Hitachi EV-1.5N1 Manual De Instalación Y Funcionamiento página 12

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
"2.5.2 Installation Method").
2 Regarding refrigerant piping work, refer to
outdoor unit.
3 The height difference between the indoor unit and the expansion valve kit is within 2m.
3.1 refrigerant piping lengtH and additional refrigerant
For using RPK-FSNH4M (Wall Type indoor units without expansion valve) and expansion valve kit, the installation work shall be performed with followings.
1 For RPK-FSNH4M (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
additional refrigerant charge
quantity depending on the
piping length and the piping
Series
FS(V)NME RAS-(4-6)FS(V)NME
FSXNME RAS-(8-12)FSXNME
H(V)N(P/C)(1)(E) RAS-(2-12)H(V)N(P/C)(1)(E)
FSXNSE RAS-(8-96)FSXNSE
FSXNPE RAS-(5-72)FSXNPE
6
Installation & Maintenance Work
Calculate the
additional refrigerant charge
quantity "b kg" per 1m
Calculate the
size
Liquid line
Multi Kit (Liquid line)
expansion valve kit ~
model
indoor unit liquid pipe
size (Ømm)
PMML0268A rev.4 - 02/2020 - P5416576
or Technical Catalog of the indoor unit and the
Indoor unit
Expansion
a
expansion valve kit ~ indoor unit
additional refrigerant charge quantity
6.35
6.35
6.35
valve kit
b
(kg/m)
0.011
0.011
0.011
restriction number
of connectable
indoor unit
(b)
(c)
(a)