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Honeywell T775 Series Application Manual And Cross Reference

2000 electronic stand-alone controllers
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T775 Series 2000 Electronic Stand-Alone
Controllers
APPLICATION GUIDE AND CROSS REFERENCE
63-7147—3

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  Summary of Contents for Honeywell T775 Series

  • Page 1 T775 Series 2000 Electronic Stand-Alone Controllers APPLICATION GUIDE AND CROSS REFERENCE 63-7147—3...
  • Page 2: Table Of Contents

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS IMPORTANT T775 Applications ............8 The T775R is an operating control, not a limit or Water Source Heat Pump Loop Water Controller – safety control. If used in applications requiring safety T775B ................8 or limit controls, a separate safety or limit control Chiller –...
  • Page 3: T775 Application Tips

    • Spring return models: ML6425, ML7425, MS4105, MS4110, MS4120, MS7505, MS7510, MS7520, MS8105, MS8110, MS8120 Q What are the T775 Series 2000 Controller specifications? • Non-spring return models: ML4161, ML6174, ML7161, ML7164, MN1010, MN6105, MN7505, MN8810 A Refer to the T775 Series 2000 Electronic Stand-Alone Controllers - Specification Data (form 63-1318-01).
  • Page 4: Accessories

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS FEATURES See form 62-0265 - Temperature Sensor for the T775 Series 2000 Stand-alone Controller In Table 1, a check mark (!) indicates that the controller Accessories model has this feature. A number indicates the quantity (e.g., the T775M2030 has 4 standard SPDT relay outputs), and •...
  • Page 5 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Table 1. T775 Controller Features by Model Number. (Continued) Feature Pump Output (configurable for last relay) Number of outputs Prepurge/Postpurge Pump Exercise Sensor Inputs Number of sensor inputs Number of sensors included 1097 Ohms PTC at 77° F (25° C)
  • Page 6: T775 Operations

    The integral time is factory set for 400 seconds and is similar to the response time to the T775 Series 1000 models. This is HEATING MODE SETPOINT AND DIFFERENTIAL a good middle range and should satisfy many applications.
  • Page 7: Reset Programming (T775L, T775P, T775R, And T775U Models Only)

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Reset Programming (T775L, T775P, T775R, Choose Reset = NO for any outputs you do not wish to reset, then press the HOME button to record your selection. and T775U models only) NOTES: To program an output for reset, refer to the values as shown in A single reset curve is programmed for the first the example below and in Fig.
  • Page 8: T775 Applications

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775 APPLICATIONS Water Source Heat Pump Loop Water Relay 4: High temperature alarm circuit Program for: Controller – T775B — Cool — Setpoint = 95° F (35° C) — Differential = 1° F (-17° C)
  • Page 9: Chiller - T775B

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Chiller – T775B Relay 4: Controlling dumping of sump at freeze condition Program for: — Heat Application Description — Setpoint = 50° F (10° C) — Differential = 10° F (-12° C) As the water temperature in the sump rises, the T775B...
  • Page 10: Chiller, Rotary Compressor - T775B

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Chiller, Rotary Compressor – T775B SENSOR A (DISCHARGE WATER) Application Description The T775B is controlling the discharge water temperature of a rotary compressor. The T775B provides an optional low T775B temperature or low pressure cut-out circuit.
  • Page 11: Cooling Tower Control - T775B2040

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Cooling Tower Control – T775B2040 Wiring All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring Application Description The T775B2040 is controlling a cooling tower fan, based on...
  • Page 12: Time-Based Control Of Fan, Pump, Etc. - T775 (All Models)

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Time-based Control of Fan, Pump, etc. – NOTE: Keep in mind that if the scheduler is energized, all relays will follow the time schedule. If you do not T775 (all models) want some outputs to go into a setback mode,...
  • Page 13: Damper Or Valve Modulation - T775M Or T775R

