CIAT Ereba He Series, Instruction Manual

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EN-73
EREBA He
4 - OPERATION
4.3.2 - Compressors
EREBA He units use hermetic rotary
compressor. It is driven by a variable
frequency drive (VFD). The rotary compressor
incorporates an oil coil heating inside the
shell.
The compressor sub-assembly is complete
with:
● Anti-vibration mountings between the
unit and the compressor chassis.
● A compressor case thermostat control at
the discharge of compressor.
The compressors installed in these units
have a specific oil charge.
NOTE: Do not use refrigerants and lubricant
besides those specified. Do not compress
air (there must be no air intake due to
leakage in the refrigeration cycles).
4.3.3 - Air evaporator/condenser
The EREBA He coils are heat exchangers
with internally grooved copper tubes with
aluminium fins.
4.3.4 - Fans
The fans are driven by permanent magnet
synchronous motor. The motors are
managed via a variable frequency drive
(VFD).
According to the Regulation No. 327/2011
implementing Directive 2009/125/EC with
regard to ecodesign requirements for fans
driven by motors with an electric input power
between 125 W and 500 kW.
Product 11 & 15 kW
Overall efficiency % 29,1
Measurement category A
Efficiency category Static
Target efficiency level ERP2015 N(2015) 40
Efficiency level at the optimum efficiency point 40,6
Variable speed drive YES
Year of manufacture See label on the unit
Fan manufacturer
Complast Industrie
SRL
Motor manufacturer Nidec
Fan PN C025223H01
Motor PN B036870H01
Nominal power of the motor kW 0,15
Flow rate m
3
/s 0,84
Pressure at optimum energy efficiency Pa 51
Nominal speed rpm 847
Product 11 & 15 kW
Specific ratio 1,002
Relevant information to facilitate the disassembly,
recycling or removal of the product at the end of
the life
See Maintenance
Manual
Relevant information to minimise the impact on the
environment
See Maintenance
Manual
NOTE : EREBA He 5 and 7 kW units are not
concerned with this table because their
fans have an input power lower than 125 W.
According to the Regulation No. 640/2009 and
amendment 4/2014 implementing Directive
2005/32/EC with regard to ecodesign
requirements for electric motors.
Motor type
Permanent magnet
synchronous motor
Motor included in the application domain of the
regulation 640/2009 & amendment 4/2014
NO
4.3.5 - Pulse Motor Expansion Valve
(PMV)
The PMV is equipped with a stepper motor
(0-500 pulses). The 5 to 15 kW units have
one PMV in its refrigerant circuit.
4.3.6 - Moisture indicator
Located on the liquid line, this indicator
permits monitoring of the unit charge and
indicates moisture in the circuit. The presence
of bubbles in the sight-glass can indicate
an insufficient charge or non-condensables
in the system. The presence of moisture
changes the colour of the indicator paper in
the sight-glass.
4.3.7 - Filter drier
This is a one-piece, brazed filter drier, located
in the liquid line. The role of the filter drier is to
keep the circuit clean and moisture-free. The
moisture indicator shows when it is necessary
to change the filter drier. The filter drier is a
bi-flow device on the EREBA He units that
means that it filters and dehydrates in both
operating modes. The pressure drop is much
higher in the heating mode. A difference in
temperature between the filter inlet and outlet
shows that the element is dirty.