MN240-1 Rev C234.0 Provider Instructions4.1 Routine MaintenanceTo ensure that the unit’s output of oxygen is within specification, you must perform a testof the oxygen concentration. Test the unit upon delivery to a user and at periodicintervals. Equipment Providers need to establish and implement a protocol to checkoxygen concentration.CAIRE does not require preventative maintenance on the concentrator. You do not need toperform any maintenance as long as the NewLife unit remains within specifications at thedesired flow rate.4.1.1 Air Intake Gross Particle Filter/GPFThe external air intake gross particle filter is located on the back of the unit. Youcan easily remove it by hand. Instruct the user to clean this filter weekly. (Refer toSection 3.2.1.)The Filter may require more frequent cleaning if the NewLife unitoperates in a harsh environment, such as a house heated by wood,kerosene, oil, or one with excessive cooking or cigarette smoke.4.1.2 Product FilterThe product filter is designed to last for the life of the unit. Whether inside theproduct tank or an external component to this tank, there is no required orscheduled replacement needed for this part.Optional Felt Intake Filter Replacement (First Stage Resonator Filter)The optional internal felt filter is required to be changed annually. See below forinstructions for changing the filter. This first stage resonator filter is standard onIntensity 10 units.1. Set the unit’s ON/OFF switch to the OFF position, and unplug the powercord.2. Remove the right side panel to locate the felt intake filter.3. Remove the filter in the unit, and replace with new filter.4. Reconnect side panel.1. Set the ON/OFF power switch to the ON position to test the alarm.2. Reconnect the side panel.