Immergas AUDAX TOP, Инструкция и рекомендации

Страница: 47 / 72

47
4.3.4 Compressors.
The Audax Top 18-21 ErP units use a rotary
hermetic compressor controlled by a variable
frequency drive (VFD). The rotary compressor
has a heater for the oil embedded in the casing.
The compressor is supplied with:
• Anti-vibrating elements between the unit frame
and the compressor frame.
• A high pressure switch or a thermostat embed-
ded in the compressor casing and located on
its discharge side.
The compressors installed on these units have a
specific oil charge.
N.B.: do not use coolants or lubricants in addi-
tion to those specified. Do not compress the air
(there must be no air suction due to any leaks
in the cooling circuits).
4.3.5 Air condenser/evaporator.
The Audax Top 18-21 ErP air coils are heat ex-
changers fitted with copper pipes with internal
groove and aluminium fins.
4.3.6 Fans.
The fans are drive by permanent magnet syn-
chronous motors. The motors are controlled by
a variable frequency drive (VFD).
In compliance with Regulation No. 327/2011
which implements Directive 2009/125/EC re-
lating to the eco design requirements for fans
driven by motors with an electric input between
125 W and 500 kW.
Product
Audax Top 18-
21 ErP
Global efficiency % 29.1
Measurement category A
Efficiency category Static
Desired level of efficiency
for ERP2015
N(2015) 40
Level of efficiency in the
point of optimum
efficiency
40.6
Variable speed YES
Year of manufacture
See label name
on unit
Fans manufacturer
Complast
Industrie SRL
Motors manufacturer Nidec
Fan code C025223H01
Motor code B036870H01
Motor nominal output kW 0.15
Flow rate m3/s 0.84
Pressure with optimum
energy efficiency
Pa 51
Nominal speed rpm 847
Specific coefficient 1.002
Relevant information to
facilitate dismantling,
recycling or removal of
the product at end of life
See
Maintenance
Manual
Relevant information to
minimise impact on the
environment
See
Maintenance
Manual
In compliance with Regulation No. 640/2009 and
amendment 4/2014 which implements Directive
2005/32/EC relating to the eco design require-
ments for electric motors.
Type of motor
Permanent magnet
synchronous motor
Motor included in the field
of application of Regulation
640/2009 and subsequent
amendment of 4/2014
NO
4.3.7 Modulating Expansion Valve (PMV).
Each PMV is fitted with step-by-step motor
(0-500 pulses). The 18 kW units have one PMV,
while the 21kW units have two PMV connected
in parallel.
4.3.8 Liquid light.
Located on the liquid duct, this indicator moni-
tors the unit charge and the presence of humidity
in the circuit. The presence of bubbles in the
sight glass could mean an insufficient charge or
non-condensable products in the system. The
presence of humidity changes the colour of the
indicator paper inside the sight glass.
4.3.9 Dryer filter.
It is a one-piece brazed dryer filter, located in
the liquid duct. The task of the dryer filter is to
maintain the circuit free from impurities and any
trace of humidity. The liquid light indicates the
need to replace the dryer filter. The dryer filter is
a bi-flow device present on the units. This means
that it filters and dehydrates in both operating
modes. The head loss is much more conspicuous
in the Heat Mode. Each noticeable temperature
difference between the coolant inlet and outlet
connections, indicates that the cartridge must be
replaced because clogged.
4.3.10 Water condenser/evaporator.
The evaporator/condenser is a plate heat ex-
changer. The hydraulic connection of the heat
exchanger is threaded. It has a 6 to 13 mm thick
polyurethane foam thermal insulation and
includes, as standard accessory, an antifreeze
protection.
The products which can be integrated for the
thermal insulation of vessels during connection
of the water pipes, must be chemically neutral
with respect to the material and coatings for
which they are used. This principle also ap-
plies to the products originally supplied by the
manufacturer.
NOTE - Monitoring during operation:
• Follow the regulations on the monitoring of
under pressure equipment.
• The user or operator are usually required to
keep a monitoring and maintenance file.
• In the absence of specific regulations or even
only to integrate them, follow the control
programs provided by EN 378 or ISO 5149.
• Follow the professional recommendations, if
any, applicable to the specific context.
• Regularly check the possible presence of im-
purities (e.g. silicone particles) in the fluids
for heat exchange. Such impurities may cause
wear or pitting corrosion.
• Reports on periodical checks to be prepared
by the user or operator must be attached to
the monitoring and maintenance file.
4.3.11 Coolant.
The Audax Top 18-21 ErP units work with R-
410A coolant.
4.3.12 High pressure switch.
The Audax Top 18-21 ErP units are equipped
with automatic reset safety pressure switches
positioned on the high pressure side. For the
alarms recognition procedure, see Par. 3.9
“Alarms description”.
4.3.13 Receiver.
The Audax Top 18-21 ErP units are equipped
with mechanically welded storage tanks, in which
any coolant excess is deposited when the unit
works in Heat Mode.
4.3.14 Four-way valve.
For the Audax Top 18-21 ErP units, this device
allows reversing the cooling cycle to allow op-
eration in Cool Mode, Heat Mode and during
defrosting cycles.
4.3.15 Inverter sub-group of compressors
and fans.
The Audax Top 18-21 ErP units are equipped
with inverter modules that control the motors
of compressors and fans.
4.3.16 Storage tank
The Audax Top 18-21 ErP units are provided
with storage tank inside the intake duct of the
compressors, which prevents the liquid from
being channelled in the compressors, especially
during defrosting and transient operations.