Bard W24G1-A Installation Instructions Manual

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Bard W24G1-A Installation Instructions Manual Manual pdf 33 page image

Manual 2100-525APage 33 of 6724. FILTERSA 2" thick throwaway filter is supplied with each unit.This filter is installed by opening the main service door.(See Figure 16.)Replacement filters are available through your dealer.25. COMPRESSOR CONTROL MODULEThe compressor control is an anti-short cycle/lockouttimer with high and low pressure switch monitoring andalarm output.ADJUSTABLE DELAY-ON-MAKE AND BREAKTIMEROn a call for compressor operation the delay-on-makeperiod begins which will be 10% of the delay-on-breaksetting. When the delay-on-make is complete and thehigh pressure switch (and low pressure switch ifemployed) is closed, the compressor contactor isenergized. Upon shutdown, the delay-on-break timerstarts and prevents restart until the delay-on-break anddelay-on-make periods have expired.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 SEQUENCENOTE: The low pressure switch is an optionalcontrol and the bypass and lockout sequenceare part of the standard compressor controlmodule.If the low pressure switch opens for more that 120seconds, the compressor contactor will de-energize andgo into a soft lockout. Regardless the state of the lowpressure switch, the contactor will reenergize after thedelay-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.Recycling the wall thermostat resets the manuallockout.FIGURE 16ACCESS INTERNAL FILTERTHROUGH UPPER SERVICE DOOR