Hitachi YUTAKI S80 Series Installation And Operation Manual page 29

INSTALLATION

Connection procedure
Perform the flexible water pipes connection between indoor unit
and domestic hot water tank (Indoor unit water connections) as
follows:
1 Remove the indoor unit cover's protection to facilitate the con-
nection procedure.
2 Remove the metal plugs (Heating coil connections) from the
3-way valve and the T-branch. If necessary, disconnect the
3-way valve motor (upper part) to ease the installation pro-
cedure.
3-way valve
3-way valve
motor
(upper part)
Metal plug
3-way valve con-
nection for heating
coil inlet
3-way valve connection for
heating coil inlet
(Left side view)
29 PMML0291A rev.2 - 09/2014
T-branch
M e t a l
T-branch connec-
plug
tion for heating
coil outlet
T-branch connection for
heating coil outlet
3 Before performing the water pipe connections, bend the pipes
approximately as in the following figures. By this way, the pipe
end which will be connected to the tank's heating coil, will be
placed closer to its final connection position.
Recommended position of the heating coil inlet
pipe (short pipe 365 mm tube length)
3-way valve con-
nection for heating
coil inlet
Recommended position of the heating coil outlet
pipe (long pipe 960 mm tube length)
T-branch con-
nection for
heating coil
outlet
R ≥ 90mm
R > 90 mm
(Front view)
(Front view)
(Top view)