Honeywell T775U- Manual

Honeywell T775U

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Table of Contents:

  • Page 2 – Actuators; Product Selection Tool
  • Page 3 – Controller Dimensions; BEFORE INSTALLATION; When Installing This Product; INSTALLATION AND SETUP; MOUNTING; Controller Mounting
  • Page 4 – WIRING; Wiring Connections Access; CAUTION; Reset Temperature Control
  • Page 5 – Temperature Sensor Wire Type and Size
  • Page 6 – connection from Sensor A to 0-10 Vdc sensor
  • Page 7 – Controller Wiring; WARNING; A separate earth ground is required.; Controller Wiring Method; Fig. 10. Attaching two or more wires at terminal
  • Page 8 – Controller Wiring Details
  • Page 9 – Fig. 13. Wiring for mod motor or direct coupled
  • Page 10 – CHECKOUT; Power Loss
  • Page 11 – INTERFACE OVERVIEW; Using the LCD Panel Interface; Home Button
  • Page 12 – Up and Down Arrow Buttons (; HOME; Home Screen; Accessing the Menus; Setup Menu; Using the Menus; • Left arrow button
  • Page 13 – PROGRAMMING OVERVIEW; Setpoint and Differential
  • Page 14 – Setup Procedure; not
  • Page 21 – all
  • Page 22 – or
  • Page 23 – each
  • Page 25 – WITH NO
  • Page 28 – WITH
  • Page 33 – Creating a Schedule
  • Page 35 – SCHEDULING EXAMPLE; DAY
  • Page 36 – (exit from selected time period
  • Page 37 – SUMMARY MENU; Error Message; EE; Diagnostic Messages; Blinking relay status; SPECIFICATIONS
  • Page 38 – DoC; Emissions Compliance
  • Page 40 – Automation and Control Solutions
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INSTALLATION INSTRUCTIONS

62-0255-07

E4436

T775U Series 2000 Electronic

Stand-Alone Controller

PRODUCT DESCRIPTION

The T775 electronic stand-alone controllers are the next
generation of universal controls capable of remote
sensing of temperature, humidity, pressure, etc. and
providing switched and proportional outputs to various
types of loads. A built-in time clock is standard.

The T775U controller allows a wide range of sensors to
be configured. Humidity, pressure, temperature, or any
0-5 Vdc, 0-10 Vdc, or 4-20 mA input is supported.

A Reset function is available where the Sensor B
temperature (e.g. outside temperature) is used to provide
reset control for Sensor A (e.g. humidity). For example,
as the outside temperature gets colder, the setpoint can
automatically be adjusted to prevent condensation.

IMPORTANT

The T775U 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 is required.

Table 1. T775U Controller Configurations.

Controller

Model

a

a

The T775U includes a digital input for use with the disable or setback option.

Description

Replaces

Output

Reset

SPDT
Relay

Outputs

Analog

(Mod)

Outputs

b

b

The modulating (analog) outputs may be 4-20 mA, 0-10 Vdc, 2-10 Vdc, or Series 90 selectable.

Sensor

Inputs

Nbr of

Sensors

Included Enclosure

T775U2006

Universal:
Humidity,
Pressure,
Temperature,
etc.

H775A1006
H775A1022
H775A1048
H775A1063
H775B1005

H775C1004

c

H775D1003

c

H775E1002

c

c

For the H775C1004, H775D1003, and H775E1002 model replacement, the T775U only partially replaces the function
of these devices. Check application for suitability.

Yes

2

2

2

d

d

For the sensor inputs, Sensor A can be 0-10Vdc, 4-20mA, or a standard temperature input. Sensor B is a standard
temperature sensor input only. Sensor B is used only for reset on the T775U2001.

None

NEMA 1

T775U2016

N/A

Yes

2

2

2

e

e

The T775U2016 can control Sensor A (universal) and Sensor B (temperature) independently, like other standard
T775 controllers.

None

NEMA 1

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Summary

Page 2 - Actuators; Product Selection Tool

T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 62-0255—07 2 Temperature Sensors a (Sensor A or B) The controller accepts 1,097 Ohms PTC at 77°F (25°C):• 50021579-001 – Standard sensor (included with all models except NEMA 4X models) • T775-SENS-WR – Water resistant with 5 foot leads (included w...

Page 3 - Controller Dimensions; BEFORE INSTALLATION; When Installing This Product; INSTALLATION AND SETUP; MOUNTING; Controller Mounting

T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3 62-0255—07 Controller Dimensions Fig. 1. T775U Dimensions in inches (mm). BEFORE INSTALLATION Review the “Specifications” on page 37 before installing the controller. When Installing This Product 1. Read these instructions carefully. Failure to f...

Page 4 - WIRING; Wiring Connections Access; CAUTION; Reset Temperature Control

T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 62-0255—07 4 Use a screwdriver to pry out only the knockouts that you will use. If mounting on DIN rail, be sure to remove the knockouts before mounting. See “Controller Wiring” on page 7 and Fig. 12 on page 9 for recommended knockout usage and loc...

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