Johnson Controls YVAHP072B31S, Service Manual

Page: 842 / 1796

Allow adequate space for elbow, angled, and irregular piping arrangements to compensate for
expansion and contraction brought on by temperature change.
4. Installation Work
4.1 Piping Connection Size
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with the pipe size.
Model
Branch Pipe for
High/Low Pressure Gas Line
Branch Pipe for
Liquid Line
Reducer for
High/Low Pressure Gas Line
Reducer for
Liquid Line
MC-NP21A1
(To Outdoor Unit)
(To Indoor Unit)
ID 1-1/4
ID 1-1/2
ID 1-1/8
ID 1-1/4
ID 1-1/4
ID 1
ID 5/8
ID 3/4
ID 3/8
ID 1/2
ID 5/8
ID 3/4
ID 7/8
ID 3/4
(To Outdoor Unit)
(To Indoor Unit)
OD 1-1/4
ID 1-1/8
ID 1
ID 1/2
ID 5/8
OD 3/4
ID 3/8
ID 1-1/8
ID 1
OD 1-1/4
OD 1-1/4
ID 1-1/8
OD 1-1/2
ID 1-3/8
MC-NP30A1
Piping Connection Kit 1
ID 1-1/2
ID 1-1/4
ID 1-1/4
ID 1-1/8
ID 1
ID 1-1/4
(To Outdoor Unit)
(To Piping Connection Kit 2)
(To Indoor Unit)
ID 5/8
ID 3/4
ID 5/8
ID 3/4
ID 7/8
ID 3/4
ID 1/2
ID 3/8
(To Outdoor Unit)
(To Indoor Unit)
(To Piping Connection Kit 2)
OD 1-1/4
ID 1-1/8
ID 1
ID 1/2
ID 5/8
OD 3/4
ID 3/8
ID 1-1/8 ID 1-1/4
OD 1-1/4
OD 1 ID 3/4
ID 7/8
OD 1-1/4
ID 1-3/8
OD 1-1/2
ID 1-5/8
Piping Connection Kit 2
ID 1-1/2
ID 1-1/4
ID 1-1/4
ID 1-1/8
ID 1
ID 1-1/4
(To Outdoor Unit)
(To Piping Connection Kit 1)
ID 1/2
ID 3/8
ID 3/4
ID 5/8
ID 3/4
ID 7/8
ID 3/4
ID 5/8
(To Outdoor Unit)
(To Piping Connection Kit 1)
OD 1-1/4
ID 1-1/8
ID 1
ID 1/2
ID 5/8
OD 3/4
ID 3/8
ID 1-1/8
ID 1
OD 1-1/4
ID 1-3/8 OD 1-1/4 ID 1-1/4
OD 1-1/4
ID 1-1/8
ID 7/8
OD 1
ID 3/4
Unit: inch, ID: Inner Diameter, OD: Outer Diameter
( ): When installing the “Branch Pipe for High/Low Pressure Gas Line” for “Piping Connection Kit 2”, install “Long
Reducer” at “To Piping Connection Kit 1” side of “Piping Connection Kit 2”. Otherwise, it could result in
abnormal oil distribution between each of the outdoor units.
(Qty. 2)
(Qty. 2)
( )
( )
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INSTALLATION