Water Piping; Water Piping Length; Water Piping Size - Hitachi YUTAKI RWM-2R1E Installation & Operation Manual

REFRIGERANT AND WATER PIPING

6.5 WATER PIPING

6.5.1 Water piping length

Consider the following guidelines when designing the water circuit.
Item
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

6.5.2 Water piping size

YUTAKI S
Model
Inlet connection
(2.0-3.0)HP G 1" (female)
(4.0-10.0)HP G 1-1/4" (female)
YUTAKI S COMBI
Model
Inlet connection
G 1"
(2.0-3.0)HP
(female)
G 1"
(4.0-6.0)HP
(female)
(*): 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)
Model
Inlet connection
G 1-1/4"
(4.0-6.0)HP
(female)
56 PMML0575 rev.2 - 03/2022
YUTAKI S
Space heating pipes connection
Outlet connection Shut-off valves
G 1" (female)
G 1-1/4" (male) -
G 1-1/4" (female)
G 1-1/4" (male)
Space heating connection
Outlet connection Shut-off valves
G 1"
(female)
G 1"
(female)
Space heating connection
Outlet
Shut-off valves
connection
G 1-1/4" G 1-1/4" (male) -
(female) G 1-1/4" (male)
YUTAKI S COMBI
10 m --
3 m --
10 m --
(inches)
G 1" (male) -
G 1" (male)
Inlet connection
G 1" (male) - G 3/4"
G 1" (male) (male)
G 1" (male) - G 3/4"
G 1" (male) (male)
(inches)
YUTAKI S80
DHW tank DHW tank
above the beside the
indoor unit indoor unit
-- 10 m
-- 3 m
-- 10 m
DHW connection
Outlet connection temperature relief
G 3/4"
(male)
G 3/4"
(male)
YUTAKI M
(R410A) /
YUTAKI M
(R32)
10 m
--
10 m
(inches)
Pressure and
valve (*)
Ø15 mm
Ø15 mm