Pipe Selection; Twinning Kit Selection - Mitsubishi Electric City Multi PURY-P72TNU-A-BS Manuel D'installation

9-2. Pipe selection

Use refrigerant piping made of phosphorus deoxidized copper (copper and copper alloy seamless pipes) that
meets local requirements. Pipe joints should also meet local requirements. Keep the inner and outer surfaces
of the pipes clean and free of sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other
contaminants.
- Contaminants on the inside of the refrigerant piping will cause the refrigerant oil to deteriorate and cause the
compressor to malfunction.
Use refrigerant pipes for use with R410A refrigerant system. Piping for systems for use with other types of refrigerants may not be able to be used.
Use refrigerant pipes with the thicknesses specified in the table below.
Size [mm (in)] Minimum wall thickness [mm (in)]
ø6.35 (ø1/4)
ø9.52 (ø3/8)
ø12.7 (ø1/2)
ø15.88 (ø5/8)
ø19.05 (ø3/4)
ø22.2 (ø7/8)
ø25.4 (ø1)
ø28.58 (ø1-1/8)
ø31.75 (ø1-1/4)
ø34.93 (ø1-3/8)
ø41.28 (ø1-5/8)

9-3. Twinning kit selection

Select appropriate twinning kits (sold separately), referring to the sections below.
* Use an adapter, if necessary, to connect a refrigerant pipe to a twinning pipe of a different diameter.
9-3-1. 2-Branch Joint Pipe
A 2-Branch Joint Pipe is used to connect multiple indoor units to a port.
(1) R2 system
Total capacity of downstream indoor units
72 or below
73 to 96
9-3-2. Joint Pipe Kit
A Joint Pipe Kit is used to connect an indoor unit of P72 model or above.
Indoor unit model
P72 to P96
* When connecting P72 through P96 models of indoor units to two ports, set the dipswitch SW4-6 on the BC controller to ON.
9-3-3. Outdoor unit twinning kit
Outdoor unit twinning kit is used to combine multiple outdoor units.
Total capacity of outdoor units
P192 to 240T/YSNU, EP192 to 240 T/YSNU
P264 to 336T/YSNU, EP264 to 432 T/YSNU
WT09106X03
0.67 (0.0265)
0.72 (0.0285)
0.72 (0.0285)
0.8 (0.0315)
0.98 (0.0385)
1.04 (0.0410)
1.17 (0.0460)
1.17 (0.0460)
1.28 (0.0505)
1.28 (0.0505)
1.41 (0.0555)
Kit model
CMY-Y102SS-G2
CMY-Y102LS-G2
Kit model
CMY-R160-J1
Kit model
CMY-R200NCBK
CMY-R300NCBK
GB-18