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Damper or Valve Modulation – T775M or T775R MS75xx SPRING RETURN DIRECT COUPLED ACTUATOR (DCA) Application Description WIRING STRIP In this example, a T775M is controlling an actuator, based on (HOT) temperature input, to modulate a damper or valve.
  • Page 14: Hot Water Reset - T775R

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Hot Water Reset – T775R MENU MENU PROGRAM Application Description PROGRAM PROGRAM RELAY 2 RELAY 2 RELAY 2 OFFSET The T775R is controlling the boiler water temperature with two OFFSET stages (relays), based on outside temperature using a reset DIFFRNTL curve and an offset for relay 2.
  • Page 15 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Hot Water Reset (continued) Device Checkout The T775 performance can be checked out to determine if proper operation exists. Wiring All output relays should have a common power wiring source, For example, when the outside air temperature is at 50° F which may or may not be the same as the T775 power wiring.
  • Page 16: Chilled Water Reset - T775R

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Chilled Water Reset – T775R Relay 1: Control to the chilled water temperature Program for: (Refer to the reset curve in Fig. 15.) — Setpoint Max A1 (Chiller) = 60° F (16° C) Application Description —...
  • Page 17 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Chilled Water Reset (continued) From the Home screen, use the $ button to verify the setpoint temperature for each output. Then, press the HOME button to view the actual Device Checkout outside air temperature (sensor B).
  • Page 18: Multi-Stage Boiler Control (No Reset) - T775P

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Multi-Stage Boiler Control (No Reset) – Refer to the staging diagram in Fig. 18 for individual stage behavior. T775P STAGES Application Description STAGE 3 ON The T775P is providing multistage boiler control based on the HYST.
  • Page 19: Multi-Stage Boiler Control (Reset) - T775P

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Multi-Stage Boiler Control (Reset) – T775P IMPORTANT After the desired value is selected, be sure to press the # or $ or HOME button in order to save that Application Description value in the controller’s memory.
  • Page 20 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Multi-Stage Boiler Control (Reset) NOTE: Control can be to either sensor A or C. (continued) Operation In this 3-stage example, as the cooling load increases, SENSOR A additional stages of cooling will cycle ON as the chiller water...
  • Page 21: Multi-Stage Chiller Control (No Reset) - T775P

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Wiring All output relays should have a common power wiring source, which may or may not be the same as the T775 power wiring. SENSOR A SENSOR B (OUTSIDE AIR) (CHILLER DISCHARGE WATER) SENSOR C...
  • Page 22 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS — STG8/Pump: (Relay 8 controls the pump output) IMPORTANT Enable = YES By programming the boiler setpoint at 210° F Exercise = YES or NO (-99° C) the T775 has established 210° F (-99° C) as...
  • Page 23 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS 4 Stage with Pump Output and Reset Wiring All output relays should have a common power wiring source, (continued) which may or may not be the same as the T775 power wiring. SENSOR B...
  • Page 24: Stage Reciprocating Chiller - T775L

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS 3 Stage Reciprocating Chiller – T775L SENSOR A (RETURN WATER) Application Description SENSOR B (DISCHARGE The T775L is controlling the return water in a reciprocating WATER) chiller with fast-dump freeze protection, low temperature T775L cutoff, and optional low pressure cutoff.
  • Page 25: Stage Heat And 6 Stage Cool - T775L

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS 4 Stage Heat and 6 Stage Cool – T775L Loop 2: Control to sensor B Program for: — Setpoint = 72° F (22° C) Application Description — Throttling Range = 12° F (-11° C) The T775L is providing control for four boilers based on the —...
  • Page 26 4 Stage Heat and 6 Stage Cool (continued) SENSOR B SENSOR A T775L FIRST SECOND T775S T775S – – – – (HOT) 24 VAC 4 120 VAC 4 120 VAC (HOT) RELAY RELAY RELAY RELAY RELAY RELAY HEAT COOL HEAT COOL COOL RELAY...
  • Page 27: Pressure With A Variable Frequency Drive (Vfd) - T775U

