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Honeywell T775J manual

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Table of contents for the manual

  • Page 1

    PRODUCT DA T A Copyright © 1995 Honeywell Inc. • All Rights Reserved T775J Electronic Remote T emperature Controller FEA TURES • T775 model pro vides reset control with tw o temperature inputs and one of either 4 to 20 mA, 0 to 18 Vdc, or Electr onic Series 90 a Proportional + Integral modulating output with 0 or 1 relay output sta ges, or 1 o[...]

  • Page 2

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 2 SPECIFICA TIONS IMPORT ANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, an individual unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions and some [...]

  • Page 3

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 3 Mounting: Mounts on any suitable horizontal or vertical surface. (See Fig. 5 for mounting hole locations.) Dimensions: See Fig. 1. Display Resolution: Sensed temperature and other operating parameters are displayed via a liquid crystal display (LCD) with a resolution of 1 ° F or 1 ° C.[...]

  • Page 4

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 4 Mounting Sensor in T7047C1090 Case 쐃 Run wires from T775J through wall. 쐇 Mount case to wall with screws provided. 쐋 Connect wires from the T775J to two T terminals on the T7047C Case.  Cut and strip 193987GA Sensor leads to 3 to 4 inch (76 to 102 mm) length and connect to T ter[...]

  • Page 5

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 5 Fig. 5. Feature locations. IMPORT ANT Erratic temperature readings from the 193987GA Sensor can be caused by poor wiring practices that must be avoided to assure proper operation: a. Do not route temperature sensor wiring with building power wiring. b. Do not locate temperature sensor wi[...]

  • Page 6

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 6 SELECT SET ENTER NO COM NC OUTPUT 1 OUTPUT 2 NO COM NC 120V COM 240V 1 2 3 4 SA SB 1 23 1 2 3 4 5 67 8 SA TOD 24V SB C/F M8113 SENSOR A 240 VAC SENSOR B LOAD 1 LOAD 2 BLK RED Fig. 7. Reset control with 24 V ac input, 24 V ac loads. Fig. 9. Reset control with 240 V ac input, 240 V ac load[...]

  • Page 7

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 7 SELECT SET ENTER OUTPUT 2 NO COM NC 120V COM 240V 1 2 3 4 SA SB 1 23 1 2 3 4 5 67 8 SA TOD 24V SB C/F M8115A SENSOR A 24 VAC SENSOR B LOAD 1 T1 T2 BR W 1 1 POWER INPUT USE SEPARATE TRANSFORMER FOR T775 WHEN POWERING FROM 24 VOLTS. T775J1019, T775J1043 PROVIDE ELECTRONIC SERIES 90 OUTPUT [...]

  • Page 8

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 8 Fig. 14. Reset control with Series 90 Modutr ol® Motor . Fig. 13. Reset control with 240 V ac input, 240 V ac and 0 to 18 Vdc loads. SELECT SET ENTER OUTPUT 2 NO COM NC 120V COM 240V 12 3 4 SA SB 1 23 1 2 3 4 5 67 8 SA TOD 24V SB C/F M8117 SENSOR A SENSOR B LOAD 1 T1 T2 C R F POWER INPU[...]

  • Page 9

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 9 Use shielded cable if any of the above conditions cannot be avoided. Device Setup 쐃 Determine the loads to be controlled and the operating mode (heat or cool) and enter on the worksheet. For example: Load 1: Compressor 1 (cool) Setpt 1 _____ On at _____ Diff 1 _____ Off at _____ 쐇 De[...]

  • Page 10

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 10 쐄 Determine the desired Reset Direction (up or down) and enter on the Device Programming Worksheet. This will determine if the setpoint for the control Sensor A will be reset up or down. 쐂 Determine the desired Reset Compensation Setpoint for Sensor B. Enter the value on the Device [...]

  • Page 11

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 11 쐎 Press Enter to enter the displayed value into memory . 쐅 Press Select four times to return to stage 1 parameters. Scroll through the programming loop a second time to confirm that the appropriate values have been entered into memory . NOTE: The T775J has three options for displayi[...]

  • Page 12

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 12 SELECT SET ENTER O P E N 1234 38 1 4 17 OPEN CLOSED VOLTAGE SPANS WHEN SWITCH IS DEPRESSED, THE VOLTAGE RANGE IDENTIFIED BY THE VOLTAGE SPAN BELOW THAT SWITCH IS SELECTED. IN THIS CASE, A VOLTAGE SPAN ON 8 VDC HAS BEEN SELECTED. THIS SPAN CAN BE 2-10 VDC, 10-18 VDC, ETC., BY USE OF ZERO[...]

  • Page 13

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 13 SENSED TEMPERATURE = 78 o F CALIBRATION SETPOINT 75 o F DEAD BAND DEAD BAND MODULATION HEATING MODE THROTTLING RANGE THROTTLING RANGE * DEADBAND IS 1/8 OF THE THROTTLING RANGE * DEADBAND IS 1/8 OF THE THROTTLING RANGE COOLING MODE CALIBRATION SETPOINT 81 o F SENSED TEMPERATURE = 78 o F [...]

  • Page 14

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 14 temperature goes down, the control point goes down). The type of ratio is selected by using the two DIP switches provided. The four possible reset operating configurations are illustrated and explained in Fig. 18. Switches 1 and 2 are shown but switches 3 and 4 are unused; however , the[...]

  • Page 15

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 15 • 4-20 mA: This is a general purpose current mode output that can drive a 600 ohm maximum load without output current 12 3 4 OPEN A C B D 12 3 4 OPEN A C B D 12 3 4 OPEN A C B D 12 3 4 OPEN A C B D A. SWITCH 1 CONTROLS THE RESET DIRECTION. LEFT RESETS SENSOR A CONTROL POINT (BOILER OR[...]

  • Page 16

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 16 degradation. This modulation output can be used with Honeywell Inc Modutrol IV TM Motors that accept an input signal of 4-20 mA or other Honeywell Inc motors with the use of resistor kits. • 0-18 Vdc (voltage ranging): This output mode is intended as a general purpose voltage output c[...]

  • Page 17

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 17 Display Once power is applied or restored to the device, the display will count down from 210 until the display reads zero, during which time any previously energized outputs will be de- energized. This is intended to protect compressors in the event of a power outage. To avoid viewing [...]

  • Page 18

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 18 CHECKOUT After the controller is installed and wired, apply power . Using the programmed control values, verify device operation after completing T able 3. 쐃 As illustrated in the example, record the sensed temperatures for both Sensor A and Sensor B as displayed on the controller . S[...]

  • Page 19

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 19 Ta b le 3. Check out T able . Checkout Table Checkout Table Example Heat or Cool Load 1 Load 2 Reset Value Load 1 Reset Value Load 2 Heat or Cool Load 1 Heat Load 2 Heat Reset Value Load 1 Reset Value Load 2 Sensor A ____ Sensor B ____ Sensed Temp Sensor A 80° Sensor B 10° Sensed Temp[...]

  • Page 20

    T775J ELECTRONIC REMOTE TEMPERA TURE CONTROLLER 63-2248—4 20 Helping You Control Your World Home and Building Control Honeywell Limited-Honeywell Limitée 740 Ellesmere Road Scarborough, Ontario M1P 2V9 63-2248—4 Rev . 9-95 Printed in U.S.A. www .honeywell.com/building/components QUALITY IS KEY Home and Building Control Honeywell Inc. 1985 Doug[...]