Indoor unitTwo ways for the installation of indoor part, as illustrated:Way One (right direction): Take off the lid for right piping pipe,put the Outlet joint into the lid,then put the fresh air tubeinto the outlet jont.Way Two (left direction): Take off the lid for leftt piping pipe,put the Outlet joint into the lid,then put the fresh air tubeinto the outlet jont.5.Installation instruction on the indoor part of the fresh air deviceTo indoor unitTo outdoor fresh air motorThe connecting method offresh air box signal wireOutdoor unitSignal line: 22AWGx21. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarqualified person. The type of connecting wire is H05RN-F or H07RN-F.2. If the fuse on PC board is broken please change it with the type of T. 3.15A/250V.3. The wiring method should be in line with the local wiring standard.4. After installation, the power plug should be easily reached.56.Easily-demount cleaning of indoor unit1.Top inlet can be taken downOpen the inlet grille, press the claw of the clip on the unit,thentake down the top inlet.(according to figure 1)claw of the clipFigure 1Figure 2Figure 32.Vertical flap can be taken downOverturn the vertical flap, press the claw of the clip ,then takedown vertical flap.(according to figure 2)3.Horizontal louvers can be taken downAfter taking down vertical flap.Horizontal louvers are appeared,drawthe middle louver,and take down the horizontal louvers .(according to figure 3)Figure 2DaffFor the units withfresh air functionLid for left pipingFix with adhesive tapeLid for under pipingOutlet jointDrain hoseChange for fresh air tubeIndoor unitConnecting wiring :Power cable3G1.5mm 2 +1x0.75mm 23G1.5mm 2: