Install Instructions

ManualsBrandsHoneywell ManualsHVAC SuppliesElectronic Temp Controller Boiler Special w/ 3 Temp Inputs, 4 SPDT Relays, 1 Pump Output, 3 Sensors

Table Of Contents

INSTALLATION INSTRUCTIONS

62-0256-03

E4436

T775P Series 2000 Electronic

Stand-Alone 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 T775P can be configured with or without Reset

control from a single heat or cool setpoint.

Three sensors are configurable. In normal installations,

Sensor A is the supply controlled temperature, Sensor B

is the outdoor controlling (reset) temperature, and

Sensor C is the return controlled temperature, which can

be used for the Differential alarm and/or as the controlled

setpoint sensor.

The T775P can be configured with up to two T775S

Expansion Modules for a maximum of up to 12 stages

with the last stage being an option for a pump stage.

IMPORTANT

The T775P 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. T775P Controller Configuration.

Controller Model Description

Output

Reset

SPDT Relay

Outputs

Digital

Output

Digital

Input

Sensor

Inputs

Number of

Sensors

Included

Stage

Control

Addable

T775S Enclosure

T775P2003

Boiler Model

with Reset

Yes

33YesYesNEMA 1

The T775P model can be used to stage multiple relays from a single heat or cool setpoint. The number of stages can be freely chosen, limited

by the number of relays available (up to 12 stages [11 if using the pump output] using two T775S expansion modules).

The T775P provides a pump output using the last of the four SPDT relay outputs on the T775P controller. When T775S Expansion Modules are

used, the configurable pump output is the last relay output of the last expansion module. The pump output will be either stage 4, 8, or 12,

depending on whether T775S Expansion module(s) are used.

The T775P includes a digital input for use with the disable or setback option.

Summary of content (36 pages)

