Parker HDK-CNG Series Operating Manual

Contents

Parker HDK-CNG Series Operating Manual Manual pdf 44 page image

Daily maintenance tasks44 HDK-CNG_EN_03_2016Daily maintenance tasksCarry out visual and function check on the complete dryer► Check dryer for external damage or unusual noise generation.► Duly eliminate any defects found.Clean dryerATEX-compliant dryersA buildup of dust on the dryer can be dangerous. The dryer must therefore becleaned regularly. The cleaning interval depends on the dust loading of theambient air. The more dust in the air, the more frequently the dryer needs to becleaned.Warning of static charge!With ATEX-compliant dryers, never use dry textiles for cleaning purposes.The friction they produce can cause static discharge. That in turn couldcreate a combustion source.Therefore always clean dryers with damp cloths!► Clean the dryer regularly with a damp cloth to prevent any hazardousbuildup of dust.► Only dampen the cloth with water, wring it out well, and do not useadditives!Dryers that are not intended for an ATEX environment► Clean the dryer once a week with a damp cloth.► Only dampen the cloth with water, wring it out well, and do not use additives!Check dam pressureIf, following depressurisation of a vessel, e.g. after the expansion phase, thepositive pressure has not decreased to compressor inlet pressure (CIP), thenthere is a residual pressure, designated as dam pressure, in the vessel.► Check for dam pressure: if the dryer functions correctly, the respectivepressure gage indicates CIP. Then there is no dam pressure.If the dam pressure is greater than 1 bar:► Depressurise the dryer and shut it down (see page 39).Dam pressure can be caused by: a regeneration gas return line, a blocked dust sieve or drying agent which is too old.The respective necessary maintenance measures are described in the followingsections.Check function of all condensate trapCheck the electronic condensate drain in accordance with details in the manualof the condensate drain.