Pro1 Technologies T855iSH User manual

T855iSH
Installation Manual
Pro1 Technologies
Toll Free: 888-776-1427
Web: www.pro1iaq.com
Hours of Operation: M-F 9AM - 6PM Eastern
Thermostat Application Guide
Description
Gas or Oil Heat
Electric Furnace
Heat Pump (No Aux. or Emergency Heat)
Heat Pump (With Aux. or Emergency Heat)
Multi-Stage Systems
Heat Only Systems
Cool Only Systems
Millivolt
Yes
Yes
Yes
Yes
Yes
No
Power Type
Hardwire (Common Wire)
Table of Contents
Installation Tips
Thermostat Quick Reference
Wiring
Wiring Diagrams
Technician Setup Menu
WIFI Tech Settings
Setting Humidity
Programming
Features
Remote Sensor Operation
Specications
Page
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.
Una version en espanol de este
manual se puede descargar en
la pagina web de la compania.
Rev. 2028
U.S. Registered Trademark. Patents pending
Copyright 2020 All Rights Reserved.
5-8
15-33
1
2-4
Yes
Yes
34
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.
Installation Tips
2
Note: To ensure a solid t between the
thermostat and the subbase:
1. Mount subbase to a at wall
2. Use screws provided
3. Drywall anchors should be ush with the wall
4. Wires should be pushed into the wall
Installation Tips
The thermostat should be installed approximately 4 to 5 feet above the
oor. Select an area with average temperature and good air circulation.
• 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
Wall Locations
Pick an installation location that is easy for the user to access. The temperature
of the location should be representative of the building.
Installation Tip
Do not install thermostat in these locations:
34
Installation Tips
35-37
Vertical Mount
Horizontal Mount For horizontal mount put one screw on
the left and one screw on the right.
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.
Mercury Notice
Failure to disconnect the power before beginning to install this product
can cause electrical shock or equipment damage.
Installation Tip: Electrical Hazard
For vertical mount put one screw on
the top and one screw on the bottom.
Subbase Installation
11-14
9-10
Wired Remote Sensing Yes
P.O. Box 3377
Springeld, MO 65808-3377
Any HVAC system up to 5H/3C with
standard low voltage controlled humidier.
Any HVAC system up to 5H/3C with standard
low voltage controlled de-humidier.
Yes
Yes
44
45
38-43
46

Getting to know your thermostat
Glow in the dark light button
Setpoint buttons
Program buttons
Menu button
Fan button
LCD Display
System button
Button access door
Thermostat Quick Reference
Getting to know your thermostat
Thermostat Quick Reference
Gently slide a screwdriver into the bottom edge
of the badge. Gently turn the screwdriver counter
clockwise. The badge is held on by a magnet in the
well of the button door. The badge should pry o
easily. DO NOT USE FORCE.
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.
56
78
Magnet in door
Use the bevel on lower ridge
Day of the Week
Setpoint Indicator: Displays the user selectable setpoint temperature.
Energy Ecient Globe: Indicates the setpoint temperature chosen is a
ecient choice.
Indicates the number of heating or cooling stages running
Keypad Lockout: Indicates the thermostat is in keypad lockout
Time of Day / Outdoor Temp / % Humidity
Hold Indicator: Displayed when the thermostat is in permanent hold
Indicates current room temperature
Indicates if heating or cooling equipment is running
WIFI Indicator: Indicates if WIFI is connected.
Fan Button: Changes the fan operation between Auto, IAQ,
and On.
System Button: Changes the system operation between O,
Cool, Auto, Heat, and Emergency Heat based on system tech
setting.
Program Menu Buttons: Shows dierent options during
programming.
Thermostat Quick Reference Thermostat Quick Reference

Terminal Designations
This thermostat is shipped from the factory to operate a conventional heating
and cooling system. This thermostat may also be congured for a heat pump
system. See the “heat pump”conguration step on page 16 of this manual to
congure the thermostat for heat pump applications.
Wiring
Terminal
2 Heat 2 Cool
Conventional
System
2 Heat 1 Cool
Heat Pump
System
4 Heat 2 Cool
Heat Pump
System
RC
RH
C
B
O
G
W/E
Y
Y2
W2
Transformer power
(cooling)
Transformer power
(heating)
Transformer
common
Fan relay
First stage
of heat
First stage
of cool
Second stage
of cool
Second stage
of heat
Transformer power
(cooling)
Transformer power
(heating)
Transformer
common
Fan relay
Emergency Heat
First stage of
heat & cool
N/A
Auxiliary heat
Transformer power
(cooling)
Transformer power
(heating)
Transformer
common
Wiring
Caution:
Electrical Hazard
All components of the control
system and the thermostat
installation must conform to
Class II circuits per the NEC Code.
Warning:
Do not overtighten terminal
block screws, as this can
damage the terminal block.
A damaged terminal block
can keep the thermostat
from tting on the subbase
correctly or cause system
operation issues.
Installation Tip
Max Torque = 6in-lbs.
Wiring
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 Gterminal.
Loosen the terminal block screws.
Insert wires then retighten the
terminal block screws.
