Water Pipes Connection To The Tank (Heating Coil Pipes); Water Pipes Connection To The Dhw Installation (Dhw Pipes) - Hitachi YUTAKI S80 Series Installation And Operation Manual

INSTALLATION
C A U T I O N
• The tank's weight is very high; therefore use at least two peo-
ple when lifting it.
• Take care with the connected flexible water pipes (both in-
door unit and tank connections) when placing the tank over
the unit.
3 Fix the 4 bolts (factory supplied) between the indoor unit and
tank (2 screws accessing from left side and the other 2 ac-
cessing from right side).
(Left side)
34
(Right side)
(x4)
PMML0291A rev.2 - 09/2014
7.4.9 Water pipes connection to the tank
(heating coil pipes)
Perform the flexible water pipes connection between indoor unit
and domestic hot water tank (Tank connections) as follows:

Connection procedure
The two heating coil pipes which had been connected to the in-
door unit must be connected to the tank:
1 The pipe connected to the 3-way valve must be connected to
the heating coil inlet connection of the tank.
2 The pipe connected to the T-branch must be connected to the
heating coil outlet connection of the tank.
1)
(Left side view)
7.4.10 Water pipes connection to the DHW
installation (DHW pipes)
The two flexible water pipes which had been connected to the
tank (DHW inlet and outlet connections) must be connected to
the DHW installation.
I M P O R TA N T N O T E
• Do not forget installing the pressure and temperature relief
valve accessory (DHWT-SWG-01) at the DHW inlet connec-
tion of the tank (as close as possible to the tank) to provide
the following functions.
- Pressure protection
- Non-return function
- Shut-off valve
- Filling
- Draining
If not, an specific device for each function should be installed.
• Install also a shut-off valve (field supplied) in the DHW outlet
connection, in order to make easier any maintenance work.
For more details, refer to the section
2)
DHW hydraulic circuit.