Kaisai 12K Installation Manual

Contents

Kaisai 12K Installation Manual Manual pdf 10 page image

3 INSTALL THE REFRIGERANT PIPEExecute heat insulation work completely on both sides of thegas piping and liquid piping. Otherwise, this can sometimesresult in water leakage.(When using a heat pump, the temperature of the gas piping canreach up to approximately 120 . Use insulation which issufficiently resistant.)Before rigging tubes, check which type of refrigerant is used.All field piping must be provided by a licensed refrigerationtechnician and must comply with the relevant local andnational codes.Use a pipe cutter and flare suitable for used refrigerant.Do not mix anything other than the specified refrigerant, suchas air, etc.., Inside the refrigerant circuit.Coat the flare both inside and ouside with ether oil or ester oil .If the refrigerant gas leaks during the work, ventilate the area.A toxic gas is emitted by the refrigerant gas being exposed toa fire.Make sure there is no refrigerant gas leak. A toxic gas may bereleased by the refrigerant gas leaking indoor and beingexposed to flames from an area heater, cooking stove, etc.8Also, in cases where the temperature and humidity of therefrigerant piping sections might exceed 30 or Rh80%,reinforce the refrigerant insulation(20mm or thicker).Condensation may form on the surface of the insulating material.Only use annealed material for flare conncetions.Coat here with ether oil or ester oilPrecautions3.1 Flaring the pipe end1) Cut the pipe end with a pipe cutter.2) Remove burrs with the cut surface facing downward so that thechips do not enter the pipe.5) Check that the flaring is properly made.Refer to the table below for the dimensions of flare nuts spacesand the appropriate tightening torque. (Overtightening maydamage the flare and cause leaks.)Pipe gauge(mm)Outer diam.(mm)Tightening torqueA(mm)Max.1.31.61.82.2Min.0.71.01.02.0Flare dimensionA (mm) Flare shapeO6.35O6.3515~16 N. m(153~163 kgf.cm) 8.3~8.712.0~12.415.4~15.818.6~19.025~26 N. m(255~265 kgf.cm)35~36 N. m(357~367 kgf.cm)45~47 N. m(459~480 kgf.cm)O9.52O9.52O12.7O12.7O15.9O15.9R0.4~0.845 290 4Aoo1 Torque wrench2 Flare nut3 Piping union4 Spanner1 2 3 4Align the centres of both flares and tighten the flare nuts 3 or 4turns by hand. Then tighten them fully with the torque wrenches.3.2 Refrigerant pipingCheck whether the height drop between the indoor unit andoutdoor unit, and the length of refrigerant pipe meet the followingrequirements:CapacityBtu/h( )The type of models Max.allowablepiping length25m50m<15000R410A inverterSplit type airconditionerMax.allowablepiping height10m25m30m65m>15000~<24000>24000~<36000>36000~<6000020m30mCut exactly atright angles. Remove burrs.Flare's inner surfacemust be flaw-freeThe pipe end mustbe evenly flared in aperfect circle.Make sure that theflare nut is fitted.3) Put the flare nut on the pipe.4) Flare the pipe.DieCopper pipeASet exactly at the position shown below.10 kaisai.com