Submittal Sheet

ManualsBrandsHoneywell ManualsHVAC SuppliesElectronic Temp Controller Special Sequencer Model w/ 2 Temp Inputs, 4 SPDT Relays, 1 Sensor

Table Of Contents

INSTALLATION INSTRUCTIONS

62-0257-05

E4436

T775L Series 2000 Electronic

Stand-Alone Staging Controller

PRODUCT DESCRIPTION

The T775 electronic stand-alone controllers are the next

generation of commercial and agricultural controls

capable of remote sensing of temperature and providing

switched and/or proportional outputs to various types of

loads. A built-in time clock is standard.

The T775L model can be used to stage multiple relays

from two independent heat or cool setpoints. The number

of stages for each setpoint can be freely chosen, limited

only by the number of relays available.

The T775L can be configured with up to two T775S

Expansion Modules for a maximum of up to 12 stages.

IMPORTANT

The T775L 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. T775L Controller Configuration.

Controller Model Description Output Reset

SPDT Relay

Outputs

Digital

Input

Sensor

Inputs

Number of

Sensors

Included

Stage

Control

Addable

T775S Enclosure

T775L2007

Stage Sequencer

with Reset

Yes

21YesYesNEMA 1

The T775L model can be used to stage multiple relays from two independent heat or cool setpoints. The number of stages for each setpoint can

be freely chosen, limited by the number of relays available (up to 12 stages using two T775S expansion modules).

In addition to the two staged loops, up to two additional relays can be available for independent on-off control.

The maximum number of non-sequenced relays is two (2) with each having its own setpoint and its own throttling range. These relays are

available if not being used by the staged relay loops.

The T775L includes a digital input for use with the disable or setback option.

Summary of content (36 pages)

