• Suitable for applications requiring temperature control of air or liquids where controller must be placed outside the sensing area.
• Typical uses include control of dampers and valves in heating, cooling and heating-cooling systems.
• Fast response models (available for use in return air duct) operate approximately four times faster than standard models.
• Controller can be mounted in any position. Ambient temperature compensation provides good temperature control.
• Refer to T775 Electronic Remote Temperature Controller where more exact control is required and/or remote controller location is preferred.
• T678 models have a maximum connected load of 2000 VA.Changeover Temperature Controller, two stageInterstage Differential Temperature (C) | 3.9 C |
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Output | 2 SPDT switch contacts |
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Interstage Differential Temperature (F) | 7 F |
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Overview | Remote bulb thermostats regulate temperature of air or liquids in ducts, pipes, tanks and boilers. |
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Application | Changeover temperature control |
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Comments | Does not include enclosure |
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Bulb Size (in.) | 1/8 in. x 42 in. |
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Sensor Element | Copper bulb |
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Capillary Length (ft) | 17 ft |
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Bulb Size (mm) | 3 mm x 1064 m |
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Setpoint Temperature Range (F) | 40 F to 180 F |
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Capillary Length (m) | 5.2 m |
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Maximum Operating Temperature (F) | 210 F |
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Setpoint Temperature Range (C) | 4 C to 82 C |
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Maximum Operating Temperature (C) | 99 C |
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Differential Temperature (F) | 2 F |
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Voltage | 120 Vac or 240 Vac |
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Differential Temperature (C) | 1.1 C |
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Contact Ratings (120 Vac) | Control: 2.6 AFL, 15.6 ALR; Hi Limit: 7.4 AFL, 44.4 ALR |
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Contact Ratings (240 Vac) | Control: 1.3 AFL, 7.8 ALR; Hi Limit: 5.1 AFL, 30.6 ALR |
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Dimensions (in.) | 5 5/8 in. high x 2 in. wide x 2 5/8 in. deep |
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Dimensions (mm) | 143 mm high x 51 mm wide x 67 mm deep |
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Product Family
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