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Design & installation Guide For McQuay MDS Multi System
The following tables show the refrigerant copper pipe dimension specifications.
8.0HP
12.0HP
15.0HP/18.0HP 22.0HP 26.0HP/28.0HP
Specification 10.0HP 20.0HP 24.0HP 30.0HP
Between the outdoor unit and the first tap joint
Liquid pipe
φ12.7mmxt1.0 φ15.88mmxt1.2 φ15.88mmxt1.2 φ19.05mmxt1.2 φ 19.05mmxt1.2
Gas pipe
φ28.6mmxt1.2 φ28.6mmxt1.2 φ34.9mmxt1.4 φ 38.1mm xt1.6 φ41.3mmxt1.6
Between the tap joints
<15kW φ 9.52mm x t0.8
15kW~22.5kW
φ12.70mm x t1.0
22.5kW~50kW
φ12.77mm x t1.0
φ15.88mm x t1.2
50kW~85kW - - - φ 19.05mm x t1.2
<9.0kW φ 15.88mm x t1.2
9.0kW~15kW φ 19.05mm x t1.2
15kW~21kW φ 25.40mm x t1.2
21kW~31kW φ 28.06mm x t1.2
31kW~39kW - - φ31.75mm x t1.4
39kW~50kW - - φ 34.9mm x t1.4
50kW~69kW - - - φ38.1mm x t1.6
69kW~85kW - - - - φ 41.3mm x t1.6
Between the tap joint and the indoor unit
The indoor unit to which the pipe is connected. Consistent to the indoor unit port
The indoor unit to which the pipe is connected. Consistent to the indoor unit port
Specification
3.0HP 4.0HP/5.0HP 6.0HP
Between the outdoor unit and the first tap joint
Liquid pipe φ9.52mmxt0.8 φ 9.52mmxt0.8 φ 9.52mmxt0.8
Gas pipe φ 15.88mmxt1.2 φ 19.05mmxt1.2 φ 19.05mmxt1.2
Between the tap joints
<16kW φ 9.52mm x t0.8
16kW~22.5kW - - -
>22.5kW - - -
<9.0kW φ 15.88mm x t1.0
9.0kW~16kW φ 19.05mm x t1.2
16kW~21kW - - -
>21kW - - -
Between the tap joint and the indoor unit
<4kW φ 6.35mm x t0.7
≥ 4kW φ 9.52mm x t0.8
<2.8kW φ 9.52mm x t0.8
2.8kW~4.5kW φ 12.70mm x t1.0
4.5kW~8kW φ15.88mm x t1.2
>8kW φ 19.05mm x t1.2
For MDS-A series
For MDS-B series
Outdoor unit capacit
Liquid
pipe
Gas
pipe
Total capacity of
the indoor unit to
which the pipe is
connected.
Total capacity of the
indoor unit to which the
pipe is connected.
Liquid
pipe
Gas
pipe
Total capacity of
the indoor unit to
which the pipe is
connected.
Total capacity of
the indoor unit to
which the pipe is
connected.
Liquid pipe
Total capacity
of the indoor
unit to which
the pipe is
connected.
Total capacity of
the indoor unit to
which the pipe is
connected.
Outdoor unit capacit
Liquid
pipe
Gas
pipe
Gas pipe
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