Description
The Honeywell T678A1445 is a high-precision remote bulb temperature controller designed for commercial and industrial heating and cooling systems. With an adjustable temperature range of 55°F to 175°F, this rugged controller provides accurate control of air, liquids, and gases in HVAC, process, and refrigeration applications.
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
