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Honeywell T775U Series 2000 Installation Instructions Manual
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Honeywell T775U Series 2000 Installation Instructions Manual

Electronic stand-alone controller
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T775U Series 2000 Electronic
Stand-Alone Controller
Controller
a
Model
Description
T775U2006
Universal:
Humidity,
Pressure,
Temperature,
etc.
T775U2016
a
The T775U includes a digital input for use with the disable or setback option.
b
The modulating (analog) outputs may be 4-20 mA, 0-10 Vdc, 2-10 Vdc, or Series 90 selectable.
c
For the H775C1004, H775D1003, and H775E1002 model replacement, the T775U only partially replaces the function
of these devices. Check application for suitability.
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.
e
The T775U2016 can control Sensor A (universal) and Sensor B (temperature) independently, like other standard
T775 controllers.

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
Table 1. T775U Controller Configurations.
SPDT
Output
Relay
Replaces
Reset
Outputs
H775A1006
Yes
2
H775A1022
H775A1048
H775A1063
H775B1005
c
H775C1004
c
H775D1003
c
H775E1002
N/A
Yes
2
E4436

INSTALLATION INSTRUCTIONS

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.
Analog
Nbr of
(Mod)
Sensor
Sensors
b
Outputs
Inputs
Included Enclosure
2
d
None
2
2
None
e
2
NEMA 1
NEMA 1
62-0255-07

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  • Page 1: Installation Instructions

    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.
  • Page 2 • C7046D1008 – 8 inch duct probe with mounting flange For more information on compatible actuators or other • C7100D1001 – 12 inch fast response, duct averaging Honeywell products, such as dampers and valves, go to sensor with flange www.customer.honeywell.com. From the home page select Product Selection Tool under Products.

  • Page 3: Before Installation

    T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Dimensions 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 4 1/16 (103.4) (196) 2 13/16 (71.8) 2 11/16 (68.1)
  • Page 4 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER WIRING Use a screwdriver to pry out only the knockouts that you will use. If mounting on DIN rail, be sure to remove the knockouts All wiring must comply with applicable electrical codes before mounting. See “Controller Wiring” on page 7 and and ordinances, or as specified on installation wiring Fig.
  • Page 5 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.
  • Page 6 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SHIELDED CABLE SHIELDED CABLE NOTES: NOTES: 1. SHIELDED CABLE MUST BE 1. SHIELDED CABLE MUST BE SENSOR A SENSOR A CONNECTED TO A SEPARATE CONNECTED TO A SEPARATE EARTH GROUND. HOWEVER, EARTH GROUND. HOWEVER,...
  • Page 7 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.
  • Page 8 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. 18 beginning on page 9 for typical T775U wiring applications. Fig. 11. T775U Terminal and Feature Locations.
  • Page 9 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER WIRING APPLICATION EXAMPLES – Fig. 12 – 18 illustrate typical controller wiring for various applications. 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.
  • Page 10 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER If any wiring changes are required, first be sure to remove power from the controller before starting work. Pay HONEYWELL ELECTRONIC SERIES 90 MODUTROL MOTOR particular attention to verifying the power connection (24, 120, or 240 Vac).
  • Page 11 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Table 4. Temperature Sensor Calibration for HOME Resistance Loss due to Wire Length. RELAYS 1 2 MENU AREA Temperature Offset in °F (Feet) SENSORS SENSOR A Rating m /ft 200 ft 500 ft 1,000 ft 0.46...

  • Page 12: Home Screen

    T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Up and Down Arrow Buttons ( Program, Schedule, and Summary Menus Use these buttons to move your selection up and down through a menu or list. To access these menus from the home screen, press the •...

