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Overview

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.

Product Specifications

Hazmat Information
UN 1993, FLAMMABLE LIQUID, N.O.S. (contains Isopropanol), 3, III
Application
Regulates temperature of air or liquids in ducts, pipes, tanks and boilers
Dimensions (in.)
5 5/8 in. high x 2 in. wide x 2 5/8 in. deep
Dimensions (mm)
143 mm high x 51 mm wide x 67 mm deep
Comments
Fast response model; maximum connected load = 2000VA
Item Type
Product
Frequency
50 Hz; 60 Hz
Approvals, Underwriters Laboratories Inc.
UL Listed: E4436, Vol. 4, Sec. 11, Guide XAPX
Approvals, Canadian Standards Association
CSA Listed: Report -1
Tradeline Value
Tradeline
Contact Ratings
120 Vac-- 8.0 AFL, 48.0 ALR; 240 Vac-- 5.1 AFL, 30.6 ALR; 277 Vac--4.2 AFL, 25.2 ALR
Voltage
120 Vac or 240/277 Vac
Setpoint Temperature Range (C)
-18 C to +38 C
Setpoint Temperature Range (F)
0 F to 100 F
Operating Temperature Range (F)
125 F Maximum
Operating Temperature Range (C)
52 C Maximum
Output
relay
Relay Outputs
2 SPDT switch contacts
Sensor Inputs
1
Sensor Element
Fast response capillary
Capillary Length (ft)
5 ft
Capillary Length (m)
1.5 m
Bulb Size (in.)
1/2 in. x 4 3/16 in.
Bulb Size (mm)
13 mm dia. x 106 mm long
Differential Temperature (F)
3 F fixed
Differential Temperature (C)
1.7 C fixed
Interstage Differential Temperature (C)
1.7 C to 5.6 C adjustable
Interstage Differential Temperature (F)
3 F to 10 F adjustable
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