PAGE 1
T775P Series 2000 Electronic Stand-Alone 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 T775P can be configured with or without Reset control from a single heat or cool setpoint. Three sensors are configurable.
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T775P SERIES 2000 CONTROLLER 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-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; P/N 50001774-001) • C7031J2009 – 12 fo
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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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T775P SERIES 2000 CONTROLLER WIRING Temperature Sensor Wiring For example, in a reset control based on outside temperature, Sensor A or C must be the inside sensor (supply, boiler, chiller, or return) 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.
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WIRING T775P SERIES 2000 CONTROLLER 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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T775P SERIES 2000 CONTROLLER WIRING Controller Wiring Details The wiring connection terminals are shown in Fig. 7 and are described in Table 2. Table 2. Description of Wiring Terminal Connections. Connection Terminal See Fig. 8 – Fig. 12 beginning on page 7 for typical T775P wiring applications.
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WIRING APPLICATION EXAMPLES T775P SERIES 2000 CONTROLLER WIRING APPLICATION EXAMPLES Fig. 8 — 12 illustrate typical controller wiring for various applications. SENSOR A SENSOR B SENSOR C SENSOR B SENSOR C SENSOR A T T T T T T T T T T T T L1 (HOT) 24 VAC L2 C + C + 1 120V COM 120 COM 240 LOAD 1 NO COM NO C NC LOAD 2 NO COM NO C NC NO C NC NO C NC NO LOAD 2 COM COM NO LOAD 1 M24376 Fig. 8. Wiring for Two-stage Control – 24 Vac Input and 24 Vac Load.
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T775P SERIES 2000 CONTROLLER CHECKOUT IMPORTANT If the calibration value in the table exceeds the controller’s calibration limits of +/-10°F (+/-6°C), you must use a heavier gauge wire. For example, with a wire run of 1,000 feet you must use 20 AWG wire or heavier to calibrate for wire loss within the limits of the controller. DIGITAL INPUT DIGITAL OUTPUT ALARM NO C NC See “1.2.2.2. CALIBRATE (the sensor)” on page 14 for the instructions to enter the calibration value. – + NO C NC Table 3.
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INTERFACE OVERVIEW T775P SERIES 2000 CONTROLLER INTERFACE OVERVIEW The T775P 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. HOME 1 2 3 4 5 6 7 8 9 10 11 12 180.5 oF 72.5 oF 100.5 oF OUTDOOR B RETURN C ALARM MENU AREA home Home Button Menu Button 1. Pressing the MENU button always displays the Program menu.
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T775P SERIES 2000 CONTROLLER HOME 1 2 3 4 5 6 7 8 9 10 11 12 SENSORS SUPPLY A HOME 1 2 3 4 5 6 7 8 9 10 11 12 STG1 180.5 oF SETPOINT 72.5 oF SUPPLY A 100.5 oF OUTDOOR B RETURN C DI ON ON INTERFACE OVERVIEW STG2 66.0 oF 180.5 oF MENU DISPLAY WHEN SCHEDULING IS SET HOME 1 2 3 4 5 6 7 8 9 10 11 12 HOME 1 2 3 4 5 6 7 8 9 10 11 12 ON SETPOINT T 66.0 oF 72.5 oF OUTDOOR B 180.5 RT 832 HRS 72.5 oF 100.
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PROGRAMMING OVERVIEW PROGRAMMING OVERVIEW The controller must be programmed before being placed into service. IMPORTANT During programming, the controller is live at all times. For example, the contacts may open and close when adjusting the setpoint. The programming process uses a hierarchical menu structure that is easy to use. You press the W and X arrow buttons to move forward and backward through the menus. NOTES: 1. 2. 3. 4. The T775P controller interface is intuitive.
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T775P SERIES 2000 CONTROLLER 1. SETUP Programming the T775P Controller To program the controller, perform the setup configuration (see “1. Setup”) and then select one of the following procedures depending on whether the Reset function is to be used: • Program the Outputs for Reset — see “2. Programming Output Stage(s) with Reset”. • Program the Outputs for No Reset — see “3. Programming Output Stage(s) with No Reset” on page 29. When programming is complete, you may continue with “4.
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1. SETUP T775P SERIES 2000 CONTROLLER SETUP SENSORS # SENSORS 1.2.1. Number of SENSORS SETUP SENSORS # SENSORS The value entered here determines the number of sensors displayed on the home screen. NOTES: 1. 3 ENTER NUMBER OF SENSORS M24647 Fig. 20. Setup - Sensors - Number of Sensors. SETUP SENSORS SENSOR A Three (3) sensors – if three sensors are selected, Sensor A (supply) or Sensor C (return) can be the controlled temperature. Sensor B must always be the controlling temperature (e.g.
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T775P SERIES 2000 CONTROLLER SETUP SENSORS SENSOR A CALIBRATE 1. SETUP SETUP SENSORS SENSOR A CALIBRATE 0.0 1.2.2.2. CALIBRATE (the sensor) oF ENTER VALUE TO CALIBRATE SENSOR A M24650 Fig. 23. Setup - Sensors - Sensor A - Calibrate. SETUP SENSORS SENSOR A LABEL SETUP SENSORS SENSOR A LABEL 1.2.2.3. LABEL (the sensor input) SENSOR A BOILER A SUPPLY A CHILLER A SELECT LABEL FOR SENSOR A Ensure that the wire size calibration value is within the limits.
