Hitachi YUTAKI S80 Series - Water Pipes Connection to the Tank (DHW Pipes); Water Pipes Connection to the Tank (Heating Coil Pipes)

41
PMML0291A rev.2 - 09/2014
INSTALLATION
ENGLISH
7.5.6 Water pipes connection to the tank (DHW pipes)

Flexible water pipes identication
The DHW tank is factory supplied with four water pipes. In case of installation of the tank beside the indoor unit, the function of some
pipes will be different than if the tank is installed integrated over the indoor unit. It is necessary to identify what is the function of each
water pipe.
Factory-supplied
with the indoor unit
Heating coil pipes
Item Connection
365mm
960mm
Ø19.05
(3/4”)
Heating coil inlet pipe
For the connection between the heating coil inlet and one pipe of the
exible water pipes kit (ATW-FWP-01).
Heating coil outlet pipe
For the connection between the heating coil outlet and the other
pipe of the exible water pipes kit (ATW-FWP-01).
DHW pipes
Item Connection
Ø19.05
(3/4”)
960mm
1045mm
DHW inlet pipe
For the connection between the DHW inlet connection (cold water to
the tank) and the DHW installation.
DHW outlet pipe
For the connection between the DHW outlet connection (hot water
from the tank) and the DHW installation.

Connection procedure
Follow the same procedure explained in the same step “Water pipes connection to the tank (DHW pipes)“ of the section Installation of
indoor unit with HITACHI tank (Tank integrated over the indoor unit).
7.5.7 Water pipes connection to the tank (heating coil pipes)
1 Introduce the heating coil inlet pipe (short pipe 365 mm tube
length) (3/4”) from outside of the tank (through the rear hole of
the tank) and connect the elbow end to the heating coil inlet
connection.
Heating coil outlet
connection
Heating coil inlet
connection
Heating coil inlet
connection
Heating coil outlet
connection
(Front bottom view)