Hitachi YUTAKI S80 Series Installation And Operation Manual page 30

INSTALLATION
4 Connect the heating coil inlet pipe (short pipe 365 mm tube
length) (3/4") by its elbow end to the 3-way valve connection
for heating coil inlet.
4.1)
4.2)
(Left side view)
30
3-way valve connection
for heating coil inlet
PMML0291A rev.2 - 09/2014
5 Connect the heating coil outlet pipe (long pipe 960 mm tube
length) (3/4") by its elbow end to the T-branch connection for
heating coil outlet.
5.1)
5.2)
(Left side view)
T-branch connection for
heating coil outlet