PAGE 1
T775L Series 2000 Electronic Stand-Alone Staging Controller INSTALLATION INSTRUCTIONS PRODUCT DESCRIPTION The T775 electronic stand-alone controllers are the next generation of commercial and agricultural controls capable of remote sensing of temperature and providing switched and/or proportional outputs to various types of loads. A built-in time clock is standard. The T775L model can be used to stage multiple relays from two independent heat or cool setpoints.
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T775L SERIES 2000 CTLR PRODUCT DESCRIPTION Temperature Sensorsa Accessories 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-STRAP – Strap-on sensor with wiring box • 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 • C7031B2008 – 6 inch duct mount with wiring box • C7031D2003 – 5 in
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BEFORE INSTALLATION BEFORE INSTALLATION Review the “Specifications” on page 36 before installing the controller. When Installing This Product 1. 2. 3. 4. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. Check ratings given in instructions and on the product to ensure the product is suitable for your application. Installer must be a trained, experienced service technician.
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T775L SERIES 2000 CTLR WIRING Temperature Sensor Wiring For example, in a reset control based on outside temperature, Sensor A must be the inside sensor and Sensor B must be the outside sensor. CAUTION Multiple Parallel Sensors Electrical Shock Hazard. Can short equipment circuitry. Make sure that metal tube of sensor does not short against T terminals in wall-mounted case. Multiple sensors can be parallel-series wired to sense average temperatures in large spaces.
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WIRING T775L SERIES 2000 CTLR Controller Wiring See Fig. 7 on page 6 for locating the appropriate power input, remote sensors input, low voltage, contact closure, and load output terminals. WARNING Electrical Shock Hazard. Can cause severe injury, death or property damage. Disconnect power supply before beginning wiring, or making wiring connections, to prevent electrical shock or equipment damage. Access to the terminals can be gained through standard conduit knockouts (A through E in Fig.
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T775L SERIES 2000 CTLR WIRING APPLICATION EXAMPLES Controller Wiring Details The wiring connection terminals are shown in Fig. 7 and are described in Table 2 on page 6. See Fig. 8 – Fig. 12 beginning on page 7 for typical T775L wiring applications. Table 2. Description of Wiring Terminal Connections.
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WIRING APPLICATION EXAMPLES T775L SERIES 2000 CTLR SENSOR A SENSOR A T T T T L1 (HOT) 24 VAC L2 C + C + 120V COM NO COM NO C NC LOAD 2 120 COM 240 LOAD 1 NO C NC COM NO 1 NO COM NO C NC NO C NC NO LOAD 2 COM M24384A LOAD 1 Fig. 8. Wiring for Two-stage Control – 24 Vac Input and 24 Vac Load. 1 FOR 240 VAC LOAD, CONNECT TO 240 TERMINAL. M24386A Fig. 10. Wiring for Two-stage Control with 120 or 240 Vac (120 Vac Input and 120 Vac Load shown).
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T775L SERIES 2000 CTLR CHECKOUT See “1.1.1.2. CALIBRATE (the sensor)” on page 13 for the instructions to enter the calibration value. See Table 3 and Fig. 13 on page 8 for temperature resistance information. DIGITAL INPUT Table 3. Temperature Sensor Calibration for Resistance Loss due to Wire Length. – + M24391 Fig. 12. Wiring for Digital Input (dry contact). mΩ/ft 200 ft 500 ft 1,000 ft 14 2.5 0.46 1.14 2.28 16 4.0 0.72 1.82 3.64 18 6.4 1.16 2.90 5.82 20 10.2 1.86 4.64 9.
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INTERFACE OVERVIEW T775L SERIES 2000 CTLR INTERFACE OVERVIEW The T775L controller uses an LCD panel and 6-button keypad to provide status information and permit user input of the programming, setup, and scheduling parameters. The following figure describes the display areas of the LCD and the keypad. • Pressing and holding the MENU button for five seconds leaves the current screen and displays the Setup menu.
