T775U Series 2000 Electronic Stand-Alone Controller INSTALLATION INSTRUCTIONS 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.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Temperature Sensorsa (Sensor A or B) Universal Sensors (Sensor A only) 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 with NEMA 4X models) • T775-SENS-WT – Watertight with 6 foot lead • T775-SENS-OAT – Outdoor air temperature sensor • C7031D2003 – 5 inch immersion sensor with wiring box (use immersion well
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Dimensions TOP 1 (25.5) 7/8 (22.5) 2 15/16 (74) 4 13/32 (112.1) 1/2 (12.4) 3 31/32 (101) LEFT RIGHT 4 1/16 (103.4) 1/64 (3.8) 8 5/32 (207.1) 7 23/32 (196) 4 1/16 (103.4) 2 13/16 (71.8) 2 11/16 (68.1) FRONT VIEW 7/8 (22.5) 7/8 (22.5) 7/8 (22.5) 1 (25.5) BOTTOM M24546 Fig. 1. T775U Dimensions in inches (mm). BEFORE INSTALLATION 6.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Use a screwdriver to pry out only the knockouts that you will use. WIRING 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 locations. If you do not use an opened knockout be sure to cover it. All wiring must comply with applicable electrical codes and ordinances, or as specified on installation wiring diagrams.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Temperature Sensor Wire Type and Size SENSORS Temperature sensors use standard AWG 18/2 unshielded wire. For cable runs greater than 25 feet or where electrical interference may be a problem, shielded cable is recommended. See Fig. 4. Refer to “Temperature Sensor Calibration” on page 11 for wire size selection where cable runs are longer than 25 feet. TO T775 CONNECTIONS (SENSOR A) OR (SENSOR B). M24548 Fig. 3. Parallel-series wiring of sensors.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SHIELDED CABLE SHIELDED CABLE NOTES: C S V T T NOTES: C S V T T 1. SHIELDED CABLE MUST BE CONNECTED TO A SEPARATE EARTH GROUND. HOWEVER, DO NOT GROUND SHIELDED CABLE AT SENSOR END. SENSOR A 1 SENSOR B 1. SHIELDED CABLE MUST BE CONNECTED TO A SEPARATE EARTH GROUND. HOWEVER, DO NOT GROUND SHIELDED CABLE AT SENSOR END. SENSOR A SENSOR B 2. TO MINIMIZE NOISE PICKUP, MAKE SENSOR CONNECTION FROM SHIELDED CABLE AS CLOSE AS POSSIBLE TO SENSOR BODY.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Wiring See Fig. 11 on page 8 for locating the appropriate power input, remote sensors input, low voltage, contact closure, and load output terminals. WARNING Access to the terminals can be gained through standard conduit knockouts (A through E in Fig. 11 on page 8) located around the perimeter of the enclosure: • Knockouts A and B should be used only for sensor and low-voltage wiring.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Wiring Details The wiring connection terminals are shown in Fig. 11 and are described in Table 2. See Fig. 12 – Fig. 19 beginning on page 9 for typical T775U wiring applications. Fig. 11. T775U Terminal and Feature Locations.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER WIRING APPLICATION EXAMPLES 1 Fig. 12 – 19 illustrate typical controller wiring for various applications. C–T S+T V NOTE: The electronic Series 90 output provided with modulating T775 models can not drive electro-mechanical slidewire devices like older Series 3 modulating meters (prior to Series 6), V9055s, and S984s.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER HONEYWELL ELECTRONIC SERIES 90 MODUTROL MOTOR MINIMUM POSITION POTENTIOMETER (Q209) T1 T2 B R W W R SPDT CHANGEOVER (H205 OR H705) B 2 1 POWER – + DIGITAL INPUT M24559 MODULATING OUTPUT TERMINAL (MOD 1) Fig. 16. Wiring for Digital Input (dry contact). HONEYWELL MODUTROL MOTOR WITH VOLTAGE CONTROL INPUT T1 T2 B R– W+ B R– W+ 3 1 USE SEPARATE TRANSFORMER FOR T775 WHEN USING 24 VAC.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Humidity, Pressure, and Universal Sensor Calibration Table 4. Temperature Sensor Calibration for Resistance Loss due to Wire Length. (Continued) A calibration parameter is available using Setup mode. The calibration range is +/- 10% of the Min Value to Max Value range setup for the sensor. See examples in Table 3. Temperature Offset in °F (Feet)a AWG Rating m /ft 200 ft 500 ft 1,000 ft 22 16.1 2.92 7.32 14.64 Table 3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Up and Down Arrow Buttons (p and q) HOME RELAYS 1 2 ON Use these buttons to move your selection up and down through a menu or list. • When the desired item is highlighted, you press the u arrow button to display that item’s content. • When a value is displayed (e.g. 70°F), the up and down arrows increase and decrease the value.