Place nonammable insulation into
the wall opening to prevent drafts.
1.
2.
3.
Wiring Tips
C Terminal
This thermostat requires a 24V
common wire to the C terminal.
Wire Specications
Use shielded or non-shielded 18-22
gauge thermostat wire.
Failure to disconnect the power
before beginning to install this
product can cause electrical shock
or equipment damage.
Note:
In many heat pump systems with
no emergency heat relay, a jumper
can be installed between Eand
W2 to turn thermostat into a single
stage control for Emergency Heat
Operation.
910
11 12
Wiring Diagrams Wiring Diagrams
Typical 2H/2C System: 1Transformer
Typical 2H/2C System: 2Transformer
Typical Heat Only SystemWith Fan
Typical Cool-Only SystemWith Fan
FAN RELAY
HEAT RELAY
RC
RH
Y
C
W/E
G
C
R
L2
L1(HOT)
FAN RELAY
COMPRESSOR
RELAY
C
R
L2
L1(HOT)
RC
RH
Y
C
G
Power supply
Factory-installed jumper. Remove only when installing on 2-transformer systems
Use either O or B terminals for changeover valve
A 24VAC common connection is required with this thermostat.
W/E
REMOVE JUMPER
RC
RH
Y
C
W/E
G
W2
Y2
C
R
L2
L1(HOT)
C
R
L2
L1(HOT)
COMPRESSOR
RELAY
HEAT RELAY
FAN RELAY
RC
RH
Y
C
W/E
G
W2
Y2
COMPRESSOR
RELAY
FAN RELAY
HEAT RELAY 2
COMPRESSOR
RELAY 2
HEAT RELAY
C
R
L2
L1(HOT)
S1/S2 Remote Sensor Remote Sensor
Note:
In many systems with no emergency heat relay a jumper can be installed
between E and W2.
Outdoor temperature sensor, Indoor temperature sensors, and Slab sensor
wiring diagrams are located in R250S and R251S manuals.
Note: HHumidify Humidify
DDehumidify Dehumidify
Fan relay
Second stage of
auxiliary heat
Remote Sensor
Humidify
Dehumidify
First stage of
auxiliary heat
First stage of
heat & cool
Second stage
of heat & cool
5 Heat 3 Cool
Heat Pump
System
Transformer power
(cooling)
Transformer power
(heating)
Transformer
common
Fan relay
Second stage of
auxiliary heat
(5th stage of heat)
Remote Sensor
Humidify
Dehumidify
First stage of
auxiliary heat
(4th stage of heat)
First stage of
heat & cool
Second stage
of heat & cool
Reversing valve /
3rd stage of heat
& cool
Reversing valve /
3rd stage of heat
& cool
Reversing valve
/ congurable
terminal
Reversing valve
/ congurable
terminal
Reversing valve
/ congurable
terminal
Reversing valve
/ congurable
terminal
Reversing valve
/ congurable
terminal
Reversing valve
/ congurable
terminal
HEAT RELAY 2
COMPRESSOR
RELAY 2
Typical 2H/1C Heat Pump System
RC
RH
Y
C
W/E
G
W2
B
COMPRESSOR
RELAY
FAN RELAY
EMERGENCY
HEAT
C
R
L2
L1(HOT)
OCOOL
CHANGEOVER
VALVE
HEAT
CHANGEOVER
VALVE
If DEHUM relay requires a normally-energized input, set Dehumidify relay to NC
in Technician Setup.

Technician Setup Menu Technician Setup Menu
14
15 16
13
This feature allows the installer
to change the calibration of the
room temperature display. For
example, if the thermostat reads
70˚ and you would like it to read
72˚ then select +2.
OFF
This feature will ash a reminder
after the elapsed run time to
remind the user to change the
lter. A setting of “OFF”will
disable this feature.
Filter Change
Reminder
You can adjust the lter
change reminder from“OFF”
to 2000 hours of runtime in
50 hour increments.
Tech Setup Steps
Room
Temperature
Calibration 0˚F
You can adjust the room
temperature display to read
up to 4˚above or below the
factory calibrated reading.
Adjustment Options Default
LCD Will Show
FILTER
OF
0
This thermostat has a technician setup menu for easy installer
conguration. 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. Congure the installer options as desired using the table below.
Use the or 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.
Tech Setup Steps Adjustment Options Default
LCD Will Show
This setting will select the
terminal for medium fan speed
operations. The selected terminal
cannot be used for reversing valve
operations when heat pump is
enabled.
Use the and buttons to
select O/B terminals.
0
0
The swing setting often called
“cycle rate”,“dierential”or
“anticipation”is adjustable. A
smaller swing setting will cause
more frequent cycles and a larger
swing setting will cause fewer
cycles.
Cooling
Swing
The cooling swing setting
is adjustable from 0.2˚ to
2˚. For example: A swing
setting of 0.5˚ will turn the
cooling on at approximately
0.5˚ above the setpoint
and turn the cooling o at
approximately 0.5˚ below
the setpoint.
The swing setting often called
“cycle rate”,“dierential”, or
“anticipation”is adjustable. A
smaller swing setting will cause
more frequent cycles and a larger
swing setting will cause fewer
cycles.
