Johnson Controls T25 Series, T26 Series Data Sheet
Series T25
Action on Increase
of Temperature
R
B
Y
Low Stage
R
B
Y
High Stage
SeriesT26
Action on Increase
of Temperature
1
2
3
t28cd.eps
t28cd.eps
T25, T26 Series Action Diagrams
T25 Series Line Voltage
Wall Thermostat
T22 Series Line Voltage
Wall Thermostat
T25 Series Line Voltage
Wall Thermostat
Multi-Stage Electromechanical Temperature Controls
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.
Refer to the following documents for important
product application information:
• T22 Series Line Voltage Thermostats with
Selector Switch Product Bulletin
(LIT-125630)
• T25 Two-Stage Room Thermostat Product
Bulletin (LIT-125640)
• T26 Series Line Voltage Thermostats
Product Bulletin (LIT-125645)
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
• equipped with adjustable dial stops
(T26 Series)
Code No. LIT-1922255
Specifications
Temperature range is 40 to 90°F (5 to 30°C),
except energy conservation models.
Accessories
• replacement knobs and faceplates
• for double trim plate for mounting two T22s
or T26s
Repair Information
If the T22/T25/T26 Series Line Voltage Wall
Thermostat (Heating, Cooling, or Heating and
Cooling) fails to operate within its
specifications, replace the unit. For a
replacement thermostat, contact the nearest
Johnson
Controls®
representative.
Applications
Use for line voltage control of heating and
cooling equipment.
The performance specifications are nomina l and con form to accep table ind ustry stand ards. For applicati ons at con ditions be yond these specification s, consult th
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc.
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Multi-Stage Electromechanical Temperature Controls
T22/T25/T26 Series Line Voltage Wall Thermostat (Heating, Cooling, or
Heating and Cooling) (Continued)
Selection Chart
Product Code
Number
T22AAA-1C Knob Single-Pole, Single-Throw (SPST) Off-Auto 1-3/4 (1) – 1.3
T22ABC-1C Auto-Off-Fan
T22ABC-3C Concealed
T22BBC-1C Knob SPST, medium duty 3 (1.7)
T22CBC-1C SPST, heavy duty
T22CBC-3C Concealed
T26A-14C
(No Thermometer)
T26A-15C
(No Thermometer)
T22JAA-1C Knob SPST Off-Auto – 2-1/4 (1.3) 1.3
T22JCC-1C Auto-Off-Fan
T26J-7C
(No Thermometer)
T26J-9C
(No Thermometer)
T22SDA-1C Knob Single-Pole, Double-Throw (SPDT),
T22SEB-1C SPDT, used when the same device
T22SFB-1C
T22TFB-1C
T26S-18C
T26T-3C
T25A-1C Knob Two SPDT switches
1. For the thermostat guard, refer to G Series Thermostat and Humidistat Guards (LIT-1922145).
2. Can also be used where one unit provides both heating and cooling by adding a jumper between terminals 2 and 3. Refer to Typical Wiring Diagram and
3. Includes a faceplate for horizontal mounting. The plate is for on-the-job installation over a vertical plate.
1
2
2
3
2
Electrical Ratings for Line Voltage Thermostats (LIT-1922600).
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®
-72, -79, -500, TX550.
T26T-3 replaces: Honeywell T4051A, -B, T6051A; White-Rodgers 151-6, 152-9, 159-3, -5.
Typ e o f
Application Selector
Adjustment
Heating
Knob SPST, Energy Conservation Heating
model, max. setting 75°F (24°C)
SPST, Energy Conservation Heating
model, max. setting 65°F (18°C)
Cooling
SPST, Energy Conservation Cooling
model, min. setting 75°F (24°C)
SPST, Energy Conservation Cooling
model, min. setting 78°F (26°C)
Heating and Cooling
permits system shutdown
at the thermostat
controls heating and cooling
SPDT, used to control separate
loads on heating and cooling
SPDT, heavy duty, used to control
separate loads on heating and cooling
SPDT None 1-3/4 (1) 2-1/4 (1.3) 1.0
SPDT, heavy duty 3 (1.7) 3 to 4 (1.7 to 2.2)
Two -Sta ge
Two-stage heating, cooling or onestage heating and one-stage cooling
Switch
None 2 (1.1) 1.0
None
Off-Auto 1-3/4 (1) 2-1/4 (1.3) 1.3
Heat-Off-Cool
None 1-3/4 (1) 2-1/4 (1.3) 1.5
Heating Cooling
2 (1.1) 1.0
3 (1.7) 3 to 4 (1.7 to 2.2)
3 (1.7) between stagesT25A-16C Concealed
Wt. (lb)
TA500, TH71,
Differential Approximately C° (F°) Shipping
The performance specifications are nomina l and con form to accep table ind ustry stand ards. For applicati ons at con ditions be yond these specification s, consult th
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc.
R-68
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