25CARE AND MAINTENANCECASSETTE TYPE2. Take out the air-in grill (together with the air filter shownoin Fig. B). Pull the air-in grill down at 45 and lift it upto take out the grill.3. Dismantle the air filter4. Clean the air filter(Vacuum cleaner or pure water maybe used to clean the air filter. If the dust accumulationis too heavy , please use soft brush and mild detergentto clean it and dry out in cool place) .Fig. AFig.B1. Open the air-in grillPush the grill switches towards the middle simultaneouslyas indicated in Fig. A. Then pull down the air-in grill.Cautions: The control box cables ,which are originallyconnected with the main body electrical terminators must bepulled off before doing as indicated above.DUCT AND CEILING TYPE2. Take out the air-in grill.3. Dismantle the air filter4. Clean the air filter (Vacuum cleaner or pure water maybe used to clean the air filter. If the dust accumulationis too heavy , please use soft brush and mild detergentto clean it and dry out in cool place) .1. Open the air-in grillPush the grill switches towards the middle simultaneouslyas indicated in follow figure sketch. Then pull down theair-in grill.Cautions: The control box cables ,which are originallyconnected with the main body electrical terminatorsmust be pulled off before doing as indicated above.Fig. CFig. DThe air-in side should face up when using vacuumcleaner. (See Fig. C)The air-in side should face down when using water.(See Fig. D)Cautions : Do not dry out the air filter under directsunshine or with fire.5. Re-install the air filter6. Install and close the air-in grill in the reverse order ofstep 1 and 2 and connect the control box cables to thecorresponding terminators of the main body .Note: High-static Pressure Parvis Split Type has noair filter.