Hitachi FSXNHE Serie Installations- Und Betriebshandbuch Seite 60

Piping work and refrigerant charge
4 Pipe diameter between the CH unit and the multikit (3 pipes and 2 pipes)
Maximum combination of
CH unit
indoor units
CH-6.0N(1/2)
CH-10.0N(1/2)
5 Pipe diameter for 2 pipes and multikit.
Total HP indoor unit
< 6
(6-8.99)
(9-11.99)
6 Pipe diameter between multikit and indoor unit
HP indoor unit
(0.8-1.5)
2.0
(2.5-6.0)
Pipe working conditions
For heat pump systems (2 pipes)
Total pipe length
Maximum pipe length
Maximum pipe length between the multikit of the first branch
and each indoor unit
Maximum pipe length between each multikit and each indoor
unit
Pipe length between connection kit 1 and each outdoor unit
Difference in height between
outdoor and indoor units
Difference in height between indoor units
Difference in height between outdoor units
46
PMML0294A_rev.2_02-2014.indb 46
Available combination of indoor
units capacity (H)
(8)
0.8 - 4.0
7
4.1 - 6.0
6.1 - 8.0
8
8.1 - 10.0
Gas Liquid
ø15.88 ø9.52
ø19.05 ø9.52
ø22.2 ø9.52
.
(4)
Gas Liquid
ø12.7 ø6.35
ø15.88 ø6.35
ø15.88 ø9.52
Part
Current length
Equivalent length
Highest outdoor unit
Lowest outdoor unit
PMML0294A rev.2 - 07/2014
.
(9)
Gas, low pressure
ø15.88
ø19.05
ø19.05
ø22.2
Total HP indoor unit
(12-15.99)
(16-17.99)
(18-25.99)
HP indoor unit
8.0
(5)
10.0
(5)
Make
≤ Recommended number
of connected indoor units
Current total liquid
≤ 1000 m
pipe length
≤ 165 m
L1
≤ 190 m
L2 ≤ 90 m
L3 ≤ 40 m
L5 ≤ 10 m
≤ 50 m
H1
≤ 40 m
H2 ≤ 30 m
H5 ≤ 0.1 m
3 pipes
Gas, high/low pressure Liquid
ø12.7
ø15.88
ø15.88
ø19.05
Gas Liquid
ø25.4 ø12.7
ø28.58 ø12.7
ø28.58 ø15.88
Gas Liquid
ø19.05 ø9.52
ø22.2 ø9.52
Permitted pipe length
(7)
≥ Recommended number
of connected indoor units
≤ 300 m
(8)
≤ 165 m
≤ 190 m
≤ 40 m
≤ 30 m
≤ 10 m
≤ 50 m
(9) (9)
≤ 40 m
≤ 30 m
≤ 0.1 m
ø9.52
ø9.52
ø9.52
ø9.52
14/07/2014 12:28:29