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)
Accessories
8
Domestic hot water tank
(DHWT-(200/300)S-3.0H2E accessory)
9
3-way valve
(ATW-3WV-01 accessory)
Field supplied
10
T-branch
11
Heating coil pipes
YUTAKI S is not factory-supplied ready for DHW operation, but it can be used for the production of DHW if the following elements
are installed:
• A domestic hot water tank (DHWT-(200/300)S-3.0H2E accessory) (8) has to be installed in combination with the indoor unit.
• A 3-way valve (ATW-3WV-01 accessory) (9) must be connected at one point of the water outlet pipe of the installation.
• A T-branch (eld supplied) (10) must be connected at one point of the water inlet pipe of the installation.
• Two water pipes (eld supplied) (11). One pipe between 3-way valve and the heating coil inlet (3) of the DHW tank, the other
one between the T-branch and the heating coil outlet (4) of the DHW tank.
Additionally, the following elements are required for the DHW circuit:
Nature Nº Part name
Piping connections
1 Water inlet (DHW)
2 Water outlet (DHW)
Field supplied
3
Pressure and temperature relief valve
3a Shut-off valve
3b Water check valve
3c Pressure relief valve
4 Shut-off valve
5 Draining
• 1 Shut-off valve (eld supplied): one shut-off valve (4) must be connected after the DHW outlet connection of the DHW tank (2)
in order to make easier any maintenance work.
• A Security water valve (Field-supplied): this accessory (3) is a pressure and temperature relief valve that must be installed as
near as possible to the DHW inlet connection of the DHW tank (1). It should ensure a correct draining (5) for the discharge valve
of this valve. This security water valve should provide the following:
REFRIGERANT AND WATER PIPING
PMML0575 rev.2 - 03/2022
64
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