Heating
Swing
0.5 0.5˚
The heating swing setting is
adjustable from 0.2˚ to 2˚.
For example: A swing setting
of 0.5˚ will turn the heating
on at approximately 0.5˚
below the setpoint and turn
the heating o at 0.5˚ above
the setpoint.
0.4˚
0.4
Swing Setting Tip
The second stage will turn on at 2x the swing setting. The second stage will
turn o 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 rst stage will turn
on at approximately 69.5˚F. The second stage will turn on at 69˚F. The second
stage will turn o at 69.5˚F and the rst will turn o at 70.5˚F. If the third
stage is used, it will turn on at 68.5˚F and turn o at approximately 69˚F.
COOL SWING
HEAT SWING
MED FAN TERM
CALIBRATE
PTAC Mode
This setting allows the thermostat
to operate a PTAC.This will allow
for multiple fan speeds selectable
in the next two tech settings.
Use the and buttons to
select ON/OFF. OFF
OF
PTAC MODE
This setting allows you to choose
the number of fan speeds the
thermostat will control.
G = Low Speed Fan
B/O = Medieum Speed Fan
Y2 = High Speed Fan
PTAC Fan
Speeds
(Only displayed
if PTAC mode is
“ON”)
2
2
FAN SPEEDS
When turned on the thermostat
will operate a heat pump. EM.
Heat will show as an option in the
system switch tech setting.
Use the and button to
adjust.
Heat Pump
OFF congures the
thermostat for conventional
systems.
ON congures the
thermostat for heat pump
systems.
OFF
OF
HEAT PUMP
Use the and buttons to
select , 2 or 3.
1. Speeds: ON, Auto
2. Speeds: Low, High, Auto
3. Speeds: Low, Med, High,
Auto
Default Heat Heat Options Cool Default Cool Options
PTAC (conventional)
PTAC (Heat Pump)
Heat Pump
Conventional
System Mode
1
2
2
2
1
2, 1
5, 4, 3, 2, 1
2, 1
1
1
2
2
1
1
3, 2, 1
3, 2, 1
Typical 2H/2C system with 24 VAC Humidier
Typical 2H/2C system with Dehumidify Terminal
L2
L1(HOT)
C
R
RC
RH
Y
C
G
W/E
W2
Y2
H
COMPRESSOR
RELAY
HUMIDIFIER
HEAT RELAY
FAN RELAY
HEAT RELAY 2
COMPRESSOR
RELAY 2
RC
RH
Y
C
W/E
G
W2
Y2
D
COMPRESSOR
RELAY
HEAT RELAY
FAN RELAY
HEAT RELAY 2
COMPRESSOR
RELAY 2
DEHUMIDIFIER
RELAY
L2
L1(HOT)
C
R
Typical 2H/2C system with Dry Contact Humidier
RC
RH
Y
C
W/E
G
W2
Y2
H
COMPRESSOR
RELAY
24V RELAY
NORMALLY-OPEN
TERMINALS
HEAT RELAY
FAN RELAY
HEAT RELAY 2
COMPRESSOR
RELAY 2
L2
L1(HOT)
C
R
DRY CONTACT
HUMIDIFIER
HUM
HUM
Wiring Diagrams Wiring Diagrams
Power supply
Factory - installed jumper. Remove only when installing on 2 transformer systems.
Use either O or B terminals for changeover valve.
A 24VAC common connection is required with this thermostat.
If DEHUM relay requires a normally-energized input, set Dehumidify relay to NC
in Technician Setup.
Typical 5H/3C Heat Pump System
RC
RH
Y
C
W/E
G
W2
Y2
COMPRESSOR
RELAY 1
FAN RELAY
AUXILIARY
HEAT 2
COMPRESSOR
RELAY 2
AUXILIARY
HEAT 1
C
R
L2
L1(HOT)
O
B
COOL
CHANGEOVER OR
COMPRESSOR 3
HEAT
CHANGEOVER OR
COMPRESSOR 3
PTAC Medium
Fan Speed
Terminal
(Only displayed
if PTAC mode is
ON and PTAC fan
speeds is set to 3)

Tech Setup Steps Adjustment Options Default
LCD Will Show
Technician Setup Menu Technician Setup Menu
This setting allows you to select
the number of heat and cool
stages.
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.
Electric or Gas
Fan Operation
(Only displayed if
heat pump is set
to“ON”)
Use and buttons to
change the setting.
Tech Setup Steps Adjustment Options Default
LCD Will Show
FAN SET
System
Stages 2H
GAS
Tech Setup Steps Adjustment Options DefaultLCD Will Show
Tech Setup Steps Adjustment Options Default
LCD Will Show
Technician Setup Menu
18
20
17
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 and keys for 3 seconds. You will see a lock in the display. To
unlock the display hold down the and keys for 3 seconds.
Technician Setup Menu
GAS
You can congure this thermostat
to have 2 or 4 programmable
time periods per day.
Time Periods
(Only displayed if
program optioin is
set to 5d or 7d)
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.
Use the or key to
select on or o.
ON
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
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
OFF
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.