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Program, Schedule, and Summary Menus NOTES: 1. To access these menus from the home screen, press the MENU button. See Fig. 23. MENU DISPLAY WHEN SCHEDULING IS SET MENU DISPLAY WHEN SCHEDULING IS NOT SET MENU MENU HOME RELAYS 1 2 ON SENSORS SENSOR A 78 oF 84 oF PROGRAM SCHEDULE SUMMARY EXIT SENSOR B MOD1 MOD2 2. PROGRAMMING OVERVIEW The controller must be programmed before being placed into service.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1. SETUP IMPORTANT 1. This action sets the maximum setpoint value of all outputs to the setpoint high limit maximum. 2. Setting the high limit setpoint maximum is irreversible. If you perform the action inadvertently and this setpoint adversely affects the control of your system, you must replace the controller.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Setup Procedure To change the controller’s sensors and output setup parameters, perform the following procedures in the order listed: 1. Enter Setup mode — see “1.1. Entering Setup Mode” 2. Setup Sensors — see “1.2. Setting up the Sensors” 3. Setup Outputs — see “1.3. Setting up the Outputs” on page 18 4. Exit Setup Mode — see “1.4. Exiting Setup” on page 26 The Setup process uses a hierarchical menu structure that is easy to use.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SENSORS SENSOR A TYPE 1.2.2.1. TYPE (Sensor A only) SETUP SENSORS SENSOR A TYPE 1. From the Sensor A selections, use the p and q buttons to highlight TYPE. 2. Press the u button to display the type values. 3. Use the p and q buttons to highlight the desired value PT1000 (1097 PTC), 0-5V, 0-10V, or 420MA. Default: PT1000 NOTE: The default label PT1000 refers to a 1097 PTC temperature sensor. 4.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SENSORS SENSOR A MIN VAL OR MAX VAL SETUP SENSORS SENSOR A MIN VAL 0.0 ENTER MINIMUM VALUE FOR SENSOR A 1.2.2.2.3. MIN or MAX VALUE (Sensor A only; SETUP SENSORS SENSOR A MAX VAL 0.0 oF 0-5V, 0-10V or 4-20mA) The minimum and maximum values display only for Sensor A when its type is 0-5V, 0-10V or 4-20MA. 1. From the Sensor A selections, use the p and q buttons to highlight MIN VAL or MAX VAL. 2. Press the u button to display the units. 3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.2.2.5. Exit Sensor A Setup SETUP SENSORS SENSOR A Press the t button to exit Sensor A selections and return to the Sensors menu. or Use the p and q buttons to highlight EXIT and press the u button. UNITS CALIBRATE LABEL EXIT Continue with “1.2.3. SENSOR B (Temperature only)” M24596 Fig. 34. Setup - Sensors - Sensor A - Exit. SETUP SENSORS 1.2.3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS MOD 1 1.3.1. Setting up the Modulating Outputs SETUP OUTPUTS MOD 1 1. From the Output menu, use the p and q buttons to highlight the desired modulating output (MOD 1 or MOD 2). 2. Press the u button to display the selected MOD menu. TYPE MIN OUT % INTEGRAL DERIVATIV SCHEDULE RESET EXIT Use the remaining procedures, beginning with “1.3.1.1. TYPE (of output signal)”, to set up each modulating output.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER NOTES: (Integral Timing) 1. The Integral time is factory set for 400 seconds. This is a good middle range and should satisfy many applications. The integral time can be increased for applications where sensed response is slow, and can be decreased for applications where sensed response is fast (e.g. discharge air control). the offset from setpoint during steady state control that is often seen in proportional only control. 3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS MOD 1 RESET 1.3.1.6. RESET SETUP OUTPUTS MOD 1 RESET This selection enables the controller’s Reset function, and allows each output to be individually programmed for Reset or No Reset. YES-BOILER YES-OTHER NO USE RESET FOR MOD1 IMPORTANT To use the Reset function of the controller, the first modulating output (MOD1) must be set for Reset here.