Honeywell T678, T675 PRODUCT DATA
T675/T678
REMOTE BULB TEMPERATURE CONTROLLER
PRODUCT DATA
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.
The sensing element is connected to the controller by means of a liquid filled capilliary tube of specified length.
The T675 provides a single SPDT switching action with adjustable differential by means of a variable switch air gap.
The T678 provides two stage SPDT switching action with adjustable inter-stage differential.
EN0R8445
SPECIFICATIONS
Supply voltage |
: 120 ... 230 V~, 50 ... 60 Hz |
|
Switch action |
: |
T675 - SPDT MICRO SWITCH |
|
|
T678 - 2 x SPDT MICRO SWITCHES |
Switch rating |
: 8.0 A @ 120 V~, 5.1 A @ 230 V~ full |
|
|
|
load |
|
|
48.0 A @ 120 V~, 30.6 A @ 230 V~ |
|
|
locked rotor |
Operating |
: |
52oC Maximum |
temperature |
|
|
Operating |
: |
345 kPa Maximum |
pressure |
|
|
Adjustment |
: |
Knob on dial |
Differential |
: 1.7 to 5.6 K adjustable (T675 only) |
|
|
|
1.7 fixed (T678 only) |
lnterstage |
: 1.7 to 5.6 K adjustable (T678 only) |
|
differential |
|
|
Mounting |
: Surface mounting using slotted holes in |
|
|
|
back of case |
Bulb |
: 13 x 106 mm (1/2" dia. x 43/16") |
|
dimensions |
|
|
Capilliary length |
: |
1.5 m (5') |
Case |
: 143 x 51 x 67 (55/8" x 2" x 25/8") h x w x d |
|
Dimensions |
|
|
ORDERING SPECIFICATION
Model |
Setpoint Range |
Maximum |
|
|
Element |
|
|
Temperature |
|
|
|
T675A1607 |
-15..35o C |
52o C |
T675A1615 |
30..80o C |
93o C |
T675A1623 |
75.. 125o C |
138o C |
T678A1551 |
-15..35o C |
52o C |
T678A1577 |
30..80o C |
93o C |
IMPORTANT
1.The installer must be a trained service engineer
2.Disconnect the power supply before beginning installation
DIMENSIONS
Dimensions in millimetres (inches in brackets)
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.
WIRING
Honeywell Control Systems Limited |
Helping You Control Your World |
Newhouse Industrial Estate |
|
Motherwell ML1 5SB |
|
United Kingdom |
|
EN0R 8445
Loading...