Test And Check - Hitachi YUTAKI S Series Installation And Operation Manual

4 Fix the indoor unit service cover using the screw which had been previously removed during the
unpacking procedure.
(x2) Both sides
7.1.1 Test and check
Finally, test and check the following items:
• Water leakage
• Refrigerant leakage
7
• Electrical connection
• ...

NOTE
Please refer to the chapters of "5.2.3 Refrigerant charge", "5.3.3.1 Water filling" and "Commissioning"
in this document and refer the Outdoor unit Installation and Operation manual for the specific details
about refrigerant charge tasks.
!
DANGER
Do not connect the power supply to the indoor unit prior to filling 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.
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PMEN0643 rev.0 - 04/2023