Bard W24G2-A Installation Instructions Manual

Bard W24G2-A Installation Instructions Manual Manual pdf 33 page image

Manual 2100-590APage 33 of 6724. FILTERSA 2" thick throwaway filter is supplied with each unit.This filter is installed by opening the filter service door.(See Figure 16.)Replacement filters are available through your dealer.25. COMPRESSOR CONTROL MODULEThe compressor control module is standard on modelscovered by this manual. The compressor control is ananti-short cycle/lockout timer with high and lowpressure switch monitoring and alarm relay output.ADJUSTABLE DELAY-ON-MAKE AND BREAKTIMEROn initial power up or any time power is interrupted tothe unit, the delay on make period begins, which will be2 minutes plus 10% of the delay on break setting.When the delay on make is complete and the highpressure switch (and low pressure switch, if employed)is closed, the compressor contactor is energized. Uponshutdown, the delay on break timer starts and preventsrestart until the delay on break and delay on makeperiods have expired.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 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 DOORMIS-3237FILTERFILTERSERVICEDOOR