You can congure 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.
Program
Options
Use the and button
to select 7d for 7 day or 0d
for non-programmable.
7d
19
System Set
Use the or buttons
until the desired application
is ashing. AUTO = (Auto
Changeover) Heat
Off
Cool
SYSTEM SET
AutoO
Em.Heat
Cool
You can congure the system
switch for the particular
application. Heat - O - Cool,
Heat - O, Cool - O, Heat - O -
Cool – Auto.
Note: Emergency Heat is available
in heat pump mode only.
Dual Fuel
Auxiliary For
Heat Pump
(Only displayed if
heat pump is set
to“ON”)
OFF
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.
SET
STAGES
2H2C
PROGRAM
7d
4
TIME
PERIODS
PRO
RECOVERY
This setting maximizes eciency
and equipment longevity by
increasing the heating and
cooling swing settings to 2°
during the unoccupied and leave
time periods. This will result in
signicantly fewer system cycles.
OFF
CYCLE MIN
OF
Keypad
Lockout
Keypad lockout allows you to
congure the thermostat so some
or all of the keys don’t function.
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
KEY
LOCKOUT
OF
OF
KEY CODE
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 conguration.
Third Stage of
Cool Terminal
Designation
(Only displayed
if stages of cool
is set to three on
previous setting)
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.
Use the and buttons to
select O/B.
O
3 COOL TERM
0
This feature allows the thermostat
to keep multiple stages of heat or
cool energized until the setpoint
is satised.
Satisfy
Setpoint
Staging
(Only displayed
if there are more
than one stage of
heat or cool)
Use the or buttons
to turn on of o.
SS STAGING
OF
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.
Staging
Delay
(Only displayed
if there are more
than one stage of
heat or cool)
Use the or key to
select OFF, 5, 10, 15, 30, 45,
60, or 90 minutes.
STAGING
DELAY
OF
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.
Minimum
Compressor
On Time
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 o. Use the
and buttons to
change the setting.
MIN COMP ON
OF OFF
OFF
OFF
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 o.
Compressor
Short Cycle
Delay ON
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.
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 o
for a short time to save energy in
some systems.
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
COMP DELAY
COOL FAN DL
OF
Use the or key to
select on or o.
Cycle
Minimizer
(Only displayed if
program optioin is
set to 5d or 7d)

22
23 24
Technician Setup Menu
Tech Setup Steps Adjustment Options Default
LCD Will Show Tech Setup Steps Adjustment Options Default LCD Will Show
This feature will congure 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.
IAQ Mode
Cycle
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 MODE CYCL
OF
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.
IAQ Minutes
Per Cycle
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”.
IAQ MODE MIN
11
Technician Setup Menu
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.
Contractor
Call 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
OF
PHONE NUMBER
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.
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 down
for 3 seconds.
Tech Setup Steps Adjustment Options Default
LCD Will Show
This feature allows you to display
temperatures in either Fahrenheit
or Celsius.
˚F or ˚C
˚F for Fahrenheit
˚C for Celsius ˚F
F OR C SET
F
o
You can select either a 12 or 24
hour clock setting.
12 or 24
Hour Clock
Use the or key to
select 12 or 24 hour clock. 12H
CLOCK SET
12
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.
Pre
Occupancy
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
PRE-OCC FAN
OF
The display light can be
congured to stay on all the
time or turn on when any key
is pressed. There are LOW and
HIGH selections for continuous ON
selection.
Display
Light
Use the and buttons
to select OFF, LOW, or HIGH.
OFF congures the display
light to come on when the
light key or any button is
pressed.
LOW congures 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 congures the display
light to remain on at high
intensity all the time.
ALWAYS ON LIT
dL
HARDWIRE ONLY
dL
LOW
Technician Setup Menu
Technician Setup Menu
Tech Setup Steps Adjustment Options Default
LCD Will Show
Keypad lockout with code
creation is displayed when
Keypad Lockout Code is turned on
(Basic, Partial or Full is selected).
Keypad
Lockout Code
Creation
(Only displayed
if keypad lockout
is set to Basic,
Partial, or Full)
KEY CODE
0000 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 eld will show all four
characters as 0s, with the rst
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
This feature allows you to set a
maximum heating setpoint limit.
The setpoint temperature cannot
be raised above this value.
Heat
Setpoint
Limit
This feature allows you to set a
minimum cooling setpoint limit.
The setpoint temperature cannot
be lowered below this value.
Cool
Setpoint
Limit
Use the or key to
select the minimum cooling
setpoint.
Use the or key to
select the maximum heat
setpoint and the minimum
cooling setpoint.
HEAT LIMIT
HE 90˚F
COOL LIMIT
CO 44˚F
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.
Temporary
Hold Hours
(Only displayed if
program option is
set to 5d or 7d)
Use the and
buttons to select 0, 1, 2, 3,
4, 5 and 6.
4
TEMP HOLDERS
4
21
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
congurable terminals (O/B) to
connect to the economizer.
Economizer
Mode
(This feature
cannot be used
with non-
programmable
PTAC mode, three
stages of cool,
fresh air, of free
cooling mode)
OFF
ECONOMIZER
OF
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.
