Carrier UC Open Installation And Startup Manual

Carrier UC Open Installation And Startup Manual Manual pdf 9 page image

Installing the UC OpenUC Open CARRIER CORPORATION ©2019Installation and Start-up Guide All rights reserved5Wiring the UC Open for powerWARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.CAUTIONS• The UC Open is powered by a Class 2 power source. Take appropriate isolation measures when mounting it ina control panel where non-Class 2 circuits are present.• Carrier controllers can share a power supply as long as you:• Maintain the same polarity.• Use the power supply only for Carrier controllers.To wire for power1 Remove power from the power supply.2 Pull the screw terminal connector from the controller's power terminals labeled Gnd and Hot.3 Connect the transformer wires to the screw terminal connector.NOTE If using a grounded transformer, connect the ungrounded lead to the Hot terminal to avoid damagingthe transformer.4 Apply power to the power supply.5 Measure the voltage at the UC Open’s power input terminals to verify that the voltage is within the operatingrange of 21.6–26.4 Vac.6 Insert the screw terminal connector into the UC Open's power terminals.7 Verify that the Power LED is on and the Run LED is blinking.Addressing the UC OpenYou must give the UC Open an address that is unique on the network. You can address the UC Open before orafter you wire it for power.1 If the UC Open has been wired for power, pull the screw terminal connector from the controller powerterminals labeled Gnd and Hot. The controller reads the address each time you apply power to it.