Design
Contents
1.System design
(1)Procedure for selecting model type and calculating performance .......................................... D-2
(2)Calculation of actual performance ......................................................................................... D-3
2. Operating temperature ranges for heating and cooling ................................................................ D-5
3.Refrigerant piping design
(1)Selection of refrigerant piping ............................................................................................... D-6
(2)Selecting branch piping sizes ............................................................................................... D-7
(3)Selection of branch piping and header piping ........................................................................ D-8
(4)Effective length of refrigerant piping ...................................................................................... D-9
(5)Calculation of additional charge quantity of refrigerant ........................................................ D-10
(6)Checking the density limit ................................................................................................... D-11
(7)Subsequent Expansion ...................................................................................................... D-13
4. Capability change rate due to refrigerant pipe length ................................................................. D-14
5.Criteria for positioning outdoor unit
(1)Combined installation criteria .............................................................................................. D-15
(2)Verandah installation criterion ............................................................................................. D-21
6.Sound-proofing measure
(1)Installation location and sound-proofing measures .............................................................. D-23
(2)Attenuation of sound through dstance ................................................................................. D-23
(3)Sound level attenuation through a noise barrier .................................................................. D-24
(4)Additional sound from reflection .......................................................................................... D-25
(5)Combining sounds ............................................................................................................. D-25
(6)Converting to overall A characteristics from octave band levels ........................................... D-26
(7)Designing sound-proofing countermeasures ....................................................................... D-26
(8)Sound-proofing calculation sheet (example) ....................................................................... D-27
7.Position of center of gravity and earthquake resistant design
(1)Earthquake resistance calculations ..................................................................................... D-28
(2)Method of verifying the strength of foundation bolts during an earthquake ........................... D-28
(3)Installed position and position of the center of gravity .......................................................... D-37
(4)Example anchor bolt calculation ......................................................................................... D-38
8.Salt resistant specification
(1)Precautions regarding installation ....................................................................................... D-42
(2)Outdoor unit salt resistant specification surface treatment list .............................................. D-43
D- 1
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