Bard WA611 Installation Instructions Manual

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Bard WA611 Installation Instructions Manual Manual pdf 18 page image

Manual 2100-425Page 16PHASE MONITORAll units with three phase scroll compressors areequipped with a 3 phase line monitor to preventcompressor damage due to phase reversal.The phase monitor in this unit is equipped with twoLEDs. If the Y signal is present at the phase monitorand phases are correct the green LED will light.If phases are reversed, the red fault LED will be lit andcompressor operation is inhibited.If a fault condition occurs, reverse two of the supplyleads to the unit. Do not reverse any of the unitfactory wires as damage may occur.PRESSURE SERVICE PORTSHigh and low pressure service ports are installed on allunits so that the system operating pressures can beobserved. Pressure tables can be found later in themanual covering all models. It is imperative to matchthe correct pressure table to the unit by model number.ADJUSTMENTSAdjustable Delay on Make and Delay on BreakTimerThe potentiometer is used to select Delay on Breaktime from 30 seconds to 5 minutes. Delay on Make(DOM) timing on power-up and after powerinterruptions is equal to 2 minutes plus 10% of Delayon Break (DOB) setting:0.5 minute (30 seconds) DOB =123 second DOM1.0 minute (60 seconds) DOB =126 second DOM2.0 minute (120 seconds)DOB =132 second DOM3.0 minute (180 seconds)DOB =138 second DOM4.0 minute (240 seconds)DOB =144 second DOM5.0 minute (300 seconds)DOB =150 second DOMDuring routine operation of the unit with no powerinterruptions the compressor will operate on demandwith no delay.Typical Settings for Dual Unit Installation:Unit 1: DOB set at 2 minutes, and DOM is 132 secondsUnit 2: DOB set at 4 minutes, and DOM is 144 seconds