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS # RELAYS 1.3.2. NBR OF RELAYS SETUP OUTPUTS # RELAYS 1. From the Outputs menu, use the pand q buttons to highlight # RELAYS. 2. Press the u button to display the number of relays. 3. Use the p and q buttons to display the number from 1 to 2. 4. Press the u button to accept the value and display the Outputs menu. 2 ENTER NUMBER OF RELAYS The number of relay outputs entered here determines how many relays display on the home screen.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS OPTIONS MIN OFF SETUP OUTPUTS OPTIONS MIN OFF 1.3.3.2. MIN OFF or MIN ON SETUP OUTPUTS OPTIONS MIN ON This is the minimum number of seconds of “off time” or “on time” for all relays. OR MIN ON 0 SEC ENTER MINIMUM OFF TIME FOR RELAYS 0 1. Press the u button to display the Min Off/On value. 2. Use the p and q buttons to increase/decrease the desired number of seconds from 0 to 990 seconds in 10 second increments.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS OPTIONS DI OPTS 1.3.3.3. DI OPTIONS (digital input options) SETUP OUTPUTS OPTIONS DI OPTS The DI Option you select applies to all outputs. This option overrides any Setpoint/Setback values entered in the Schedule. DISABLE SETPOINT SETBACK ENABLE IGNORE SELECT DI OPTIONS FOR OUTPUTS 1. Press the u button to display the DI Option selections. 2. Use the p and q buttons to highlight DISABLE, SETBACK, or IGNORE. Default: DISABLE 3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS RELAY 1 1.3.4. Setting up the Relays SETUP OUTPUTS RELAY 1 1. From the Outputs menu, use the p and q buttons to highlight the desired relay (1 or 2). 2. Press the u button to display the selected Relay menu. SCHEDULE RESET RESET RT EXIT Continue with the remainder of this section to setup the relay outputs. M24614 Fig. 53. Setup - Outputs - Relay Menu. SETUP OUTPUTS RELAY 1 SCHEDULE 1.3.4.1.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS RELAY 1 RESET RT 1.3.4.3. RESET RT (run time) SETUP OUTPUTS RELAY 1 RESET RT This selection displays only if “Show RT = YES” is selected during Output Options setup (see page 24). YES NO RESET RUN TIME FOR RELAY 1 1. Press the u button to display the Reset RT values. 2. Use the p and q buttons to select YES or NO. Default: NO 3. Press the u button to accept the value and return to the Relay menu.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 2.1. Entering Program Mode MENU PROGRAM MENU PROGRAM Press the MENU button, then select PROGRAM and press the u button to view the Program menu. MOD 1 MOD 2 RELAY 1 RELAY 2 EXIT M24567 Fig. 58. Program Menu. PROGRAM MOD 1 2.1.1. Program Menu for Outputs with No Reset MENU PROGRAM MOD 1 From the Program menu, select MOD 1, MOD 2, RELAY 1, or RELAY 2 to view the parameters.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3. Default: 60°F (16°C) Range: -40°F to 248°F (-40°C to 120°C) Press the u button to accept the value and display the menu. PROGRAM MOD 1 SENSOR 2.1.3. SENSOR MENU PROGRAM MOD 1 SENSOR This sub-menu choice is only available on the T775U2016 model. SENSOR A SENSOR B 1. From the menu, use the p and q buttons to highlight SENSOR A or SENSOR B. 2. Press the u button to accept the sensor selection and display the next option.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Go to “2.1.2. SETPOINT” on page 27 to continue programming. 2.2. Program Next Output (Modulating When you finish programming the outputs, continue with “1.3. Exit Programming without Reset”. Output or Relay) For the next output, select the desired MOD or Relay from the Program menu (see Fig. 58 on page 27). 1.3. Exit Programming without Reset Press the HOME button to leave programming mode and return to the home screen.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER CAUTION If using the time clock or DI to go to setback, °F SP MAX A1 (BOILER MAX) the T775P will shift the reset curve up or down and cause the controlled setpoint to exceed either the entered reset max. temp or min. temp (dropping below reset minimum is most common, since setback is normally below setpoint). If this is not desired, either do not use setback, or adjust the min. and max.