Hitachi RAS-8FSNM - Refrigerant Piping Work

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5.2 Refrigerant Piping Work
(1) Ensure that the directions for refrigerant piping work according to the tables.
Table 5.2 Limitation of Outdoor Unit
Table 5.1 Indoor Unit Type List
Length
Model Gas (*1) Liquid
RAS-8FSNM(Q)
9.53
( 12.7 (*2))
RAS-10FSNM(Q)
RAS-12FSNM(Q)
(*1): The accessory pipe with flange is attached.
(*2): Select the liquid piping size of 12.7 when the piping length is more than 70m. only for RAS-8FSNM(Q)
Outer Diameter and
Piping Size (mm)
Maximum Piping Length
Maximum Lift between
Outdoor Unit and Indoor Unit
25.4
12.7
Actual Length ≤ 100m
Equivalent Length ≤ 125m
Outdoor Unit is higher than Indoor Unit: ≤ 50m
Indoor Unit is higher than Outdoor Unit: ≤ 40m
Combination between Indoor Unit and Outdoor Unit
Indoor Unit Type
In-the-Ceiling
In-the-Ceiling
Low Height
4-Way Cassette
2-Way Cassette
Wall
Floor
Floor Conncealed
Ceiling
Available
Nominal Horsepower (HP)
1.00.8 2.01.5 3.02.5 4.03.3 8.05.0 10.0
2.3
A maximum total capacity of 130% and a minimum total capacity of 50% can be obtained
by combination of the indoor units when compared with the nominal outdoor unit capacity.
Table 5.2 System Combination
Outdoor Unit Model
Minimum
Combination
Capacity
Maximum
Combination
Capacity
Combination
Quantity
Minimum
Individual
Operation
Capacity
22.2
19.05
HP HP HP
4.0
5.0
6.0
10.4
13.0
15.6
0.8
0.8
0.8
Indoor Unit
(*1) A total capacity of 100% must be obtained by combination of the indoor units when compared
with the nominal outdoor unit capacity, if only one indoor unit is combined.