W2 terminal only in calls for heat.	OF BALANCE POINT	Use the   and    buttons to select OFF, 10, 15, 20, 25, 30, 35, 40, 45, 50 degrees.	OFF
Balance Point Electric AUX Cut Out (Only displayed if remote sensor setting is set to 2 and Duel Fuel Aux if Off)	Balance point with electric auxiliary will optimize heat pump usage. When the outdoor temperature is above the AUX CUT OUT selection, the thermostat to only allow the Y terminal(s) will energize and lockout the W2 terminal. When the outdoor temperature falls below the AUX CUT OUT selection and sits above the AUX CUT IN selection, the thermostat will allow the Y terminal(s) and the W2 terminal to energize. When the outdoor temperature is below the AUX CUT IN selection, the thermostat will only energize the W2 termi- nal and lockout the Y terminal(s).	40 AUX CUT OUT	Use the   and    buttons to select 10, 15, 20, 25, 30, 35, 40, 45, 50 degrees.	OFF

Tech Setup Steps		LCD Will Show	Adjustment Options	Default
Balance Point Electric AUX Cut In (Only displayed if remote sensor setting is set to 2 and Duel Fuel Aux if Off)	Balance point with electric auxiliary will optimize heat pump usage. When the outdoor temperature is above the AUX CUT OUT selection, the thermostat to only allow the Y terminal(s) to energize and lockout the W2 terminal. When the outdoor temperature falls below the AUX CUT OUT selection and sits above the AUX CUT IN selection, the thermostat to allow the Y terminal(s) and the W2 terminal to energize. When the outdoor temperature below the AUX CUT IN selection, the thermostat will only energize the W2 terminal and lockout the Y terminal(s).	40 AUX CUT IN	Use the   and    buttons to select 10, 15, 20, 25, 30, 35, 40, 45, 50 degrees.	OFF
Balance Point Run Time (Only displayed if remote sensor setting is set to 2)	Balance point run time will allow the W2 auxiliary terminal to ener- gize even if outdoor temperature is above selected balance point temperature. If enabled, auxiliary will energize for the current cycle after the balance point run time has expired. Note: Only shows if Balance Point is set to an outdoor temperature.	OF   BP RUN TIME	Off, 15, 30, 45, 60, 75, 90	OFF
Free Cooling (Only displayed if remote sensor setting is set to 2)	This feature will bring in outside air for first stage cooling opera- tions, if the outdoor temperature is 5 (or more) degrees lower than the setpoint temperature. This setting can only be enabled if the thermostat is in cooling mode.	OF FREE COOLING	Use the     and     buttons to select ON/OFF.	OFF

Tech Setup Steps		LCD Will Show	Adjustment Options		Default
Free Cooling Terminal (Fresh air mode and free cooling can be used together. Free cooling cannot be used with PTAC mode, three stages of heat, or economizer mode)	This setting provides the option to select a terminal for Free Cooling functions. The selected terminal cannot be used for reversing valve operations when the heat pump setting is turned on.	O FREE COOLTRM	Use the    and to select O/B.	buttons	O
Floor Temperature (Only displayed if remote sensor setting is set to 3)	The temperature of the floor sensor will be displayed.   Note: Only shows when REOP is set to 3. Use     and     buttons to adjust.	76 FLOOR TEMP	N/A		N/A
Floor High Limit (Only displayed if remote sensor setting is set to 3)	This setting allows you to set a maximum floor temperature limit for heat. Heat will be locked out when the floor temperature is above this value. Note: Only shows when REOP is set to 3.	86 HIGH LIMIT	Use the or buttons to select the High Limit for the floor sensor.35 – 120		86
Floor Low Limit (Only displayed if remote sensor setting is set to 3)	This setting allows you to set a minimum floor temperature limit for heat. Heat will turn on automatically when the floor temperature is below this value. Note: Only shows when REOP is set to 3.	50	Use the    or      keys to select the Low Limit for the floor sensor. 35 – 120		50
		LOW LIMIT