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3. Use the p and q buttons to increase/decrease the desired setpoint temperature. Default: 10°F (-12°C) Range: -40°F to 248°F (-40°C to 120°C) 4. Press the u button to accept the value and display the next option. 3.2.2. RESET B1 or OUTSD MIN (Sensor B value when at SP MAX A1 Setpoint) 1. 2. From the menu, use the p and q buttons to highlight RESET B1 or OUTSD MIN. Press the u button to display the setpoint value. PROGRAM MOD 1 SP MIN A2 3.2.3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM RELAY 1 ACTION 3.2.6. ACTION MENU PROGRAM RELAY 1 ACTION For the MOD 1 output (and for outputs with RESET=NO), the ACTION selection displays. HEAT COOL REV ACT DIR ACT HUMID DEHUMID For all other outputs with RESET=YES, the ACTION selection does not display; continue with “3.2.7. SETBACK OFFSET (if configured)” on page 32. SELECT ACTION FOR RELAY 1 1. From the menu, use the p and q buttons to highlight ACTION. Default: HEAT 2.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3.3. Second Modulating Output and Relays MENU PROGRAM MOD 2 OFFSET MENU PROGRAM MOD 2 PROGRAM MOD 2 For the second Modulating Output and the two Relays (if they are configured for Reset), the Offset parameter displays on the Program menu as shown in Fig. 75. OFFSET THROT RNG ACTION SETBACK EXIT -10 3.3.1.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 4. SCHEDULING Scheduling provides the ability to set daily temperature settings for up to two events per day. Typically, these are the daytime (setpoint) and the nighttime (setback) settings. 1. 2. IMPORTANT To enable Scheduling, you must first enter Setup mode (press and hold the MENU button for 5 seconds), select OUTPUTS, select OPTIONS, select USE SCHED, and then select YES. (see “1.3.3.1. USE SCHED” on page 22).
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN SCHEDULE OPTIONS SET TIME 4.2.1. SET TIME MAIN SCHEDULE OPTIONS SET TIME Setting the system time is required to enable the controller to follow daylight saving time. IMPORTANT Set the Date before setting the Time. See “4.2.2. SET DATE”. 08:12 AM SET SYSTEM TIME 1. From the Options menu, use the p and q buttons to highlight SET TIME. 2. Press the u button to display the current system time setting. 3.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU SCHEDULE MON-FRI 4.3. Setting Individual Schedules MENU SCHEDULE MON-FRI As shown in the Schedule menu (Fig. 77 on page 34), schedules can be set for the following time periods: • Monday through Friday • Saturday and Sunday • Individual days of the week E1 SETPT E1 TIME E2 SETPT E2 TIME EXIT 1. From the Schedule menu, use the p and q buttons to highlight the desired time period. 2.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN SCHEDULE MON-FRI E1 TIME 4.3.2. E1 TIME (time for event 1) MAIN SCHEDULE MON-FRI E1 TIME 1. From the selected time period menu, use the p and q buttons to highlight E1 TIME. 2. Press the u button to display the current time setting for event 1. 3. Use the u button to cycle between the hour, minute, and AM/PM values. 4. Use the p and q buttons to increase/decrease the desired value for the hour, minute, and AM/PM. 5.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SUMMARY MENU Error Message The Summary menu provides the ability to view the schedule (E1 and E2 times) for each relay for each day of the week. EE There is a two-character error code that displays in response to controller software problems: EEPROM Failure— The values read back from the EEPROM are not the same as written into the EEPROM. This error cannot be field repaired. Replace the device.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER DoC reasonable protection against harmful interference in residential installations. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. Emissions Compliance EN 55022: 2006 CISPR 22: 2006 VCCI V-3/2006.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 customer.honeywell.com ® U.S. Registered Trademark © 2012 Honeywell International Inc. 62-0255—09 M.S. Rev.