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5-2. Connecting Tubing Between Indoor and RAC Multi Outdoor Units
(1) Tightly connect the indoor-side refrigerant tubing extended from wall with the RAC Multi
Outdoor-side tubing.
Indoor Unit Tubing Connection Unit : mm
Indoor unit type S-M20, 25, 36, 50PY3E S-60PY3E
Gas tube ø12.7 (ø9.52) ø15.88 (ø12.7)
Liquid tube ø6.35 ø9.52 (ø6.35)
When connecting to the CU-XX outdoor unit, joint piping is required because the piping diameter
is different.
The size of parenthesis indicates the connection tube diameter when using the
different-diameter- tube joint.
S-M20, 25, 36, 50PY3E Use Pipe size Reducer (CZ-MA1PA) is separate purchase
S-60PY3E
Different-diameter-tube joint for the indoor unit tubing
connection part is supplied with S-60PY3E.
Liquid and Gas side piping connection diagram.
Indoor Model Multi R32 Model Pipe connection diagram
S-M20PY3E
S-25PY3E
S-36PY3E
CU-2Z35***
CU-2Z41***
CU-2Z50***
CU-3Z52***
CU-3Z68***
CU-4Z68***
CU-4Z80***
CU-5Z90***
S-50PY3E CU-2Z50***
CU-3Z52***
CU-3Z68***
CU-4Z68***
CU-4Z80***
CU-5Z90***
S-60PY3E CU-3Z68***
CU-4Z68***
CU-4Z80***
CU-5Z90***
Liquid tube (ø6.35)
Gas tube (ø9.52)
Connect the Pipe Size Reducer CZ-MA1PA (ø9.52 - ø12.7)
to the gas tubing side indoor unit
Liquid tube (ø6.35)
Gas tube (ø12.7)
Connect the liquid socket tube B (ø6.35 - ø9.52) to
the liquid tubing side indoor unit
Connect the gas socket tube A (ø12,7- ø15.88) to
the gas tubing side indoor unit
01_330918_EU_Eng.indb 84 2021/9/9 11:27:08
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