Bard W24G2DA Installation Instructions Manual

Contents

Bard W24G2DA Installation Instructions Manual Manual pdf 34 page image

Manual 2100-592CPage 34 of 6924. FILTERSA 2" thick throwaway filter is supplied with each unit.This filter is installed by opening the filter service door(see Figure 14).Replacement filters are available through a 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 Delay-on-Break TimerOn 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 andthe high pressure switch (and low pressure switch,if employed) 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.FIGURE 14Access Internal Filter Through Upper Service DoorHigh 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 SequenceNOTE: The low pressure switch is an optional controland the bypass and lockout sequence are partof the standard compressor control module.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 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