Indoor unitTwo ways for the installation of indoor part, as illustrated:Way One : When the pipes go from the back of the indoor unit, you can connect the fresh air tube with the outlet jointon the two sides of the frame,and then fix it at the pipe exit of the frameWay Two : When installing the side outlet pipe,connect the fresh tube and the outlet joint ,and then fix it on the left sideor right side of the frame.Outlet pipe is connected with the pipe hole cover by the pipe lid.5.Installation instruction on the indoor part of the fresh air device(optional)1. 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)2.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)Installation way One Installation way TwoSee the Installation from the fresh air sets for the installation of outdoor unit.Freshair-3Freshair-2Lid for right pipingLid for left pipingChange-for-fresh-air tubeDrain hoseFix with adhesive tapeOutlet jointFresh air tubeOutlet joint(in guard ring)Guard ringTo indoor unitTo outdoor fresh air motorThe connecting method offresh air box signal wireFor the units withfresh air functionclaw of the clipFigure 1Figure 2Figure 3DaffYEL/GRNREDBLK WHTBRN WHTBLKREDYEL/GRN BRNYEL/GRNBLK WHTWHTBLKYEL/GRN1(L) 2(N)HSU-09H03/U(ZXF)HSU-12H03/U(ZXF)HSU-09C03/U(ZXF)HSU-12C03/U(ZXF)