ENGLISH
6.7 SPACE HEATING AND DHW
6.7.1 YUTAKI S AND YUTAKI M
! DANGER
Do not connect the power supply to the indoor unit prior to lling the space heating circuit (and DHW circuit if it were the case) with water
and checking water pressure and the total absence of any water leakage.
6.7.1.1 Additional hydraulic necessary elements for space heating
Nature No. Part name
Piping connections
1 Water inlet (Space heating)
2 Water outlet (Space heating)
Factory supplied 3 Shut-off valve (factory-supplied)
Accessories 4
Water check valve
(ATW-WCV-01 accessory)
Field supplied 5 Shut-off valve
The following hydraulic elements are necessary to correctly perform the space heating water circuit:
• Two shut-off valves (factory supplied accessory) (3) must be installed in the indoor unit. One at the water inlet connection (1)
and the other at the water outlet connection (2) in order to make easier any maintenance work.
• A water check valve (ATW-WCV-01 accessory) (4) with 1 shut-off valve (eld supplied) (5) must be connected to the water
lling point when lling the indoor unit. The check valve acts as a safety device to protect the installation against back pressure,
back ow and back syphon of non-potable water into drinking water supply net.
Additional hydraulic necessary elements for DHW
REFRIGERANT AND WATER PIPING
PMML0575 rev.2 - 03/2022
63
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