Description
Remote bulb thermostats regulate temperature of air or liquids in ducts, pipes, tanks and boilers.

Features:
  • 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.


Specifications:
  • Description: Remote bulb Commercial Temperature Controller, 55 F to 175 F, 5 ft. capillary, Copper bulb sensing element
  • Application: Regulates temperature of air or liquids in ducts, pipes, tanks and boilers
  • Type: Remote bulb
  • Output Type: Relay
  • Output: 2 SPDT switch contacts
  • Voltage: 120 Vac or 240/277 Vac
  • Frequency: 50 Hz
  • Frequency: 60 Hz
  • Contact Ratings (120 Vac): 8.0 AFL, 48.0 ALR
  • Contact Ratings (240 Vac): 5.1 AFL, 30.6 ALR
  • Contact Ratings (277 Vac): 4.2 AFL, 25.2 ALR
  • Dimensions (in.): 5 5/8 in. high x 2 in. wide x 2 5/8 in. deep
  • Sensor Element: Copper bulb
  • Number of Sensor Inputs: 1
  • Capillary Length (ft): 5 ft
  • Capillary Length (m): 1.5 m
  • Bulb Size (in.): 1/2 in. x 3 9/16 in.
  • Setpoint Temperature Range (F): 55 F to 175 F
  • Maximum Operating Temperature (F): 200 F
  • Interstage Differential Temperature (F): 3.6 F to 12 F adjustable
  • Differential Temperature (F): 3.6 F fixed
  • Comments: Maximum connected load = 2000VA
Read more
Specs
Application:
Remote Bulb Temperature
Commercial
Output:
Relay
2 SPDT
Voltage:
120v
240v
277v
Hertz:
60
50
Contact Ratings 120v:
48.0 ALR
8.0 AFL
Contact Ratings 240v:
5.1 AFL
30.6 ALR
Contact Ratings 277v:
25.2 ALR
4.2 AFL
Height:
5-5/8"
Width:
2"
Depth (Inches):
2-5/8"
Sensor Type:
Copper Fast Response Element
Sensor Inputs:
1
Capillary Length:
5 ft.
Bulb Size:
1/2" x 3-9/16"
Temperature Range (F):
55° to 175°F
Min Temp (F):
55°F
Max Temp (F):
175°F
Max Operating Temp:
200°F
Differential:
3.6° to 12°F (Interstage Dif.)
3.6°F
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