Refrigerant Charge Before Shipment (W (Kg)); Precautions In The Event Of Gas Refrigerant Leaks - Hitachi YUTAKI S80 R410A Series Installation And Operation Manual

◆ Refrigerant piping size
Piping connection size of outdoor unit & indoor unit
Pipe Connection size
Model Piping
(HP) length
Gas pipe
Ø 15.88
(4-6) 5~75m
(5/8")
5.2.1.1 Refrigerant charge before shipment (W
YUTAKI S80
Model
Outdoor unit
Indoor unit
5.2.2 Precautions in the event of gas refrigerant leaks
The installers and those responsible for drafting the specifications are obliged to comply with local
safety codes and regulations in the case of refrigerant leakage.
!
CAUTION
• Check for refrigerant leakage in detail. If a large refrigerant leakage occurred, it would cause
difficulty with breathing or harmful gases would occur if a fire were in the room.
• If the flare nut is tightened too hard, it may crack over time and cause refrigerant leakage.
Maximum permitted concentration of HFCs
◆
The refrigerant R410A (charged in the outdoor unit) and the refrigerant R134a (in case of
YUTAKI S80 indoor unit) are incombustible and non-toxic gases. However, if leakage occurs and gas
fills a room, it may cause suffocation.
The maximum permissible concentration of HFC gas according to EN378-1 is:
Refrigerant
R410A
R134a
PMEN0648 rev.0 - 03/2023
Outdoor unit
Liquid pipe
Ø 9.52
(3/8")
RAS-4WH(V)NPE
RAS-(5/6)WH(V)NPE
RWH-(4.0-6.0)(V)NF(W)E
Maximum permissible concentration (kg/m
Refrigerant pipe
(Between Outdoor unit and
Indoor unit)
Gas pipe Liquid pipe
Ø 15.88 Ø 9.52
(5/8") (3/8")
(kg))
0
W (kg) R410A
0
3.3
3.4
-
0.44
0.25
Indoor Unit
Pipe Connection size
Gas pipe Liquid pipe
Ø 15.88 Ø 9.52
(5/8") (3/8")
W (kg) R134a
0
-
-
1.9
)
3
25
5