Install Instructions

ManualsBrandsHoneywell ManualsHVAC SuppliesElectronic Temp Controller w/ 2 Temp Inputs, 4 SPDT Relays, 2 Sensors

Table Of Contents

INSTALLATION INSTRUCTIONS

62-0249—05

T775R 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.

A Reset function is available for all T775R models where

the Sensor B temperature (e.g. outside temperature) is

used to provide reset control for the Sensor A

temperature (e.g. boiler). For example, as the outside

temperature gets colder, the setpoint temperature

automatically adjusts to save energy.

Three T775R models have analog (modulating) outputs

for actuator and motor control.

IMPORTANT

The T775R 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. T775R Controller Configurations.

All models include a digital input for use with the disable or setback option.

The modulating (analog) outputs are 4-20 mA, 0-10 Vdc, 2-10 Vdc, or Series 90 selectable.

Each floating output eliminates two SPDT relay outputs.

The T775R2043 can support a high/low modulating limit at Sensor B for temperature control at Sensor A.

Controller

Model

Description Replaces

SPDT Relay

Outputs

Analog

(Mod)

Outputs

Floating

Outputs

Sensor

Inputs

Nbr of

Sensors

Included Enclosure

T775R2001 Reset Option N/A 4 None 2 2 2 NEMA 1

T775R2019 Reset Option N/A 4 2 None 2 2 NEMA 1

T775R2027 Reset Option T775J1043

T775J1050

T775J1068

2 2 None 2 2 NEMA 1

T775R2035 Reset Option T775J1001

T775J1076

2None122NEMA 1

T775R2043 Reset Option T775J1019

T775J1027

T775J1035

None 2 None

2NEMA 1

Summary of content (36 pages)