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1. SETUP T775P SERIES 2000 CONTROLLER SETUP SENSORS 1.2.4. SENSOR C SETUP SENSORS Normally, Sensor C is used to sense the Return temperature and is used to activate the Differential alarm (the difference between Sensors A and C) and/or can be the controlled temperature sensor. # SENSORS SENSOR A SENSOR B SENSOR C EXIT If you are implementing two-sensor reset control, Sensor A (supply) or Sensor C (return) must always be the controlled temperature. M24654 Fig. 27. Setup - Sensors - Sensor C Menu. 1.
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T775P SERIES 2000 CONTROLLER SETUP OUTPUTS SCHEDULE 1. SETUP 1.3.2. SCHEDULE SETUP OUTPUTS SCHEDULE 1. From the Outputs menu, use the Sand T buttons to highlight SCHEDULE. 2. Press the X button to display the value. 3. Use the S and T buttons to select YES or NO. Default: NO 4. Press the X button to accept the value and display the Outputs menu. YES NO USE SCHEDULE FOR BOILER STAGES M24657 Fig. 30. Setup - Outputs - Schedule.
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1. SETUP SETUP OUTPUTS OPTIONS INTEGRAL T775P SERIES 2000 CONTROLLER 1.3.3.2. INTEGRAL SETUP OUTPUTS OPTIONS INTEGRAL 400 1. From the Options 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 increase/decrease the integral time from 0 to 3,600 seconds in increments of 10 seconds. Default: 400 seconds Range: 0 to 3,600 seconds 4. Press the X button to accept the value and display the Options menu.
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T775P SERIES 2000 CONTROLLER 1. SETUP SETUP OUTPUTS OPTIONS OFF DELAY SETUP OUTPUTS OPTIONS OFF DELAY 0 1.3.3.5. OFF DELAY SEC ENTER TIME FOR INTERSTAGE OFF DELAY M24663 Fig. 36. Setup - Outputs - Options - Off Delay. SETUP OUTPUTS OPTIONS WWSD SETUP OUTPUTS OPTIONS WWSD 1.3.3.6. WWSD This option selects the warm weather shutdown for stages. YES NO USE WARM WTHR SHTDN FOR STAGES 1. From the Options menu, use the Sand T buttons to highlight WWSD, then press the X button to display the value.
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1. SETUP SETUP OUTPUTS OPTIONS LEAD LAG T775P SERIES 2000 CONTROLLER SETUP OUTPUTS OPTIONS LEAD LAG 1.3.3.8. LEAD LAG 1. From the Options menu, use the Sand T buttons to highlight LEAD LAG. 2. Press the X button to display the values STANDARD, FOFO (First On / First Off), and EQ RUN (equal runtime). 3. Use the S and T buttons to select the value. Default: STANDARD 4. Press the X button to accept the value and display the Options menu. STANDARD FOFO EQ RUN SELECT LEAD LAG FOR STAGES M24666 Fig. 39.
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T775P SERIES 2000 CONTROLLER SETUP OUTPUTS OPTIONS SHOW RT 1. SETUP SETUP OUTPUTS OPTIONS SHOW RT 1.3.3.10. SHOW RT (show run time hours) 1. Press the X button to display the Show RT values. 2. Use the S and T buttons to select YES or NO. Default: YES 3. Press the X button to accept the value and return to the Options menu. YES NO SHOW RUN TIME FOR BOILER STAGES Selecting YES shows the RT (run time) hours for the first four stages on the home screen displays. Stages 5-12 are not displayed.
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1. SETUP T775P SERIES 2000 CONTROLLER SETUP OUTPUTS STAGE 1 RESET RT SETUP OUTPUTS STAGE 1 SHOW RT 1.3.4.1.1. RESET RT (run time) This selection displays only if “Show RT = YES” is selected during Output Options setup (see Fig. 41). YES NO 1. Press the X button to display the Reset RT values. 2. Use the S and T buttons to select YES or NO. Default: NO 3. Press the X button to accept the value and return to the Stage menu. RESET RUN TIME FOR STAGE 1 M24672 Fig. 45.
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T775P SERIES 2000 CONTROLLER SETUP OUTPUTS STG4/PUMP 1. SETUP 1.3.7. Pump Output Options SETUP OUTPUTS STG4/PUMP The Pump Output options display on the Stage/Pump menu once you enable the pump output. RESET RT PUMP OUT EXERCISE PREPURGE POSTPURGE EXIT Reset RT displays only if “Show RT = YES” is selected during Output Options setup (see Fig. 41). M24676 Fig. 49. Setup Pump Output Options. SETUP OUTPUTS STG4/PUMP EXERCISE SETUP OUTPUTS STG4/PUMP EXERCISE 1.3.7.1. EXERCISE 1.
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1. SETUP T775P SERIES 2000 CONTROLLER 1.3.7.4. Pump Exit SETUP OUTPUTS STG4/PUMP Press the W button (or highlight EXIT and press the X button) to exit the current Stage/Pump menu and return to the Outputs menu. RESET RT PUMP OUT EXERCISE PREPURGE POSTPURGE EXIT This completes the pump setup. Continue with “1.4. Setup Alarms”. M24680 Fig. 53. Setup Pump Exit. 1.4. Setup Alarms SETUP ALARMS SETUP ALARMS 1. From the Setup menu, use the S and T buttons to highlight the Alarms. 2.
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T775P SERIES 2000 CONTROLLER SETUP ALARMS LO ALARM 1. SETUP 1.4.2. LOW ALARM SETUP ALARMS LO ALARM Only Sensor A can be used to sense the low alarm temperature. Sensor C cannot be used. YES NO ENABLE LOW LIMIT ALARM 1. From the Alarms menu, use the S and T buttons to select LO ALARM. 2. Press the X button to display the alarm options. 3. Use the S and T buttons to select YES or NO. Default: NO 4. Press the X button to accept the value and display the Alarms menu. M24684 Fig. 57. Setup Low Alarm.
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1. SETUP T775P SERIES 2000 CONTROLLER SETUP ALARMS DIF ALARM 1.4.3. DIF ALARM SETUP ALARMS DIF ALARM The Differential Alarm activates when the difference between Sensors A and C drops below the DIF LIMIT. 1. From the Alarms menu, use the S and T buttons to select DIF ALARM. 2. Press the X button to display the alarm options. 3. Use the S and T buttons to select YES or NO. Default: NO 4. Press the X button to accept the value and display the Alarms menu.