Tech Setup Steps		LCD Will Show	Adjustment Options	Default
Humidify	This feature adds humidity when system key is in HEAT.	OF HUMIDIFY	Use the    and      key to turn on or off. If ON is selected the humidity will be displayed on the main screen and HUM terminal will energize when humidity setpoint is above ambient humidity in Heat mode.	OFF
Dehumidify	This feature removes humidity when system key is in COOL.	OF DEHUMIDIFY	Use the    and      key to turn on or off. If ON is selected the humidity will be displayed on the main screen and DUM terminal will energize when humidity setpoint is below ambient humidity in Cool mode.	OFF
Humidity Calibration (Only shows if Humidify or Dehumidify is set to “ON”)	This feature allows the installer to change the calibration of the ambient humidity displayed.	OF HUMIDITY CAL	Use the left and right arrows to adjust the calibration +/-3. Each one unit of adjustment amounts to approximately 5%.	O
Dehumidify With AC (Only shows if dehumidify is set to “ON”)	This feature forces the A/C to run longer to remove humidity when needed. The A/C will “over cool” the room a few degrees until humidity reaches the desired setpoint. The numbers below are the maximum number of degrees the thermostat will overcool to satisfy humidity. For example, If temperature set point is 70 and humidity set point is 50 and swing is 1 degree and “Dehumidify with AC” is set to 3 and the ambient is 68 and indoor humidity is 60 … the thermostat will continue to run air conditioning until 67 degree to try to satisfy the humidity set point of 50	0F   DEHUMIDIFY AC	Use the   and    buttons to select Off, 2, 3, 4, 5 If selected a number is selected the thermostat will use the air condition to “over cool” to control humidity in Cool mode. If Off is selected the system will not use over cooling.	0FF

This table references different humidity levels the thermostat will conform to, based on the outdoor temperature measurements. When the Automatic Humidity Adjusting tech setting selection is ON1 or ON2, the thermostat humidity will stay adjusted to the humidity level that correspond to the outdoor temperature based on the chart index below.

Tech Setup Steps		LCD Will Show	Adjustment Options	Default
Over Cool Limit (Only displayed if Dehumidify with AC is turned “ON”)	The amount of over cooling allowed when using A/C to remove humidity. This screen is only shown when ON is selected in the Dehumidify with AC tech setup step.	3	Use the and left and right arrows to select the maximum number of degrees of over cool. Options are: 2,3,4,5	3
		OVER COOL LMT
HUM Terminal (Only shows if humidify is set to “ON”)	Options for how the HUM terminal energizes. See chart below	1 HUM TERMINAL	Use the left and right arrows to select one of the four options. View the HUM terminal chart below for an explanation of these options.	1
DUM Terminal (Only shows if dehumidify is set to“ON”)	Options for how the DHM terminal energizes. See chart below	1 DUM TERMINAL	Use the left and right arrows to select one of the four options. View the DHM M terminal chart below for an explanation of these options.	1

HUM Terminal

OPTIONS	HUM terminal energizes when the ambient humidity is…
1	Below the humidity setpoint and heat or fan is energized.
2	Below the humidity setpoint and heat is energized.
3	Below the humidity setpoint. It will also energize the fan during a call for humidity.
4	Below the humidity setpoint.

DHM Terminal

OPTIONS	DUM terminal energizes when the ambient humidity is…
1	Above the humidity setpoint and cool or fan is energized.
2	Above the humidity setpoint. It will also energize the fan during a call for dehumidity.
3	Above the humidity setpoint.
4	Above the humidity setpoint and the compressor is not running.