Economizer
Terminal
Designation
(Only displayed
if economizer is
turned on)
O
ECON TERMINAL
O
B
Use the and buttons
to select ON or OF.
Use the and buttons
to select O/B.
This setting selects the minimum
number of minutes that the fresh
air damper will be energized.
Fresh Air
Minutes
Use the and buttons
to select 5, 10, 15, 20, 25,
30, 35, 40, 45, 50, 55 or 60
minutes. 5
40
FRESH AIR MIN

Technician Setup Menu Technician Setup Menu
Tech Setup Steps Adjustment Options Default
LCD Will Show
26
27 28
25
Technician Setup Menu Technician Setup Menu
Tech Setup Steps Adjustment Options Default
LCD Will Show Tech Setup Steps Adjustment Options Default LCD Will Show
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.
Balance
Point Run
Time
(Only displayed
if remote sensor
setting is set
to 2)
This feature will bring in outside
air for rst 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.
Free Cooling
(Only displayed
if remote sensor
setting is
set to 2)
O, 15, 30, 45, 60, 75, 90
BP RUN TIME
Use the and buttons
to select ON/OFF.
OFF
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.
Use the and buttons
to select O/B.
O
FREE COOLTRM
OF
O
This setting allows you to set
a maximum oor temperature
limit for heat. Heat will be locked
out when the oor temperature
is above this value. Note: Only
shows when REOP is set to 3.
Floor High
Limit
(Only displayed
if remote sensor
setting is set
to 3)
This setting allows you to set
a minimum oor temperature
limit for heat. Heat will turn on
automatically when the oor
temperature is below this value.
Note: Only shows when REOP is
set to 3.
Floor Low
Limit
(Only displayed
if remote sensor
setting is set to 3)
Use the or buttons to
select the High Limit for the
oor sensor.35 - 120
HIGH LIMIT
Use the or keys to
select the Low Limit for the
oor sensor.
35 - 120 50
86 86
50
LOW LIMIT
OF OFF
FREE COOLING
The temperature of the oor
sensor will be displayed.
Note: Only shows when REOP is
set to 3.
Use and buttons to adjust.
N/A
N/A
76
FLOOR TEMP
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
Sensor
(Only displayed
if remote sensor
setting is set to 1)
ON enables local T855SH
sensor. OFF disables local
T855SH sensor.
ON
LOCAL TEMP
Enables the use of up to sixteen
indoor sensors R251S. Note: Will
only show Remote Sensor is set
to 1 and LocalTemp Sensor is
set to on.
Number
of Indoor
Remotes
(Only displayed
if remote sensor
setting is set to 1)
You can use 1, 4, 9, or 16
indoor sensors. Refer to the
R251S Install Manual for de-
tailed connection information 1
NUMBER REMOTE
1
An outdoor temperature above
balance point will cause the
thermostat to energize theY
terminal(s) only in calls for heat.
An outdoor temperature below
balance point will cause the
thermostat to energize theW2
terminal only in calls for heat.
Dual Fuel
Balance
Point
(Only displayed
if remote sensor
setting is set to
2 and Dual Fuel
AUX = On)
Use the and buttons
to select OFF, 10, 15, 20, 25,
30, 35, 40, 45, 50 degrees.
OFF
BALANCE POINT
OF
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 theY terminal(s)
will energize and lockout theW2
terminal. When the outdoor
temperature falls below the
AUX CUT OUT selection and sits
above the AUX CUT IN selection,
the thermostat will allow theY
terminal(s) and theW2 terminal
to energize. When the outdoor
temperature is below the AUX
CUT IN selection, the thermostat
will only energize theW2 termi-
nal and lockout theY terminal(s).
Balance Point
Electric AUX
Cut Out
(Only displayed if
remote
sensor setting is
set to 2 and Duel
Fuel Aux if O)
Use the and buttons
to select 10, 15, 20, 25, 30,
35, 40, 45, 50 degrees.
OFF
40
AUX CUT OUT
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 theY terminal(s)
to energize and lockout theW2
terminal. When the outdoor
temperature falls below the
AUX CUT OUT selection and sits
above the AUX CUT IN selection,
the thermostat to allow theY
terminal(s) and theW2 terminal
to energize. When the outdoor
temperature below the AUX CUT
IN selection, the thermostat will
only energize theW2 terminal
and lockout theY terminal(s).
Balance Point
Electric AUX
Cut In
(Only displayed if
remote
sensor setting is
set to 2 and Duel
Fuel Aux if O)
Use the and buttons
to select 10, 15, 20, 25, 30,
35, 40, 45, 50 degrees.
OFF
40
AUX CUT IN
Tech Setup Steps Adjustment Options Default
LCD Will Show
You can congure the thermostat
for one of three remote sensor
applications: 0 No Sensor, 1
Indoor, 2 Outdoor, 3 Floor.
Remote
Sensor
Operation
(Only displayed
if a sensor is
connected
to S1 and S2
terminals) REMOTE MODE
00
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.
S1 / S2 Terminal
Options Mode Description Requires
1
2
3
Indoor
Outdoor
Floor
The local and remote temperatures are averaged.