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Pressure with a Variable Frequency Drive IMPORTANT After the desired value is selected, be sure to press (VFD) – T775U the # or $ or HOME button in order to save that value in the controller’s memory.
  • Page 28: Carbon Dioxide (Co2) Sensing - T775U

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Carbon Dioxide (CO ) Sensing – T775U Table 2. CO PPM to % conversion. Application Description Percentage Display In this application, the T775U is controlling an outside air damper based on CO sensing input, to maintain reasonable levels.
  • Page 29: T775 Application Replacement Examples

    EXAMPLES This replacement example illustrates how a T775M2030 is configured to replace a two-stage Heat and two-stage Cool This section describes how a T775 Series 2000 Electronic W973A Logic Panel. Stand-Alone Controller is wired and programmed to replace various older generation Honeywell devices.
  • Page 30 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775M2030 Replacement for W973A Logic NOTE: Fig. 35 is for wiring purposes only. A thorough review of the existing W973A application is required in order Panel (continued) to determine the capability of the T775 controller replacement.
  • Page 31 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775M2030 Replacement for W973A Logic In this replacement application, the T775M2030 provides the following, as described in Table 3: Panel (continued) Table 3. T775M2030 Replacement for W973A Component/Function W973A Logic Panel T775M2030 Replacement Thermostat T7067 Sensor A (Room) - C7130B1008.
  • Page 32: T775R Replacement For W964F Aquatrol Panel With Floating Actuator

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775R Replacement for W964F Aquatrol Panel with Floating Actuator This replacement example illustrates how a T77R is configured to replace a W964F Aquatrol Panel. • Fig. 36 illustrates the wiring connections for the W964F Aquatrol Panel.
  • Page 33 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775R Replacement for W964F Aquatrol NOTE: Fig. 37 is for wiring purposes only. A thorough review of the existing W964F application is required in order Panel with Floating Actuator (continued) to determine the capability of the T775 controller replacement.
  • Page 34 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775R Replacement for W964F Aquatrol Panel with Floating Actuator (continued) In this replacement application, the T775R provides the following, as described in Table 4. Table 4. T775R Replacement for W964F Component/Function W964F Aquatrol T775R Replacement...
  • Page 35: T775L Replacement For S984 Step Controller

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775L Replacement for S984 Step Controller Fig. 38 illustrates the wiring connections for the S984 Step Controller. This replacement example illustrates how a T775L using a T775S Expansion module is configured to replace a S984 Fig.
  • Page 36 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775L Replacement for S984 Step Controller NOTE: Fig. 39 is for wiring purposes only. A thorough review of the existing S984 application is required in order to (continued) determine the capability of the T775 controller replacement.
  • Page 37: T775L Replacement For W7100C Discharge Air Controller

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775L Replacement for W7100C Discharge Fig. 40 illustrates the wiring connections for the W7100C Discharge Air Controller. Air Controller Fig. 41 and Table 6 on page 39 illustrate the wiring and This replacement example illustrates how a T775L using a configuration of the T775L controller.
  • Page 38 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775L Replacement for W7100C Discharge NOTE: Fig. 41 is for wiring purposes only. A thorough review of the existing W7100C application is required in Air Controller (continued) order to determine the capability of the T775 controller replacement.
  • Page 39 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS T775L Replacement for W7100C Discharge In this replacement application, the T775L provides the following, as described in Table 6: Air Controller (continued) Table 6. T775L Replacement for W7100C. W7100C Component/Function Discharge Air Controller T775L Replacement...
  • Page 40: T775 Cross Reference

