Bard WG3S2-A Installation Instructions Manual

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Bard WG3S2-A Installation Instructions Manual Manual pdf 32 page image

Manual 2100-587CPage 32 of 5924. 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 your dealer.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 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 or break timer starts and prevents restart untilthe delay on break and delay on make periods haveexpired.During routine operation of the unit with no powerinterruptions, the compressor will operate on demandwith no delay.HIGH PRESSURE SWITCH AND LOCKOUTSEQUENCE (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, ANDLOCKOUT SEQUENCEIf the low pressure switch opens for more that 120seconds, the compressor contactor will de-energizeand go into a soft lockout. Regardless the state ofthe low pressure switch, the contactor will reenergizeafter the delay-on-make time delay has expired. If thelow pressure switch remains open or opens again forlonger than 120 seconds the unit will go into manuallockout condition and the alarm circuit will energize.Recycling the wall thermostat resets the manuallockout.FIGURE 13ACCESS INTERNAL FILTERMIS-3237FILTERFILTERSERVICEDOOR