38Performing leak test & insulation5. Select the insulation of the refrigerant pipe.Xf Insulate the gas side and liquid side pipe. Thickness is selected according to pipe size.Xf Indoor temperature of 30 °C (86 °F) and humidity of 85% is the standard condition. If installing in a high humiditycondition, increase insulation by one size by referring to the table below. If installing in unfavorable conditions, usethe thicker size noted.Xf Insulator’s heat-resistance temperature should be more than 120 °C (248 °F).Pipe Pipe sizeInsulation Type (Heating/Cooling)RemarksGeneral[30 °C(86 °F), 85 %]High humidity[30 °C(86 °F), over 85 %]EPDM, NBRmm inch mm inch mm inchLiquid pipe 6.35 ~ 9.52 1/4~3/8 9 3/8 9 3/8Heating resistingtemperature over120°C(248°F)12.7 ~ 50.80 1/2~2 13 1/2 13 1/2Gas pipe6.35 1/4 13 1/2 19 3/49.52 ~ 25.40 3/8~1 19 3/4 25 128.58 ~ 44.45 1 1/8~1 3/4 19 3/4 32 1 1/450.80 2 25 1 38 1 1/2Xf When installing insulation in places and conditions below, use the same insulation that is used for high humidityconditions.- High humidity places such as shoreline, hot spring, near lake or river, and ridge (when the part of the building iscovered by earth and sand.)- Restaurant ceiling, sauna, swimming pool etc.- The ceiling frequently exposed to moisture and cooling is not covered.e.g. The pipe installed at a corridor of a dormitory and studio or near an exit that opens and closes frequently.- When the pipe is installed in high humidity areas due to lack of a ventilation system.