Refrigerant Charge; R410A Refrigerant Circuit; Refrigerant Piping - Hitachi YUTAKI Series Installation And Operation Manual

REFRIGERANT AND WATER PIPING

5.1.3 Refrigerant charge

5.1.3.1 Refrigerant charge amount
YUTAKI S/S COMBI 2-3HP
The R32 refrigerant is factory charged in the outdoor unit with a refrigerant charge amount for 10 m of piping length between outdoor
and indoor unit.
YUTAKI M
YUTAKI M unit is a Monobloc system (closed refrigerant circuit) which has been factory charged, so additional refrigerant charge is
not required.
5.1.3.2 Refrigerant charge before shipment (W
YUTAKI S/S COMBI 2-3HP
YUTAKI M (R32)

5.2 R410A REFRIGERANT CIRCUIT

5.2.1 Refrigerant piping

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Refrigerant piping length between indoor unit and outdoor unit (For YUTAKI (S/S COMBI/S80))
The refrigerant piping length between indoor unit and outdoor unit should be designed using the following chart. Keep the design
point within the area of the chart, which is showing the applicable height difference according to piping length.
Height difference (m)
When outdoor unit is
installed higher than
indoor unit
When outdoor unit is
installed lower than
indoor unit
Maximum piping length between outdoor
unit and indoor unit (Lmax)
Minimum piping length between outdoor
unit and indoor unit (Lmin)
Maximum height difference between indoor
and outdoor unit (H)
?
N O T E
(*): If the actual piping length between outdoor and indoor unit needs to be less than 5m, contact with your dealer.
37 PMML0510 rev.1 - 10/2019
(kg))
0
Outdoor unit model
RAS-2WHVRP
RAS-2.5WHVRP
RAS-3WHVRP
Model
RASM-2VRE
RASM-3VRE
Total length between outdoor unit and indoor unit.
Actual piping length (L)
Equivalent piping length (X)
Actual piping length
Outdoor unit higher than indoor unit
Indoor unit higher than outdoor unit
W (kg)
0
1.2
1.3
1.3
W (kg)
0
1.2
1.3
+H
OU Model
2-3 HP 4-6 HP
50 m 75 m
70 m 95 m
5 m (*)
30 m
20 m
8/10 HP
70 m
90 m