  • Page 13: Setpoint High Limit

    T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER NOTES: IMPORTANT If you press the HOME button or there is no 1. This action sets the maximum setpoint value of keypad activity for four minutes, you exit all outputs to the setpoint high limit maximum.
  • Page 14 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 The Setup process uses a hierarchical menu structure listed: that is easy to use. You press the arrow buttons 1.
  • Page 15 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.2.2.1. TYPE SETUP SETUP (Sensor A only) SENSORS SENSORS 1. From the Sensor A selections, use the SENSOR A SENSOR A TYPE TYPE buttons to highlight TYPE. PT 1000 2. Press the button to display the type values.
  • Page 16 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SETUP SETUP 1.2.2.2.3. MIN or MAX VALUE (Sensor A only; SENSORS SENSORS SENSORS SENSOR A SENSOR A SENSOR A 0-5V, 0-10V or 4-20mA) MIN VAL MIN VAL MAX VAL The minimum and maximum values display only for MAX VAL Sensor A when its type is 0-5V, 0-10V or 4-20MA.
  • Page 17 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.2.2.5. Exit Sensor A Setup SETUP SENSORS Press the button to exit Sensor A selections and return SENSOR A to the Sensors menu. UNITS CALIBRATE Use the buttons to highlight EXIT and press the...
  • Page 18 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.3.1. Setting up the Modulating Outputs SETUP SETUP OUTPUTS OUTPUTS MOD 1 1. From the Output menu, use the buttons to MOD 1 highlight the desired modulating output (MOD 1 or TYPE MIN OUT % MOD 2).
  • Page 19 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER NOTES: (Integral Timing) 1. The Integral time is factory set for 400 seconds. This the offset from setpoint during steady state control is a good middle range and should satisfy many that is often seen in proportional only control.
  • Page 20 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SETUP 1.3.1.6. RESET OUTPUTS OUTPUTS MOD 1 MOD 1 This selection enables the controller’s Reset function, and RESET RESET allows each output to be individually programmed for YES-BOILER Reset or No Reset. YES-OTHER...
  • Page 21 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.3.2. NBR OF RELAYS SETUP SETUP OUTPUTS OUTPUTS # RELAYS # RELAYS 1. From the Outputs menu, use the buttons to highlight # RELAYS. 2. Press the button to display the number of relays.
  • Page 22 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SETUP SETUP 1.3.3.2. MIN OFF MIN ON OUTPUTS OUTPUTS OUTPUTS OPTIONS OPTIONS OPTIONS This is the minimum number of seconds of “off time” or MIN OFF MIN ON MIN OFF “on time” for all relays.
  • Page 23 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SETUP 1.3.3.4. SHOW RT (show run time hours) OUTPUTS OUTPUTS OPTIONS OPTIONS SHOW RT 1. Press the button to display the Show RT values. SHOW RT 2. Use the buttons to select YES or NO.
  • Page 24 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SETUP 1.3.4.2. RESET OUTPUTS OUTPUTS RELAY 1 RELAY 1 RESET RESET IMPORTANT For relays to use the Reset function of the con- troller, both modulating outputs (MOD 1 and MOD 2) must be set for Reset.
  • Page 25 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 2. PROGRAMMING OUTPUTS NOTE: For applications where Reset is not used, only one sensor (Sensor A) is available for use. (MOD AND RELAY) WITH NO RESET The T775U can be programmed for Reset or No Reset.
  • Page 26 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU 2.1.3. SETBACK PROGRAM PROGRAM MOD 1 MOD 1 The Setback temperature option displays only if SETBACK SETBACK scheduling is enabled (see Fig. 47 on page 21) or the DI Option is set to Setback. (see Fig. 49 on page 22).
  • Page 27 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU 2.1.6. ACTION PROGRAM PROGRAM MOD 1 MOD 1 1. From the menu, use the buttons to high- ACTION ACTION light ACTION. HEAT COOL Default: HEAT REV ACT 2. Press the button to display the action selections.
  • Page 28 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3. PROGRAMMING OUTPUTS NOTE: Even if the MOD outputs are not used, both MOD 1 and MOD 2 must be set to Reset in order (MOD AND RELAY) WITH to configure Reset for the relay(s).
  • Page 29 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER NOTE: For MOD 2 and the Relays, a setpoint offset is used. See “3.3.1. SETPOINT OFFSET (MOD 2 °F only)” on page 32. SP MAX A1 The remainder of this section beginning with “3.2.
  • Page 30 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU 3.2.3. SP MIN A2 or BOILER MIN PROGRAM PROGRAM MOD 1 MOD 1 (Setpoint minimum for Sensor A) SP MIN A2 SP MIN A2 1. From the menu, use the buttons to high- light BOILER MIN or SP MIN A2.
  • Page 31 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU 3.2.6. ACTION PROGRAM PROGRAM RELAY 1 RELAY 1 For the MOD 1 output (and for outputs with RESET=NO), ACTION ACTION the ACTION selection displays. HEAT COOL For all other outputs with RESET=YES, the ACTION REV ACT selection does not display;...
  • Page 32 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU 3.3. Second Modulating Output and MENU PROGRAM PROGRAM PROGRAM MOD 2 Relays MOD 2 MOD 2 OFFSET For the second Modulating Output and the two Relays (if OFFSET they are configured for Reset), the Offset parameter...
  • Page 33 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 4. SCHEDULING Scheduling provides the ability to set daily temperature If you press the HOME button or there is no settings for up to two events per day. Typically, these are keypad activity for four minutes, you exit...

  • Page 34: Main Main

    T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN MAIN 4.2.1. SET TIME SCHEDULE SCHEDULE OPTIONS OPTIONS Setting the system time is required to enable the SET TIME SET TIME controller to follow daylight saving time. IMPORTANT Set the Date before setting the Time. See “4.2.2.

  • Page 35: Mon-Fri Mon-Fri

    T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 4.3. Setting Individual Schedules MENU MENU SCHEDULE SCHEDULE As shown in the Schedule menu (Fig. 76 on page 33), MON-FRI MON-FRI schedules can be set for the following time periods: E1 SETPT • Monday through Friday E1 TIME •...

  • Page 36: Table Of Contents

    T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN MAIN 4.3.2. E1 TIME (time for event 1) SCHEDULE SCHEDULE MON-FRI MON-FRI E1 TIME 1. From the selected time period menu, use the E1 TIME buttons to highlight E1 TIME. 2. Press the button to display the current time set- ting for event 1.

  • Page 37: Error Message

    T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SUMMARY MENU Error Message There is a two-character error code that displays in response to controller software problems: The Summary menu provides the ability to view the schedule (E1 and E2 times) for each relay for each day of the week.
  • Page 38 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER reasonable protection against harmful interference in residential installations. This equipment generates, uses, and can radiate radio frequency energy, and if not Emissions Compliance installed and used in accordance with the instructions, may cause harmful interference to radio communications.
  • Page 39 T775U SERIES 2000 CONTROLLER 62-0255–07...
  • Page 40 T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive ® U.S. Registered Trademark Toronto, Ontario M1V 4Z9 © 2009 Honeywell International Inc.

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