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Honeywell T775A Product Data

Honeywell T775A Product Data

Remote temperature controller
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T775A,B,C,D
Remote Temperature Controller
T775A,B

APPLICATION

The T775 family of Electronic Remote Temperature
Controllers provide on-off temperature control for ducts, tanks,
chillers, heating and refrigeration units, and other applications
where electronic accuracy in addition to remote sensing is
desired.
In addition, certain models of the T775 family of controllers
provide on-off temperature control of heating, cooling, and
ventilating systems in agricultural confinement buildings,
storage areas and heavy industrial applications.
IMPORTANT
The T775 is an operating control, not a limit or safety
control. If used in applications requiring safety or limit
controls, a separate safety or limit control device
should be used in conjunction with the T775.
T775A,B

FEATURES

• T775A models provide staged on-off control with one
temperature input and one to four relay output stages.
• T775B models provide staged on-off control with two
temperature inputs and two to four relay output stages.
• T775C models provide staged on-off control with one
temperature input and four relay output stages.
• T775D models provide staged on-off control with two
temperature inputs and four relay output stages.
• T775C,D models meet National Electrical Code (Article
547) requirements for animal confinement buildings.
• Setpoint temperature range is -40° to +220°F (-40° to
+104°C).
• Ambient temperature range is -30° to +140°F for one
and two stage models and -30° to +125°F for three and
four stage models.
• Linear platinum temperature sensor with T775A,B.
• Water-tight linear platinum temperature sensor with
T775C,D.
• Adjustable temperature range and differential.
• LCD indication for mode and output status.
• Keypad provides ease of programming and operation.
• Accuracy is within +/- 1°F (at nominal operating
ambient temperature of 77°F and voltage input).
• Stage(s) independently programmed for heating or
cooling.
• 24/120/240 Vac input voltage.
• Spdt relay outputs.
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Wiring ...............................................................................
Checkout .......................................................................... 10
PRODUCT DATA
Contents
1
1
2
2
5
6
63-2489-2

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Summary of Contents for Honeywell T775A

  • Page 1: Table Of Contents

    Remote Temperature Controller PRODUCT DATA FEATURES • T775A models provide staged on-off control with one temperature input and one to four relay output stages. • T775B models provide staged on-off control with two temperature inputs and two to four relay output stages.
  • Page 2: Specifications

    If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory). 2. Honeywell Customer Care...
  • Page 3 M344C 7/8 (22) DIAMETER T775C,D: 121371A Copper Immersion Well. Fig. 1. Approximate dimensions of T775A,B in in. (mm). 121371E Stainless Steel Well. 107408 Heat Conduction Compound, 4 ounce. C7043A1098 Case and Immersion Well for running conduit to sensor.
  • Page 4 240V KNOCKOUT B KNOCKOUT C OUTPUT 3 OUTPUT 4 RELAY OUTPUT STAGES NOTE: T775A TERMINAL BLOCK CONTAINS ONLY (MAXIMUM OF FOUR STAGES) TERMINALS 1-6 AND HAS NO DIP SWITCHES FOR SENSOR SELECTION M7423 Fig. 3. Feature locations for T775A,B. LCD TEMPERATURE...
  • Page 5: Installation

    (mounting screws are not provided and must be SHIELDED OUTPUT 3 OUTPUT 4 obtained separately). Use controller dimensions in Fig. 1 CABLE (T775A,B) or Fig. 2 (T775C,D) as a guide. GROUNDING SCREW NOTE: DO NOT GROUND SHIELDED CABLE AT Sensor Location SENSOR END.
  • Page 6: Wiring

