Panasonic CS-VZ9SKE Service Manual

Also see for CS-VZ12SKE: Operating instructions Operating instructions

Contents

Panasonic CS-VZ9SKE Service Manual Manual pdf 48 page image

4813.5 Piping installation of R3213.5.1 Pipe materials used and flaringCopper pipes are used for refrigerant piping. Pipeswhich comply with JIS Regulations need to be used.Room air conditioners which use R410A and R32have higher pressure; thus, using pipes which complywith the Regulations is important.The pipe thickness is regulated by revised JIS B 8607“Flaring and brazing fittings for refrigerant” and thepipe thickness for R410A, R32 is shown in the table.Pipe thicknessO and OL materials Thickness (mm)Diameter Diameter(mm) R410A R32 R221/4 6.35 0.803/8 9.52 0.801/2 12.70 0.805/8 15.88 1.00Caution For connection piping, use copper phosphate seamless pipes (1220T) as regulated in “JIS H 3300” and the pipethickness is 0.8 mm. In the market, there are some pipes of 0.7 mm thickness, but do not use these pipes (0.8 mm thickness has to bestrictly followed). It is recommended to use pipes whose adhesion amount of oil is at or less than 40 mg / 10 m.At the same time, do not use pipes with dent, de-shape, and color change (especially inside).13.5.2 Processing and connection of pipesFor refrigerant pipe installation, be aware of moisture and dirt do not get into the pipes, and make sure of norefrigerant leakage.◎ The procedure of flaring and precautionsa) Cutting of pipes：use pipe cutter and cut the pipe slowly not to de-shape the pipe.b) Removal of burrs on the edge of pipe (reamer or scraper)If the condition of pipe edge after the deburring is no good or if burrs attaches on the flaring, it may causerefrigerant leakage. Turn the pipe end down and perform deburring carefully.c) Insert the flare nut (use the nut which is a part of the CZ parts)d) FlaringEnsure the cleanliness of clump bar and pipe, and perform flaring carefully.Use the existing flare tools or flare tools for R410A. Be aware that the sizes and dimensions of flaring is differentin each flaring tool. If you use the existing flaring tools, use flaring gauge to measure the length of the flaring part.Pipingsize(mm)Dimensions “a” (mm)R22Dimensions “a” (mm)R410A/R32aBarNut outer diameter (mm)Flare tools Flare toolsfor R410A Flare tools Flare toolsfor R410A R22R410AClutch type Wing nuttype Clutch type Clutch type Wing nuttype Clutch type R326.35 (1/4") 0.5 ~ 1.0 1.0 ~ 1.5 0 ~ 0.5 1.0 ~ 1.5 1.5 ~ 2.0 0 ~ 0.5 17 179.52 (3/8") 0.5 ~ 1.0 1.0 ~ 1.5 0 ~ 0.5 1.0 ~ 1.5 1.5 ~ 2.0 0 ~ 0.5 22 2212.70 (1/2") 0.5 ~ 1.0 1.5 ~ 2.0 0 ~ 0.5 1.0 ~ 1.5 2.0 ~ 2.5 0 ~ 0.5 24 2615.88 (5/8") 0.5 ~ 1.0 1.5 ~ 2.0 0 ~ 0.5 1.0 ~ 1.5 2.0 ~ 2.5 0 ~ 0.5 27 29