Hitachi YUTAKI S Series Technical Catalogue page 112

8 Refrigerant and water piping
Space heating and DHW
8.3.6 Water piping

Water piping length
Consider the following guidelines when designing the water circuit.
Maximum water piping length between indoor unit and DHW tank
Maximum water piping length between indoor unit and 3-way valve
Maximum water piping length between 3-way valve and DHW tank
Maximum water piping length between outdoor unit and domestic hot water
tank
Maximum water piping length between outdoor unit and domestic hot water
tank 3-way valve
Maximum total piping combination
?
N O T E
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
Space heating pipes connection
Model
Inlet
connection
G 1"
(2.0-3.0)HP
(female)
YUTAKI S COMBI
Space heating connection
Model
Inlet
connection connection
G 1"
(2.0-3.0)HP
(female)
(*): Only for models for solar combination.
(**): Only for models for UK market.
YUTAKI M
Space heating pipes connection
Model
Inlet
connection
G 1"
2.0HP
(female)
G 1"
3.0HP
(female)
104 TCGB0123 rev.2 - 10/2019
Item
Item
(inches)
Outlet
Shut-off valves
connection
G 1" G 1" (male) -
(female) G 1" (male)
Outlet
Shut-off valves
G 1" G 1" (male) -
(female) G 1" (male)
(inches)
Outlet Shut-off valves
connection (Field-supplied)
G 1" G 1" (male) -
(female) G 1" (male)
G 1" G 1" (male) -
(female) G 1" (male)
YUTAKI S
10 m
10 m
YUTAKI M
10 m
10 m
10 m
DHW connection
Inlet Outlet
connection connection
G 3/4" G 3/4"
(female) (female)
YUTAKI S
COMBI
--
3 m --
--
Solar connection (*)
P & T relief Inlet Outlet
valve (**) connection connection
G 1/2"
Ø15 mm
(female) (female)
(inches)
G 1/2"