Bard WE252 Installation Instructions Manual

Contents

Bard WE252 Installation Instructions Manual Manual pdf 17 page image

Manual 2100-385BPage 15ADJUSTMENTSAdjustable Delay on Make and Delay on BreakTimerThe potentiometer is used to select Delay on Break timefrom 30 seconds to 5 minutes. Delay on Make (DOM)timing on power-up and after power interruptions isequal to 2 minutes plus 10% of Delay on 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 secondsPHASE MONITORAll units with three phase compressors are equippedwith a 3 phase line monitor to prevent compressordamage 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 unit factorywires as damage may occur.PRESSURE SERVICE PORTSLiquid and suction pressure service ports are installedon all units 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.