NoteThe "Parts Replaced on a Regular Basis" described on page 26 must be replaced on a regular basisto ensure and maintain safety and performance. Any part that is outside the designated replacementperiod must be replaced even if there is no problem during use. Our company will not assumeresponsibility for any harm, damage, or defects attributed to the fact that a part was not replacedwithin the designated period.4 Close the hot water and water stop valves.CautionTo prevent water leakage, always checkthat the stop valves are completely closedbefore cleaning or draining the water fromthe strainer.216 After checking that the strainers have been fastened properly,open the stop valves.Check that there are no water leaks from the check valve.7 Mount the maintenance cover onto the main unit.The maintenance cover can be mounted by hooking thethree latches on the main unit. First, hook the top latch andthen hook the bottom two latches.CautionCheck that the maintenance cover is properlysecured with the three latches. If not, watermay penetrate the main unit resulting insystem failure.5 Clean the strainer.When the strainer is detached, the water in the pipe will comeout. Therefore, rotate and detach the strainers of the checkvalves for hot water and water, while catching the water in acontainer. After completely draining the water from the checkvalve, clean the strainer by removing dust and dirt, set it inthe original position, and tighten firmly.(Tool required: a blade-head screwdriver)Cautionz Removing the strainer from the hot watersupply pipe may cause hot water to spill out.Take extra care when draining the hot water.z The drain nut and strainer should betightened firmly. If they are not, there is apossibility of water leaks.z If the drain water spills onto the floor,immediately wipe it up.Check ValveStrainerStop CockDetachAttachLoosenTightenOpenLatchLatchLatchClose