System Description; Before Operation - Hitachi RAS-3FSVNE Betriebshandbuch

3. SYSTEM DESCRIPTION

Long piping for high-rise buildings.
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Various combinations, 7 types and 49 models of indoor
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units type capacity from 4.4 kW to 14.2kW.
Flexibility of indoor unit control.
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High reliability.
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Space saving.
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Easy installation.
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Item
Applicable FSVNE Units:
Maximum Piping Length (Lo-i):
- Actual Length
Height difference between IU and OU (Ho-i):
- Outdoor Unit is higher than Indoor Unit
- Indoor Unit is higher than Outdoor Unit
Height difference between Indoor Units
(Hi-i):

4. BEFORE OPERATION


CAUTION:
− Supply electrical power to the system for
approximately 12 hours before start-up or a long
shutdown. Do not start the system immediately after
power supply, it may cause a compressor failure
because the compressor is not heated well.
− When the system is started after a shutdown longer
that approximately 3 months, it is recommended to
check the system by your service contractor.
(m)
Length
3HP 4/5HP
50 75
25
25
10
− Turn OFF the main switch when the system is to be
− Make sure that the outdoor unit is not covered with
SYSTEM DESCRIPTION
stopped for a long period of time: If the main switch is
not turned OFF, electricity will be used, because the
oil heater is always energised during compressor
stopping.
snow or ice. If covered, remove it by using hot water
(approximately 50°C). If the water temperature is
higher that 50 °C, it will cause damage to plastic
parts.
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