Water Piping; Water Piping Length; Water Piping Size - Hitachi YUTAKI Series Installation And Operation Manual

REFRIGERANT AND WATER PIPING

5.3 WATER PIPING

5.3.1 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

5.3.2 Water piping size

YUTAKI S
Space heating pipes connection
Model
Inlet
connection
(2.0-3.0)HP G 1" (female)
G 1-1/4"
(4.0-10.0)HP
(female)
YUTAKI S COMBI
Space heating connection
Model
Inlet
connection
G 1"
(2.0-3.0)HP
(female)
G 1-1/4"
(4.0-6.0)HP
(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)
Space heating connection
Model
Inlet
connection
G 1-1/4"
(4.0-6.0)HP
(female)
41 PMML0510 rev.1 - 10/2019
(inches)
Outlet
Shut-off valves
connection
G 1" (male) -
G 1" (female)
G 1" (male)
G 1-1/4" G 1-1/4" (male) -
(female) G 1-1/4" (male)
Outlet Shut-off
connection valves
G 1" G 1" (male) -
(female) G 1" (male)
G 1-1/4" G 1-1/4" (male) -
(female) G 1-1/4" (male)
(inches)
Outlet
Shut-off valves
connection
G 1-1/4" G 1-1/4" (male) -
(female) G 1-1/4" (male)
YUTAKI S
YUTAKI S
COMBI
10 m --
3 m --
10 m --
DHW connection
Pressure and
Inlet Outlet
connection connection
relief valve (**)
G 3/4" G 3/4"
(female) (female)
G 3/4" G 3/4"
(female) (female)
YUTAKI S80
DHW tank DHW tank
above the beside the
indoor unit indoor unit
-- 10 m
-- 3 m
-- 10 m
Solar connection (*)
Inlet
temperature
connection
G 1/2"
Ø15 mm
(female)
G 1/2"
Ø15 mm
(female)
YUTAKI M
(R410A) /
YUTAKI M
(R32)
10 m
--
10 m
(inches)
Outlet
connection
G 1/2"
(female)
G 1/2"
(female)