Hitachi RAS-2.5WHVRP User Manual

ENGLISH
5 REFRIGERANT AND WATER PIPING
5.1 R32 REFRIGERANT CIRCUIT
5.1.1 General notes R32 refrigerant
This appliance is lled with R32, an odourless ammable refrigerant gas with low burning velocity (A2L class pursuant to ISO 817). If
the refrigerant is leaked, there is a possibility of ignition if it enters in contact with an external ignition source.
Make sure that unit installation and refrigerant piping installation comply with applicable legislation in each country. Also, in Europe,
EN378 must be complied, as it is the applicable standard.
5.1.2 Refrigerant piping

Refrigerant piping length between indoor unit and outdoor unit (For YUTAKI (S/S COMBI))
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 nal refrigerant charge amount, a minimum oor area for installation must be considered.
• If total refrigerant charge amount <1.84kg, there are no additional minimum oor area requirements.
• If total refrigerant charge amount ≥1.84kg, there are additional minimum oor area requirements to be checked.
New YUTAKI R32 range (2~3HP) due to low refrigerant charge amount and due to low additional charge needed, unit installation
can achieve up to 30m (2/2.5HP) / 27m (3HP) without any minimum oor area requirement.
2HP 2.5HP 3HP
Factory Charge kg 1.20 1.30 1.30
Charge-less piping length m 10 10 10
Additional Charge needed g/m 15 15 30
Maximum piping m 30 30 27
Maximum total refrigerant charge kg 1.50 1.60 1.81
Minimum room area requirement (Amin) m
2
No requirement is needed
Minimum piping length between outdoor unit and indoor unit (Lmin) m 3
Maximum height difference between indoor and outdoor unit (H)
Outdoor unit higher than indoor unit m
30 (2/2.5 HP)
27 (3 HP)
Indoor unit higher than outdoor unit m 20
In case of increasing more than 30m (2/2.5HP) / 27m (3HP) a minimum oor area requirement must be considered.
2HP 2.5HP 3HP (*)
Factory Charge kg 1.20 1.30 1.30
Charge-less piping length m 10 10 10
Additional Charge needed g/m 15 15 30
Maximum piping m 50 50 40
Maximum total refrigerant charge kg 1.80 1.90 2.20
Minimum room area requirement (Amin) m
2
No
requirement
is needed
Minimum area is
required
Minimum piping length between outdoor unit and indoor unit (Lmin) m 3
Maximum height difference between indoor and outdoor unit (H)
Outdoor unit higher than indoor unit m 30
Indoor unit higher than outdoor unit m 20
? NOTE
(*) In case of 3HP with piping length >27m, refrigerant piping diameter and additional charge quantity must be considered.
REFRIGERANT AND WATER PIPING
PMML0510 rev.1 - 10/2019
35

Hitachi RAS-2.5WHVRP Specifications

General

Brand	Hitachi
Model	RAS-2.5WHVRP
Category	Heat Pump
Language	English