Honeywell T775P 2000 Series Installation Instructions Manual
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Honeywell T775P 2000 Series Installation Instructions Manual

Electronic stand-alone controller
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T775P Series 2000 Electronic
Stand-Alone Controller
Controller Model Description
Boiler
a
T775P2003
Model
with Reset
a
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).
b
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.
c
The T775P includes a digital input for use with the disable or setback option.
Table 1. T775P Controller Configuration.
Output
SPDT Relay
Digital
Reset
Outputs
Output
Yes
b
4
E4436
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. 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.
Number of
Digital
Sensor
Input
Inputs
1
3
c
1
Sensors
Stage
Addable
Included
Control
T775S
3
Yes
Yes
Enclosure
NEMA 1
62-0256-11

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  • 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.

  • Page 2: Product Changes

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Temperature Sensors Accessories The controller accepts 1,097 Ohms PTC at 77°F (25°C): • 107324A – Bulb Holder, duct insertion • 50021579-001 – Standard sensor (included with all • 107408 – Heat Conductive Compound, 4 ounce models except NEMA 4X models) •...

  • Page 3: Before Installation

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER BEFORE INSTALLATION Mount the controller on any convenient interior location using the four mounting holes provided on the back of the enclosure using #6 or #8 screws (screws are not provided Review the “Specifications” on page 36 before and must be obtained separately).

  • Page 4: Temperature Sensor Wiring

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 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.

  • Page 5: Controller Wiring

    T775P SERIES 2000 ELECTRONIC STAND-ALONE 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 Access to the terminals can be gained through standard conduit knockouts (A through E in Fig.

  • Page 6: Controller Wiring Details

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Wiring Details Table 2. Description of Wiring Terminal Connections. The wiring connection terminals are shown in Fig. 7 and Termina are described in Table 2. Connection Description See Fig. 8 – Fig. 12 beginning on page 7 for typical Sensors T775P wiring applications.
  • Page 7 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SENSOR B SENSOR A SENSOR B SENSOR A SENSOR C SENSOR C (HOT) 24 VAC 120V LOAD 1 LOAD 2 LOAD 2 LOAD 1 M24376 1 FOR 240 VAC LOAD, CONNECT TO 240 TERMINAL. M24389A Fig.

  • Page 8: Power Loss

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 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.

  • Page 9: Interface Overview

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER INTERFACE OVERVIEW Using the LCD Panel Interface The T775P controller uses an LCD panel and 6-button keypad to provide status information and permit user input The 6-button keypad is used to move through the menus of the programming, setup, and scheduling parameters.

  • Page 10: Setup Menu

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU DISPLAY WHEN MENU DISPLAY WHEN HOME HOME HOME SCHEDULING IS SET SCHEDULING IS NOT SET 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 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...

  • Page 11: Programming Overview

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAMMING OVERVIEW Stages (Relays) and Pump Output The T775P model can be used to stage multiple relays The controller must be programmed before being placed from a singe heat or cool setpoint. The number of stages into service.

  • Page 12: Setup Procedure

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER outside temperature), and is used only to reset the When programming is complete, you may continue with controlled setpoint. In Non-reset applications, Sensor B “4. Scheduling” on page 31. can be used to monitor some third temperature. Programming the T775P Controller To program the controller, perform the setup configuration...

  • Page 13: Number Of Sensors

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.2.1. Number of SENSORS SETUP SETUP SENSORS SENSORS The value entered here determines the number of # SENSORS # SENSORS sensors displayed on the home screen. NOTES: Three (3) sensors – if three sensors are selected, Sensor A (supply) or Sensor C (return) can be the controlled temperature.
  • Page 14 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP 1.2.2.2. CALIBRATE SETUP (the sensor) SENSORS SENSORS SENSOR A SENSOR A Ensure that the wire size calibration value is within the CALIBRATE CALIBRATE limits. See “Temperature Sensor Calibration” on page 8. 1. From the Sensor selections, use the  and  but- tons to highlight CALIBRATE.
  • Page 15 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.2.4. SENSOR C SETUP SETUP Normally, Sensor C is used to sense the Return SENSORS SENSORS temperature and is used to activate the Differential alarm # SENSORS (the difference between Sensors A and C) and/or can be SENSOR A the controlled temperature sensor.
  • Page 16 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.3.2. SCHEDULE SETUP SETUP OUTPUTS OUTPUTS 1. From the Outputs menu, use the and  buttons SCHEDULE SCHEDULE to highlight SCHEDULE. 2. Press the  button to display the value. 3. Use the  and  buttons to select YES or NO. Default: NO 4.
  • Page 17 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.3.3.2. INTEGRAL SETUP SETUP OUTPUTS OUTPUTS 1. From the Options menu, use the and  buttons OPTIONS OPTIONS INTEGRAL INTEGRAL to highlight INTEGRAL. 2. Press the  button to display the integral value. 3. Use the  and  buttons to increase/decrease the integral time from 0 to 3,600 seconds in increments of 10 seconds.

