Mitsubishi Electric CITY MULTI PURY-HP-TNU-A1 Manuel D'installation page 25

<Refrigerant piping connection examples>
・Obtain joints and elbows on site as necessary according to the pipe diameter, and connect the pipes as shown in the figures below.
(1) When routing the pipes through the front of the unit
Ⓓ
(2) When routing the pipes through the bottom of the unit
Ⓑ
<A> High-pressure side
<B> Low-pressure side
Ⓐ Refrigerant service valve piping
Ⓑ Reducer etc.
Elbow
Ⓒ
On-site piping
Ⓓ
<Reference> Size of refrigerant pipes
High-pressure side
HP72 ø15.88 (ø5/8)
HP96
ø19.05 (ø3/4)
HP120
・When expanding the on-site piping, satisfy the minimum insertion depth requirement as follows.
Pipe size [mm (in)]
ø5 (ø1/4) or more, less than ø8 (ø3/8)
ø8 (ø3/8) or more, less than ø12 (ø1/2)
ø12 (ø1/2) or more, less than ø16 (ø11/16)
ø16 (ø11/16) or more, less than ø25 (ø1)
ø25 (ø1) or more, less than ø35 (ø1-7/16)
ø35 (ø1-7/16) or more, less than ø45 (ø1-13/16)
WT10508X02
<A>
<B>
Ⓑ Ⓐ
<A>
<B>
Ⓓ Ⓒ Ⓐ
On-site piping [mm (in)]
Low-pressure side
ø19.05 (ø3/4)
ø22.2 (ø7/8)
ø28.58 (ø1-1/8)
Service valve piping [mm (in)]
High-pressure side
ø22.2 (ø7/8)
ø28.58 (ø1-1/8)
Minimum insertion depth [mm (in)]
6 (1/4)
7 (5/16)
8 (3/8)
10 (7/16)
12 (1/2)
14 (9/16)
GB-23
Low-pressure side
ø28.58 (ø1-1/8)