Hitachi FSG Series, Технический каталог

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REFRIGERANT PIPING AND REFRIGERANT CHARGE
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13 REFRIGERANT PIPING AND REFRIGERANT CHARGE
CONTENTS
13 REFRIGERANT PIPING AND REFRIGERANT CHARGE __________________________ 1
13.1. Refrigerant Piping Selection _________________________________________________ 2
13.1.1. Refrigerant Piping Work Range _______________________________________________ 2
13.1.2. Refrigerant Piping Length____________________________________________________ 4
13.1.3. Piping Size and Multi-Kit FSG/FSG1 ___________________________________________ 7
13.1.4. Piping Size and Distributor FXG/FXG1 _________________________________________ 8
13.2. Distributor Line Branch and Header Branch ____________________________________ 10
13.2.1. Dimensional Data _________________________________________________________ 10
13.2.2. Distribution Method________________________________________________________ 17
13.3. Piping Work Connection Considerations _______________________________________ 19
13.3.1. Piping Materials __________________________________________________________ 19
13.3.2. Three Principles on Refrigerant Piping Work ____________________________________ 21
13.3.3. Suspension of Refrigerant Piping _____________________________________________ 22
13.3.4. Tightening Torque ________________________________________________________ 22
13.3.5. Brazing Work ____________________________________________________________ 23
13.4. Indoor Unit Piping Work Connection __________________________________________ 24
13.4.1. RCI – 4 Way Cassette Type _________________________________________________ 24
13.4.2. RCD – 2 Way Cassette Type ________________________________________________ 24
13.4.3. RPC – Ceiling Type _______________________________________________________ 24
13.4.4. RPI – In-the-Ceiling Type ___________________________________________________ 25
13.4.5. RPK – Wall Type _________________________________________________________ 26
13.4.6. RPF & RPFI – Floor Type & Floor Concealed Type_______________________________ 27
13.4.7. CH Unit _________________________________________________________________ 27
13.5. Outdoor Unit Piping Work Connection_________________________________________ 28
13.5.1. Factory Supplied Pipe Accessories ___________________________________________ 28
13.5.2. Position of Piping Connection________________________________________________ 28
13.5.3. Flange Piping Connection __________________________________________________ 30
13.5.4. Piping Connection ________________________________________________________ 31
13.5.5. Installing Dryer in Liquid Line ________________________________________________ 32
13.6. Refrigerant Charging Quantity_______________________________________________ 34
13.6.1. Guide of Additional Refrigerant Charge Calculation (R407C) _______________________ 34
13.6.2. Samples ________________________________________________________________ 36
13.7. Vacuum and Refrigerant Charge_____________________________________________ 46
13.8. Caution on Refrigerant Leakage _____________________________________________ 47
13.8.1. Maximum Permissible Concentration of HCFC Gas ______________________________ 47
13.8.2. Calculation of Refrigerant Concentration _______________________________________ 47
13.8.3. Countermeasure for Refrigerant Leakage According to KHK Standard________________ 47