Hitachi RWH-4.0NFE, Руководство по установке и эксплуатации

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6.7.2 YUTAKI S COMBI
!
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.
6.7.2.1 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-down 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-down valve (field supplied) (5) must be connected to the water
filling point when filling the indoor unit. The check valve acts as a safety device to protect the installation against back pressure,
back flow and back syphon of non-potable water into drinking water supply net.
6.7.2.2 Additional hydraulic necessary elements for DHW
YUTAKI S COMBI is factory-supplied ready for DHW operation (Fitted with DHW tank and 3-way valve). Only the following elements
are required in the DHW circuit:
REFRIGERANT AND WATER PIPING
PMML0575 rev.2 - 03/2022 66