  • Page 18: Off Delay

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP 1.3.3.5. OFF DELAY SETUP OUTPUTS OUTPUTS OPTIONS OPTIONS This is the minimum time delay between consecutive OFF OFF DELAY OFF DELAY stages. 1. From the Options menu, use the and  buttons to highlight OFF DELAY, then press the  button to display the interstage off delay.
  • Page 19 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP 1.3.3.8. LEAD LAG SETUP OUTPUTS OUTPUTS OPTIONS OPTIONS 1. From the Options menu, use the and  buttons LEAD LAG LEAD LAG to highlight LEAD LAG. STANDARD 2. Press the  button to display the values FOFO STANDARD, FOFO (First On / First Off), and EQ RUN...
  • Page 20 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP 1.3.3.10. SHOW RT SETUP (show run time hours) OUTPUTS OUTPUTS OPTIONS OPTIONS 1. Press the  button to display the Show RT values. SHOW RT SHOW RT 2. Use the  and  buttons to select YES or NO. Default: YES 3.
  • Page 21 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP 1.3.4.1.1. RESET RT SETUP (run time) OUTPUTS OUTPUTS STAGE 1 STAGE 1 This selection displays only if “Show RT = YES” is RESET RT SHOW RT selected during Output Options setup (see Fig. 41). 1.
  • Page 22 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.3.7. Pump Output Options SETUP SETUP OUTPUTS OUTPUTS The Pump Output options display on the Stage/Pump STG4/PUMP STG4/PUMP menu once you enable the pump output. PUMP OUT EXERCISE RESET RT displays only if “SHOW RT = YES” is selected CONTNUOUS during Output Options setup (see Fig.

  • Page 23: Setup Alarms

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.3.7.4. POSTPURGE SETUP SETUP OUTPUTS OUTPUTS 1. From the Stage/Pump menu, use the  and  STG4/PUMP STG4/PUMP POSTPURGE POSTPURGE buttons to select POSTPURGE. 2. Press the  button to display the postpurge time. 3.

  • Page 24: High Limit

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.4.1.1. HIGH LIMIT SETUP SETUP ALARMS ALARMS 1. From the Alarms menu, use the and  buttons to HI LIMIT HI LIMIT highlight HI LIMIT. 2. Press the  button to display the high alarm limit temperature.

  • Page 25: Exiting Setup

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 1.4.3. DIF ALARM SETUP SETUP ALARMS ALARMS The Differential Alarm activates when the difference DIF ALARM DIF ALARM between Sensors A and C drops below the DIF LIMIT. 1. From the Alarms menu, use the  and  buttons to select DIF ALARM.
  • Page 26 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 2. PROGRAMMING OUTPUT To use the Reset feature, the Reset Option must be set to Reset=YES in Setup mode (see “2.1. Setting Up the STAGE(S) WITH RESET Controller for Reset”). The T775P can be programmed for Reset or No Reset. From the factory, the T775P is programmed for No Reset.
  • Page 27 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER RESET = YES-OTHER RESET = YES-BOILER 2.2. Program Menus for Reset DI OPTION = SETBACK DI OPTION = SETBACK Press the MENU button, then select PROGRAM and press the  button to view the Program menu. MENU MENU PROGRAM...
  • Page 28 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 2.2.4. RESET B2 or OUTSD MAX MENU PROGRAM PROGRAM Sensor B value when Sensor A is at minimum. RESET B2 RESET B2 1. From the menu, use the  and  buttons to high- light RESET B2 or OUTSD MAX.

  • Page 29: Entering Program Mode

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 2.2.8. SETBACK OFFSET (if configured) MENU PROGRAM PROGRAM The Setback temperature option displays only if SETBACK SETBACK 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.
  • Page 30 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3.1.1. SETPOINT MENU PROGRAM PROGRAM 1. From the menu, use the  and  buttons to high- SETPOINT SETPOINT light SETPOINT. 2. Press the  button to display the setpoint value. 3. Use the  and  buttons to increase/decrease the desired setpoint temperature.

  • Page 31: Creating A Schedule

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3.1.5. SETBACK SETPOINT (if configured) MENU PROGRAM PROGRAM The Setback temperature option displays only if SETBACK SETBACK 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.
  • Page 32 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 4.1. Entering Schedule Mode Press the MENU button, then select SCHEDULE and MENU MENU press the  button to view the Schedule menu. SCHEDULE SCHEDULE OPTIONS MON-FRI SAT-SUN MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY SUNDAY EXIT M24311...
  • Page 33 T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN 4.2.3. DAYLIGHT MAIN (daylight saving time) SCHEDULE SCHEDULE OPTIONS OPTIONS 1. From the Options menu, use the  and  buttons DAYLIGHT DAYLIGHT to highlight DAYLIGHT. 2. Press the  button to display the current system setting for daylight saving time.

  • Page 34: Exiting Scheduling Mode

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN 4.3.1. E1 SETPT MENU (setpoint for event 1) SCHEDULE SCHEDULE MON-FRI MON-FRI 1. From the selected time period menu, use the  and E1 SETPT E1 SETPT  buttons to highlight E1 SETPT. SETPOINT 2.

  • Page 35: Troubleshooting

    T775P SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SUMMARY MENU TROUBLESHOOTING The Summary menu provides the ability to view the Power Loss schedule (E1 and E2 times) for each day of the week. The date and time settings are retained for 24 hours after NOTE: Scheduling must be enabled for the a power outage.

  • Page 36: Specifications

    By using this Honeywell literature, you agree that Honeywell will have no liability for any damages arising out of your use or modification to, the literature. You will defend and indemnify Honeywell, its affiliates and subsidiaries, from and against any liability, cost, or damages, including attorneys’...

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