Important Notice - Hitachi Ras-1.5Whvrp2E Bedienungsanleitung

• Do not make service or inspections tasks by yourself. This works
must be performed by qualified service person.
• Do not put any strange material (sticks, etc...) into the air inlet
and outlet. These units have high speed rotating fans and it is
dangerous that any object touches them.
• Refrigerant leakage can cause difficulty with breathing due to
insufficient air.
• This appliance must be used only by adult and capable people,
having received the technical information or instructions to
handle properly and safely this appliance.
• Children should be supervised to ensure that they do not play
with the appliance.

2.4 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
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 continuing improvement
in design and performance of products. The right
is therefore reserved to vary specifications 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 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 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.
EN
PMML0640 rev.2 - 11/2024 - 1000019628
!
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 system from an abnormal pressure, a high pressure switch,
which needs no field adjustment, is utilized in the refrigeration
system. Therefore, this heat pump is protected from abnormal
pressures. However, if abnormally high pressure is applied to the
refrigeration cycle including the high pressure vessel(s), it will
result in serious injury or death due to explosion of the pressure
vessel. Do not apply a pressure higher than the following pressure
to the system, by modifying or changing the high pressure switch.
!
CAUTION
This unit is designed for commercial and light industrial application.
If installed in house hold appliance, it could cause electromagnetic
interference.
!
DANGER
• Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously
operating ignition sources (for example: open flames, an
operating gas appliance or an operating electric heater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
Start-up and Operation: Check to ensure that all the stop
valves are fully opened and no obstacle exists at the inlet/
outlet sides before start-up and during the operation.
Maintenance: Periodically check the high pressure side
pressure. If the pressure is higher than the maximum
allowable pressure, stop the system and clean the heat
exchanger or remove the cause.
Maximum allowable pressure and high pressure cut-out
value:
Maximun
Refrigerant allowable
pressure (MPa)
R32 4.15

NOTE
The label for the vessel under PED are attached on the high pressure
vessel. The pressure vessel capacity and vessel category are
indicated on the vessel.
Location of High Pressure Switch
Compressor

NOTE
The high pressure switch is indicated on the electrical wiring
diagram in the outdoor unit as HPS connected to printed circuit
board (PCB1) in the outdoor unit.
High pressure
switch cut-out
value (MPa)
4.00 ~ 4.10
2