PAGE 1
T775R 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. A Reset function is available for all T775R models where the Sensor B temperature (e.g.
PAGE 2
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Temperature Sensorsa Accessories The controller accepts 1,097 Ohms PTC at 77° F (25° C): • 50021579-001 – Standard sensor (2 standard sensors are included with each T775R model) • T775-SENS-WR – Water resistant with 5 foot leads • 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 foot duct averaging se
PAGE 3
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 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.
PAGE 4
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 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.
PAGE 5
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Wiring Refer to 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.
PAGE 6
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Controller Wiring Details The wiring connection terminals are shown in Fig. 7 and are described in Table 2. See Figures 8 through 18 beginning on page 6 for typical T775R wiring applications. KNOCKOUT A Table 2. Description of Wiring Terminal Connections.
PAGE 7
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SENSOR A SENSOR B SENSOR A SENSOR B T T T T T T T T L1 (HOT) 24 VAC L2 LOAD 4 NO COM LOAD 2 COM NO COM NO LOAD 3 NO C NC + 120V COM NO C NC NO C NC 1 NC C NO NC C NO COM NO NC C NO NC C NO COM NO LOAD 1 C + 120 COM 240 C NO C NC LOAD 2 LOAD 1 LOAD 4 1 FOR 240 VAC LOAD, CONNECT TO 240 TERMINAL. M24286A Fig. 9. Wiring for Four-Stage Control – 24 Vac Input and 24 Vac Load. M24288A Fig. 11.
PAGE 8
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER HONEYWELL ELECTRONIC SERIES 90 MODUTROL MOTOR ML7984 ACTUATOR T1 T2 C B R W T1 T2 POWER OUTPUT 1 MODULATING OUTPUT TERMINAL (MOD 1) 1 POWER OUTPUT B R– W+ B R– W+ 2 MODULATING OUTPUT TERMINAL (MOD 1) USE SEPARATE TRANSFORMER FOR T775R WHEN USING 24 VAC. 1 B RW B R W – + B R W – + 3 M24290A Fig. 14. Wiring for ML7984 Valve Actuator (Using 4-20 mA Signal).
PAGE 9
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER CHECKOUT Table 3. Temperature Sensor Calibration for Resistance Loss due to Wire Length (Feet). Inspect all wiring connections at the controller terminals, and verify compliance with the installation wiring diagrams. 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.
PAGE 10
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER INTERFACE OVERVIEW The T775R controller uses an LCD panel and 6-button keypad to provide status information and permit user input of the programming, setup, and scheduling parameters. • Pressing and holding the MENU button for five seconds leaves the current screen and displays the Setup menu. The following figure describes the display areas of the LCD and the keypad.
PAGE 11
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER IMPORTANT After four minutes of inactivity (no buttons pressed), the LCD display reverts to the home screen display. Accessing the Menus Menus are used for programming, scheduling, viewing the summary settings, and setup of advanced options.
PAGE 12
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 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. This action sets the maximum setpoint value of all outputs to the setpoint high limit maximum. 2.
PAGE 13
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER The remainder of this section, beginning with “1.2. Entering Program Mode”, describes the individual parameters for configuring outputs with Reset. For your reference, the following Reset programming procedure uses the values in Fig. 25.
PAGE 14
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM RELAY 1 SP MAX A1 MENU PROGRAM RELAY 1 SP MAX A1 1.2.2. SP MAX A1 or BOILER MAX Setpoint maximum for Sensor A. 210 oF ENTER MAXIMUM SETPOINT FOR SENSOR A M24307 Fig. 28. Program - Sensor A Max. Setpoint. PROGRAM RELAY 1 RESET B1 MENU PROGRAM RELAY 1 RESET B1 20 1. From the menu, use the S and T buttons to highlight BOILER MAX or SP MAX A1. 2. Press the X button to display the maximum setpoint value. 3.
PAGE 15
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM RELAY 1 DIFFRNTL MENU PROGRAM RELAY 1 DIFFRNTL 20 1.2.6. DIFFERENTIAL or THROTTLING RANGE oF ENTER DIFERENTIAL FOR RELAY 1 M24312 Fig. 32. Program - Differential or Throttling Range. NOTES: a. In heating mode, the Differential is below the setpoint. The relay de-energizes when the temperature rises to the setpoint. As the temperature drops to the setpoint minus the Differential, the relay energizes. b.
PAGE 16
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MENU PROGRAM RELAY 2 OFFSET MENU PROGRAM RELAY 2 PROGRAM RELAY 2 OFFSET DIFFRNTL HEAT/COOL SETBACK EXIT -10 1.2.9. Subsequent Outputs For the subsequent outputs (MOD 2, Relay 2, Relay 3, etc. (if they are configured for Reset), the Offset parameter displays on the Program menu as shown in Fig. 35. 1.2.9.1 SETPOINT OFFSET (subsequent outputs only) oF ENTER SETPOINT OFFSET FOR RELAY 2 M24321 Fig. 35.
PAGE 17
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM RELAY 1 2.1.1. Program Menu for Outputs with No Reset MENU PROGRAM RELAY 1 Press the MENU button, select PROGRAM, then highlight the MOD or Relay desired and press the X button to view the parameters. Fig. 38 shows RELAY 1. SETPOINT DIFFRNTL SENSOR HEAT/COOL SETBACK EXIT NOTE: For MOD 1 and 2, THROT RNG replaces DIFFRNTL. M24315 Fig. 38. Program Menu - No Reset. PROGRAM RELAY 1 SETPOINT Continue with “2.1.2. SETPOINT”.
PAGE 18
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER PROGRAM RELAY 1 SENSOR MENU PROGRAM RELAY 1 SENSOR 2.1.4. 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 1 M24318 Fig. 41. Program - Sensor.
PAGE 19
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER Setup Procedure 3. Setup (Advanced Options) Setup provides the ability to change the factory default settings for the temperature sensors and outputs, to enable/disable reset control, and to enable/disable scheduling. NOTE: The T775R controller interface is intuitive. You may find that you do not need the following setup instructions for the sensors and outputs.
