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Refrigerant pipe installation
f Branch joint (E)
Select a branch joint according to the sum of indoor unit capacity which will be connected after the branch.
❋ However, if the size of the pipe between branch joints (E) is bigger than the size of the pipe connected to the outdoor unit
(D), apply the pipe size (D).
1) Y-joint
Classification Model name Specification [kW (MBH)]
Y-joint (E)
MXJ-YA1509M 15.0 kW (51.2 MBH) and below
MXJ-YA2512M Over 15.1 kW ~ 40.0 kW (51.3 ~ 135.2 MBH) and below
MXJ-YA2812M Over 40.1 kW ~ 45.0 kW (135.3 ~ 153.5 MBH) and below
MXJ-YA2815M Over 45.1 kW ~ 70.3 kW (153.6 ~ 239.9 MBH) and below
MXJ-YA3419M Over 70.4 kW ~ 98.4 kW (240.0 ~ 335.8 MBH) and below
MXJ-YA4119M Over 98.5 kW ~ 135.2 kW (335.9 ~ 461.3 MBH) and below
MXJ-YA4422M Over 135.2 kW (461.3 MBH)
2) Distribution header
Classification Model name Specification [kW (MBH)]
Distribution header (E)
MXJ-HA2512M 45.0 kW (153.5 MBH) and below (for 4 rooms)
MXJ-HA3115M 70.3 kW (239.9 MBH) and below (for 8 rooms)
MXJ-HA3819M
Over 70.4 kW ~ 135.2 kW (240.0 ~ 461.3 MBH) and below
(for 8 rooms)
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