Tech Setup Steps		LCDWill Show	Adjustment Options	Default
Automatic Humidity Adjusting (Only displayed if remote sensor setting is set to 2 and humidity is turned“ON”)	This feature will adjust the indoor humidity as the outdoor temperature changes. When OFF is selected, the humidity will constantly stay at the same percentage. When ON is selected, the indoor humidity will fluctuate based on outdoor temperature.	OF	Use the and buttons to select OFF, ON 1 or ON 2. When ON 1 or ON 2 is selected and the humidity level is adjusted, the thermostat will revert to the original humidity level after four hours. See the Automatic Humidity Adjusting chart for humidity ranges.	OFF
		AUTO HUMIDITY	Please see revious page for chart.
Dehumidify Relay (Only shows if dehumidify is set to “ON”)	You can configure the D terminal as Normally-Open or Normally-Closed. NO = Normally Open NC = Normally Closed		Use the or key to select NO or NC. If NO is selected D will energize to dehumidify. If NC is selected D will be normally energized. D will de-energize to dehumidify.	NO
		DHM RELAY O/C
Summer Away Mode (Only displayed if dehumidity is turned “ON”)	Summer Away Mode protects the home in unoccupied long periods of time, during hot and humid weather. This is done by main- taining programmed and desired humidity and temperature set- tings. Summer Away Mode will show in the text field and allows the thermostat to put the pro- grammed set point and humidity level in a permanent HOLD when this setting is enabled (HOLD will have to be manually removed). Dehumidity tech setting must be ON for this feature to be available. Cycle Minimizer is turned ON when Summer Away Mode is ac- tivated by the user (usually cycle minimizer is based on Unoccupied and Leave time periods). Adds another Tech Setting: following this one	OF     SUMMER AWAY	Use the     and buttons to select ON/OFF. When ON is selected, Summer Away Mode is activated by pressing and holding the “HOLD” key on the thermostat screen, for 3 seconds.	OFF

	Technician Setup Menu
	Tech Setup Steps                                          LCDWill Show
	Summer Away Mode Humidity (Only displayed if summer away mode is turned “ON”)	This tech setting will select the desired humidity level for Summer Away Mode.   Note: The thermostat will default to the Dehumidify set point when this feature is enabled.	75 Humidity % SUMMER AWAY	Use the     and               buttons to select the humidity level for Summer Away Mode.	OFF
	Comfort Temperature (Only displayed if humidity is turned “ON”)	This feature uses both air temperature and the relative humidity to control the indoor temperature based on how it actually feels for people to maximize comfort.	OF   COMFORT TEMP	If ON is selected the ambient temperature will operate off of a combination of the air temperature and the relative humidity. When OFF the ambient temperatures will operate off of the air temperature only. The thermostat will show the comfort index in the ambient temp area and drive the heating and cooling based on this.	OFF
	Humidity Pad Reminder	Enables a reminder for the user to change the humidity pad.	OFF     HUMIDITY PAD	Use the     or      key to select OFF, 600, 1000, 1500, or 2000. These represent hours of heat operation.	OFF
	UV Lamp Reminder	Enables a reminder for the user to change the UV light bulb.	OFF     UV LAMP	Use the    or              key to select OFF, 1 YR, 2 YR	OFF
	IAQ Cell Reminder	Enables a reminder for the user to change the IAQ Cell after 25,000 hrs.	OFF   IAQ CELL	Use the    or              buttons to select OFF, or 25 (stands for 25,000 hours).	OFF

