Mitsubishi Electric CITY MULTI PURY-HP-TNU-A1 Manuel D'installation page 21

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)] Radial thickness [mm (mil)]
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.
* The maximum number of connectable ports is 48.
9-3-1. 2-Branch Joint Pipe
A 2-Branch Joint Pipe is used to connect multiple indoor units to a port, or to connect two sub BC controllers.
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 P100 model or above.
Indoor unit model
P72 to P96
9-3-3. Outdoor unit twinning kit
Outdoor unit twinning kit is used to combine multiple outdoor units.
Total capacity of outdoor units
HP144T/YSNU
HP192 to HP240T/YSNU
9-4. Pipe connection example
9-4-1. Example of pipe connection between outdoor units
Ⓐ
Ⓑ
WT10508X02
Type
0.8 (32) Type-O
0.8 (32) Type-O
0.8 (32) Type-O
1.0 (40) Type-O
1.2 (48) Type-O
1.0 (40) Type-1/2H or H
1.0 (40) Type-1/2H or H
1.0 (40) Type-1/2H or H
1.0 (40) Type-1/2H or H
1.1 (44) Type-1/2H or H
1.2 (48) Type-1/2H or H
1.4 (56) Type-1/2H or H
Kit model
CMY-Y102SS-G2
CMY-Y102LS-G2
Kit model
CMY-R160-J1
Kit model
CMY-R100NCBK
CMY-R200NCBK
Ⓑ
Ⓐ
Ⓒ
Ⓒ
On-site piping
Ⓐ
Ⓑ Twinning Kit
Ⓒ The pipe section before the twinning pipe must
have at least 500 mm (19-11/16 in) of straight
section.
GB-19