Comfort System™
T-21-P Touchscreen Thermostat
User Manual
Version 1.40
INTRODUCTION
Your new Comfort System™ T-21-P touch screen thermostat has been manufactured using the
highest quality components and design currently available. As a result, when properly installed and
configured by a professional heating and air conditioning contractor, the T-21-P will provide years of
trouble-free operation.
The T-21-P has been designed to be an attractive, highly reliable and easy-to-use thermostat. By
taking time to read and understand this User Manual, you can take advantage of the many features
offered in this premium product.
Great care has been taken in the preparation of this manual. Jackson Systems takes no
responsibility for errors or omissions contained in this document. It is the responsibility of the user to
ensure that this thermostat, or equipment connected to it is operating to their respective
specifications and in a safe manner.
Due to ongoing product improvements, Jackson Systems reserves the right to change the
specification of the T-21-P thermostat (or its components) without notice.
All right reserved © Jackson Systems, LLC 2011
Intellectual rights apply.
BASIC FUNCTIONS
To simplify use, the T-21-P only displays information relevant to the current mode of operation. When
adjustments are required, the thermostat will display additional functions.
Time and Day
(only shown in
programmable mode)
Touch to set day and time
Fan
Touch to select
Automatic or
Always On
operation
Program
(only shown in
programmable mode)
PM
Day
To override programmable mode,
touch the icon until
appears. This will allow manual
operation of the thermostat. Touch
the icon until appears
to resume programmable mode.
Heat Set
Hold
Hold Program
Heat
Program Hold
Space temperature
Heat, Cool, Auto,
Set temperature
(displayed or hidden based on
thermostat configuration)
(always displayed)
Mode
Touch to select
Off or E. Heat
1
BASIC FUNCTIONS
Some symbols and display functions are normally hidden from view until needed or may not appear
based on the thermostat configuration. Make sure your contractor configures the T-21-P to suit your
specific needs.
Lock
Padlock symbol
the setpoint limit
has been reached
Battery
Flt (Filter)
Optional filter reminder
alternates with
the current time
(Reset by touching both
Mode and Fan)
Clean Screen
Touching this button
when shown will lock
out all thermostat functions
for 30 seconds to
permit cleaning
the display screen
Clean
Screen
Day
Up and Down Arrows
Used to set temperature,
time, day of week
and other values
Heat Set
indicates that the selected
function is prohibited or
Locked
Heat
Shown when battery
needs to be replaced
RESIDENTIAL 5-2 DAY PROGRAMMING MODE
Setting the clock
Touch the clock on the display. The day of the week will flash. Use the UP and DOWN arrows to
adjust the day. Touch the clock again. The hour will flash. Use the UP and DOWN arrows to adjust
the hour. If the time is PM, adjust the hour until the PM symbol appears. Touch the clock again. The
minutes will flash. Use the UP and DOWN arrows to adjust the minutes. Touch the clock again and
the thermostat will resume normal operation.
E
E
2
Mode selection
The T-21-P can control both heating and cooling. Touch the Mode box to cycle through and select
available modes. Based on equipment and thermostat configuration, mode selection can be as
follows:
Off
- Thermostat will not call for heating or
cooling.
Heat
- Thermostat only controls heating.
When heating system is running,
flashes.
Cool
- Thermostat only controls cooling.
When cooling system is running,
flashes.
Auto
cooling. or will flash when
equipment is running.
E. Heat
systems should the compressor fail.
- Thermostat controls both heating and
Heat Cool
- Emergency heat for heat pump
Heat
Cool
PM
Day
Heat Set
Heat
E
Fan selection
Automatic Always OnTouch the Fan box to select or fan mode. In Automatic mode, the fan
operates with a heating or cooling call. If set to Always On, the fan will run continuously. If the
thermostat is turned Off while the fan is set to Always On, the fan will switch to Automatic mode but
can be set back to Always On for constant ventilation when the thermostat is Off.
PM
Day
Heat Set
Heat
E
3
Programming 4 daily events (5-2 schedule)
ProgramTouch and hold the box until the UP and DOWN arrows along with the flashing days of the
week appear. The program format starts with Monday through Friday. You will now be able to
program four schedules per day with individual heating and cooling setpoints for all five days of the
week. If the Programmable Fan option is ON, you may also program the fan operation for each
scheduled event.
