Premisys MP Series - Split DX Piping Design and Installation; R410 A Piping Design - 1-Pipe; Refrigerant Line Sizes

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Packaged and Split Rooftop Ventilator
Split DX Piping Installation
R410A Piping Design
1- Pipe
Refrigerant pipe for CITY MULTI
®
shall be made of
phosphorus deoxidized copper, and has two types.
• Type-O: Soft copper pipe (annealed copper pipe),
can be easily bent with human’s hands.
• Type-
1
⁄2H pipe: Hard copper pipe (straight pipe),
being stronger than Type-O pipe of the same radical
thickness.
The maximum operation pressure of R410A air
conditioner is 4.30 MPa [624psi]. The refrigerant piping
should ensure the safety under the maximum operation
pressure. Follow the recommended pipe size in the table
below or you shall follow the local industrial standard.
Pipes of radial thickness 0.7mm or less shall not be
used.
Copper Pipe Size and Radial Thickness for
R410A CITY MULTI
®
Size
(mm)
O.D.
Size
(in.)
O.D.
**Radial
Thickness
(mm)
**Radial
Thickness
(in.)
*Pipe
Type
ø6.35 ø
1
⁄4 0.8 [32] 1 or 2
ø9.52 ø
3
⁄8 0.8 [32] 1 or 2
ø12.7 ø
1
⁄2 0.8 [32] 1 or 2
ø15.88 ø
5
⁄8 1.0 [40] 1 or 2
ø19.05 ø
3
⁄4 1.2 [48] 1 or 2
ø22.2 ø
7
⁄8 1.0 [40] 2
ø25.4 ø1 1.0 [40] 2
ø28.58 ø1
1
⁄8 1.0 [40] 2
ø31.75 ø1
1
⁄4 1.1 [44] 2
ø34.93 ø1
3
⁄8 1.2 [48] 2
ø41.28 ø1
5
⁄8 1.4 [56] 2
*Pipe Type:
1=ACR-Annealed
2=ACR-Drawn Temper
**The gures in the radial thickness column are based on the Japanese
standards and provided only as a reference. Use pipes the meet the local
standards.
Piping Design
Refrigerant Line Sizes
DOAS Unit Refrigerant Line Connections
(in.)
MPF-1-**-**-96-1
1
⁄2 liquid 1
1
⁄8 suction
1
MPF-1-**-**-144-1
1
⁄2 liquid 1
1
⁄8 suction
MPF-2-**-**-144-1
1
⁄2 liquid 1
1
⁄8 suction
MPF-2-**-**-192-1
5
⁄8 liquid 1
3
⁄8 suction
2
MPF-2-**-**-240-1
5
⁄8 liquid 1
3
⁄8”suction
2
1
Field supplied 1
1
⁄8” -
7
⁄8” OD coupling may be needed at DOAS for
installation.
2
Field supplied 1
3
⁄8” - 1
1
⁄8” OD coupling will be needed at DOAS for
installation.
Outdoor Unit
Model
Refrigerant Line
Connections (in.)
DOAS
Model
PUHY-P96T/
YKMU
1
⁄2 liquid
7
⁄8 suction MPF-1
PUHY-P144T/
YKMU
1
⁄2 liquid
1
1
⁄8
suction
MPF-1
PUHY-P144T/
YKMU
1
⁄2 liquid
1
1
⁄8
suction
MPF-2
PUHY-P192T/
YSKMU
5
⁄8 liquid
1
1
⁄8
suction
MPF-2
PUHY-P240T/
YSKMU
5
⁄8 liquid
1
1
⁄8
suction
MPF-2
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