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1. GENERAL INFORMATION
No part of this publication may be reproduced, copied,
filed or transmitted in any shape or form without the
permission of Johnson Controls-Hitachi Air Conditioning
Spain, S.A.U.
Within the policy of continuous improvement of its
products, Johnson Controls-Hitachi Air Conditioning
Spain, S.A.U. reserves the right to make changes at
any time without prior notification and without being
compelled to introducing them into products previously
sold. This document may therefore have been subject to
amendments during the life of the product.
Hitachi makes every effort to offer correct, up-to-date
documentation. Despite this, printing errors cannot be
controlled by Hitachi and are not its responsibility.
As a result, some of the images or data used to illustrate
this document may not refer to specific models. No
claims will be accepted based on the data, illustrations
and descriptions included in this manual.
2. SAFETY
2.1 Applied symbols
During normal heat pump system design work or unit
installation, greater attention must be paid in certain
situations requiring particular care in order to avoid
damage to the unit, the installation or the building or
property.
Situations that pose a risk to the safety of those in the
surrounding area or to the unit itself are clearly indicated
in this manual.
A series of special symbols are used to clearly identify
these situations.
Pay close attention to these symbols and to the messages
following them, as your safety and that of others depends
on it.
!
DANGER
• The text following this symbol contains information and
instructions relating directly to your safety, in addition to
hazards or unsafe practices which could result in severe
personal injuries or death.
• Not taking these instructions into account could lead to serious,
very serious or even fatal injuries to you and others in the
proximities of the unit.
In the texts following the danger symbol you can also find
information on safety procedures during unit installation.
!
CAUTION
• The text following this symbol contains information and
instructions relating directly to your safety, in addition to hazards
or unsafe practices which could result in minor personal injury or
product or property damage.
• Not taking these instructions into account could lead to minor
injuries to you and others.
• Not taking these instructions into account could lead to unit
damage.
In the texts following the caution symbol you can also find
information on safety procedures during unit installation.
PMML0666 rev.0 - 09/2024 - 1000017439
NOTE
• The text following this symbol contains information or
instructions that may be of use or that require a more thorough
explanation.
• Instructions regarding inspections to be made on unit parts or
systems may also be included.
2.2 Additional information about safety
!
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.
• Do not pour water over the indoor unit electrical parts. If the
electrical components are in contact with water a seri ous
electrical shock will take place.
• Do not touch or adjust the safety devices inside the air to water
heat pump. If these devices are touched or adjusted, a serious
accident can take place.
• Do not open the service cover or access inside the air to water
heat pump without disconnecting the main power supply.
• In case of fire Turn OFF the main switch, put out the fire at once
and contact your service contractor.
• It must ensure that the air to water heat pump cannot op erate
accidentally without water neither with air inside hydraulic
system.
!
CAUTION
• Do not use any sprays such as insecticide, lacquer, hair spray or
other flammable gases within approximately one meter from
the system.
• If installation circuit breaker or the unit fuse is often activated,
stop the system and contact your service contractor.
• Do not make service or inspections tasks by yourself. This work
must be performed by a qualified service person.
• This appliance must be used only by adult and capable people,
having received the technical information or instructions to
handle this appliance properly and safely.
• Children should be supervised to ensure that they do not play
with the appliance.
• Do not let any foreign body into the water inlet and outlet piping
of the air to water heat pump.
2.3 Important notice
• The supplementary information and ErP data 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 THROUGH 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
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