Samsung MXJ-YA1509 Series, Installation Manual, Page: 57 / 137

Installation guide Installation guide
57 57
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Important points Important points
① ① The thickness of the thermal insulation material must be determined in the light of the pipe The thickness of the thermal insulation material must be determined in the light of the pipe
sizes. Pipe size in. (mm) Thickness of insulation material sizes. Pipe size in. (mm) Thickness of insulation material
Pipe Pipe size size in(mm) in(mm) Thickness Thickness of of insulation insulation material material
1/4~ 1/4~   1 1 (6.4mm~25.4m (6.4mm~25.4mm) m) 1/2 1/2 or or more more (12.5mm (12.5mm or or more) more)
② ② It will be necessary to increase the values in the above table for top floors or where conditions It will be necessary to increase the values in the above table for top floors or where conditions
are hot and humid. (Refer
are hot and humid. (Refer to Installation manual "6-5 Pipe insulation" for more detail to Installation manual "6-5 Pipe insulation" for more detail))
③ ③ Where a customer supplies his own specifications then these must be adhered to. Where a customer supplies his own specifications then these must be adhered to.
④ ④ Where it is anticipated that the air conditioning unit will be operated at external air Where it is anticipated that the air conditioning unit will be operated at external air
temperatures of 10°C or less then thermal insulation will also be required for the liquid pipes.
temperatures of 10°C or less then thermal insulation will also be required for the liquid pipes.
Heat Recovery Heat Recovery
Series Series
Suction, Discharge Gas piping, liquid piping must be insulated. Suction, Discharge Gas piping, liquid piping must be insulated.
Example of thermal insulation work.
Example of thermal insulation work.
3 3 piping piping section section (between outdoor (between outdoor unit unit and and MCU MCU unit) unit) 2 2 piping piping section section (between (between MCU MCU unit unit and and indoor indoor unit) unit)
If you think that the humidity around the cooling piping might exceed 86°F If you think that the humidity around the cooling piping might exceed 86°F
and RH80%, reinforce the insulation on the cooling piping (at least 13/16" and RH80%, reinforce the insulation on the cooling piping (at least 13/16"
thick). Condensation might form on the surface of the insula
thick). Condensation might form on the surface of the insulation. tion.
2) Insulating the refrigerant pipe 2) Insulating the refrigerant pipe
(1) Insulating the refrigerant (1) Insulating the refrigerant
You must check if there is a gas leak before completing all the installation process. You must check if there is a gas leak before completing all the installation process.
Use EPDM insulation which meets Use EPDM insulation which meets the following condition. the following condition.
Item Item Unit Unit Standard Standard
Density g/cm Density g/cm
3 3
0.048~0.096 0.048~0.096
Dimension Dimension change change route route by by heat heat % % -5 -5 or or less less
Water Water absorption absorption rate rate g/cm g/cm
3 3
0.005 0.005 or or less less
Thermal conductivity Thermal conductivity kcal/m·h·˚C kcal/m·h·˚C 0.032 or less 0.032 or less
Moisture Moisture transpiration transpiration factor factor ng/(m²·s·Pa) ng/(m²·s·Pa) 15 15 or or less less
Moisture Moisture transpiration transpiration grade grade g/(m²·24h) g/(m²·24h) 15 15 or or less less
Formaldehyde Formaldehyde dispersion dispersion mg/L mg/L --
Oxygen Oxygen rate rate % % 25 25 or or less less