Parker HDK-CNG Series Operating Manual

Contents

Parker HDK-CNG Series Operating Manual Manual pdf 22 page image

Available options22 HDK-CNG_EN_03_2016Available optionsThe following options are available for the dryer: Dewpoint-sensing control Regeneration gas cooler Auxiliary heaterDewpoint-sensing controlWith a dewpoint-sensing control system, you can operate the dryer in fixed orvariable cycles. In the variable cycle, the switchover is effected in relation to thedew point reached and the charging of the drying agent .Dryers with the optional dewpoint-sensing control are equipped with a further(second) signal contact; it is additionally used for the output of dewpoint alarms.Regeneration gas coolerWith an air-gas heat exchanger, the regeneration gas can also be cooled,enabling the water to condense out more effectively.Auxiliary heaterFor installation sites with temperatures under +15ºC, the wet side of the dryermust be equipped with an auxiliary heater to prevent valves, cocks, flaps, andother components from freezing up (methane hydrate).Signalling contacts of the control systemThe control system is equipped with a digital input for the synchronised operationwith a compressor. This feature allows for synchronised and thus efficient dryeroperation with discontinuous compressor operation.The control system can also be equipped with an optional operation signallingcontact with which the dryer operation can be controlled from an external device.This means that dryer operation can be started and stopped externally.