Daikin Enfinity CCW Installation And Maintenance Manual

Daikin Enfinity CCW Installation And Maintenance Manual Manual pdf 43 page image

www.DaikinApplied.com 43 IM 1049-9DANGERTo avoid electrical shock, personal injury or death, be sure thatfield wiring complies with local and national fire, safety, andelectrical codes, and voltage to the system is within the limitsshown in the job-specific drawings and unit electrical data plate(s).Power supply to unit must be disconnected whenmaking field connections. To avoid electrical shock, personalinjury or death, be sure to rigorously adhere to field wiringprocedures regarding proper lockout and tagout of components.General Use and InformationThe Microtech III unit controller is provided with two driveterminals, R(24VAC) and C(0 VAC) that can be usedby the end user to drive the thermostat inputs (G, Y1,Y2, W1, and W2) and control inputs (U, E, and O). Anycombination of a single board drive terminal (R or C)may be used to operate the MicroTech III unit controller’scontrol or thermostat inputs. However, only one driveterminal (R or C) can be connected to any individualinput terminal or damage may result. Some controlinputs are not accessible to the end user (for example,HP, LP, SLTS, and COF).Typically the Microtech III unit controller’s R (24VAC)terminal is used to drive the board’s thermostat inputsand control inputs by connecting it to the R terminal ofan industry standard thermostat. The control outputsof the standard thermostat are then connected to theMicrotech III unit controller thermostat inputs and controlinputs as needed. Any remaining board input(s) maybe operated by additional thermostat outputs or remoterelays (dry contacts only).All Microtech III unit controller inputs must be operatedby dry contacts powered by the control board’s powerterminals. No solid state devices (Triacs) may be usedto operate the Microtech III unit controller inputs. Nooutside power source may be used to operate theMicrotech III unit controller inputs.general use and inforMation