The outdoor temperature is ashed in clock.
The oor temperature is shown in tech.
R251S
R250S
R250S
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.
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).
ON:Thermostat will enable
Fresh Air Mode for every time
periods.
OFF
FRESH AIR
OF
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.
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.)
Use the and buttons
to select O/B.
FRESH AIR TRM
0O
Fresh Air
Mode
(This setting
cannot be used
with PTAC, three
stages of cool,
or economizer
turned on)
Floor
Temperature
(Only displayed
if remote sensor
setting is set to 3)
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)

30
31 32
29
Technician Setup Menu
Technician Setup Menu
Tech Setup Steps Adjustment Options Default
LCD Will Show
You can congure the D terminal
as Normally-Open or
Normally-Closed.
NO = Normally Open
NC = Normally Closed
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 eld 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 anotherTech Setting:
following this one
Dehumidify
Relay
(Only shows if
dehumidify is set
to“ON”)
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.
DHM RELAY O/C
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
OF
NO
SUMMER AWAY
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 uctuate
based on outdoor temperature.
Use the and buttons
to select OFF, ON 1 or ON 2.
When ON 1 or ON 2 is
selected and humidity level
is adjusted, the thermostat
will revert to the original
humidity level after four
hours. See Automatic
Humidity Adjusting chart for
humidity ranges.
Please see revious page for
chart.
OFF
OF
Automatic
Humidity
Adjusting
(Only displayed
if remote sensor
setting is set to 2
and humidity is
turned“ON”) AUTO HUMIDITY
Summer
Away Mode
(Only displayed
if dehumidity is
turned“ON”)
Tech Setup Steps Adjustment Options Default
LCD Will Show
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.
Over Cool
Limit
(Only displayed if
Dehumidify with
AC is turned“ON”)
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
Options for how the HUM
terminal energizes.
See chart below
HUM
Terminal
(Only shows if
humidify is set to
“ON”)
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
HUM TERMINAL
1
3
Options for how the DHM
terminal energizes.
See chart below
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
1
DUM
Terminal
(Only shows if
dehumidify is
set to“ON”) DUM TERMINAL
HUM Terminal DHM Terminal
OPTIONS
1
2
3
4
HUM terminal energizes when the ambient
humidity is...
Below the humidity setpoint and heat or
fan is energized.
Below the humidity setpoint and heat is
energized.
Below the humidity setpoint. It will also
energize the fan during a call for humidity.
Below the humidity setpoint.
OPTIONS
1
2
3
4
DUM terminal energizes when the ambient
humidity is...
Above the humidity setpoint and cool or fan
is energized.
Above the humidity setpoint. It will also
energize the fan during a call for dehumidity.
Above the humidity setpoint.
Above the humidity setpoint and the
compressor is not running.
Technician Setup Menu
Automatic Humidity Adjusting Index
When The Outdoor Temperature Is: On 2
> +40˚F
+30˚F to 40˚F
+20˚F to 29˚F
50%
On 1
45%
+10˚F to 19˚F
0˚F to 9˚F
-1˚F to -10˚F
-11˚F to -20˚F
<-20
45%40%
40%35%
35%30%
30%25%
25%20%
20%15%
15%10%
This table references dierent 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.
Technician Setup Menu
Tech Setup Steps Adjustment Options Default
LCD Will Show
This feature adds humidity when
system key is in HEAT.
Humidify
Use the and key to
turn on or o. 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
HUMIDIFY
OF
This feature removes humidity
when system key is in COOL.
Dehumidify
Use the and key to
turn on or o. 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.
DEHUMIDIFY
OF OFF
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
Dehumidify
With AC
(Only shows if
dehumidify is set
to“ON”)
DEHUMIDIFY AC
0F 0FF
Use the and buttons
to select O, 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 O is selected
the system will not use over
cooling.
This feature allows the installer
to change the calibration of the
ambient humidity displayed.
Humidity
Calibration
(Only shows
if Humidify or
Dehumidify is set
to“ON”)
Use the left and right arrows
to adjust the calibration +/-3.
Each one unit of adjustment
amounts to approximately 5%.
O
HUMIDITY CAL
OF

3433
Setting the Humidity
Technician Setup Menu
Tech Setup Steps Adjustment Options Default
LCD Will Show
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.
Comfort
Temperature
(Only displayed
if humidity is
turned“ON”)
Enables a reminder for the user to
change the humidity pad.
Humidity
Pad
Reminder
If ON is selected the ambient
temperature will operate
o of a combination of the
air temperature and the
relative humidity. When OFF
the ambient temperatures
will operate o 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.
COMFORT TEMP
Use the or key to
select OFF, 600, 1000, 1500,
or 2000. These represent
hours of heat operation.
OF
Enables a reminder for the user to
change the UV light bulb.
UV Lamp
Reminder
Use the or key to
select OFF, 1YR, 2 YR
OFF
UV LAMP
OFF
OFF
HUMIDITY PAD
Enables a reminder for the user
to change the IAQ Cell after
25,000 hrs.
IAQ Cell
Reminder
Use the or buttons to
select OFF, or 25 (stands for
25,000 hours).