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T775L SERIES 2000 CTLR PROGRAMMING OVERVIEW Accessing the Menus Menus are used for setup, programming, scheduling, and viewing the summary settings. Program, Schedule, and Summary Menus To access these menus from the home screen, press the MENU button. See Fig. 16.
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1. SETUP T775L SERIES 2000 CTLR Setpoint High Limit You can set an irreversible setpoint high limit maximum value for any single displayed setpoint value. Adjust the setpoint (at any output) to the desired maximum setpoint. Then, simultaneously press the HOME, W, and X buttons and continue to press all three buttons for five seconds to set the setpoint high limit maximum to this value. NOTE: You must press all three buttons at exactly the same time for this action to occur. IMPORTANT 1.
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T775L SERIES 2000 CTLR 1. SETUP To change the controller’s sensors and output setup parameters, perform the following procedures in the order listed: 1. Enter Setup mode — see “Entering Setup Mode”. 2. Setup Sensors — see “1. Setting up the Sensors”. 3. Setup Outputs — see “1.3. Setting up the Outputs” on page 14. 4. Exit Setup Mode — see “1.4. Exiting Setup” on page 21. SETUP SENSORS Entering Setup Mode To enter Setup mode, press and hold the MENU button for five seconds to display the Setup menu.
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1. SETUP SETUP SENSORS SENSOR A UNITS T775L SERIES 2000 CTLR SETUP SENSORS SENSOR A UNITS 1.1.1.1. UNITS (°F or °C) IMPORTANT This is a global change and affects the unit values for all temperature parameters on all displays. This UNITS screen displays only for Sensor A. DEG F DEG C SELECT UNITS FOR SENSOR A M24431 Fig. 22. Setup - Sensors - Sensor A - Units. SETUP SENSORS SENSOR A CALIBRATE SETUP SENSORS SENSOR A CALIBRATE 0.0 1.1.1.2.
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T775L SERIES 2000 CTLR SETUP SENSORS 1. SETUP 1.2.1. SENSOR B SETUP SENSORS # SENSORS SENSOR A SENSOR B EXIT M24435 Continue with “1.3. Setting up the Outputs”. Fig. 26. Setup - Sensors - Sensor B Menu. APP TYPE: SEQUENCER SETUP OUTPUTS For two-sensor reset control, Sensor B must always be the controlling temperature. For example, in a reset control based on outside temperature, Sensor B must be the outside sensor. 1. From the Sensors menu, use the T button to highlight SENSOR B. 2.
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1. SETUP T775L SERIES 2000 CTLR 1.3.2. Number of LOOPS SETUP OUTPUTS # LOOPS SETUP OUTPUTS # LOOPS The value entered here determines the number of loops displayed on the home screen. 1. From the Outputs menu, highlight # LOOPS then press the X button to display the number of loops. 2. Use the S and T buttons to enter the number of loops (1 or 2). Default: 1 3. Press the X button to accept the value and display the Outputs menu. 2 ENTER NUMBER OF LOOPS M24438 Fig. 29.
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T775L SERIES 2000 CTLR SETUP OUTPUTS OPTIONS MIN OFF 1. SETUP SETUP OUTPUTS OPTIONS MIN OFF 0 1.3.3.2. MIN OFF (minimum off time for all relays) This is the minimum number of seconds of “off time” for all relays that are not configured in a loop. SEC ENTER MINIMUM OFF TIME FOR OUTPUTS M24441 Fig. 32. Setup - Outputs - Options - Min Off Time. SETUP OUTPUTS OPTIONS DI OPTS SETUP OUTPUTS OPTIONS DI OPTS The DI Option that you select applies to all outputs.
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1. SETUP T775L SERIES 2000 CTLR 1.3.3.5. Exit Options Setup SETUP OUTPUTS OPTIONS Press the W button (or highlight EXIT and press the X button) to exit and return to the Outputs menu. USE SCHED MIN OFF DI OPTS SHOW RT EXIT Continue with “1.3.4. Setting up the Loops” M24444 Fig. 35. Setup - Outputs - Options - Exit. SETUP OUTPUTS LOOP 1 1.3.4. Setting up the Loops SETUP OUTPUTS LOOP 1 1.
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T775L SERIES 2000 CTLR SETUP OUTPUTS LOOP 1 INTEGRAL 1. SETUP SETUP OUTPUTS LOOP 1 INTEGRAL 400 1.3.4.2. INTEGRAL SEC ENTER INTEGRAL TIME FOR LOOP 1 M24447 1. From the Loop 1 menu, use the Sand T buttons to highlight INTEGRAL. 2. Press the X button to display the integral value. 3. Use the S and T buttons to change the integral time from 0 to 3,600 seconds in increments of 10 seconds. Default: 400 seconds Range: 0 to 3,600 seconds 4.
