Refrigerant Piping - Hitachi YUTAKI S COMBI Series Installation And Operation Manual

5.2.2 Refrigerant piping
Refrigerant piping length between indoor unit and outdoor unit
◆
The unit installation and refrigerant piping should comply with the relevant local and national
regulations for the designed refrigerant.
Due to R32 refrigerant and depending on final refrigerant charge amount, a minimum floor area
for installation must be considered.
• If total refrigerant charge amount <1.84kg, there are no additional minimum floor area
requirements.
• If total refrigerant charge amount ≥1.84kg, there are additional minimum floor area
requirements to be checked.
New YUTAKI R32 range (1.5-3HP) due to low refrigerant charge amount and due to low additional
charge needed, unit installation can achieve up to 30m without any minimum floor area
requirement.
Factory Charge
Charge-less piping length
Additional Charge needed
Maximum piping
Maximum total refrigerant charge
Minimum room area requirement (Amin)
Minimum piping length between outdoor unit and indoor unit (Lmin)
Maximum height difference between indoor and outdoor unit (H)
Outdoor unit higher than indoor unit
Indoor unit higher than outdoor unit
PMEN0645 rev.0 - 04/2023
1.5HP 2HP 2.5HP
kg 1.1 1.1 1.3
m 10 10 10
g/m 15 15 15
m 30 30 30
kg 1.4 1.4 1.6
m No requirement is needed
2
m 3
m 30
m 20
3HP
1.3
10
15
5
30
1.6
21