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Code No. LIT-1922255  
Issued February 1, 2009  
T22 / T25 / T26 Series  
Line Voltage Wall Thermostat  
(Heating, Cooling, or Heating and Cooling)  
Description  
For line voltage control of residential,  
commercial, or industrial heating or year-  
round air conditioning. Heat or cold  
anticipators are not required. The liquid-  
charged temperature sensing element and  
highly efficient diaphragm and leverage  
provide close temperature control.  
Features  
attractive beige colored, high-impact  
plastic enclosure (T26 Series)  
close differential without the need for  
anticipators  
bi-metal thermometer supplied as standard  
except where indicated  
T26  
T22  
T25  
equipped with adjustable dial stops  
(T26 Series)  
Applications  
Use for line voltage control of heating and cooling equipment.  
Specifications  
Series T25  
Temperature range is 40 to 90°F (5 to 30°C),  
except energy conservation models.  
SeriesT26  
3
Y
Y
Accessories  
replacement knobs and faceplates  
for double trim plate for mounting two T22s  
or T26s  
B
R
B
R
2
1
High Stage  
Low Stage  
Action on Increase  
of Temperature  
Action on Increase  
of Temperature  
T25, T26 Series Action Diagrams  
Selection Chart  
T22 / T25 / T26 Series Line Voltage Wall Thermostat (Heating, Cooling, or Heating and Cooling  
Code  
Number1  
Type of  
Adjustment  
Application  
Selector  
Switch  
Differential Approximately °C (°F)  
Ship  
Wt. (lb)  
Heating  
Cooling  
HEATING  
T22AAA-1C  
T22ABC-1C  
T22ABC-3C  
T22BBC-1C  
T22CBC-1C  
T22CBC-3C  
Knob  
SPST  
Off-Auto  
1-3/4 (1)  
1.3  
Auto-Off-Fan  
Concealed  
Knob  
SPST, Medium Duty  
SPST, Heavy Duty  
3 (1.7)  
2 (1.1)  
Concealed  
Knob  
T26A-14C  
(No thermometer)  
SPST, Energy Conservation Heating  
model, max. setting 75°F (24°C)  
None  
1.0  
T26A-15C  
(No thermometer)  
SPST, Energy Conservation Heating  
model, max. setting 65°F (18°C)  
COOLING  
T22JAA-1C  
T22JCC-1C  
Knob  
SPST  
Off-Auto  
Auto-Off-Fan  
None  
2-1/4 (1.3)  
2 (1.1)  
1.3  
1.0  
T26J-7C  
(No thermometer)  
SPST, Energy Conservation Cooling  
model, min. setting 75°F (24°C)  
T26J-9C  
(No thermometer)  
SPST, Energy Conservation Cooling  
model, min. setting 78°F (26°C)  
The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.  
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2009 Johnson Controls, Inc.  
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Line Voltage Wall Thermostat (Heating, Cooling, or Heating and Cooling) (Continued)  
T22 / T25 / T26 Series Line Voltage Wall Thermostat (Heating, Cooling, or Heating and Cooling (Continued)  
Code  
Number1  
Type of  
Adjustment  
Application  
Selector  
Switch  
Differential Approximately °C (°F)  
Ship  
Wt. (lb)  
Heating  
Cooling  
HEATING AND COOLING  
T22SDA-1C  
Knob  
SPDT, permits system shutdown  
at the thermostat  
Off-Auto  
1-3 /4 (1)  
2-1/4 (1.3)  
1.3  
T22SEB-1C  
SPDT, used when the same device  
controls heating and cooling  
Heat-Off-Cool  
2
SPDT, used to control separate  
loads on heating and cooling  
T22SFB-1C  
T22TFB-1C  
SPDT, heavy duty, used to control  
separate loads on heating and cooling  
3 (1.7)  
3 to 4 (1.7 to 2.2)  
3
SPDT  
None  
None  
1-3/4 (1)  
3 (1.7)  
2-1/4 (1.3)  
1.0  
1.5  
T26S-18C  
SPDT, heavy duty  
3 to 4 (1.7 to 2.2)  
T26T-3C  
TWO-STAGE  
T25A-1C  
Knob  
Two SPDT switches  
1-3/4 (1)  
2-1/4 (1.3)  
Two-stage heating, cooling or one  
stage heating and one stage cooling  
T25A-16C  
Concealed  
3 (1.7) between stages  
1. For the thermostat guard, refer to G Series Thermostat and Humidistat Guards Catalog Page, LIT-1922145.  
2. Can also be used where one unit provides both heating and cooling by adding a jumper between terminals 2 and 3. (See Typical Wiring Diagram and Electrical  
Ratings for Line Voltage Thermostats Catalog Page, LIT-1922600.)  
3. Includes a faceplate for horizontal mounting. The plate is for on-the-job installation over a vertical plate.  
Can field-convert to other configurations.  
The T26S-18 is a universal replacement for Honeywell T451A, -B, T651A; White Rodgers 179-1, 180-1, 181-1, 182-101, -102; Robertshaw TA500, TH71,  
-72, -79, -500, TX550.  
T26T-3 replaces: Honeywell T4051A, -B, T6051A; White-Rodgers 151-6, 152-9, 159-3, -5.  
The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.  
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2009 Johnson Controls, Inc.  
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