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1. SETUP SETUP OUTPUTS LOOP 1 OFF DELAY T775L SERIES 2000 CTLR 1.3.4.5. OFF DELAY SETUP OUTPUTS LOOP 1 OFF DELAY 0 SEC ENTER TIME FOR INTERSTAGE OFF DELAY M24450 Fig. 41. Setup - Outputs - Loop 1 - Off Delay. SETUP OUTPUTS LOOP 1 SCHEDULE 1.3.4.6. SCHEDULE SETUP OUTPUTS LOOP 1 SCHEDULE The Schedule option displays only if the USE SCHED parameter is set to Yes (see Fig. 31 on page 15). 1. From the Loop 1 menu, use the Sand T buttons to highlight SCHEDULE. 2.
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T775L SERIES 2000 CTLR SETUP OUTPUTS LOOP 1 1. SETUP 1.3.4.8. Exit Loop Setup SETUP OUTPUTS LOOP 1 Use the S and T buttons to highlight EXIT and press the X button. # RELAYS INTEGRAL DERIVATIVE ON DELAY OFF DELAY SCHEDULE RESET EXIT If you have additional relay outputs, continue with “1.3.5. Setting up the Relays”. Otherwise, go to “1.4. Exiting Setup” on page 21 M24453 Fig. 44. Setup - Outputs - Loop 1 - Exit. SETUP OUTPUTS RELAY 9 1.3.5. Setting up the Relays SETUP OUTPUTS RELAY 9 1.
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1. SETUP T775L SERIES 2000 CTLR SETUP OUTPUTS RELAY 9 RESET 1.3.5.2. RESET (Relay Reset) SETUP OUTPUTS RELAY 9 RESET This selection enables or disables reset for the selected relay. YES NO IMPORTANT To use the Reset function of the controller, the first Loop must be set for Reset. USE RESET FOR RELAY 9 M24456 Fig. 47. Setup - Outputs - Relay - Reset. SETUP OUTPUTS RELAY 9 RESET RT 1. Press the X button to display the Reset values. 2. Use the S and T buttons to select YES or NO. Default: NO 3.
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T775L SERIES 2000 CTLR 2. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH NO RESET 2. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH NO RESET If you are employing Reset, go to “3. Programming Output (Loops and Additional Relays) with Reset” on page 24. The T775L can be programmed for Reset or No Reset. From the factory, the T775L is programmed for No Reset. This section describes the steps necessary to program the controller for No Reset. Continue with “2.1. Entering Program Mode”. 2.1.
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2. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH NO RESET PROGRAM LOOP 1 THROT RNG MENU PROGRAM LOOP 1 THROT RNG 20 ENTER THROTTLING RANGE FOR LOOP 1 T775L SERIES 2000 CTLR 2.2.2. THROTTLING RANGE or DIFFERENTIAL Throttling Range is used for Loops, and Differential displays for the Relay outputs. oF M24423 Fig. 54. Program - Throttling Range or Differential. 1. From the menu, use the S and T buttons to highlight THROT RNG or DIFFRNTL. 2.
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T775L SERIES 2000 CTLR PROGRAM LOOP 1 SETBACK 3. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH RESET 2.2.5. SETBACK MENU PROGRAM LOOP 1 SETBACK 60 ENTER SETBACK SETPOINT FOR LOOP 1 The Setback temperature option displays only if scheduling is enabled (see Fig. 31 on page 15) or the DI Option is set to Setback. (see Fig. 33 on page 16). This is the desired setpoint temperature that you want to use during setback mode for this output.
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3. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH RESET Determining and Setting the Reset Values NOTE: When using the Reset feature, Sensor A must be sensing the controlled temperature (e.g. Boiler), Sensor B must be sensing the resetting temperature (e.g. outdoor temp). To program an output (loop or relay) for Reset, refer to the values as shown in the examples below and in Fig. 59. Choose your own appropriate values for Sensor A maximum and minimum and Sensor B maximum and minimum.
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T775L SERIES 2000 CTLR 3. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH RESET 3.2. Entering Program Mode MENU PROGRAM MENU PROGRAM Press the MENU button, then select PROGRAM and press the X button to view the Program menu. LOOP 1 LOOP 2 RELAY 9 RELAY 10 EXIT M24401 Fig. 60. Program Menu.
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3. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH RESET PROGRAM LOOP 1 SP MIN A2 MENU PROGRAM LOOP 1 SP MIN A2 T775L SERIES 2000 CTLR 3.3.3. SP MIN A2 or BOILER MIN (Setpoint minimum for Sensor A) 140 oF ENTER MINIMUM SETPOINT FOR SENSOR A M24408 1. From the menu, use the S and T buttons to highlight SP MIN A2. 2. Press the X button to display the setpoint value. 3. Use the S and T buttons to increase/decrease the desired minimum setpoint temperature.
