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Hitachi YUTAKI H Combi HWD-WE-220S Manual De Instrucciones página 10

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SERVICE SPACE
2.3
Important notice
• The supplementary information about the purchased
products is available through the QR printed in the
front cover. In case that no access to the website or
files are not readable, please contact your Hitachi
dealer or distributor.
• PLEASE READ THE MANUAL AND DOWNLOADED
FILES THROUGHOUT THE QR CAREFULLY BEFORE
STARTING TO WORK ON THE INSTALLATION. Failure
to observe the instructions for installation, use and
operation described in this documentation may
result in operating failure including potentially
serious faults, or even the destruction of the air to
water heat pump system.
• Verify, in accordance with the manuals which
appear in the outdoor and indoor units, that all the
information required for the correct installation of
the system is included. If this is not the case, contact
your distributor.
• Hitachi pursues a policy of continuous improvement
in product design and performance. The right is
therefore reserved to vary specifications without
notice.
• Hitachi cannot anticipate every possible
circumstance that might involve a potential hazard.
• This air to water heat pump has been designed for
standard water heating for human beings only. Do
not use this for other purposes such as for drying
clothes, heating foods or for any other heating
process (except swimming pool).
• No part of this manual may be reproduced without
written permission.
• If you have any questions, contact your service
contractor of Hitachi.
• Check and make sure that the explanations of each
part of this manual correspond to your air to water
heat pump model.
• Refer to the models codification to confirm the main
characteristics of your system.
• Signal words (NOTE, DANGER and CAUTION) are used
to identify levels of hazard seriousness. Definitions
for identifying hazard levels are provided in initial
pages of this document.
• The operation modes of these units are controlled by
the unit controller.
• This manual should be considered as a permanent
part of the air to water heat pump. It gives a common
description of and information for this air to water
heat pump which you operate as well as for other
models.
• Keep the water temperature of the system above the
freezing temperature.
• Water temperature (max/min): 5 ºC / 60 ºC
• Water pressure (max/min): 1 bar / 3 bar
• This equipment must be connected to the water
main.
• lf the domestic cold water entry pressure is higher
than the equipment's design pressure (10 bar), a
pressure reducer must be fitted with a nominal value
of 7 bar.
EN
PMML0596 rev.0 - 04/2022
3. SERVICE SPACE
Top view
4. ELECTRICAL AND CONTROL SETTINGS
4.1
General check
• Make sure that the following conditions related to
power supply installation are satisfied:
✓ The power capacity of the electrical installation
is large enough to support the power demand of
the YUTAKI system (outdoor unit + indoor unit +
DHW tank).
✓ The power supply voltage is within ±10% of the
rated voltage.
✓ The impedance of the power supply line is low
enough to avoid any voltage drop of more than
15% of the rated voltage.
• Following the Council Directive 2014/30/EU, relating
to electromagnetic compatibility, the table below
indicates the Maximum permitted system impedance
Z
at the interface point of the user's supply, in
max
accordance with EN 61000-3-11.
The status of Harmonics for each model, regarding
compliance with EN 61000-3-12, is as follows:
Front view
Units in mm.
2

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