Parker MAXIGAS MX104 User Manual

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Parker MAXIGAS MX104 User Manual Manual pdf 16 page image

164.5 Start Clean UpThe clean up cycles are designed to clean the CMS bed of impurities, bring the generator up to production purity more rapidly, and prevent poorquality gas flowing into the buffer. The operation of the cycle is dependant upon the purity as described below:Rapid Cycle – this cycle is used for lower purity generators (0.05 – 5.0%). The chambers are filled and exhausted alternately on a fixedcycle time. The Rapid Cycle takes 160 seconds to complete.Pure Start - The higher purity generators (10 - 100ppm) require a two stage cleaning process:Pure Start A – with the N2 outlet to buffer valve closed, the chambers are filled and exhausted alternately.Pure Start B – immediately following Pure Start A the N 2 outlet to buffer valve is opened to allow gas flow into the buffer vessel.The chambers are then filled and exhausted again.The pure start cycle times are dependant upon the production purity of the generator.On completion of the start up cycles the N 2 outlet valve will open, allowing gas to be delivered to the application.4.6 Economy ModeEconomy mode is designed to switch the generator into standby mode when there is no demand for gas.The generator monitors the outlet pressure and if it exceeds a pre-determined level for a sustained period of time (Economy Period *), the N 2outlet valve will close. The generator will continue to cycle as normal without delivering gas to the application. If the back pressure is maintainedfor an additional 5 minutes, the generator will stop cycling and enter Economy mode.When the pressure falls below the regulated outlet pressure, the generator will resume normal operation. If the generator is in Economy modewhen this occurs, it will run through the relevant clean up cycle.The Economy over-ride facility (optional) can be used to maintain the beds when the generator is in economy mode. If the over-ride is enabled,a clean up cycle will be performed once every 20 minutes. This allows the generator to go straight on-line when the outlet pressure falls belowthe regulated outlet pressure.*The Economy Period is factory set to 5 minutes.PRODUCTION PURITY PURE START CYCLEA B10 ppm 4 x 120 120/90100 ppm 4 x 90 90/700.05% 4 x 90 90/70The Start clean up cycle can be disabled within the customer settings menu, however Parker domnick hunterstrongly recommend that the start up cycles remain enabled.The economy mode can be disabled within the customer settings menu, however Parker domnick hunterstrongly recommend that this option remains enabled.