Important Notice - Hitachi RAS-3HVRNS3 Installation And Operation Manual

4

Important notice

4 IMPORTANT NOTICE
• 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 air conditioner has been designed for standard air condi-
tioning for human beings. For use in other applications, plea-
se contact your HITACHI dealer or service contractor.
• No part of this manual may be reproduced without written per-
mission.
• If you have any questions, contact your service contractor of
HITACHI.
• This manual should be considered as a permanent part of the
air conditioner. This manual gives a common description and
information for this air conditioner 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 air conditioner model.
• Refer to the models codification to confirm the main characte-
ristics of your system.
• Signal words (DANGER, WARNING and CAUTION) are used
to identify levels of hazard seriousness. Definitions for iden-
tifying hazard levels are provided below with their respective
signal words.
• It is assumed that this unit will be operated and serviced by
English speaking people. If this is not the case, the customer
should add safety, caution and operating signs in the native
language of the personal.
• This air conditioner has been designed for the following tem-
perature. Operate the air conditioner within this range:
Indoor 32°C DB/23°C WB 21°C DB/15°C WB
Cooling mode
Outdoor
Indoor
Heating mode
Outdoor
DB: Dry Bulb Temperature
WB: Wet Bulb Temperature
• These operations modes are controlled by the remote control
switch.
Maximum allowable pressure and high pressure cut-out value:
Outdoor unit model
RAS-2HVNP1
RAS-2.5HVNP1
RAS-3HVNC1
RAS-3HVRNS3
3 PMML0318A - P5415337
Temperature
Maximum Minimum
46°C DB (*) -5°C DB
27°C DB 15°C DB
15°C WB -20°C WB
(*) 43ºC RAS-3HVRNS3
Refrigerant
R410A
R410A
R410A
D A N G E R
Pressure Vessel and Safety Device: This air conditio-
ner 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 abnor-
mal pressure, a high pressure switch, which needs no
field adjustment, is utilized in the refrigeration system.
Therefore, this air conditioner 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.
C A U T I O N
This unit is designed for commercial and light industrial applica-
tion. If installed in house hold appliance, it could cause electro-
magnetic interference.
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 pressu-
re. If the pressure is higher than the maximum allowable pressu-
re, stop the system and clean the heat exchanger or remove the
cause.
Maximun allowable High pressure switch cut-out
pressure (MPa)
4.15
4.15
4.15
value (MPa)
4.00 ~ 4.10
4.00 ~ 4.10
4.00 ~ 4.10