Bard WG3S2-A Installation Instructions Manual

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Manual 2100-587DPage 32 of 5824. FILTERSA 2" thick throwaway filter is supplied with each unit.This filter is installed by removing the filter accesspanel (see Figure 13).Replacement filters are available through the localdealer.25. COMPRESSOR CONTROL MODULEThe compressor control module is standard on themodels covered by this manual. The compressorcontrol is an anti-short cycle/lockout timer with highand low pressure switch monitoring and alarm relayoutput.Adjustable Delay-on-Make and Delay-on-Break TimerOn initial power up or anytime power is interrupted tothe unit, the delay-on-make period begins, which willbe 2 minutes plus 10% of the delay-on-break setting.When the delay-on-make is complete and the highpressure and low pressure switches are closed, thecompressor contactor is energized. Upon shutdown,the delay-on-break timer starts and prevents restartuntil the delay-on-break and delay-on-make periodshave expired.FIGURE 13Access Internal FilterDuring routine operation of the unit with no powerinterruptions, the compressor will operate on demandwith no delay.High Pressure Switch and Lockout Sequence(Standard Feature)If the high pressure switch opens, the compressorcontactor will de-energize immediately. The lockouttimer will go into a soft lockout and stay in soft lockoutuntil the high pressure switch closes and the delay-on-make time has expired. If the high pressure switchopens again in this same operating cycle, the unit willgo into manual lockout condition and the alarm circuitwill energize. Recycling the wall thermostat resets themanual lockout.Low Pressure Switch, Bypass and Lockout SequenceIf the low pressure switch opens for more that 120seconds, the compressor contactor will de-energize andgo into a soft lockout. Regardless of the state of thelow pressure switch, the contactor will re-energize afterthe delay-on-make time delay has expired. If the lowpressure switch remains open or opens again for longerthan 120 seconds, the unit will go into manual lockoutcondition and the alarm circuit will energize. Recyclingthe wall thermostat resets the manual lockout.MIS-3237FILTERFILTERSERVICEDOOR