Hitachi YUTAKI Series - Water Piping; Water Piping Length; Water Piping Size

ENGLISH
5.3 WATER PIPING
5.3.1 Water piping length
Consider the following guidelines when designing the water circuit.
Item YUTAKI S
YUTAKI S
COMBI
YUTAKI S80
YUTAKI M
(R410A) /
YUTAKI M
(R32)
DHW tank
above the
indoor unit
DHW tank
beside the
indoor unit
Maximum water piping length between indoor unit and
DHW tank
10 m -- -- 10 m 10 m
Maximum water piping length between indoor unit and
3-way valve
3 m -- -- 3 m --
Maximum water piping length between 3-way valve and
DHW tank
10 m -- -- 10 m 10 m
5.3.2 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)
(4.0-10.0)HP
G 1-1/4”
(female)
G 1-1/4”
(female)
G 1-1/4” (male) -
G 1-1/4” (male)
YUTAKI S COMBI
(inches)
Model
Space heating connection DHW connection Solar connection (*)
Inlet
connection
Outlet
connection
Shut-off
valves
Inlet
connection
Outlet
connection
Pressure and
temperature
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)
(4.0-6.0)HP
G 1-1/4”
(female)
G 1-1/4”
(female)
G 1-1/4” (male) -
G 1-1/4” (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 S80 indoor unit
Type 1: Version for operation in DHW but with a remote tank (RWH-(4.0-6.0)(V)NFE)
(inches)
Model
Space heating connection
Inlet
connection
Outlet
connection
Shut-off valves
(4.0-6.0)HP
G 1-1/4”
(female)
G 1-1/4”
(female)
G 1-1/4” (male) -
G 1-1/4” (male)
REFRIGERANT AND WATER PIPING
PMML0510 rev.1 - 10/2019
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