NANO NRC0020-0200 UL, Operating And Maintenance Manual, Page: 4 / 24

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OPERATING AND MAINTENANCE MANUAL
Chapter 1
- General Information
NRC0020-0200 UL
The data in this manual are not binding and may be changed by the manufacturer without notice. Reproduction of this manual, even partial, is strictly prohibited.
C
HAPTER
1
G
ENERAL
I
NFORMATION
The units described in this manual are “dryers”.
They are designed to remove the moisture from a flow of “compressed gas”.
The dryers are equipped with a refrigerant circuit that is designed to cool the compressed air to a temperature designated “pressure dew point”.
Since, in the majority of applications, the gas to be dried is compressed air, hereinafter the term “compressed air” is used for the sake of
simplicity, even though the specific gas in an individual application may be different. Hereinafter the expression “pressure” is used to indicate
relative pressure.
The electrical cabinet is designed in compliance with standard UL508A (Industrial Control Panels), tested and approved to UL file no. E249753,
and bears the appropriate marking .
The following general symbols are to be found on the decals affixed to the unit and also in the dimensional drawings and refrigerant circuit
diagrams in this manual.
The meaning of each symbol is indicated hereinafter:
The following warning symbols are to be found on the decals affixed to the unit.
The meaning of each symbol is indicated below:
SYMBOL DESCRIPTION SYMBOL DESCRIPTION
Unit air inlet Unit air outlet
Condensate drain
Flow of cooling air (air-cooled
models)
Direction of fan rotation (air-cooled
models)
Direction of flow of refrigerant gas
Prohibition of using inserting lift
truck forks to handle the unit in the
point where the symbol appears
Indication of the axis to refer to in unit
lifting operations
WARNING SYMBOL DESCRIPTION WARNING SYMBOL DESCRIPTION
To maintain overcurrent,
short-circuit, and ground-
fault protection, the
manufacturer’s instructions
for selection of overload and
short circuit protection must
be followed to reduce the
risk of fire or electric shock.
If an overload or a fault
current interruption occurs,
circuits must be checked to
determine the cause of the
interruption.
If a fault condition exists, the
current-carrying components
should be examined and
replaced if damaged, and the
integral current sensors must
be replaced to reduce the risk
of fire or electric shock.
Hazardous voltage.
All doors must be closed
before energizing the panel.