Hitachi YUTAKI S80 R410A Series Installation And Operation Manual page 38

Heating coil pipes (Factory-supplied with the DHW tank accessory
(DHWS(200/260)S-2.7H2E(-W)))
The domestic hot water tank accessory for combination with YUTAKI S80 indoor unit is factory-
supplied with two flexible water pipes for the connection between the indoor unit and the heating
coil of the domestic hot water tank, when the DHW tank is installed integrated above the indoor unit.
Item
200 mm
(1")
(x2)
Flexible water pipe kit (ATW-FWP-02) - For domestic hot water tank installed beside the
indoor unit
For DHW tank beside the indoor unit (both right or left side), the heating coil pipes factory-
supplied with the DHW tank accessory are not required. In this case, the dedicated Hitachi flexible
water pipe kit (ATW-FWP-02 accessory) is needed. This kit is provided with the following items:
✓ 4 flexible water pipes:
2 pipes to connect to the indoor unit (3-way valve and T-branch)
◉
2 pipes to connect to the heating coil inlet/outlet connections of the DHW tank accessory
◉
(DHWS(200/260)S-2.7H2E(-W)).
✓ 9 gaskets (2 gaskets for each flexible water pipe end and 1 spare gasket).
✓ 3 extension cables (1 for the tank's electric heater, 1 for the tank's thermistor and 1 for the
unit controller).
Flexible water
pipes
Gaskets
It is necessary to identify the function of each water pipe.
Item
~500 mm
~400 mm
Item
360 mm
(1")
(x2)
PMEN0648 rev.0 - 03/2023
Heating coil pipes
One pipe for the connection between 3-way valve connection and heating coil
inlet connection of the tank.
(1")
The other one for the connection between T-branch connection and heating coil
outlet connection of the tank.
Heating coil pipes for the indoor unit
To connect to the 3-way valve heating coil inlet connection.
To connect to the T-branch heating coil outlet connection.
Heating coil pipes for the DHW tank accessory
One pipe to connect to the heating coil inlet connection of the
tank accessory.
(1")
The other one to connect to the heating coil outlet connection
of the tank accessory.
Connection
Extension
cables
Connection
Connection
5
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