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.
Summer
Away Mode
Humidity
Use the and buttons
to select the humidity level
for Summer Away Mode.
OFF
75
IAQ CELL
OFF
SUMMER AWAY
Humidity %
OFF
OFF
OFF
Ambient
Temperature 20%-25% 26%-35% 36%-45% 46%-55% 56%-65% 66%-75% 76%-85% 86%-90%
Comfort Temperature Index
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
50 50 50 50 50 50 50 50
50.6 50.7 50.7 50.9 51 51 51 51.2
51.2 51.5 51.5 51.7 52 52 52 52.5
52.3 52.5 52.5 52.8 53 53 53 53.5
52.9 53.3 53.3 53.6 54 54 54 54.8
53.5 54 54 54.5 55 55 55 56
54.1 54.6 54.7 55.3 56 56 56 57
54.7 55.2 55.4 56.2 56.9 56.9 56.9 57.9
55.8 56.3 56.6 57.3 58.1 58.1 58.1 59.1
56.4 56.9 57.3 58.2 59 59 59 60
57 57.5 58 59 60 60 60 61
58 58.5 59.1 60.1 60.9 60.9 61.1 61.9
58.9 59.4 60.1 61.1 61.9 61.9 62.1 62.9
60.1 60.6 61.4 62.4 63.1 63.1 63.4 64.1
61 61.6 62.4 63.4 64.1 64.1 64.4 65.1
62 62.5 63.5 64.5 65 65 65.5 66
62.7 63.3 64.3 65.3 65.9 65.9 66.5 66.9
63.4 64.1 65.1 66.1 66.8 66.8 67.6 67.8
64.6 65.4 66.4 67.4 68.2 68.2 68.9 69.2
65.3 66.2 67.2 68.2 69.1 69.1 70 70.1
66 67 68 69 70 70 71 71
67.2 68.2 69.1 70.1 71.1 71.4 72.4 72.6
68.3 69.3 70.3 71.3 72.3 72.8 73.8 74.3
69.7 70.7 71.7 72.7 73.7 74.2 75.2 75.8
70.8 71.9 72.9 73.9 74.9 75.6 76.6 77.4
72 73 74 75 76 77 78 79
72.9 73.9 74.9 76.1 77.1 78.6 79.6 80.6
73.8 74.7 75.7 77.2 78.2 80.2 81.2 82.7
75.2 76.3 77.3 78.8 79.8 81.8 82.8 84.3
76.1 77.1 78.1 79.9 80.9 83.4 84.4 86.2
77 78 79 81 82 85 86 88
77.9 79.1 80.3 82.3 83.6 86.6 88.3 91
78.7 80.2 81.7 83.7 85.1 88.1 90.6 94.1
80.3 81.8 83.3 85.3 86.9 89.9 92.4 96
81.1 82.9 84.7 86.7 88.4 91.4 94.7 99
82 84 86 88 90 93 97 102
82.8 85.1 87.3 89.5 92 95.8 100.5 106.4
83.7 86.1 88.6 91.1 94.1 98.5 104 110.9
85.3 87.9 90.4 92.9 96 100.5 106.1 113.1
86.2 88.9 91.7 94.5 98 103.2 109.5 117.6
67
87 90 93 96 100 106 113 122
35
Setting Target Humidity Setpoint
Follow the steps below to change your target humidity setpoint.
Press the HUMIDITY key
Use the or 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.
Humidity Reading
Press key for
Humidity Reading
36
Setting the Humidity Setting the Humidty
WIFI Technician Setup Menu
This step allows you to reset the
thermostats WIFI connection
to change to a dierentWIFI
network.
WIFI
Provisioning
Reset
Press and holdYES for three
seconds to reset.
This step shows the version of
rmware that is installed on the
thermostat.
Firmware
Version
SSID
Number
This step shows the SSID number
of the thermostat. (The network it
is connected to)
Press NEXT to move to the
next step. Press DONE to exit.
WIFI Menu Adjustment Options Default
LCD Will Show
These steps/options are only used for trouble shooting, re-setting or
restoring to default the WIFI settings of the thermostat. They are not
needed for installation or initial setup.
1. Press the MENU button.
2. Press the WIFI button.
3. Congure the WIFI options as desired using the table below.
Use the + or - 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 WIFI Menu
DELETE
NETWORK
SSId
SSId HERE
N/A
N/A
N/A
Press NEXT to move to the
next step. Press DONE to exit.
(Only displayed
if summer away
mode is turned
“ON”)

Programming
Custom Program
Day of
the Week Events Time Setpoint
Temperature
(HEAT)
Setpoint
Temperature
(COOL)
Weekday
Saturday
Sunday
Wake/OCC1
Leave/UNOCC1
Return/OCC2
Sleep/UNOCC2
Wake/OCC1
Leave/UNOCC1
Return/OCC2
Sleep/UNOCC2
Wake/OCC1
LeaveUNOCC1
Return/OCC2
Sleep/UNOCC2
Occupied
Unoccupied
Occupied
Unoccupied
Occupied
Unoccupied
3837
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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 ashing. Use the or key to
select the current day of the week.
