Important notice
3
PMML0317A rev.1 - 11/2013
ENGLISH
4 IMPORTANT NOTICE
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 pres-
sure. If the pressure is higher than the maximum allowable pres-
sure, stop the system and clean the heat exchanger or remove
the cause.
Maximum Allowable Pressure and High Pressure Cut-out Value:
Outdoor Unit Model Refrigerant
Maximum Allowable
Pressure (MPa)
High Pressure Switch
Cut-out Value (MPa)
RAS-(3-10)H(V)NP(1)E
RAS-(8-10)HNCE
R410A 4.15 4.00 ~ 4.10
RAS-4H(V)RNS3E R410A 4.15 4.00 ~ 4.10
• 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 air conditioner has been designed for standard air condi-
tioning for human beings. For use in other applications, please
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 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 codication to conrm the main charac-
teristics of your system.
• Signal words (DANGER, WARNING and CAUTION) are used
to identify levels of hazard seriousness. Denitions 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:
Temperature
Maximum Minimum
Cooling
Mode
Indoor 32°C DB/23°C WB 21°C DB/15°C WB
Outdoor 46 ºC DB (*) -5 °C DB
Heating
Mode
Indoor 27 °C DB 15 °C DB
Outdoor 15 °C WB -20 °C WB (**)
DB: Dry Bulb Temperature
WB: Wet Bulb Temperature
(*) 43ºC RAS-4H(V)RNS3E
(**) -10ºC RAS-4H(V)RNS3E
• These operations modes are controlled by the remote control
switch.
• 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.
D A N G E R
Pressure Vessel and Safety Device: This air conditioner
is equippedwithahighpressurevesselunderPED(Pres-
sure 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
eld adjustment, is utilized in the refrigeration system.
Therefore, this air conditioner is protected from abnormal
pressures. However, if abnormally high pressure is ap-
pliedto therefrigerationcycleincludingthe highpressure
vessel(s),itwillresultinseriousinjuryordeathduetoexplo-
sionofthepressurevessel.Donotapplyapressurehigher
thanthefollowingpressuretothesystem,bymodifyingor
changingthehighpressureswitch.
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