Mon Tue Wed Thu Fri
E
Touch the Program box again and the start time for the Morning program will appear and the hour will
flash. Use the UP and DOWN arrows to adjust the Morning start time hour. Touch the Program box
again and the minutes will flash. Use the UP and Down arrows to adjust the minutes in 10 minute
increments.
Mon Tue Wed Thu Fri
Morning
E
4
Touch the Program box again and the Morning Heat Set temperature will appear and flash. Use the
UP and DOWN arrows to change the heating setpoint.
Mon Tue Wed Thu Fri
Morning
Heat Set
E
Touch the Program box again and the Morning Cool Set temperature will appear and flash. Use the
UP and DOWN arrows to change the cooling setpoint. Repeat the same steps for the Day, Evening
and Night programs. After the Night Cool Set temperature is confirmed, touch the Program box again
and Saturday and Sunday (Sat Sun) will flash. Repeat the same steps for the Saturday and Sunday
programs.
Mon Tue Wed Thu Fri
Cool
Set
Night
E
5
After the Saturday and Sunday Night Cool Set temperature is confirmed or Programmable Fan (if
used), the thermostat will resume normal operation in approximately 20 seconds. All scheduled
events will be saved in non-volatile memory.
Residential 5-2 Day FactoryDefault Schedule
Start Time Set Temperature
Schedule (Mon-Fri) (Sat-Sun) Heating Cooling
Morning 6:00 AM 6:00 AM 70 75
Day 8:00 AM 8:00 AM
Evening
Night 10:00 PM
6:00 PM
6:00 PM
10:00 PM
62
70
62
78
75
78
RESIDENTIAL 7-DAY PROGRAMMING MODE
Setting the clock
Touch the clock on the display. The day of the week will flash. Use the UP and DOWN arrows to
adjust the day. Touch the clock again. The hour will flash. Use the UP and DOWN arrows to adjust the
hour. If the time is PM, adjust the hour until the PM symbol appears. Touch the clock again. The
minutes will flash. Use the UP and DOWN arrows to adjust the minutes. Touch the clock again and
the thermostat will resume normal operation.
E
E
6
Mode selection
The T-21-P can control both heating and cooling. Touch the Mode box to cycle through and select
available modes. Based on equipment and thermostat configuration, mode selection can be as
follows:
Off
- Thermostat will not call for heating or
cooling.
PM
Day
Heat Set
Heat
Heat
- Thermostat only controls heating.
When heating system is running,
flashes.
Cool
- Thermostat only controls cooling.
When cooling system is running,
flashes.
Auto
cooling. or will flash when
equipment is running.
E. Heat
systems should the compressor fail.
- Thermostat controls both heating and
Heat Cool
- Emergency heat for heat pump
Heat
Cool
E
Fan selection
Automatic Always OnTouch the Fan box to select or fan mode. In Automatic mode, the fan
operates with a heating or cooling call. If set to Always On, the fan will run continuously. If the
thermostat is turned Off while the fan is set to Always On, the fan will switch to Automatic mode but
can be set back to Always On for constant ventilation when the thermostat is Off.
PM
Day
Heat Set
Heat
E
7
Programming 4 daily events (7 individual days)
ProgramTouch and hold the box until the UP and DOWN arrows along with the flashing days of the
week appear. The program format starts with Monday. You will now be able to program four
schedules per day with individual heating and cooling setpoints for each day of the week. If the
Programmable Fan option is ON, you may also program the fan operation for each scheduled event.
Mon
E
Touch the Program box again and the start time for the Monday Morning program will appear and the
hour will flash. Use the UP and DOWN arrows to adjust the Morning start time hour. Touch the
Program box again and the minutes will flash. Use the UP and Down arrows to adjust the minutes in
10 minute increments.
Mon
Morning
E
8
Touch the Program box again and the Morning Heat Set temperature will appear and flash. Use the
UP and DOWN arrows to change the heating setpoint.