    Length Replacement (Order Sep.) Replacement (Order Sep.) Comments NOTE: For all T775 Series 2000 Controllers, the Setpoint Temperature Range is -40° to 248° F (-40° to 120° C). Johnson System 350 A350A/B Johnson T775A2009 Johnson model: 1 SPDT temperature A350A/B with...
  • Page 41 T775U2006 Johnson model: 1 mod pressure with 2 SPDT to 2 S352s Any system Johnson See comment. All T775 Series 2000 controllers have an LCD with D350 display Any system Johnson See comment. All T775 Series 2000 controllers can accept 24...
  • Page 42 The T775R is a Reset controller T475A1057 Honeywell 70 to 140 SPST 10/30 ft. T775R2035 5001774-001 The T775R is a Reset controller T6031A1011 Honeywell 15 to 90 SPDT 5 ft. T775A2009 5001774-001 T6031A1029 Honeywell -30 to 90 SPDT 8 ft.
  • Page 43 Table 7. Cross Reference. (Continued) Recommended Recommended Temperature ° F Honeywell Honeywell Honeywell Honeywell / Humidity Switch Electromechanical Well # Electronic Well # Control Manufacturer Range (RH) Action Length Replacement (Order Sep.) Replacement (Order Sep.) Comments T675A1508 Honeywell 0 to 100 SPDT 5 ft.
  • Page 44 Table 7. Cross Reference. (Continued) Recommended Recommended Temperature ° F Honeywell Honeywell Honeywell Honeywell / Humidity Switch Electromechanical Well # Electronic Well # Control Manufacturer Range (RH) Action Length Replacement (Order Sep.) Replacement (Order Sep.) Comments T775B1000 Honeywell -20 to 240...
  • Page 45 Table 7. Cross Reference. (Continued) Recommended Recommended Temperature ° F Honeywell Honeywell Honeywell Honeywell / Humidity Switch Electromechanical Well # Electronic Well # Control Manufacturer Range (RH) Action Length Replacement (Order Sep.) Replacement (Order Sep.) Comments A18ABC-24 Johnson -30 to 100 SPDT 8 ft.
  • Page 46 Table 7. Cross Reference. (Continued) Recommended Recommended Temperature ° F Honeywell Honeywell Honeywell Honeywell / Humidity Switch Electromechanical Well # Electronic Well # Control Manufacturer Range (RH) Action Length Replacement (Order Sep.) Replacement (Order Sep.) Comments A28AA-28 Johnson 30 to 110 2-SPDT 6 ft.
  • Page 47 Table 7. Cross Reference. (Continued) Recommended Recommended Temperature ° F Honeywell Honeywell Honeywell Honeywell / Humidity Switch Electromechanical Well # Electronic Well # Control Manufacturer Range (RH) Action Length Replacement (Order Sep.) Replacement (Order Sep.) Comments A80ABA-4 Johnson 120 to 200 135 Ohm 6 ft.
  • Page 48 Table 7. Cross Reference. (Continued) Recommended Recommended Temperature ° F Honeywell Honeywell Honeywell Honeywell / Humidity Switch Electromechanical Well # Electronic Well # Control Manufacturer Range (RH) Action Length Replacement (Order Sep.) Replacement (Order Sep.) Comments 241-2 White Rodgers 20 to 90 SPST 8 ft.
  • Page 49 Table 7. Cross Reference. (Continued) Recommended Recommended Temperature ° F Honeywell Honeywell Honeywell Honeywell / Humidity Switch Electromechanical Well # Electronic Well # Control Manufacturer Range (RH) Action Length Replacement (Order Sep.) Replacement (Order Sep.) Comments TC4316 Barber Colman -40 to 120 SPDT 6 ft.
  • Page 50 Table 7. Cross Reference. (Continued) Tekmar Model & T775 Cross Features Our Stage Nine Stage T775P2003 & (2) One Stage T775A2009 Two Stage T775B2032 One Stage T7775P2003 T775R2035 One Stage Boiler T7775P2003 T775R2035 Two Stage Boiler & T7775P2003 T775P2003 Boiler & DHW Boiler &...
  • Page 51: Notes

    T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS NOTES 63-7147—3...
  • Page 52 T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9 customer.honeywell.com ® U.S. Registered Trademark © 2008 Honeywell International Inc.