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[. . . ] REMOTE BULB TEMPERATURE CONTROLLER
PRODUCT DATA
T675/T678
FEATURES
· · · · · · · ·
Liquid filled remote bulb for accurate temperature sensing Ambient temperature compensation to eliminate control offset Snap acting SPDT MICRO SWITCH with adjustable differential (T675 only) Two snap acting SPDT MICRO SWITCHES for two stage operation with adjustable interstage differential (T678 only) Front mounted adjustment knob with large clear scale Temperature ranges to suit most air and liquid temperature control applications Robust steel surface mount housing with knock-out conduit entry Adjustable control differential (T675) or inter-stage differential (T678)
DESCRIPTION
The T675/T678 are two position remote bulb temperature controllers for controlling the temperature in ducts, tanks, boilers, etc. [. . . ] 60 Hz : T675 - SPDT MICRO SWITCH T678 - 2 x SPDT MICRO SWITCHES : 8. 0 A @ 120 V~, 5. 1 A @ 230 V~ full load 48. 0 A @ 120 V~, 30. 6 A @ 230 V~ locked rotor : 52oC Maximum : 345 kPa Maximum : Knob on dial : 1. 7 to 5. 6 K adjustable (T675 only) 1. 7 fixed (T678 only) : 1. 7 to 5. 6 K adjustable (T678 only)
DIMENSIONS
Operating temperature Operating pressure Adjustment Differential lnterstage differential Mounting Bulb dimensions
Dimensions in millimetres (inches in brackets) : Surface mounting using slotted holes in back of case : 13 x 106 mm (1/2" dia. x 43/16")
INSTALLATION
Mounting
The controller can be surface mounted in any position using the slotted holes on the rear. The bulb should be located where it will be exposed to the average temperature of the controlled medium. Do not kink or bend the capilliary tube sharply. Excess tubing should be coiled beneath the case.
Capilliary length : 1. 5 m (5') Case Dimensions : 143 x 51 x 67 (5 /8" x 2" x 2 /8") h x w x d
5 5
ORDERING SPECIFICATION
Model Setpoint Range Maximum Element Temperature 52o C 93o C 138o C 52 C 93o C
o
T675A1607 T675A1615 T675A1623 T678A1551 T678A1577
-15. . 35o C 30. . 80o C 75. . 125o C -15. . 35 C 30. . 80o C
o
WIRING
IMPORTANT 1. [. . . ] Disconnect the power supply before beginning installation
Honeywell Control Systems Limited Newhouse Industrial Estate Motherwell ML1 5SB United Kingdom
Helping You Control Your World
EN0R 8445 [. . . ]
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