Hitachi SET FREE Serie Manual De Instrucciones página 34

PIPING WORK AND REFRIGERANT CHARGE
Ⓑ First branch
outdoor unit HP
5
6-10
12-16
18,20
22, 24
26-54
Ⓒ Multi-Kit after first branch (3 pipes section)
total indoor unit HP
<6
6-11.99
12-17.99
18-21.99
22-25.99
≥ 26
Ⓓ Multi-Kit after first CH-Box or cooling only section (2 pipes
section)
total indoor unit HP
<12
12-17.99
18-25.99
≥ 26
Ⓔ Header branch for 3 pipes section
number of header
total indoor unit HP
branches
5-10
Ⓕ Header branch for 2 pipes section
number of header
total indoor unit HP
branches
5-8
5-10
 Diameter of the main pipe (from the base unit or connection
kit 1 to the first branch) (3 pipes).
outdoor unit Gas, low
(HP) pressure
5 ø15.88
(6/8) ø19.05
10 ø22.2
(12/14) ø25.4
16 ø28.58
(18/20) ø28.58
(22/24) ø28.58
26 ø31.75
(28-34) ø31.75
36 ø38.1
38-54 ø38.1
?
n o t e
When the maximum length of the equivalent refrigerant pipe from the
piping connection kit 1 to the indoor unit is over 100m, the pipe size
of liquid line from the piping connection kit 1 to first branch should be
increased by one size with reducers (field-supplied).
24 PMML0479 rev.2 - 02/2018
model
E-52XN3
E-102XN3
E-162XN3
E-202XN3
E-242XN3
E-322XN3
model
E-52XN3
E-102XN3
E-162XN3
E-202XN3
E-242XN3
E-322XN3
model
E-102SN4
E-162SN4
E-242SN3
E-302SN3
model
8 MH-108XN
model
4 MH-84AN1
8 MH-108AN
Gas, high/low
liquid
pressure
ø12.7 ø9.52
ø15.88 ø9.52
ø19.05 ø9.52
ø22.2 ø12.7
ø22.2 ø12.7
ø22.2 ø15.88
ø25.4 ø15.88
ø25.4 ø19.05
ø28.58 ø19.05
ø28.58 ø19.05
ø31.75 ø19.05
 Pipe diameter after first branch or between Multi-Kits in the
main branch (3 pipes section)
total HP Gas, low
indoor unit pressure
< 6 ø15.88
(6-8.99) ø19.05
(9-11.99) ø22.20
(12-15.99) ø25.40
(16-17.99) ø28.58
(18-21.99) ø28.58
(22-25.99) ø28.58
(26-35.99) ø31.75
≥36 ø38.10
?
n o t e
Even if the equivalent refrigerant piping length is more than 100m, no
need to increase the pipe size after first branch. If the multi-kit size is
larger than the first branch,adjust the multi-kit size to the first branch. In
case that the selected pipe size after the first branch is larger than the
pipe size before the first branch, use the same pipe size as before the
branch.
 Pipe diameter for 2 pipes and Multi-Kit.
total HP indoor unit
< 6
(6-8.99)
(9-11.99)
(12-15.99)
(16-17.99)
(18-25.99)
 Pipe diameter between Multi-Kit and indoor unit
HP indoor unit
(0.8-1.5)
2.0
(2.5-6.0)
8.0
10.0
16.0
20.0
?
n o t e
• (*): When the liquid piping length is longer than 15m, use Ø9.52 pipe
and reducer (field-supplied).
• The pipe diameter should be the same as the indoor unit piping
connection size.
• Check the corresponding Indoor unit connection sizes.
Gas, high/low
liquid
pressure
ø12.7 ø9.52
ø15.88 ø9.52
ø19.05 ø9.52
ø22.20 ø12.70
ø22.20 ø12.70
ø22.20 ø15.88
ø25.40 ø15.88
ø28.58 ø19.05
ø31.75 ø19.05
Gas liquid
ø15.88 ø9.52
ø19.05 ø9.52
ø22.2 ø9.52
ø25.4 ø12.7
ø28.58 ø12.7
ø28.58 ø15.88
.
(4)
Gas liquid
ø12.7 ø6.35(*)
ø15.88 ø6.35(*)
ø15.88 ø9.52
ø19.05 ø9.52
ø22.2 ø9.52
ø28.58 ø12.70
ø28.58 ø15.88