2.2 ADDITIONAL INFORMATION ABOUT SAFETY
! DANGER
• Do not pour water into the indoor or outdoor unit. These
products are equipped with electrical parts. Ifwater contacts
withelectricalcomponentsthenitwillcauseaseriouselectrical
shock.
• Do not touch or adjust safety devices inside the indoor or
outdoorunits.Ifthesedevicesaretouchedoradjusted,itmay
causeaseriousaccident.
• Donotopentheservicecoveroraccesstheindoororoutdoor
unitswithoutdisconnectingthemainpowersupply.
• IncaseofreTurnOFFthemainswitch,putoutthereatonce
andcontactyourservicecontractor.
! CAUTION
• Do not use anysprays such as insecticide, lacquer, hair spray or
otherammablegaseswithinapproximatelyone(1)meterfromthe
system.
• If circuit breaker or fuse is often activated, stop the system and
contactyourservicecontractor.
• Donotmakeserviceorinspectionstasksbyyourself.Thisworkmust
beperformedbyaqualiedserviceperson.
• Donotputanystrangematerial(sticks,etc...)intotheairinletand
outlet.Theseunitshavehighspeedrotatingfansanditisdangerous
thatanyobjecttouchesthem.
• Refrigerant leakage can cause difculty with breathing due to
insufcientair.
• This appliance must be used only by adult and capable people,
having received thetechnical information or instructions to handle
properlyandsafelythisappliance.
• Childrenshouldbesupervisedtoensurethattheydonotplaywith
theappliance.
? NOTE
Itisrecommendedtoventilatetheroomevery3or4hours.
3 IMPORTANT NOTICE
• The supplementary information about the purchased
products is supplied in a CD-ROM, which can be found
bundled with the indoor unit. In case that the CD-ROM is
missing or it is not readable, please contact your HITACHI
dealer or distributor.
• PLEASE READ THE MANUAL AND THE FILES ON THE
CD-ROM CAREFULLY BEFORE STARTING WORK ON
THE INSTALLATION OF THE SYSTEM. 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 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 continuing improvement in
design and performance of products. The right is therefore
reserved to vary specications without notice.
• HITACHI cannot anticipate every possible circumstance that
might involve a potential hazard.
• This outdoor unit has not been designed for industrial
processes, and it’s use as heat pump is limited to the
scope of application of the YUTAKI Series. For use in other
applications, please contact your HITACHI dealer or service
contractor.
• No part of this manual may be reproduced without written
permission.
• If you have any questions, contact your service contractor of
HITACHI.
• This manual should be considered as a permanent part
of the heat pump system. This manual gives a common
description and information for this heat pump which you
operate as well as for other models.
• Check and make sure that the explanations of each part of
this manual correspond to your heat pump model.
• Refer to the models codication to conrm the main
characteristics of your system.
• Signal words (NOTE, DANGER and CAUTION) are used
to identify levels of hazard seriousness. Denitions for
identifying hazard levels are provided below with their
respective signal words.
• This outdoor unit is exclusively to use for air to water
systems. It can not be used with indoor units in air to air
systems.
! DANGER
Pressure Vessel and Safety Device: This heat pump is equipped
with a high pressure vessel under PED (Pressure Equipment
Directive). The pressure vessel has been designed and tested
before shipment according to PED. Also, in order to prevent the
systemfromanabnormalpressure,ahighpressureswitch,which
needs no eld adjustment, is utilized in the refrigeration system.
Therefore, thisheat pump isprotected from abnormal pressures.
However,ifabnormallyhighpressureisappliedtotherefrigeration
cycleincludingthehighpressurevessel(s),itwillresultinserious
injuryordeathduetoexplosionofthepressurevessel.Donotapply
a pressure higher than the following pressure to the system, by
modifyingorchangingthehighpressureswitch.
! CAUTION
This unit is designed for commercial and light industrial application.
If installed in house hold appliance, it could cause electromagnetic
interference.
Important notice
PMML0372B rev.5 - 01/2021
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