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Honeywell T755U BEFORE INSTALLATION, INSTALLATION AND SETUP, MOUNTING

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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER

362-0255—09

Controller Dimensions

Fig. 1. T775U Dimensions in inches (mm).

BEFORE INSTALLATION

Review the “Specifications” on page38 before

installing the controller.

When Installing This Product

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a hazard-

ous condition.

2. Check ratings given in instructions and on the prod-

uct to ensure the product is suitable for your appli-

cation.

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

INSTALLATION AND SETUP

The following installation procedures are typically

performed in the order listed:

1. Mounting — see “Mounting” below.

2. Wiring — see “Wiring” on this page.

3. Checkout — see page10.

4.

Interface and Programming overview – see page11.

5. Setup – see page14.

6.

Programming the Controller with no Reset – see page26

or

Programming the Controller with Reset – page29.

7. Scheduling (optional)— see page34.

Additional topics are:

• Sensor calibration begins on page11.

• Interface overview begins on page11.

• Summary menu begins on page38.

• Troubleshooting begins on page38.

MOUNTING

This section describes the mounting procedures for the

controller and temperature sensor(s).

Controller Mounting

IMPORTANT

Avoid mounting in areas where acid fumes or

other deteriorating vapors can attack the metal

parts of the controller circuit board, or in areas

where escaping gas or other explosive vapors

are present.

IMPORTANT

The controller must be mounted in a position that

allows clearance for wiring, servicing, and

removal.

M24546

4 13/32 (112.1) 1/2 (12.4)

3 31/32 (101)

7 23/32

(196)

8 5/32

(207.1)

2 15/16 (74)

7/8 (22.5)

1 (25.5)

4 1/16 (103.4)

4 1/16 (103.4)

1/64 (3.8)

2 11/16 (68.1)

7/8 (22.5)

2 13/16 (71.8)

7/8 (22.5)

1 (25.5)

7/8 (22.5)

TOP

BOTTOM

LEFT RIGHT

FRONT VIEW

Contents

Main INSTALLATION INSTRUCTIONS 62-0255-09 T775U Series 2000 Electronic Stand-Alone Controller PRODUCT DESCRIPTION Temperature Sensorsa (Sensor A or B) Differential Pressure Sensors Humidity Sensors CO2 Sensors Universal Sensors BEFORE INSTALLATION When Installing This Product INSTALLATION AND SETUP MOUNTING Controller Mounting WIRING Wiring Connections Access Temperature Sensor Wiring Reset Temperature Control Multiple Parallel Temperature Sensors Humidity, Pressure, and Universal Sensor Wiring T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER C S VS + Controller Wiring WARNING Controller Wiring Method W Controller Wiring Details T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER WIRING APPLICATION EXAMPLES LOAD 2 COM Fig. 15. Wiring for Two-stage Control with 240 Vac. Fig. 12. Wiring for Two-stage Control 24 Vac Input and 24 Vac Load. WARNING Power Loss Humidity, Pressure, and Universal Sensor Calibration Temperature Sensor Calibration INTERFACE OVERVIEW Using the LCD Panel Interface Home Button Menu Button Left and Right Arrow Buttons (t and u) Up and Down Arrow Buttons (p and q) PROGRAMMING OVERVIEW Setpoint and Differential Setpoint High Limit Programming the T775U Controller 1. SETUP Setup Procedure 1.1. Entering Setup Mode 1.2. Setting up the Sensors 1.2.1. Number of SENSORS 1.2.2. SENSOR A 1.2.2.1. TYPE 1.2.2.2.1. UNITS [1097 PTC)] 1.2.2.2.2. UNITS 4-20mA) 1.2.2.2.3. MIN or MAX VALUE 0.0 0.0 1.2.2.3. CALIBRATE 0.0 1.2.2.5. Exit Sensor A Setup 1.2.3. SENSOR B (Temperature only) 1.3. Setting up the Outputs 1.3.1. Setting up the Modulating Outputs 1.3.1.1. TYPE (of output signal) 1.3.1.2. MIN OUT % 1.3.1.3. INTEGRAL 1.3.1.4. DERIVATIVE 1.3.1.5. SCHEDULE 1.3.1.6. RESET 1.3.1.7. Hide 1.3.1.7. Exit Modulating Outputs Setup 1.3.2. NBR OF RELAYS 1.3.3. OPTIONS 1.3.3.1. USE SCHED 1.3.3.2. MIN OFF or MIN ON 1.3.3.3. DI OPTIONS (digital input options) 1.3.3.4. SHOW RT (show run time hours) 1.3.3.5. Exit Options Setup 1.3.4. Setting up the Relays 1.3.4.1. SCHEDULE 1.3.4.2. RESET 1.3.4.3. RESET RT (run time) 1.3.4.4. EXIT Relay Setup 2. PROGRAMMING OUTPUTS (MOD AND RELAY) WITH NO RESET 2.1. Entering Program Mode 2.1.1. Program Menu for Outputs with No Reset 2.1.2. SETPOINT 2.1.3. SETBACK 2.1.3. SENSOR 2.1.5. THROTTLING RANGE or DIFFERENTIAL 2.1.6. ACTION 2.2. Program Next Output Output or Relay) 3. PROGRAMMING OUTPUTS (MOD AND RELAY) WITH RESET 3.1. Setting Up the Controller for Reset Determining and Setting the Reset Value s Reset Example: Setback (optional) Example: 3.2. Program Menus for Outputs with Reset 20 3.2.1. SP MAX A1 or BOILER MAX 3.2.2. RESET B1 or OUTSD MIN 160 3.2.3. SP MIN A2 or BOILER MIN 20 3.2.4. RESET B2 or OUTSD MAX 3.2.6. ACTION -10 3.2.7. SETBACK OFFSET 3.3. Second Modulating Output and Relays -10 3.3.1. SETPOINT OFFSET (MOD 2 only) 3.3.2. Second Modulating Output and Relays Programming 3.4. Exit Programming with Reset 4. SCHEDULING Creating a Schedule 4.1. Entering Schedule Mode 4.2. OPTIONS 4.2.1. SET TIME 4.2.2. SET DATE 4.2.3. DAYLIGHT (daylight saving time) 4.3. Setting Individual Schedules 4.3.1. E1 SETPT (setpoint for event 1) 4.3.2. E1 TIME (time for event 1) 4.3.3. E2 SETPOINT (setpoint for event 2) 4.3.4. E2 TIME (time for event 2) 4.3.5. EXIT (exit from selected time period settings) 4.4. Exiting Scheduling Mode SUMMARY MENU TROUBLESHOOTING Power Loss Errors and Diagnostics Error Message DoC Emissions Compliance Immunity Compliance Safety Compliance FCC Compliance Statement: Automation and Control Solutions