Page 28 AD Series Dehumidifying Dryers4-3 Making Electrical Connections; The serial tag lists voltage, phase, and amp draw information.; Line voltage must be within plus or minus ten percent (±10%)of the voltage listed on the serial tag, or damage may occur.Phase imbalance must be less than two percent (2%).; Fulfill all national, state, and local safety and electrical coderequirements.; A qualified electrician should make all electrical connections.; Make sure all electrical connections are tight.; Connect main power to the dryer at the disconnect or terminalsin the upper right corner of the control enclosure.; Install a fused disconnect with a lockout feature in the powermain leading to the dryer.; The power drop must include a ground wire.4-4 Checking for Proper Blower RotationThree-Phase ModelsThe blower rotates properly when air flows from the deliveryoutlet.CAUTION!In three-phase models, incorrect phasing of power leadscan cause backward rotation of blower motorsand CONTAMINATION OF THE DESICCANT!Always check blower rotation before putting material in the dryinghopper!If the three-phase blower rotates improperly, reverse any two wiresat the fused disconnect outside the dryer or at thedisconnect/terminal in the control enclosure. This assures that theblower rotates in the proper direction.Note: Holding your hand in front of the air return will alsoindicate if the blower rotates in the proper direction.