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T775P SERIES 2000 CONTROLLER 2. PROGRAMMING OUTPUT STAGE(S) WITH RESET 2. PROGRAMMING OUTPUT STAGE(S) WITH RESET To use the Reset feature, the Reset Option must be set to Reset=YES in Setup mode (see “2.1. Setting Up the Controller for Reset”). The T775P can be programmed for Reset or No Reset. From the factory, the T775P is programmed for No Reset. This section describes the steps necessary to program the controller for Reset. SETUP OUTPUTS OPTIONS RESET SETUP OUTPUTS OPTIONS RESET 2.1.
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2. PROGRAMMING OUTPUT STAGE(S) WITH RESET RESET = YES-OTHER AND DI OPTION = SETBACK RESET = YES-BOILER AND DI OPTION = SETBACK MENU PROGRAM MENU PROGRAM SP MAX RESET B1 SP MIN RESET B2 THROT RNG SENSOR HEAT/COOL SETBACK EXIT OR T775P SERIES 2000 CONTROLLER 2.2. Program Menus for Reset Press the MENU button, then select PROGRAM and press the X button to view the Program menu. Fig. 64 shows the menus for Reset-Other and ResetBoiler. Your menu is the one chosen in “2.1.
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T775P SERIES 2000 CONTROLLER PROGRAM RESET B2 2. PROGRAMMING OUTPUT STAGE(S) WITH RESET 2.2.4. RESET B2 or OUTSD MAX MENU PROGRAM RESET B2 60 Sensor B value when Sensor A is at minimum. oF ENTER MAXIMUM VALUE FOR OUTSIDE B M24637 1. From the menu, use the S and T buttons to highlight RESET B2 or OUTSD MAX. 2. Press the X button to display the setpoint value. 3. Use the S and T buttons to increase/decrease the desired setpoint temperature.
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3. PROGRAMMING OUTPUT STAGE(S) WITH NO RESET 2.2.8. SETBACK OFFSET (if configured) MENU PROGRAM SETBACK PROGRAM SETBACK -10 ENTER SETBACK OFFSET FOR STAGES T775P SERIES 2000 CONTROLLER The Setback temperature option displays only if scheduling is enabled (see Fig. 30 on page 16) or the DI Option is set to Setback. (see Fig. 40 on page 19). This value is the number of degrees plus (+) or minus (-) that you want the temperature to be offset from the setpoint. oF M24641 Fig. 72.
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T775P SERIES 2000 CONTROLLER PROGRAM SETPOINT 3. PROGRAMMING OUTPUT STAGE(S) WITH NO RESET 3.1.1. SETPOINT MENU PROGRAM SETPOINT 0 1. From the menu, use the S and T buttons to highlight SETPOINT. 2. Press the X button to display the setpoint value. 3. Use the S and T buttons to increase/decrease the desired setpoint temperature. Default: 0°F (-18°C) Range: -40°F to 248°F (-40°C to 120°C) 4. Press the X button to accept the setpoint temperature and display the next option.
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4. SCHEDULING PROGRAM SETBACK T775P SERIES 2000 CONTROLLER 3.1.5. SETBACK SETPOINT (if configured) MENU PROGRAM SETBACK 170 ENTER SETBACK SETPOINT FOR STAGES The Setback temperature option displays only if scheduling is enabled (see Fig. 30 on page 16) or the DI Option is set to Setback (see Fig. 40 on page 19). This is the desired setpoint temperature that you want to use during setback mode.
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T775P SERIES 2000 CONTROLLER 4. SCHEDULING 4.1. Entering Schedule Mode MENU SCHEDULE Press the MENU button, then select SCHEDULE and press the X button to view the Schedule menu. MENU SCHEDULE OPTIONS MON-FRI SAT-SUN MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY SUNDAY EXIT M24311 Fig. 79. Schedule - Menu. MENU SCHEDULE OPTIONS 4.2. OPTIONS MENU SCHEDULE OPTIONS 1. From the Schedule menu, use the S and T buttons to highlight OPTIONS. 2. Press the X button to display the Options menu.
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4. SCHEDULING MAIN SCHEDULE OPTIONS DAYLIGHT T775P SERIES 2000 CONTROLLER MAIN SCHEDULE OPTIONS DAYLIGHT 4.2.3. DAYLIGHT (daylight saving time) 1. From the Options menu, use the S and T buttons to highlight DAYLIGHT. 2. Press the X button to display the current system setting for daylight saving time. 3. Use the S and T buttons to select YES or NO. Default: YES 4. Press the X button to accept the value and return to the Options menu. 5.
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T775P SERIES 2000 CONTROLLER MAIN SCHEDULE MON-FRI E1 SETPT 4. SCHEDULING MENU SCHEDULE MON-FRI E1 SETPT 4.3.1. E1 SETPT (setpoint for event 1) 1. From the selected time period menu, use the S and T buttons to highlight E1 SETPT. 2. Press the X button to display the setpoint options. 3. Use the S and T buttons to highlight the desired option. 4. Press the X button to accept the value and return to the selected time period menu. SETPOINT SETBACK NOT USED SELECT SETPOINT FOR EVENT 1 M24371 Fig. 85.
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SUMMARY MENU T775P SERIES 2000 CONTROLLER SUMMARY MENU TROUBLESHOOTING The Summary menu provides the ability to view the schedule (E1 and E2 times) 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 page 16). The date and time settings are retained for 24 hours after a power outage.
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SPECIFICATIONS T775P SERIES 2000 CONTROLLER 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 Digital Output (DO) Alarm: • Alternating Current (AC): — 30 Vac RMS; 1.