Hitachi RAS-3WHVRP Technical Catalogue

8 Refrigerant and water piping
Space heating and DHW
TCGB0123 rev.2 - 10/2019
104
8.3.6 Water piping
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Water piping length
Consider the following guidelines when designing the water circuit.
Item YUTAKI S
YUTAKI S
COMBI
Maximum water piping length between indoor unit and DHW tank 10 m --
Maximum water piping length between indoor unit and 3-way valve 3 m --
Maximum water piping length between 3-way valve and DHW tank 10 m --
Item YUTAKI M
Maximum water piping length between outdoor unit and domestic hot water
tank
10 m
Maximum water piping length between outdoor unit and domestic hot water
tank 3-way valve
10 m
Maximum total piping combination 10 m
? NOTE
DHW Piping length. It is recommended to avoid long runs of piping between the domestic hot water tank and hot water outlet side in order
to avoid heat losses.
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Water piping size
YUTAKI S
(inches)
Model
Space heating pipes connection
Inlet
connection
Outlet
connection
Shut-off valves
(2.0-3.0)HP
G 1”
(female)
G 1”
(female)
G 1” (male) -
G 1” (male)
YUTAKI S COMBI
(inches)
Model
Space heating connection DHW connection Solar connection (*)
Inlet
connection
Outlet
connection
Shut-off valves
Inlet
connection
Outlet
connection
P & T relief
valve (**)
Inlet
connection
Outlet
connection
(2.0-3.0)HP
G 1”
(female)
G 1”
(female)
G 1” (male) -
G 1” (male)
G 3/4”
(female)
G 3/4”
(female)
Ø15 mm
G 1/2”
(female)
G 1/2”
(female)
(*): Only for models for solar combination.
(**): Only for models for UK market.
YUTAKI M
(inches)
Model
Space heating pipes connection
Inlet
connection
Outlet
connection
Shut-off valves
(Field-supplied)
2.0HP
G 1”
(female)
G 1”
(female)
G 1” (male) -
G 1” (male)
3.0HP
G 1”
(female)
G 1”
(female)
G 1” (male) -
G 1” (male)

Hitachi RAS-3WHVRP Specifications

General

Brand	Hitachi
Model	RAS-3WHVRP
Category	Heat Pump
Language	English