Parker HDK-CNG Series Operating Manual

Contents

Parker HDK-CNG Series Operating Manual Manual pdf 33 page image

CommissioningHDK-CNG_EN_03_2016 33Checks before start-upPurge system before start-up!The dryer was subjected at the plant to a leak test using compressed airand is supplied with a positive pressure of +0.5 bar.Prior to commissioning, the dryer must be purged using a suitablemedium to remove any residual humidity or oxigen!Warning!Interrupt the start-up procedure if the controller displays an errormessage. All displayed faults must be rectified prior to start-up.Ensure that all pipe, cable and bolt connections on the dryer have been retightened, no pipes chafe against body edges, All earthing connections have been made correctly all connections on the dryer are sealed. all mountings are perfectly secure, the electrical connections are in safe contact and in good condition, owner-end and pressurised parts such as safety valves or other devices arenot blocked up by dirt or paint, all natural gas system components which are pressurised (valves, hoses etc.)are free from wear symptoms and defects.Note:Run the dryer at least for 24 hours after commissioning so that thedewpoint sensor displays a precise dewpoint.Setting times of the operating phasesIn its standard version the dryer is delivered with a time-dependent controlsystem. The phase sequence occurs in a fixed cycle.With the optional dewpoint-sensing control the dryer can also be operated atvariable cycles (depending on the dewpoint).The following table provides information on the duration of the individual phases.Phase duration Fixed cycle Short cycle Variable cycle FixAdsorption 60 min ~ 20 min 120 min, max 35 minRegeneration, total 60 min ~ 20 min 60 min 35 min of which: expansion time ~ 3 min ~ 1 min 5 min of which heating ~ 50 min ~ 15 min ~ 50 min 20 min of which cooling ~ 5 min ~ 7 min 7 min of which: pressure build-up ~ 2 min ~ 2 min 2:30 minStandby — ~ 60 min, max