Hitachi EV-1.5N1 Manual De Instalación Y Funcionamiento página 13

Refrigerant piping work
3 REFRIGERANT PIPING WORK
1 Connect the expansion valve kit to the liquid pipe according to the arrow direction on the expansion valve kit (refer to the item
Installation method).
2 Regarding refrigerant piping work, refer to
unit.
3 The height difference between the indoor unit and the expansion valve kit is within 2m.
3.1 REFRIGERANT PIPING THICKNESS
Refer to the pipe diameter in the table when connecting to the
indoor unit.
3.2 REFRIGERANT PIPING LENGTH AND ADDITIONAL REFRIGERANT
For using RPK-FSNH3M (Wall Type indoor units without expansion valve) and expansion valve kit, the installation work shall be per-
formed with followings.
1 For RPK-FSNH3M (Wall Type indoor units without expansion valve), the total piping length between expansion valve kit and indoor
unit is restricted as shown in the table below.
2 For SET-FREE/UTOPIA series outdoor units, the appropriate refrigerant quantity is required to be additionally charged depending
on the piping length and the piping size. When the additional refrigerant charge quantity at connected liquid pipe is calculated,
calculate the following additional refrigerant quantity each.
* Quantity for liquid pipe between Multi Kit and expansion valve kit
* Quantity between indoor unit and expansion valve kit
Total additional refrigerant charge quantity =
Additional refrigerant charge quantity between Multi Kit and expansion valve kit +
Additional refrigerant charge quantity between indoor unit and expansion valve kit
nal refrigerant charge quan-
tity depending on the piping
length and the piping size
Series Model
FS(V)N(Y)2E RAS-(4-6)FS(V)N(Y)2E
H(V)N(P/C)(1)(E) RAS-(2-12)H(V)N(P/C)(1)(E)
RAS-(8-54)FSXN1E(-P)
FSXN(1/H)(E)(-P)
RAS-(5-36)FSXNH(E)(-P)
RAS-5FSN
FSN
RAS-(34-42)FSN
FSN1 RAS-(8-32)FSN1
FSN2 RAS-(8-48)FSN2
FSXN RAS-(8-54)FSXN
FSNM RAS-(8-12)FSNM
(*): When connecting the liquid piping between the expansion valve kit and the indoor unit, reduce the piping size of the expansion valve kit
connection and the indoor unit connection to Ø6.35 with reducers (field-supplied).
13 PMML0268A rev.1 - 09/2015 - P5416576
Installation & Maintenance Work
Calculate the
additional
refrigerant charge quantity
"b kg" per 1m
Calculate the additio-
Liquid line
Multi Kit (Liquid line)
a
Expansion valve kit ~
indoor unit liquid pipe
size (Ømm)
6.35
6.35
6.35
9.52 (*)
9.52 (*)
9.52 (*)
9.52 (*)
9.52 (*)
or Technical Catalog
Pipe size
Indoor unit capacity
1.0 and 1.5HP
Indoor unit
Expansion
valve kit
b
Expansion valve kit ~ indoor unit additional
refrigerant charge quantity (kg/m)
0.011
0.011
0.011
0.05
0.05
0.05
0.05
0.05
of the indoor unit and the outdoor
Liquid (Ø mm)
9.52
Restriction number
of connectable
indoor unit
(f)
P: (g) / C: (h)
(a)
(b)
(c)
(d)
(e)