Honeywell AC-220-7, AC-140-7 manual Wiring Connections Access, Temperature Sensor Wiring

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T775A/B/M SERIES 2000 CONTROLLER

WIRING

Wiring Connections Access

To access the wiring connections, remove the two screws on the left side of the enclosure and gently swing open the top. Be careful to not stress the ribbon cables that connect the keypad and LCD display to the controller circuit board.

Temperature Sensor Wiring

CAUTION

Electrical Shock Hazard.

Can short equipment circuitry.

Make sure that metal tube of sensor does not short against T terminals in wall-mounted case.

IMPORTANT

Poor wiring practices can cause erratic readings from the sensor. Avoid the following to ensure proper operation:

•Do not route the temperature sensor wiring with building power wiring.

•Do not locate the temperature sensor wiring next to control contactors.

•Do not locate the temperature sensor wiring near electrical motors.

•Do not locate the temperature sensor wiring near welding equipment.

•Make sure good mechanical connections are made to both the sensor and the controller.

•Do not mount the sensor with the lead wire end pointing up in an area where condensation can occur.

If any of the above conditions cannot be avoided, use shielded cable.

NOTE: Each T775 controller must be wired to its own sensor(s). However, a benefit of the T775 controller’s accuracy is that there is no more than a 2°F differential between any two T775 controllers.

Multiple Parallel Sensors

Multiple sensors can be parallel-series wired to sense average temperatures in large spaces. To maintain control accuracy, the number of sensors to be parallel- series wired must be of the n2 power (for example, 4, 9, 16, etc.). See Fig. 3.

SENSORS

TO T775 CONNECTIONS (SENSOR A) OR (SENSOR B).

M24471

Fig. 3. Parallel-series wiring of sensors.

Temperature Sensor Wire Type and Size

Temperature sensors use standard AWG 18/2 unshielded wire. For cable runs greater than 25 feet or where electrical interference may be a problem, shielded cable is recommended. See Fig. 4.

Refer to “Temperature Sensor Calibration” on page 10 for wire size selection where cable runs are longer than 25 feet.

SHIELDED

CABLE

T

T

SENSOR A

1

NOTE: SHIELDED CABLE MUST BE CONNECTED TO AN EARTH

T SENSOR B

T

SHIELDED

CABLE

1SENSOR A AND SENSOR B TERMINAL WIRING IS POLARITY INSENSITIVE.

GROUND.

HOWEVER, DO NOT GROUND SHIELDED CABLE AT SENSOR END.

SENSOR

NOTE: TO MINIMIZE NOISE PICKUP, MAKE SENSOR CONNECTION FROM SHIELDED CABLE AS CLOSE AS POSSIBLE TO SENSOR BODY.

M24472

Fig. 4. Sensor wiring — showing shielded cable connection to Sensor A.

62-0254–03

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Contents FP-4 Freeze Protection KIT Section IntroductionInstallation SectionInstalling the Conduit Section Installation Control BOX Component Layout and Wiring DiagramSetting the Controller OperationSection Troubleshooting Troubleshooting ProceduresSection Replacement Parts Replacement PartsSection Warranty PER VAN AIR Terms and Conditions of SaleProduct Description Temperature Sensorsa Controller DimensionsAccessories Before Installation Installation and SetupWiring MountingWiring Connections Access Temperature Sensor WiringTemperature Sensor Wire Type and Size Multiple Parallel SensorsController Wiring Controller Wiring MethodWiring Applications Examples Controller Wiring DetailsDescription of Wiring Terminal Connections Terminal Label Connection Terminal Label Description SensorsWiring for four-stage control 24 Vac input 24 Vac load Wiring for ML7984 valve actuator Wiring for three Series 90 Modutrol Motors Power Loss Temperature Sensor CalibrationCheckout Foota MΩ/ft Rating 200 ft 500 ft 000 ftUsing the LCD Panel Interface Interface OverviewHome Screen Accessing the Menus Using the MenusSetup Menu Programming, Scheduling, and Summary MenusHeating Mode Setpoint and Differential Cooling Mode Setpoint and DifferentialProgramming Setpoint and DifferentialEntering Program Mode Programming the T775A/B/M ControllerProgram Menu for Outputs Differential or Throttling Range SensorHEAT/COOL Exiting Program Mode SetbackProgram Next Output Mod or Relay Setup Advanced Options Setup ProcedureEntering Setup Mode Setting up the SensorsSensor a Units F or CCalibrate the sensor Label the sensor inputExit Sensor a Setup Sensor BCalibrate LabelHI Limit or LOW Limit Sensor B only Limit Sensor B onlySetting up the Outputs Setting up the Modulating OutputsThrottling Range Sensor B only Type of output signal MIN OUT %Integral Schedule ExitOptions USE SchedMIN OFF minimum off time for all relays DI Options digital input optionsShow RT show run time hours Exit Options Setup Setting up the RelaysType standard or floating Floating Relay Menu Reset RT run time hours Derivative modulating/floating relay onlyExit Setup Mode Setup Outputs Relay ExitEntering Schedule Mode SchedulingCreating a Schedule SET Time SET DateDaylight daylight saving time Setting Individual Schedules Mon-Fri Schedule Defaults1. E1 Setpt setpoint for event Exiting Scheduling Mode Exit exit from selected time period settings2. E1 Time time for event 3. E2 Setpoint setpoint for eventTroubleshooting Errors and DiagnosticsError Message Diagnostic MessagesSafety Compliance Emissions ComplianceImmunity Compliance FCC Compliance StatementDOC T775A/B/M Series 2000 Controller

AC-220-7, AC-140-7 specifications

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Both models are equipped with state-of-the-art technologies, including smart diagnostic features that help users troubleshoot issues quickly and efficiently. This capability not only enhances the user experience but also prolongs the lifespan of the units. Furthermore, these units are easy to install and maintain, with accessible components for service and cleaning.

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In summary, the Honeywell AC-140-7 and AC-220-7 units are excellent examples of innovation in air conditioning solutions. With their combination of efficiency, advanced features, and quiet operation, these models represent a significant investment in comfort and sustainability for any space. Whether cooling a small room or a larger area, Honeywell’s engineering excellence ensures that users enjoy effective climate control tailored to their needs.
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