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Selection chart Table 95: T22, T25, and T26 Series Line Voltage Wall Thermostat selection chart Differential approximately °F (°C) Product code number 1 Type of adjustment Application Selector switch Heating Cooling Shipping weight (lb) Heating T22AAA-1C Off-Auto T22ABC-1C Knob T22ABC-3C Concealed Single-pole, single-throw (SPST) 1-3/4 (1) T22BBC-1C SPST, medium duty T22CBC-1C Knob T22CBC-3C Concealed SPST, heavy duty Auto-Off-Fan 3 (1.7) 1.3 T26A-14C, no thermometer SPST, energy conservation heating model, maximum setting 75°F (24°C) T26A-15C, no thermometer Knob SPST, energy conservation heating model, maximum setting 65°F (18°C) None 2 (1.1) – 1.0 Cooling T22JAA-1C Off-Auto T22JCC-1C SPST Auto-Off-Fan T26J-7C, no thermometer SPST, energy conservation cooling model, minimum setting 75°F (24°C) 2-1/4 (1.3) 1.3 T26J-9C, no thermometer Knob SPST, energy conservation cooling model, minimum setting 78°F (26°C) None – 2 (1.1) 1.0 Heating and cooling T22SDA-1C Single-pole, double-throw (SPDT), permits system shutdown at the thermostat Off-Auto T22SEB-1C SPDT, used when the same device controls heating and cooling T22SFB-1C 2 SPDT, used to control separate loads on heating and cooling 1-3/4 (1) 2-1/4 (1.3) T22TFB-1C 2 SPDT, heavy duty, used to control separate loads on heating and cooling Heat-Off-Cool 3 (1.7) 3 to 4 (1.7 to 2.2) 1.3 T26S-18C 3 SPDT 1-3/4 (1) 2-1/4 (1.3) T26T-3C 2 Knob SPDT, heavy duty None 3 (1.7) 3 to 4 (1.7 to 2.2) 1.0 Two-stage 1-3/4 (1) 2-1/4 (1.3) T25A-1C Knob T25A-16C Concealed Two SPDT switches: two-stage heating, cooling, or one-stage heating and one-stage cooling None 3 (1.7) between stages 1.5 1 For the thermostat guard, refer to G Series Thermostat and Humidistat Guards Catalog Page (LIT-1922145). 2 To also use the thermostat where one unit provides both heating and cooling, add a jumper between terminals 2 and 3. Refer to 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. You 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. 87 Refrigeration Products Catalog

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