Refrigerant And Water Piping - Hitachi YUTAKI S80 Serie Manuel D'instructions

REFRIGERANT AND WATER PIPING

4 REFRIGERANT AND WATER PIPING
4.1 SPACE HEATING AND DHW
!
D A N G E R
Do not connect the power supply to the indoor unit prior to filling the space heating and DHW circuit with water and checking water pressure
and the total absence of any water leakage.
4.1.1 Additional hydraulic necessary elements for DHW

TYPE 2: Version for operation with Hitachi DHW tank
DHW tank integrated
above the indoor unit
DHW tank beside the
indoor unit
When installing the YUTAKI S80 indoor unit TYPE 2 (RWH-(4.0-6.0)(V)NFWE) in combination with the Hitachi DHW tank
(DHWS(200/260)S-2.7H2E) the following elements to provide DHW operation are needed:
• 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.
6 PMML0344B rev.2 - 01/2021
Type Nº
1 Water inlet (Space heating)
2 Water outlet (Space heating)
3 Heating coil inlet
Piping
connections
4 Heating coil outlet
5 Water inlet (DHW)
6 Water outlet (DHW)
7 Shut-off valve (factory-supplied)
Factory supplied 8 3-way valve
9 T-branch
Domestic hot water tank
10
(DHWS(200/260)S-2.7H2E accessory)
11 Heating coil pipes
Accessories Flexible water pipe kit
(ATW-FWP-02 accessory)
12
12a
12b
Water pipes between indoor unit and
Field supplied 13
DHW tank
Part name
Indoor unit pipes
DHW tank pipes