Heat Pump / Cooling Only 50Hz (RX(Y)Q5~54P) SiEN34-705
248 Installation Manual
1.9 Pipe Insulation
! Insulation of pipes should be done after performing “1-8 Air Tight Test and Vacuum
Drying”.
! Always insulate the liquid side piping and gas side piping in the interunit piping and
refrigerant branching kit. Failing to insulate the pipes could cause leaking or burns. (The gas
side piping can reach temperatures of 120°C. Be sure the insulation used can withstand
such temperatures.)
! Reinforce the insulation on the refrigerant piping according to the installation environment.
Condensation might form on the surface of the insulation.
$ Ambient temperature: 30°C, humidity: 75% to 80% RH: min. thickness: 15 mm.
$ If the ambient temperature exceeds 30°C and the humidity 80% RH, then the min.
thickness is 20 mm.
! If there is a possibility that condensation on the shutoff valve might drip down into the indoor
unit through gaps in the insulation and piping because the outdoor unit is located higher than
the indoor unit, etc., this must be prevented by caulking the connections, etc. (Refer to
figure 29)
! The piping lead-out hole lid should be attached after opening a knock hole. (Refer to figure
30)
! If small animals and the like might enter the unit through the piping lead-out hole, close the
hole with blocking material (procured on site) after completion of “1-11. Additional
Refrigerant Charge and Check Operation”. (Refer to figure 30)
Note: ! After knocking out the holes, we recommend you remove burrs in the knock holes (see
figure 30) and paint the edges and areas around the edges using the repair paint.
figure 29
Liquid side shutoff valve
Gas side shutoff valve
Indoor interunit piping
Insulation material
Coking, etc.
Refrigerant charge port
Block “ ”.
figure 30
Piping lead-out hole lid
Liquid side piping
Gas side piping
Open a knock
hole at “ ”.
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