Setting the Humidity

Comfort Temperature Index

Temperature 50	20%-25% 50	26%-35% 50	36%-45% 50	46%-55% 50	56%-65% 50	66%-75% 50	76%-85% 50	86%-90% 50
51	50.6	50.7	50.7	50.9	51	51	51	51.2
52	51.2	51.5	51.5	51.7	52	52	52	52.5
53	52.3	52.5	52.5	52.8	53	53	53	53.5
54	52.9	53.3	53.3	53.6	54	54	54	54.8
55	53.5	54	54	54.5	55	55	55	56
56	54.1	54.6	54.7	55.3	56	56	56	57
57	54.7	55.2	55.4	56.2	56.9	56.9	56.9	57.9
58	55.8	56.3	56.6	57.3	58.1	58.1	58.1	59.1
59	56.4	56.9	57.3	58.2	59	59	59	60
60	57	57.5	58	59	60	60	60	61
61	58	58.5	59.1	60.1	60.9	60.9	61.1	61.9
62	58.9	59.4	60.1	61.1	61.9	61.9	62.1	62.9
63	60.1	60.6	61.4	62.4	63.1	63.1	63.4	64.1
64	61	61.6	62.4	63.4	64.1	64.1	64.4	65.1
65	62	62.5	63.5	64.5	65	65	65.5	66
66	62.7	63.3	64.3	65.3	65.9	65.9	66.5	66.9
67	63.4	64.1	65.1	66.1	66.8	66.8	67.6	67.8
68	64.6	65.4	66.4	67.4	68.2	68.2	68.9	69.2
69	65.3	66.2	67.2	68.2	69.1	69.1	70	70.1
70	66	67	68	69	70	70	71	71
71	67.2	68.2	69.1	70.1	71.1	71.4	72.4	72.6
72	68.3	69.3	70.3	71.3	72.3	72.8	73.8	74.3
73	69.7	70.7	71.7	72.7	73.7	74.2	75.2	75.8
74	70.8	71.9	72.9	73.9	74.9	75.6	76.6	77.4
75	72	73	74	75	76	77	78	79
76	72.9	73.9	74.9	76.1	77.1	78.6	79.6	80.6
77	73.8	74.7	75.7	77.2	78.2	80.2	81.2	82.7
78	75.2	76.3	77.3	78.8	79.8	81.8	82.8	84.3
79	76.1	77.1	78.1	79.9	80.9	83.4	84.4	86.2
80	77	78	79	81	82	85	86	88
81	77.9	79.1	80.3	82.3	83.6	86.6	88.3	91
82	78.7	80.2	81.7	83.7	85.1	88.1	90.6	94.1
83	80.3	81.8	83.3	85.3	86.9	89.9	92.4	96
84	81.1	82.9	84.7	86.7	88.4	91.4	94.7	99
85	82	84	86	88	90	93	97	102
86	82.8	85.1	87.3	89.5	92	95.8	100.5	106.4
87	83.7	86.1	88.6	91.1	94.1	98.5	104	110.9
88	85.3	87.9	90.4	92.9	96	100.5	106.1	113.1
89	86.2	88.9	91.7	94.5	98	103.2	109.5	117.6
90	87	90	93	96	100	106	113	122

Setting Target Humidity Setpoint

Follow the steps below to change your target humidity setpoint.
Press the HUMIDITY key
Use the key to select the target humidity setpoint.
Press DONE when completed.

Note:The target humidity setpoint is not programmable. Unlike temperature, humidity does not change quickly and should not be programmed.
Humidity is only energized during heat. Dehumidify is only energized during cool. Heat and Cool each have their own target setpoints.

Ambient humidity will flash in the time field when Humidify or De-Humidify is set to ON.
HON will also flash when the Humidity terminal is energized. dON will also flash when the De-Humidify terminal is energized.

Recommended Heating Settings:
Increasing Humidity
The table below shows recommended indoor humidity levels in relation to outdoor temperatures during heating (adding humidity).

Recommended Cooling Settings:
Consult your professional HVAC technician for recommended settings for your climate.

Programming

Set Time

Follow the steps below to set the day of the week and current time:

1. Press the MENU button.
2. Press SET TIME.
3. day of the week is flashing. Use the key to select the current day of the week.
4. Press NEXT.
5. the current hour is flashing. Use thekey to select the current hour. When using 12-hour time, make sure the correct a.m. or p.m. choice is selected.
6. Press NEXT.
7. Minutes are now flashing. Use thekey to select current minutes.
8. Press DONE when completed.

All our programmable thermostats are shipped with an energy-saving default program. You can customize this default program by following the instructions in the set program schedule section starting on page 24.
Your thermostat can be programmed to have each day of the week programmed uniquely (7 days) or non-programmable. For the 7-day programming modes, there are three time period options.

1. “4” Residential (WAKE, LEAVE, RETURN, SLEEP)
2. “2C” Commercial (OCCUPIED, UNOCCUPIED)
3. “4C” Commercial (OCCUPIED 1, UNOCCUPIED 1, OCCUPIED 2, UNOCCUPIED 2)

This thermostat has a programmable fan feature, which allows you to run the fan continually during any time period.

Reminders
Once a reminder has been turned on and set, the elapsed time can be checked by navigating to its tech setup step. The elapsed time will then appear in the text field. It can also be reset at that time by holding down the set time/run sched button for 3 seconds. Resetting an expired reminder can be done without entering tech setup, by holding down the set time/run sched button for 3 seconds from the home screen.
Staging Delay Note: This step will not appear if using an outdoor balance point temperature.

