TYPE 2: Version for operation with HITACHI DHW tank
Nature
Nº
Part name
Piping
connections
1 Water inlet (Space heating)
2 Water outlet (Space heating)
3 Heating coil inlet
4 Heating coil outlet
5 Water inlet (DHW)
6 Water outlet (DHW)
Factory supplied
7 Shut-off valve (factory-supplied)
8 3-way valve
9 T-branch
Accessories
10
Domestic hot water tank
(DHWS(200/260)S-2.7H2E
accessory)
11 Heating coil pipes
12
Flexible water pipe kit
(ATW-FWP-02 accessory)
12a Indoor unit pipes
12b DHW tank pipes
Field supplied
13 Water pipes between indoor unit
and DHW tank
DHW tank integrated
above the indoor unit
DHW tank beside
the indoor unit
The YUTAKI S80 version for combination with DHW tank (RWH-(4.0-6.0)(V)NFWE) needs the following elements to provide DHW
operation:
•
The YUTAKI S80 domestic hot water tank (DHWS(200/260)S-2.7H2E accessory)
(10) is required in combination with YUTAKI
S80 indoor unit. This tank accessory is factory-supplied with two flexible water pipes (11). Respect the following instructions
depending on the DHW tank location (integrated above the indoor unit or beside it).
-
For DHW tank integrated above the indoor unit, use one of the factory-supplied pipes (11) for the connection between 3-way
valve and the heating coil inlet coil of the DHW tank, and the other one for the connection between the T-branch and the
heating coil outlet coil of the DHW tank accessory.
-
For DHW tank beside the indoor unit (both right or left side), the pipes factory-supplied with the DHW tank accessory (11) are
not required. In this case, the dedicated HITACHI flexible water pipe kit (ATW-FWP-02 accessory) (12) is needed. This kit is
provided with the following items:
4 flexible water pipes (Two pipes (12a) to connect to the indoor unit (3-way (8) valve and T-branch (9)) and other two
pipes (12b) to connect to the heating coil inlet/outlet connections of the DHW tank (5-6). To connect the indoor unit with
the DHW tank, two additional field-supplied pipes are required (13).
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).
REFRIGERANT AND WATER PIPING
PMML0340B rev.1 - 03/2016
10