Midea LSBLG255/MZ, Техническое и сервисное руководство

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DX type water-cooled screw chiller (PCB Control) MCAC-CTSM-2014-03
20
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Lubricant:
The lubricant is supplied automatically by pressure difference inside the compressor. It is unnecessary to
add an extra lubricant pump.
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The Oil Separator comes from MANN of Germany and has reliable qualification. The oil content can
be controlled below 3ppm (the oil content treated by oil-gas separator of common like screw-type air
compressor is no less than 8-10ppm). The oil-gas separator amount is double of same kind of other
products. The large oil filtering area reduces refrigerant flux speed, and has better separating affect and
long lifespan by the secondary reflux technology adopted.
6.2 Pressure vessels
6.2.1 General
Monitoring during operation, re-qualification, re-testing and re-testing dispensation:
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Follow the regulations on monitoring pressurized equipment.
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It is normally required that the user or operator sets up and maintains a monitoring and maintenance
file.
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Follow the control programs.
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If they exist follow local professional recommendations.
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Regularly inspect the condition of the coating (paint) to detect blistering resulting from corrosion. To
do this, check a non-insulated section of the container or the rust formation at the insulation joints.
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Regularly check for possible presence of impurities (e.g. silicon grains) in the heat exchange fluids.
These impurities maybe the cause of the wear or corrosion by puncture
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Filter the heat exchange fluid check and carry out internal inspections as described in EN 378-2.
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In case of re-testing please refer to the maximum operating pressure given on the unit nameplate.
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The reports of periodical checks by the user or operator must be included in the supervision and
maintenance file.
6.2.2 Repair
Any repair or modification, including the replacement of moving parts:
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Must follow local regulations and be made by qualified operators and in accordance with qualified
procedures, including changing the heat exchanger tubes.
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Must be made in accordance with the instructions of the original manufacturer. Repair and
modification that necessitate permanent assembly (soldering, welding, expanding etc.) must be made
using the correct procedures and by qualified operators.
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An indication of any modification or repair must be shown in the monitoring and maintenance file.
6.2.3 Corrosion allowances:
Gas side: 0 mm
Heat exchange fluid side: 1 mm for tubular plates in lightly alloyed steels, 0 mm for stainless steel plates
or plates with copper-nickel or stainless steel protection.
6.2.4 Operating life
The evaporator and condenser are designed for: prolonged usage of 20 years for high-quality materials.
6.2.5 Security