PAGE 20
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SENSORS SENSOR A 3.2.2. SENSOR A SETUP SENSORS SENSOR A If you are implementing two-sensor reset control, Sensor A must always be the controlled temperature and Sensor B must always be the controlling temperature. 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. UNITS CALIBRATE LABEL EXIT 1. From the Sensors menu, highlight SENSOR A. 2.
PAGE 21
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 3.2.2.4. Exit Sensor A Setup Press the W button to exit Sensor A selections and return to the Sensors menu. or Use the S and T buttons to highlight EXIT and press the X button. SETUP SENSORS 3.2.3. SENSOR B SETUP SENSORS # SENSORS SENSOR A SENSOR B EXIT 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.
PAGE 22
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP SENSORS SENSOR B 3.2.3.3.1. HI LIMIT or LOW LIMIT (Sensor B only) SETUP SENSORS SENSOR B CALIBRATE LABEL LIMIT HI LIMIT THROT RNG EXIT Fig. 52 shows the Hi Limit (Heat mode), but the process is the same for setting the Low Limit (Cool mode). For proper operation, the high limit should be used only in the Heat mode, and the low limit only in the Cool mode.
PAGE 23
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS MOD 1 3.3.3.1. Setting up the Modulating Outputs SETUP OUTPUTS MOD 1 1. From the Output menu, use the S and T buttons to highlight the desired modulating output (MOD 1 or MOD 2). 2. Press the X button to display the selected MOD menu. TYPE MIN OUT % INTEGRAL DERIVATIV SCHEDULE RESET EXIT NOTE: Modulating outputs are not available on controller models T775R2001 and T775R2035. If you are setting up one of these controllers, skip to “3.3.
PAGE 24
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS MOD 1 INTEGRAL SETUP OUTPUTS MOD 1 INTEGRAL 3.3.3.1.3. INTEGRAL 1. From the Mod menu, use the S and T buttons to highlight INTEGRAL. 2. Press the X button to display the Integral seconds. 3. Use the S and T buttons to increase/decrease the value from 0 to 3,600 in 10 second increments. Default: 400 seconds Range: 0 to 3,600 seconds 4. Press the X button to accept the seconds and return to the Mod menu.
PAGE 25
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS RELAY 1 MOD 1 SETUP OUTPUTS MOD 1 RESET 3.3.3.1.6. 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 output (MOD1 or Relay 1 depending on the model) must be set for Reset here. M24340 Fig. 61. Setup - Outputs - Mod Out - Reset.
PAGE 26
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS OPTIONS 3.3.5. OPTIONS SETUP OUTPUTS OPTIONS 1. From the Outputs menu, use the Sand T buttons to highlight OPTIONS. 2. Press the X button to display the Options menu. USE SCHED MIN OFF DI OPTS SHOW RT EXIT M24343 Fig. 63. Setup - Outputs - Options Menu. SETUP OUTPUTS OPTIONS USE SCHED SETUP OUTPUTS OPTIONS USE SCHED 3.3.5.1. USE SCHED 1. Press the X button to display the schedule selections. 2.
PAGE 27
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS OPTIONS DI OPTS SETUP OUTPUTS OPTIONS DI OPTS 3.3.5.3. DI OPTIONS (digital input options) The DI Option you select applies to all outputs. This option overrides any Setpoint/Setback values entered in the Schedule. DISABLE SETBACK IGNORE SELECT DI OPTIONS FOR OUTPUTS M24346 Fig. 66. Setup - Outputs - Options - DI Options.
PAGE 28
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS RELAY 1 TYPE SETUP OUTPUTS RELAY 1 TYPE 3.3.6.1. TYPE (standard or floating) The Floating option is only available on the T775R2001 and the T775R2035 models. STANDARD FLOATING SELECT TYPE FOR RELAY 1 M24350 • If you select FLOATING, the relays are paired (1-2 or 3-4) and are setup together. Continue with “3.3.6.1.1. Floating Relay Menu”. • If you select STANDARD, go to “3.3.6.2. SCHEDULE”. Fig. 69. Setup - Outputs - Relay - Type.
PAGE 29
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER SETUP OUTPUTS FLOAT 1 INTEGRAL SETUP OUTPUTS FLOAT 1 INTEGRAL 3.3.6.1.1.2. INTEGRAL (modulating/floating relay only) The Integral option displays only on the T775R2001 and the T775R2035 models when the Type option = Floating. 400 SEC ENTER INTEGRAL TIME FOR FLOAT 1 M24353 Fig. 72. Setup - Outputs - Floating Relay - Integral.
PAGE 30
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER CONTROLLERS WITH MODULATING OUTPUTS SETUP OUTPUTS RELAY 1 RESET 3.3.6.3. RESET SETUP OUTPUTS RELAY 1 RESET The Reset menu displayed (Fig. 75) depends on whether the controller has modulating outputs: • For controllers with modulating outputs, the first output (MOD 1) is settable for Reset, which then enables Reset to be set for the Relay outputs. Refer to “3.3.3.1.6. RESET” on page 25.
PAGE 31
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 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. (Refer to “3.3.5.1. USE SCHED” on page 26).
PAGE 32
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN SCHEDULE OPTIONS SET TIME 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 M24361 Fig. 79. Schedule - Options - System Time. MAIN SCHEDULE OPTIONS SET DATE MAIN SCHEDULE OPTIONS SET DATE 4.2.2.
PAGE 33
T775R 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 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 1. From the Schedule menu, use the S and T buttons to highlight the desired time period. 2.
PAGE 34
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER MAIN SCHEDULE MON-FRI E1 TIME MAIN SCHEDULE MON-FRI E1 TIME 4.3.2. E1 TIME (time for event 1) 6:00 AM SET TIME FOR EVENT 1 M24366 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.
PAGE 35
T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER 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 the schedule is determined in the Setup process for the Output Options (Refer to page 26). The date and time settings are retained for 24 hours after a power outage.
PAGE 36
T775R SERIES 2000 ELECTRONIC STAND-ALONE 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° to 125° F (-40° to 52° C) @ 50 Hz • -40° to 140° F (-40° 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.