Custom Program

Day of the Week	Events	Time	Setpoint Temperature (HEAT)	Setpoint Temperature (COOL)
Weekday	Wake/OCC1
	Leave/UNOCC1
	Return/OCC2
	Sleep/UNOCC2
	Occupied
	Unoccupied
Saturday	Wake/OCC1
	Leave/UNOCC1
	Return/OCC2
	Sleep/UNOCC2
	Occupied
	Unoccupied
Sunday	Wake/OCC1
	LeaveUNOCC1
	Return/OCC2
	Sleep/UNOCC2
	Occupied
Unoccupied

To customize your 7 day 4 time period Program schedule, follow these steps:
Monday:

1. Select HEAT or COOL with the SYSTEM key.
   Note: You have to program heat and cool each separately.
2. Press the MENU button (If menu does not appear first, press RUN SCHED).
3. Press SET SCHED.
   Note: Monday is displayed and the WAKE/OCC1 icon is shown. You are now programming the WAKE/OCC1 time period for that day.
4. Time is flashing. Use the key to make your time selection for that day’s WAKE/OCC1 time period.
5. Note: If you want the fan to run continuously during this time period, select ON with the FAN key. If you want to use IAQ mode during this time period, select IAQ with the FAN key.
6. Press NEXT.
7. The setpoint temperature is flashing. Use thekey to make your setpoint selection for that day’s WAKE/OCC1 period.
8. Press NEXT.
9. Repeat steps 4 through 7 for that day’s LEAVE/UNOCC1 time period, for that day’s RETURN/OCC2 time period, and for that day’s SLEEP/UNOCC2 time period.

Repeat steps 4 through 8 for the remaining days of the week.
A Note About Auto Changeover:
In Auto you have the ability to switch between Auto Heat or Auto Cool by pressing the system key. This can be done once the current mode has reached its setpoint. For example: if in Auto Heat, the heat setpoint must be satisfied before the thermostat will allow you to switch to Auto Cool. You can switch out of Auto by holding down the system key. To get back into Auto, you must toggle the system key to Auto.

To customize your 7 day 2 time period program schedule, follow these steps:

Monday:

1. Select HEAT or COOL with the SYSTEM key.
   Note: You have to program heat and cool each separately.
2. Press the MENU button (If the menu does not appear first press RUN SCHED).
3. Press SET SCHED. Note: Monday is displayed and the OCCUPIED text is shown. You are now programming the  OCCUPIED time period for that day.
4. Time is flashing. Use the or key to make your time selection for that day’s OCCUPIED time period.
   Note: If you want the fan to run continuously during this time period, select ON with the FAN key. If you want to use IAQ mode during this time period, select IAQ with the fan key.
5. Press NEXT.
6. The setpoint temperature is flashing. Use the or key to make your setpoint selection for that day’s OCCUPIED period.
7. Press NEXT.
8. repeat steps 4 through 7 for that day’s UNOCCUPIED time period.

Repeat steps 4 through 8 for the remaining days of the week.

A Note About Programmable Fan:
The programmable fan feature will run the fan continuously during any time period it is programmed to be on. This is the best way to keep the air circulated and to eliminate hot and cold spots in your building. If using IAQ mode, set fan to IAQ for any time period.

Default Programming

Factory Default Program

Day of the Week	Events	Time	Setpoint Temperature (HEAT)	Setpoint Temperature (COOL)
Weekday	Wake/OCC1	6 AM	70˚F (21˚C)	78˚F (24˚C)
	Leave/UNOCC1	8 AM	62˚F (17˚C)	85˚F (28˚C)
	Return/OCC2	6 PM	70˚F (21˚C)	78˚F (24˚C)
	Sleep/UNOCC2	10 PM	62˚F (17˚C)	82˚F (26˚C)
Saturday	Wake/OCC1	6 AM	70˚F (21˚C)	78˚F (24˚C)
	Leave/UNOCC1	8 AM	62˚F (17˚C)	85˚F (28˚C)
	Return/OCC2	6 PM	70˚F (21˚C)	78˚F (24˚C)
	Sleep/UNOCC2	10 PM	62˚F (17˚C)	82˚F (26˚C)
Sunday	Wake/OCC1	6 AM	70˚F (21˚C)	78˚F (24˚C)
	LeaveUNOCC1	8 AM	62˚F (17˚C)	85˚F (28˚C)
	Return/OCC2	6 PM	70˚F (21˚C)	78˚F (24˚C)
	Sleep/UNOCC2	10 PM	62˚F (17˚C)	82˚F (26˚C)

