12Installation ProcedureEnglishInstallation Procedure5 Select the insulation of the refrigerant pipe.• Insulate the gas side and liquid side pipe, noting theinsulation thickness that must differ according tothe pipe size.• Standard: Less than an indoor temperature of 30°C,with humidity at 85%. If installing in a high humidityenvironment, use one grade thicker insulator byreferring to the table below. If installing in anunfavourable environment, use thicker one.• The heat-resistance temperature of the insulatormust be more than 120°C.Pipe Pipe size(mm)Insulation Type(Heating/Cooling)RemarksStandard[30°C,85%]Highhumidity[30°C, over85%]EPDM, NBRLiquidpipeØ6.35 toØ9.52 9t ॱInternaltemperatureis higher than120°CØ12.7 toØ50.80 13t ॱGaspipeØ6.35 13t 19tØ9.52 toØ25.40 19t25tØ28.58 toØ44.45 32tØ50.80 25t 38t• When installing insulation in the places andconditions below, use the same insulation that isused for high humidity conditions.High humidity locations such as shorelines, hot springs, lakeor riversides, and ridges (when part of the building is coveredby earth and sand)Restaurant ceiling, sauna, swimming pool etc.Ceilings frequently exposed to moisture and cooling arenot covered. For example, pipes installed at a corridor of adormitory and studio or near an exit that opens and closesfrequently.Places (where the pipes are installed) that are highly humiddue to a lack of ventilation.• Refrigerant pipe before EEV kit and MCU or withoutEEV kit and MCU ࣞYou can contact the gas side and liquid sidepipes but the pipes should not be pressed. ࣞWhen contacting the gas side and liquid sidepipe, use 1 grade thicker insulator.• Refrigerant pipe after EEV kit and MCU ࣞInstall the gas side and liquid side pipes, leave10mm of space. ࣞWhen contacting the gas side and liquid side pipe,use 1 grade thicker insulator.Step 10 Installing the drain hose anddrain pipe1 Fix the flexible hose to the drain pipe.• The connection port of the flexible hose and PVC drainpipe must be fixed with PVC adhesives.Check out that the connected part doesn’t leak.Drain hose PVC Tube Joint+ VP25 (OD: 32 mm, ID: 25 mm)VP 20 (Drain pipe)(OD: 26mm, ID: 20mm)2 Connect the flexible hose to the drain hose port.• Make sure that a rubber ring is installed on the drainhose port.• The drain hose port location differs depending on theunit types.Drain hose port