Honeywell T775A - Manual
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Table of Contents:
- Page 5 – INSTALLATION; Electrical Shock or Equipment Damage Hazard.; Location and Mounting; Sensor Location; CAUTION; Electrical Shock Hazard.
- Page 6 – WIRING; Do not use 24 Vac power at terminals 5 and 6 to
- Page 7 – OPERATION; Control Algorithm; Heating Mode Operation; Cooling Mode Operation; EXAMPLE; Contact Closure Override Input
- Page 8 – The T775 will not allow the user to program for both; Keypad Programming and Display; Programming Keys; Display
- Page 9 – Device Programming; Default Values
- Page 10 – CHECKOUT; Error Messages; Table 4. Temperature Offset Based on Wire Length.
- Page 11 – CHECKOUT EXAMPLE WITH SENSOR A = 68 AND SENSOR B = 73; CHECKOUT TABLE
- Page 16 – Automation and Control Solutions
PRODUCT DATA
63-2489—2
T775A,B,C,D
Remote Temperature Controller
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.
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.
T775A,B
T775A,B
Contents
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Wiring ...............................................................................
Checkout .......................................................................... 10
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Summary
T775A,B,C,D REMOTE TEMPERATURE CONTROLLER 5 63-2489—2 INSTALLATION When Installing this Product... 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 2. Check ratings given in instructions and on the product to ensure the product is ...
T775A,B,C,D REMOTE TEMPERATURE CONTROLLER 63-2489—2 6 Fig. 7. Sensor mounted on wall. Fig. 8. Parallel-series wiring of sensors. WIRING CAUTION Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry. Disconnect power supply before installation. CAUTION Do not...
T775A,B,C,D REMOTE TEMPERATURE CONTROLLER 7 63-2489—2 OPERATION Control Algorithm On/Off Control The T775AC operate with one temperature input supplied by the remote sensor while T775B,D have two temperature inputs. The T775A,B,C,D are all capable of providing up to four stages of on/off control rel...
