Daikin FTS20JEV1K Installation Manual

Contents

English7Indoor unitOutdoor UnitAllowable Piping LengthIf the pipe is too long, both the capacity and reliability of the unit will drop. As the number of bends increases, resistance tothe flow of refrigerant system increases, thus lowering cooling capacity. As a result, the compressor may become defective.Always choose the shortest path and follow the recommendations as tabulated below:REFRIGERANT PIPINGModel FTS20JEV1K FTS25JEV1KMin. Allowable Length (L), m 3Max. Allowable Length (L), m 35Max. Allowable Elevation (E), m 15Gas Pipe Size, mm /(in) 12.70 (1/2") 15.88 (5/8")Liquid Pipe Size, mm /(in) 6.35(1/4")L ERemark: The refrigerant pre-charged in the outdoor unit is for piping length up to 7.5m.*Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance.Additional refrigerant charge [g] per additional 1m length as tabulatedAdditional ChargeThe refrigerant is pre-charged in the outdoor unit. If the piping length is less than 7.5m, then additional charge after vacuumingis not necessary. If the piping length is more than 7.5m, then use the additional charge value as indicated in the table.Indoor FTS20JEV1K FTS25JEV1KOutdoor RS20JEV1K RS25JEV1KAdditional charge [g/m] 14 24Example:FTS25JEV1K & RS25JEV1K with 12m piping length, additional piping length is 4.5m. Thus,Additional charge = 4.5[m] x 24[g/m]= 108[g]