Hitachi YUTAKI S80 Serie Manuel D'instructions page 24

INSTALLATION
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N O T E
Use the accessory slotted hole to fix the DHW tank to the wall at the
desired distance.
• Fix the accessory to the wall with field supplied screws.
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Check that the set (indoor unit with integrated tank) is installed totally
vertical.
11 Test and check.
Before assembling the covers, test and check the following
items:
• Water leakage
• Refrigerant leakage
• Electrical connection
• ...
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The following documents must be referred:
• Refer to the chapters "4.1.4 Water filling" and "9 COMMISSIONING"
in this document (Tank)
• Refer to the YUTAKI S80 indoor unit Installation and operation
manual, for the information about the refrigerant charge, water
filling and Commissioning of the indoor unit.
• For the specific details about refrigerant charge tasks refer the
Outdoor unit Installation and Operation manual.
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D A N G E R
DO NOT CONNECT THE POWER SUPPLY TO THE INDOOR UNIT
AND DHW TANK PRIOR TO FILLING BOTH CIRCUITS WITH
WATER AND CHECKING WATER PRESSURE AND THE TOTAL
ABSENCE OF ANY WATER LEAKAGE.
12 Cover's assembly
Finally, reassembly all the cover's removed.
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Safety instructions
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N O T E
Check the requirements and recommendations in the chapter "5 Electrical
and control settings"
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D A N G E R
• Do not connect the power supply to the DHW tank prior to
filling the space heating circuit and DHW circuit with water and
checking water pressure and the total absence of any water
leakage.
• Do not connect or adjust any wiring or connections unless the
main power switch is OFF.
• When using more than one power source, check and ensure that
all of them are turned OFF before operating the unit.
• Wait for 3 minutes after switching off the power of the unit before
any electrical work. This is necessary to ensure the discharge of
internal capacitors in order to avoid electrical shock.
• Check to ensure that the indoor fan (inverter box) and the
outdoor fan have stopped before electrical wiring work or
periodical check is performed.
• Avoid wiring installation in contact with the refrigerant pipes,
water pipes, edges of plates and electrical components inside
the unit to prevent damage, which may cause electric shock or
short circuit.
16 PMML0344B rev.2 - 01/2021
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C A U T I O N
• Use a dedicated power circuit for the DHW tank. Do not use a power
circuit shared with the outdoor unit or any other appliance.
• Make sure that all wiring and protection devices are properly selected,
connected, identified and fixed to the correspond i ng terminals of
the unit, specially the protection (earth) and power wiring, taking
into account the applicable national and local regulations. Establish
proper earthing; Incomplete earthing may cause electrical shock.
• Protect the unit against the entry of small animals (like rodents)
which could damage the drain pipe and any internal wire or any other
electrical part, leading to electric shock or short-circuit.
• Keep a distance between each wiring terminal and attach insulation
tape or sleeve as shown in the figure.
Tape or sleeve
6.3.2 Version with tank next to the indoor unit
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N O T E
Please, try to perform all this procedure following all the steps in the exact
order in which they are presented below.
Installation procedure
1 Water pipes connection to the indoor unit (space heating
pipes).
When installing the tank next to the YUTAKI S80 indoor unit,
the ATW-FWP-02 accessory is required. This accessory is
composed with 3 extension cables for the wiring supplement
and 4 flexible pipes for the connection between the indoor
unit and the DHW tank.
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N O T E
• Pipes are preformed from factory. This pre-bend side should be
connected to the S80 indoor unit.
• When connected to the S80 indoor unit, pre-form the pipes in
order to let the non connected end pointing to the top.
Flexible pipes.
Factory supplied with the
YUTAKI S80 indoor unit