    T775A,B,C,D REMOTE TEMPERATURE CONTROLLER WIRING T7047C1090 WALLMOUNT SENSOR CASE (OPTIONAL) 193987GA CAUTION SENSOR LEADWIRES Electrical Shock or Equipment Damage Hazard. TO T775 Can shock individuals or short equipment circuitry. SCREW TERMINAL Disconnect power supply before installation. SCREW TERMINAL CAUTION Do not use 24 Vac power at terminals 5 and 6 to power any external loads if 120 Vac or 240 Vac is used to power the T775.
  • Page 7 T775B,D have two temperature Replacing the jumper reinstates the °F mode. inputs. The T775A,B,C,D are all capable of providing up to four stages of on/off control relay outputs. Each controller stage has NOTES: If, upon removing the jumper plug, the device does its own independent setpoint that can be configured to operate not display °C:...
  • Page 8 T775A,B,C,D REMOTE TEMPERATURE CONTROLLER Programming Keys The four programming keys are Select, Up and Down (arrows), For example: Load 1: Compressor 1 (cool) and Enter: Setpt 1 On at • Select: Sequentially prompts the user about what parameter Diff 1 Off at is being displayed.
  • Page 9 3-1/2 minutes. IMPORTANT NOTE: If, upon removing the jumper plug, the device 1. For the T775A and C only: After initial programming, does not display °C: altering the setpoints for stage 1 up or down results in (a)Remove power from the device.
  • Page 10: Checkout

    Calibration Offset sensor. Make sure that the sensors are connected 0 to 399 ft None required. properly. For T775A,C all loads de-energize when this error message flashes. 400 to 599 ft 1.0 degrees — For the T775B,D the loads controlled by the out-of- 600 to 799 ft 2.0 degrees...
  • Page 11 T775A,B,C,D REMOTE TEMPERATURE CONTROLLER CHECKOUT EXAMPLE WITH SENSOR A = 68 AND SENSOR B = 73 LOAD 1 LOAD 2 LOAD 3 LOAD 4 HEAT OR COOL (HEAT) (HEAT) (HEAT) (HEAT) MODE DIFFERENTIAL DESIGNATED SENSOR CLOSED SETPOINT OPEN SENSED TEMPERATURE...
  • Page 12 T775A,B,C,D REMOTE TEMPERATURE CONTROLLER COOL MODE C \ F TEMPERATURE FALL RELAY 1 AND 2 ENERGIZED SELECT ENTER DIFFERENTIAL SA SB SETPOINT 2 RELAY 1 ENERGIZED DIFFERENTIAL SENSOR A TEMPERATURE SENSOR NULL (HOT) RISE SETPOINT 1 24 VAC HEAT MODE...
  • Page 13 T775A,B,C,D REMOTE TEMPERATURE CONTROLLER 120 VAC INPUT; 120 VAC LOADS C \ F SELECT ENTER SA SB SENSOR A SENSOR OUTPUT 2 OUTPUT 1 120V 240V 120 VAC COOL MODE TEMPERATURE LOAD 1 LOAD 1 LOAD 2 LOAD 2 FALL...
  • Page 14 T775A,B,C,D REMOTE TEMPERATURE CONTROLLER 120 VAC INPUT; 120 VAC LOADS C \ F SELECT ENTER SA SB COOL MODE TEMPERATURE FALL RELAY 1,2,3 AND 4 SENSOR SENSOR SENSOR A ENERGIZED DIFFERENTIAL 4 RELAY 1,2 AND 3 SETPOINT 4 ENERGIZED OUTPUT 2...
  • Page 15 T775A,B,C,D REMOTE TEMPERATURE CONTROLLER C \ F SELECT ENTER SA SB SENSOR A SENSOR SENSOR (HOT) 24 VAC OUTPUT 2 OUTPUT 1 120V LOAD 1 LOAD 3 240V LOAD 4 LOAD 2 OUTPUT 3 OUTPUT 4 COOL MODE HEAT MODE...
  • Page 16 Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 customer.honeywell.com ® U.S. Registered Trademark © 2005 Honeywell International Inc. 63-2489—2 B.B. Rev. 07-05...

This manual is also suitable for:

T775bT775cT775d