Hitachi RAS-8FSXNS2E Installation & Operation Manual page 25

◆ For heat recovery systems (3 pipes)
For selecting the pipe sizes between the outdoor unit and the piping connection kit 1, between the
piping connection kits 2 and for piping connection kit Ⓐ, refer to the print version of the manual.
Combination of 2 and 3 units
Indoor Unit Side
Piping
Connection Kit 1
Ⓑ
First Branch
④
④
H4
Ⓒ
L3
Indoor
Unit
Exclusive Use of
Cooling Operation
Header Branch
④
⑤ ⑤
CH
CH
L3
⑦ ⑦
Indoor Indoor
Unit Unit
L: Keep the straight line distance of 500mm or more after the piping connection kit.
PMML0628 rev.0 - 05/2023
Outdoor
Unit
A
①
La
L
②
Ⓐ
Ⓒ
⑤
Ⓖ
⑦
L3
Indoor
Unit
⑥
H7
⑥
f
e
Ⓓ
Ⓓ
g
⑦
Indoor
Unit
Ⓔ
⑥
⑥
f
CH
⑤
Ⓓ
Ⓓ
e
g
⑦
⑦
Indoor
Unit
Header Branch (CH-Box in Common Use)
Ⓔ
⑤
CH
⑤
CH
⑦
Indoor
Unit
Outdoor
Unit
B
①
Lb
L
Ⓐ
Piping
Connection
Kit 2
CH-M
⑦
⑦
Indoor Indoor
Unit Unit
L3
i
h
⑦ ⑦
Indoor Indoor
Unit Unit
L3
h i
⑦
Indoor
H3
Unit
⑦
Terminal
Indoor Unit
⑥
e
g
f
⑦ ⑦
Indoor Indoor
Unit Unit
Upstream Side
Outdoor
Unit
H5
C
①
Lc
⑤
Ⓔ
L3
CH
H6
Indoor
Unit
L2
H1
H2
L2 L1
High/Low Pressure Gas Pipe,
Ⓕ
Low Pressure Gas Pipe, Liquid Pipe
h
Gas Pipe, Liquid Pipe
⑦
Low Pressure Gas Pipe, Liquid Pipe
Indoor
CH: CH-Box (Single branch type)
Unit
CH-M: CH-Box (Multiple Branch Type)
to Ⓗ
3
to Ⓘ
18