Hitachi RPI-5.0FSN4E - Special attention regarding refrigerant gas leakage; 9.5.1 Precautions in the event of refrigerant leaks; Maximum permitted concentration of hydrofluorcarbon (HFC)

• For heat recovery system (3 pipes)
Model
RAS-24FSXNH(E)-P
RAS-26FSXNH(E)
RAS-28FSXNH(E) RAS-30FSXNH(E) RAS-32FSXNH(E) RAS-34FSXNH(E) RAS-36FSXNH(E)
Unit A RAS-10FSXNH(E) RAS-12FSXNH(E) RAS-12FSXNH(E) RAS-12FSXNH(E) RAS-12FSXNH(E) RAS-12FSXNH(E)
Unit B RAS-8FSXNH(E) RAS-8FSXNH(E) RAS-10FSXNH(E) RAS-12FSXNH(E) RAS-12FSXNH(E) RAS-12FSXNH(E)
Unit C RAS-8FSXNH(E) RAS-8FSXNH(E) RAS-8FSXNH(E) RAS-8FSXNH(E) RAS-10FSXNH(E) RAS-12FSXNH(E)
Connection kit MC-30XN1
Piping sizes
(Ø mm)
a
Gas (low pressure)
31.75
(31.75-34.9)
31.75
(31.75-34.9)
31.75
(31.75-34.9)
31.75
(31.75-34.9)
31.75
(31.75-34.9)
38.1
(38.1-41.3)
Gas
(high/low pressure)
25.4
(25.4-28.58)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
Liquid
19.05
(19.05-22.2)
19.05
(19.05-22.2)
19.05
(19.05-22.2)
19.05
(19.05-22.2)
19.05
(19.05-22.2)
19.05
(19.05-22.2)
b
Gas (low pressure)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
28.58
(28.58-31.75)
Gas
(high/low pressure)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
25.4
(25.4-28.58)
25.4
(25.4-28.58)
Liquid
15.88
(15.88-19.05)
15.88
(15.88-19.05)
15.88
(15.88-19.05)
15.88
(15.88-19.05)
15.88
(15.88-19.05)
15.88
(15.88-19.05)
c
Gas (low pressure)
22.2
(22.2-25.4)
25.4
(25.4-28.58)
25.4
(25.4-28.58)
25.4
(25.4-28.58)
25.4
(25.4-28.58)
25.4
(25.4-28.58)
Gas
(high/low pressure)
19.05
(19.05-22.2)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
Liquid
9.52
(9.52-12.7)
12.7
(12.7-15.88)
12.7
(12.7-15.88)
12.7
(12.7-15.88)
12.7
(12.7-15.88)
12.7
(12.7-15.88)
d
Gas (low pressure)
19.05
(19.05-22.2)
19.05
(19.05-22.2)
22.2
(22.2-25.4)
25.4
(25.4-28.58)
25.4
(25.4-28.58)
25.4
(25.4-28.58)
Gas
(high/low pressure)
15.88
(15.88-19.05)
15.88
(15.88-19.05)
19.05
(19.05-22.2)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
22.2
(22.2-25.4)
Liquid
9.52
(9.52-12.7)
9.52
(9.52-12.7)
9.52
(9.52-12.7)
12.7
(12.7-15.88)
12.7
(12.7-15.88)
12.7
(12.7-15.88)
e
Gas (low pressure)
19.05
(19.05-22.2)
19.05
(19.05-22.2)
19.05
(19.05-22.2)
19.05
(19.05-22.2)
22.2
(22.2-25.4)
25.4
(25.4-28.58)
Gas
(high/low pressure)
15.88
(15.88-19.05)
15.88
(15.88-19.05)
15.88
(15.88-19.05)
15.88
(15.88-19.05)
19.05
(19.05-22.2)
22.2
(22.2-25.4)
Liquid
9.52
(9.52-12.7)
9.52
(9.52-12.7)
9.52
(9.52-12.7)
9.52
(9.52-12.7)
9.52
(9.52-12.7)
12.7
(12.7-15.88)
Perform the installation of the outdoor unit and piping connection according to the gure. Refer to the table for the outdoor unit model,
the piping connection kit model and the piping diameter.
If the specied 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-(50-54)FSXN1E (Combination of 4 units)
D
D
C3
C3
A
Main outdoor unit
B
Secondary outdoor units
C
D
C1
Connection kit 1
C2
Connection kit 2
C3
Connection kit 3
1
Indoor units on left side
2
Indoor units on right side
Install the outdoor units and connect the refrigerant pipes as shown in the diagram. Please refer to the table to determine the appropri-
ate connection kit and the diameter of the pipes for each unit.
38
PMML0294A rev.2 - 07/2014
Piping work and refrigerant charge
PMML0294A_rev.2_02-2014.indb 38 14/07/2014 12:28:24