Johnson Controls T25 Manuals

Installation Instructions T25 Issue Date 05/27/14 T25 Two-Stage Room Thermostat Application Requirements T25 thermostats are for line- or low-voltage service requiring accurate control of two operating functions. There are two stages of control for heating and cooling with automatic changeover on three- and four-pipe fan coil installations and similar applications. Typical uses are for compressor controls, relays, valves, fan coils, and other applications where low differentials and accurate sensing are required. Installation IMPORTANT: Use this T25 Two-Stage Room Thermostat only as an operating control. Where failure or malfunction of the thermostat could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the thermostat. IMPORTANT : Utiliser ce T25 Two-Stage Room Thermostat uniquement en tant que dispositif de contrôle de fonctionnement. Lorsqu'une défaillance ou un dysfonctionnement du thermostat risque de provoquer des blessures ou d'endommager l'équipement contrôlé ou un autre équipement, la conception du système de contrôle doit intégrer des dispositifs de protection supplémentaires. Veiller dans ce cas à intégrer de façon permanente d'autres dispositifs, tels que des systèmes de supervision ou d'alarme, ou des dispositifs de sécurité ou de limitation, ayant une fonction d'avertissement ou de protection en cas de défaillance ou de dysfonctionnement du thermostat. Parts Included • 1 thermostat • 1 Allen wrench • 2 machine screws Dimensions Refer to Figure 1 for detailed dimensions of the T25 Two-Stage room Thermostat. Mounting Location Considerations Mount the thermostat about 4 to 5 ft. (1.2 to 1.5 m) above the floor on an interior wall, where it can sense the average room temperature. It is designed for vertical mounting and will produce the lowest operating differentials when installed in this position. Do not mount the thermostat where it may react to heat or cold from water pipes, windows, doors, lamps, sunlight, or other heat or cold sources. On unit heater applications, place the thermostat below and behind the heater in the path of air entering the unit, not in the path of discharge air. © 2014 Johnson Controls, Inc. 1 Part No. 24-9716-5, Rev. B www.johnsoncontrols.com

Master Catalog 125 Room Thermostats Section T Product Bulletin T25 Issue Date 1182 © 1982 Johnson Controls, Inc. 1 Code No. LIT-125640 T25 Type Two-Stage Room Thermostat Low or Line Voltage--Also for Automatic Changeover of Heating and Cooling Application T25 thermostats are for line or low voltage service requiring accurate control of two operating functions. Choice of functions include: • control of two stages of heating, such as two-rate unit heaters or duct furnaces, commercial heat pumps, etc. • control of two-stages of cooling, such as two-stage compressors, dual compressor units, etc. • automatic changeover control of heating and cooling on three and four pipe fan coil installations and similar applications; automatic changeover from heating to cooling for unit operation All Series T25 thermostats are designed for use only as operating controls. Where an operating control failure would result in personal injury and/or loss of property, it is the responsibility of the installer to add devices or systems that protect against, or warn of, a control failure. Typical uses are for compressor control, fan coils, etc. Two SPDT switches permit independent control circuits. Each switch may be wired to make or break the control circuit on rise in temperature. A removable jumper across the “common” terminals is supplied as standard. Features • Contact units are dependable, dusttight, field proven Pennswitches. • A sensitive liquid charged element and an efficient lever mechanism provides close operating differential without anticipators. Fig. 1 -- T25 Two-Stage Thermostat. • A bimetal thermometer is standard. • A semi-concealed high temperature stop, which can be set in the field, is built-in feature of the thermostat. • Attractive style matches other Johnson Controls thermostats and humidistats. General Description T25 thermostats have pleasing, contemporary styling that is adaptable to any decor. The thermometer is a dependable easy reading, bimetal pointer type. The liquid charged sensing element is formed to achieve maximum sensitivity to surrounding air temperature changes. (See Fig. 2.) Coupled with a highly efficient diaphragm and lever mechanism, the element actuates totally enclosed Pennswitch contact units to provide a low operating differential and dependable switching action without the necessity of either heating or cooling anticipators. Specifications

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. www.johnsoncontrols.com 1 of 2 T22 / T25 / T26 Series Line Voltage Wall Thermostat (Heating, Cooling, or Heating and Cooling) Code No. LIT-1922255 Issued February 1, 2009 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 • equipped with adjustable dial stops (T26 Series) 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 Applications Use for line voltage control of heating and cooling equipment. 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 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 Knob 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) Knob SPST, Energy Conservation Heating model, max. setting 75°F (24°C) None 2 (1.1) 1.0 T26A-15C (No thermometer) SPST, Energy Conservation Heating model, max. setting 65°F (18°C) COOLING T22JAA-1C Knob SPST Off-Auto – 2-1/4 (1.3) 1.3 T22JCC-1C Auto-Off-Fan T26J-7C (No thermometer) SPST, Energy Conservation Cooling model, min. setting 75°F (24°C) None T26J-9C (No thermometer) SPST, Energy Conservation Cooling model, min. setting 78°F (26°C) 2 (1.1) 1.0 T26 T25 T22