Factory Default Program for 2 Time Periods

Day of the Week	Events	Time	Setpoint Temperature (HEAT)	Setpoint Temperature (COOL)
Weekday	OCCUPIED	8 AM	70˚F (21˚C)	78˚F (26˚C)
	UNOCCUPIED	6 PM	62˚F (17˚C)	85˚F (29˚C)
Saturday	OCCUPIED	8 AM	70˚F (21˚C)	78˚F (26˚C)
	UNOCCUPIED	6 PM	62˚F (17˚C)	85˚F (29˚C)
Sunday	OCCUPIED	8 AM	70˚F (21˚C)	78˚F (26˚C)
	UNOCCUPIED	6 PM	62˚F (17˚C)	85˚F (29˚C)

You can use the table on the next page to plan your customized program schedule if using 5+1+1.

Features

Filter Change & Other Reminders

If the filter change reminder is enabled, you will see a reminder in the display when your air filter needs changed. The reminder will be shown in the display after your system has run long enough to require an air filter change.
Resetting The Filter Change Reminder: When the reminder is displayed, you should change your air filter and reset the reminder by holding down the 3rd button from the left side of the thermostat for 3 seconds.

This thermostat also has other maintenance reminders (Humidity Pad, UV lamp, and IAQ Cell), that are reset with the same procedure.

Temporary & Permanent Hold Feature

• Temporary Hold: The thermostat will display HOLD and RUN SCHED on the bottom of the screen when you press the key. If you do nothing, the temperature will remain at this setpoint temporarily for 4 hours. The program setpoint will then replace the temporary setpoint.
• Permanent Hold: With a temporary hold set, If you press the HOLD key at the bottom of your screen, you will see HOLD appear below the setpoint temperature in the display. The thermostat will now permanently stay at this setpoint and can be adjusted using thekeys.
• To Return To the Program: Press the RUN SCHED key at the bottom of the screen to exit temporary and permanent holds.

Remote Sensor Operation

• Option #1 – Indoor / Local Temperature Sensor “ON”:
  • The displayed room temperature will display the average temperature of the thermostat and all remote sensors.
  • By pressing the far left (Prev Step) button, the average temperature of just the remote sensor(s) will be displayed briefly in the clock field.
• Option #1 – Indoor / Local Temperature Sensor OFF”:
  The displayed room temperature will only show the average temperature of the remote sensor(s).
• Option #2 – Outdoor:
  The outdoor temperature will alternate briefly with the clock display.
• Option #3 (Floor)
  By pressing the far left (Prev. Step) button, the temperature of the floor sensor will be displayed briefly in the clock field.

Specifications

• The display range of temperature :41˚F to 95˚F (5˚C to 35˚C)
• The control range of temperature:44˚F to 90˚F (7˚C to 32˚C)
• Load Rating:1 amp per terminal, 1.5 amp maximum all terminals combined
• Swing (cycle rate or differential): Heating is adjustable from 0.2˚ to 2.0˚ Cooling is adjustable from 0.2˚ to 2.0˚
• Power source:18 to 30 VAC, NEC Class II, 50/60 Hz for hardwire. 500 mA
• Operating ambient :32˚F to +105˚F (0˚C to +41˚C)
• Operating humidity:90% non-condensing maximum
• Dimensions of thermostat:4.7” W x 4.3” H x 0.9” D
• Frequency Range:2.4 GHz ISM radio band
• WIFI:Supporting 802.11 B/G/N Standards

REFERENCE:

Download Manual:

PRO1 T855ISH-Wifi Programmable Thermostat User Guide

https://device.report/energystar/2383693

Pro1 Technologies T855iSH Thermostat – Energy Star Certification

OTHER MANUALS

Pro1 Technologies T855iSH Non-Programmable Thermostat Installational Manual

Pro1 Technologies T855iSH Non-Programmable Thermostat Operational Manual

Pro1 Technologies T855iSH Non-Programmable Thermostat Product Specifications Guide

Pro1 Technologies T855iSH Thermostat User Manual