Mon
Heat Set
Morning
E
Touch the Program box again and the Morning Cool Set temperature will appear and flash. Use the
UP and DOWN arrows to change the cooling setpoint. Repeat the same steps for the Day, Evening
and Night programs. After the Night Cool Set temperature is confirmed, touch the Program box
again and the copy symbol will appear. If you wish to copy the Monday schedule to additional days of
the week, use the UP and DOWN arrows to select
Mon
E
9
each additional day. For example, you might want to copy the Monday schedule to Tuesday and
Wednesday. Once you have selected the days, touch the Program key and the copy symbol will flash
confirming that the Monday schedule has been copied to the additional days selected. Touch the
Program key again and programming will commence with the next
non-scheduled day, which in the example would be Thursday.
Mon Tue Wed
E
To skip the copy feature and advance to the next day, simply press the Program key after the copy
symbol appears. You can program a different schedule for each day of the week.
The factory default schedule is the same as the 5-2 programming mode.
Tue
E
10
COMMERCIAL PROGRAMMING MODE
Setting the clock
Touch the clock on the display. The day of the week will flash. Use the UP and DOWN arrows to
adjust the day. Touch the clock again. The hour will flash. Use the UP and DOWN arrows to adjust
the hour. If the time is PM, adjust the hour until the PM symbol appears. Touch the clock again. The
minutes will flash. Use the UP and DOWN arrows to adjust the minutes. Touch the clock again and
the thermostat will resume normal operation.
E
E
Mode selection
The T-21-P can control both heating and cooling. Touch the Mode box to cycle through and select
available modes. Based on equipment and thermostat configuration, mode selection can be as
follows:
Off
- Thermostat will not call for heating or
cooling.
Heat
- Thermostat only controls heating.
When heating system is running,
flashes.
Cool
- Thermostat only controls cooling.
When cooling system is running,
flashes.
Auto
- Thermostat controls both heating and
cooling. or will flash when
equipment is running.
E. Heat
systems should the compressor fail.
Heat Cool
- Emergency heat for heat pump
Heat
Cool
PM
Day
Heat Set
Heat
E
11
Fan selection
Automatic Always OnTouch the Fan box to select or fan mode. In Automatic mode, the fan
operates with a heating or cooling call. If set to Always On, the fan will run continuously. If the
thermostat is turned Off while the fan is set to Always On, the fan will switch to Automatic mode but
can be set back to Always On for constant ventilation when the thermostat is Off.
PM
Day
Heat Set
Heat
E
Programming 2 daily events (7 Day or 5-2 Schedule)
ProgramTouch and hold the box until the UP and DOWN arrows along with the flashing days of the
week appear. The program format starts with Monday for 7-Day programming and Monday through
Friday for 5-2 programming. You will now be able to program two schedules per day (Day and Night)
with individual heating and cooling setpoints for each schedule. If the Programmable Fan option is
ON, you may also program the fan operation for each scheduled event.
Mon
E
12
Refer to the programming steps as outlined in the Residential 5-2 or 7-Day programming section.
The only difference is that two schedules per day (Day and Night) will be programmed.
Commercial Default Schedule
Start Time Set Temperature
Schedule 7 Days Per Week Heating Cooling
Day 6:00 AM 70 75
Night 10:00 PM
62
83
MANUAL MODE
When the T-21-P is configured for manual mode, it provides setpoint adjustment, Mode and Fan
selection only. The thermostat clock is hidden and no programming is necessary.
Typical Manual Mode Display
Heat Set
Heat
13
TROUBLESHOOTING
Display is blank - Check HVAC circuit breaker and reset if necessary.
- Make sure power switch at HVAC system is on.
- If thermostat is battery powered only, replace batteries.
Heating or cooling - Touch MODE to set system to Heat or Cool. Set the heating does not respond temperature a
few degrees above the space temperature or the cooling temperature a few degrees below the
space temperature. Heat or Cool should flash confirming that the thermostat is calling.
- The thermostat has a 4 minute equipment time delay for cooling and heat pump systems. Wait 4
minutes for the system to restart.
- Contact your installing HVAC contractor if T-21-P does not function properly.
5418 Elmwood Avenue, Indianapolis, IN 46203-6025
Toll Free: 888.652.9663 Fax: 317.227.1034
www.jacksonsystems.com
14
06-1074-080811
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