Hitachi FSXNHE Serie Installations- Und Betriebshandbuch Seite 48

Piping work and refrigerant charge

Pipe sizes for RAS-(8-16)FSXN1E and RAS-(5-12)FSXNH(E) (base unit)
a
• For Heat pump systems (2 pipes)
Model
High/Low
pressure gas
Piping size
a
(Ø mm)
Liquid
Model
High/Low
pressure gas
Piping size
a
(Ø mm)
Liquid
• For Heat recovery systems (3 pipes)
Model
Gas
(low pressure)
Piping size Gas
a
(Ø mm) (high/low pressure)
Liquid
Model
Gas
(low pressure)
Piping size Gas
a
(Ø mm) (high/low pressure)
Liquid
• If the specified main refrigerant piping on the table is not available on site, follow the allowable piping size in parentheses. When
using the main refrigerant piping indicated in parentheses, prepare an appropriate reducer on site.

Pipe sizes for RAS-(18-32)FSXN1E and RAS-(14-24)FSXNH(E) (Combination of 2 units)
Install the outdoor units and connect the refrigerant pipes as shown in the diagram. Please refer to the table to determine the appropriate
connection kit and the diameter of the pipes for each unit.
34
PMML0294A_rev.2_02-2014.indb 34
N O T E
Ensure that the refrigerant pipe should be connected to the same refrigerant cycle unit.
RAS-8FSXN1E RAS-10FSXN1E
19.05
(19.05 - 22.2)
9.52
(9.52 - 12.7)
RAS-5FSXNH(E) RAS-6FSXNH(E)
15.88
(15.88-19.05)
9.52
(9.52 - 12.7)
RAS-8FSXN1E RAS-10FSXN1E
19.05
(19.05 - 22.2)
15.88
(15.88 - 19.05)
9.52
(9.52 - 12.7)
RAS-5FSXNH(E) RAS-6FSXNH(E)
15.88
(15.88 - 19.05)
12.7
(12.7 - 15.88)
9.52
(9.52 - 12.7)
PMML0294A rev.2 - 07/2014
RAS-12FSXN1E
22.2 25.4
(22.2 - 25.4) (25.4 - 28.58)
9.52 12.7
(9.52 - 12.7) (12.7 - 15.88)
RAS-8FSXNH(E)
19.05 19.05
(19.05 - 22.2) (19.05 - 22.2)
9.52 9.52
(9.52 - 12.7) (9.52 - 12.7)
RAS-12FSXN1E
22.2 25.4
(22.2 - 25.4) (25.4 - 28.58)
19.05 22.2
(19.05 - 22.2) (22.2 - 25.4)
9.52 12.7
(9.52 - 12.7) (12.7 - 15.88)
RAS-8FSXNH(E)
19.05 19.05
(19.05 - 22.2) (19.05 - 22.2)
15.88 15.88
(15.88 - 19.05) (15.88 - 19.05)
9.52 9.52
(9.52 - 12.7) (9.52 - 12.7)
RAS-14FSXN1E RAS-16FSXN1E
25.4 28.58
(25.4 - 28.58) (28.58 - 31.75)
12.7 12.7
(12.7 - 15.88) (12.7 - 15.88)
RAS-10FSXNH(E) RAS-12FSXNH(E)
22.2 25.4
(22.2 - 25.4) (25.4 - 28.58)
9.52 12.7
(9.52 - 12.7) (12.7 - 15.88)
RAS-14FSXN1E RAS-16FSXN1E
25.4 28.58
(25.4 - 28.58) (28.58 - 31.75)
22.2 22.2
(22.2 - 25.4) (22.2 - 25.4)
12.7 12.7
(12.7 - 15.88) (12.7 - 15.88)
RAS-10FSXNH(E) RAS-12FSXNH(E)
22.2 25.4
(22.2 - 25.4) (25.4 - 28.58)
19.05 22.2
(19.05 - 22.2) (22.2 - 25.4)
9.52 12.7
(9.52 - 12.7) (12.7 - 15.88)
A Main outdoor unit
B Secondary outdoor units
C Connection kit
1 Indoor units on left side
2
Indoor units on right side
14/07/2014 12:28:23