General
This series of air cooled water chillers consists of various models covering capacities from 52.7 up to 703 Kw. It is the end result of a thorough study, and accurate design by experienced American Breeze research and development teams, to develop a small size chiller series with compact shape, high performance, and reliability of the highest quality standards.
Casing
All units use metal parts that are fabricated from heavy gauge galvanized steel
sheets, formed to ensure maximum rigidity that guarantees and preserves the
units operation during the years. These are degreased, phosphatised, and electro
statically powder coated with an epoxy-polyester RAL 9002 coating of a thickness
of 60-70mu. This fully automatic process ensures superior corrosion resistance
against the most aggressive ambient conditions. The treatment can successfully
withstand a salt spray test of 500 hours, according to ASTM B-117. All
components are assembled together using bolts thus avoiding the need for welding
which may harm the galvanization of the steel.
Compressor
All units use low-noise, maintenance free, and hermetic scroll compressor or scroll type with low vibration levels, specially optimized for use with R22 refrigerant. They have been equipped with a crankcase electrical heater for the oil, and are internally protected against potential overheating or electrical spikes.
Hydraulic kit
All units are equipped, as standard, with a complete hydraulic kit comprising of
a circulating pump, buffer and expansion tank, automatic fill and make up, water
valve with manometer, safety valve, air vent, water filter, differential water
pressure switch and evacuation pump.
Condenser Coil
All units heat exchangers are manufactured from high quality inner grooved copper tubes
according to ASTM B-280, with an outside diameter of 9,52mm (3/8”). The fins are manufactured from aluminium and form the secondary extended heat transfer surface. Alternative fin materials are available upon request such as epoxy-coated aluminium and copper for applications in especially aggressive environments.
Evaporator
All units are equipped with water-refrigerant plate heat exchanger, selected from world class manufacturers. It is made of stainless steel plates (AISI 3161.4401) specially formed to achieve a large heat transfer surface and assembled by means of an automatic brazing process.
Condenser fans
All unit fans are of the axial type, single phase, 6 poles internally protected
against potential overheating, silent and suitable for outdoor installation.
Microprocessor controller
All units are equipped with a sophisticated controller that combines
intelligence with operating simplicity. The controller constantly monitors all
machine parameters including the following:
- Automatic compressor control function through return water temperature.
- Continuous fan speed control based on coil heat exchanger temperature.
- Defrost control (H/P version).
- Hydronic circuit pump control.
- Compressor start up time delay function.
- Compressor running time records.
- Over 150 programmable parameters.
- Fan motor overload protection.
- Auto diagnostic function and digital display of approximately 30 possible error codes including thermistor faults.
- Digital displays of inlet / outlet as well as condensing temperatures of each circuit.
- Remote Cool / Heat selector switch.
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