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T775L SERIES 2000 CTLR 3. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH RESET 3.3.7. SETBACK OFFSET (if configured) MENU PROGRAM LOOP 1 SETBACK PROGRAM LOOP 1 SETBACK The Setback temperature option displays only if Scheduling is enabled (see Fig. 31 on page 15) or the DI Option is set to Setback (see Fig. 33 on page 16). -10 This value is the number of degrees plus (+) or minus (-) that you want the temperature to be offset from the setpoint.
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3. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH RESET PROGRAM RELAY 9 T775L SERIES 2000 CTLR 3.5. Program Menus for the Additional Relays with Reset MENU PROGRAM RELAY 9 Press the MENU button, select PROGRAM, then select an available relay to view the parameters. Fig. 71 shows the example for relay 9. If Relays are not set for Reset in Setup mode, simply enter the setpoint desired.
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T775L SERIES 2000 CTLR PROGRAM RELAY 9 SENSOR 3. PROGRAMMING OUTPUT (LOOPS AND ADDITIONAL RELAYS) WITH RESET MENU PROGRAM RELAY 9 SENSOR 3.5.3. SENSOR 1. From the menu, use the S and T buttons to highlight SENSOR. 2. Press the X button to display the sensor selections. 3. Use the S and T buttons to select Sensor A or B. 4. Press the X button to accept the highlighted sensor and display the next option. SENSOR A SENSOR B SELECT SENSOR FOR RELAY 9 M24417 Fig. 74. Program - Sensor.
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4. SCHEDULING T775L SERIES 2000 CTLR 4. SCHEDULING NOTES: 1. 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. 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 15). 2.
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T775L SERIES 2000 CTLR MAIN SCHEDULE OPTIONS SET TIME 4. SCHEDULING MAIN SCHEDULE OPTIONS SET TIME 4.2.1. 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 M24462 Fig. 79. Schedule - Options - System Time. MAIN SCHEDULE OPTIONS SET DATE MAIN SCHEDULE OPTIONS SET DATE 4.2.2.
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4. SCHEDULING T775L SERIES 2000 CTLR MENU 4.3. Setting Individual Schedules MENU SCHEDULE MON-FRI SCHEDULE MON-FRI As shown in the Schedule menu (Fig. 77 on page 31), 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 M24465 Fig. 82. Schedule Event Menu (Showing MON-FRI). SCHEDULING EXAMPLE Setting the schedule is independent of the temperature settings for the relay outputs.
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T775L SERIES 2000 CTLR MAIN SCHEDULE MON-FRI E1 TIME 4. SCHEDULING MAIN SCHEDULE MON-FRI E1 TIME 4.3.2. E1 TIME (time for event 1) 6:00 AM SET TIME FOR EVENT 1 M24467 1. From the selected time period menu, use the S and T buttons to highlight E1 TIME. 2. Press the X button to display the current time setting for event 1. 3. Use the X button to cycle between the hour, minute, and AM/PM values. 4. Use the S and T buttons to increase/decrease the desired value for the hour, minute, and AM/PM. 5.
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SUMMARY MENU T775L SERIES 2000 CTLR SUMMARY MENU TROUBLESHOOTING The Summary menu provides the ability to view the schedule (E1 and E2 times) for each relay for each day of the week. Power Loss NOTE: Scheduling must be enabled for the Summary menu to display. Enabling scheduling is determined in the Setup process for the Output Options (see “1.3.3. OPTIONS” on page 15). The date and time settings are retained for 24 hours after a power outage.
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SPECIFICATIONS T775L SERIES 2000 CTLR SPECIFICATIONS DoC Power: 24, 120, or 240 Vac; 50/60 Hz; A separate earth ground is required for any power source. Emissions Compliance Power Consumption: • 8 VA maximum at 60 Hz • 10 VA maximum at 50 Hz Operating & Storage Temperature Ambient Rating: • -40° F to 125° F (-40° C to 52° C) @ 50 Hz • -40° F to 140° F (-40° C to 60° C) @ 60 Hz Relative Humidity: 5% to 95% non-condensing Relay Contact Output Ratings (N.O. and N.C.): • 1/2 hp; 9.8 AFL, 58.