Trane CGAX/CXAX, Руководство пользователя

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CG-PRC026C-GB
48
Mechanical Specifications
General
Chiller is designed for outdoor application strictly in
accordance with specifi cations and it will be shipped
with a full operating charge of R410A refrigerant
and lubrication oil scroll compressors and electronic
expansion valve.
Quality assurance
Chiller is designed and manufactured under a quality
assurance system and enviromental management
system certifi ed in accordance with standard ISO
9001:2008 and ISO14001.
All chillers follow a production quality plan to ensure
proper construction and operation including electrical
sequence running test.
Unit construction is in accordance with the following
European directives:
• Machinery Directive (MD) 2006/42/CE
• Low Voltage Directive (LV) 2006/95/CE
•
ElectroMagnetic Compatibility Directive (EMC)
2004/108/CE
• Electrical Machinery Safety Standard EN 60204-1
Construction characteristics
Chiller casing and electrical panels are made of
galvanized steel of 1.5 mm thickness mounted on a
riveted structural steel entirely painted base. Unit panels
frames and exposed steel surfaces are painted and have
a corrosion resistance of 1500 hours to salt spray test
according ISO 9227. Electrical panel israted as minimum.
IP54 fully factory mounted and wired with access door
clearly visible from outside with power on/off indication.
Compressors and Motors
Chiller are provided with hermetic Scroll compressors:
• Direct drive 2900 rpm
• Suction gas cooled hermetic motor
• Built-in centrifugal oil pump
• Built-in oil level sight glass and oil charging valve
Compressor motors have a voltage utilization range
of ± 10% on nameplate voltage internal temperature
and current-sensitive motor overload is included for
maximum protection.
Evaporator
The evaporator is a single brazed plate heat exchanger
made of stainless steel 316 L and copper brazing
designed to operate properly and effi ciently with a
refrigerant charge.
Maximum operating pressure on water side does not
exceed 1MPa. The evaporator is fully insulated with
appropriate thickness and close cell type insulation
protected against freezing either with a control activated
heater either with a pump activation sequence whenever
the ambient temperature will be below 3°C. It has only
one entering and only one leaving water connection.
Chiller is able to supply water temperature leaving the
evaporator:
• For comfort application: between 5°C / 20°C
• For process application:
o Between -12°C and 5°C on cooling only units
(CGAX)
o Between -10°C and 5°C on heat pump units (CXAX)
Condenser coil and fans
Ambient temperature operating map is as minimum:
• Cooling only: 5°C (-18°C with Low Ambient Option) up
to 46°C
• Heating mode: -15°C up to 20°C
Cooling-only units coils
Condenser coil is Microchannel type made in aluminum
brazed fi n construction; coils will consist of three main
components: fl at microchannel tube fi ns in between
the microchannel tubes and two refrigerant manifolds.
Coil are cleanable using a high pressure water stream.
Condenser coil includes an integral subcooling circuit.
An option for E-coating or complete coil coating shall be
available.
Heat pump units coils
Condenser coil is made of aluminum fi ns mechanically
bonded to seamless copper tubing and includes integral
subcooling circuit. Coils are factory leak tested at
3.2Mpa under water. If unit will be installed on corrosive
environment aluminum fi ns are pre-coated with epoxy
with minimum thickness of 8µm in order to withstand
1000 hours of salt spray test according ISO 9227.
Chillers are equipped with axial condenser fan and
motors with permanently lubricated ball bearings and
external overload protection shall be provided. Fans
motors are class F. powered through an IP55 electrical
box.
Refrigerant Circuit
Each refrigerant circuit includes compressor(s) high
and low pressure transducer permanent liquid fi lter
drier electronic expansion valve pressure port on each
refrigerant line full operating charge of R410A and POE
oil as long as high pressure side pressostat.
Oil Management
The chiller is equipped with an oil management system
consisting of an oil pump integrated on the compressor
to ensure proper oil circulation throughout the unit and
a crankase heater integrated in the compressor to avoid
startup with low oil temperature. Unit is delivered with
operating oil charge factory supplied and checked (Trane
recommended oil OIL 0057E or OIL 0058E).