Haier 3U19FS1ERA Service Manual - Page 70

>_]]VbTZR\ _^UZdZ_^Vb Pipe and insulation material Pipe Insulation Rigid PVC pipe VP31.5mm (internal diameter) Foamed PE with thickness above 7mm Hose Drain pipe size: ? 19.05mm2 (3/4") PVC pipe. The hose is used for adjusting the off-center and angle of the rigid PVC pipe. Directly stretch the hose to install without making any deformation. The soft end of the hose must be fastened with a hose clamp. Please apply the hose on horizontal part Hose Insulation treatment: Wrap the hose and its clamp until to the indoor unit without any clearance with insulating material, as shown in the figure. Subsidiary insulation Hose clamp Insulation Rigid PVC pipe Drain confirmation During trial run, check that there is no leakage at the pipe connection part during water draining even in winter. Allowable pipe length and drop These parameters differ according to the outdoor unit. See the instruction manual attached with the outdoor unit for details. Supplementary refrigerant The refrigerant supplementation shall be as specified in the installation instructions attached with the outdoor unit. The added refrigerant shall be R410a. The adding procedure shall be aided with a measuring meter for a specified amount of supplemented refrigerant Requirement Overfilling or underfilling of refrigerant will cause compressor fault. The amount of the added refrigerant shall be as specified in the instructions. Pipe cutting and expanding If the pipe is too long or the flare is damaged, it needs to be cut or expanded. 1. Pipe cutting 2. Removing burrs 3.Insertion nut 4. Pipe expansion -69-