4. Press NEXT.
5. The current hour is ashing. Use the or key 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 ashing. Use the or key 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.
Programming
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 eld. 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.
Programming
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 rst, 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 ashing. Use the or key to make your time
selection for that day’s WAKE/OCC1 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 ashing. Use the or key
to make your setpoint selection for that day’s WAKE/OCC1
period.
7. Press NEXT.
8. 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.
To customize your 7 day 4 time period Program schedule, follow
these steps:
Monday:
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 satised 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.
Setting the Humidity
Setting Target Humidity Setpoint
Ambient humidity will ash in the time eld when Humidify or De-Humidify is
set to ON.
HON will also ash when the Humidity terminal is energized. dON will also
ash when the De-Humidify terminal is energized.
DAY AND TIME AMBIENT HUMIDITY HON
(Humidity Energized)
dON
(De-Humidity Energized)
10:03 36
Humidity
%
Recommended Heating Settings:
Increasing Humidity
The table below shows recommended indoor humidity levels in relation to
outdoor temperatures during heating (adding humidity).
Consult your professional HVAC technician for recommended settings for
your climate.
Recommended Cooling Settings:
Outside
Temperature (0˚F) Recommended Relative Humidity
+20˚ and above 35% to 40%
+10˚ 30%
0˚ 25%
-10˚ 20%
-20˚ 15%

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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.
1. Select HEAT or COOL with the SYSTEM key.
Note: You have to program heat and cool each seperately.
2. Press the MENU button (If menu does not appear rst 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 ashing. 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 ashing. 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.
Monday:
Repeat steps 4 through 8 for the remaining days of the week.
To customize your 7 day 2 time period program schedule, follow
these steps:
Programming
Programming
Default Programming
Factory Default Program
Day of
the Week Events Time Setpoint
Temperature
(HEAT)
Setpoint
Temperature
(COOL)
Weekday
Saturday
Sunday
Wake/OCC1
Leave/UNOCC1
Return/OCC2
Sleep/UNOCC2
Wake/OCC1
Leave/UNOCC1
Return/OCC2
Sleep/UNOCC2
Wake/OCC1
LeaveUNOCC1
Return/OCC2
Sleep/UNOCC2
6 AM
8 AM
6 PM
10 PM
6 AM
8 AM
6 PM
10 PM
6 AM
8 AM
6 PM
10 PM
70˚F (21˚C)
62˚F (17˚C)
70˚F (21˚C)
62˚F (17˚C)
70˚F (21˚C)
62˚F (17˚C)
70˚F (21˚C)
62˚F (17˚C)
70˚F (21˚C)
62˚F (17˚C)
70˚F (21˚C)
62˚F (17˚C)
78˚F (24˚C)
85˚F (28˚C)
78˚F (24˚C)
82˚F (26˚C)
78˚F (24˚C)
85˚F (28˚C)
78˚F (24˚C)
82˚F (26˚C)
78˚F (24˚C)
85˚F (28˚C)
78˚F (24˚C)
82˚F (26˚C)
Programming
Factory Default Program for 2 Time Periods
Day of
the Week Events Time Setpoint
Temperature
(HEAT)
Setpoint
Temperature
(COOL)
Weekday
Saturday
Sunday
OCCUPIED
UNOCCUPIED
OCCUPIED
UNOCCUPIED
OCCUPIED
UNOCCUPIED
8 AM
6 PM
6 PM
6 PM
8 AM
70˚F (21˚C)
62˚F (17˚C)
78˚F (26˚C)
85˚F (29˚C)
8 AM 70˚F (21˚C)
62˚F (17˚C)
70˚F (21˚C)
62˚F (17˚C)
78˚F (26˚C)
85˚F (29˚C)
78˚F (26˚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.
Default Programming
If the lter change reminder is enabled, you will see a reminder in
the display when your air lter needs changed. The reminder will
be shown in the display after your system has run long enough to
require an air lter change.
Resetting The Filter Change Reminder: When the reminder is
displayed, you should change your air lter 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.
Filter Change & Other Reminders
Temporary Hold: The thermostat will display HOLD and RUN SCHED
on the bottom of the screen when you press the or
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 the
or keys.
To Return To Program: Press the RUN SCHED key at the bottom of
the screen to exit temporary and permanent holds.
Temporary & Permanent Hold Feature
Features

Specications
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 dierential) ...... 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
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Specications
Remote Sensor Operation
Option #1 - Indoor / Local Temperature Sensor “ON”:
1. The displayed room temperature will display the average
temperature of the thermostat and all remote sensors.
2. By pressing the far left (Prev Step) button, the average temperature
of just the remote sensor(s) will be displayed briey in the clock eld.
Option #1 - Indoor / Local Temperature Sensor OFF”:
1. The displayed room temperature will only show the average
temperature of the remote sensor(s).
Option #2 - Outdoor:
1. The outdoor temperature will alternate briey with the clock
display.
Option #3 (Floor)
1. By pressing the far left (Prev. Step) button, the temperature of the
oor sensor will be displayed briey in the clock eld.
Remote Sensor Operation Options