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continuous control between 30% and 100% of full load.
8.1.1 - Oil filter
The 06T screw compressor has an independent oil filter attached to the oil separator. This filter is field replaceable.
8.1.2 - Refrigerant
The 30XQ air-cooled heat pump chiller operating only with refrigerant R-134a.
8.1.3 - Lubricant
The 06T screw compressor is approved for use with the following lubricant CARRIER MATERIAL SPEC PP 47-32.
8.1.4 - Oil supply solenoid valve
An oil supply solenoid valve is installed on the oil return line as standard to isolate the compressor from oil flow
when the compressor is not operating. The oil solenoid valve is field replaceable.
8.1.5 - Suction and economizer screens
To increase the reliability of the compressor, a screen has been incorporated as a standard feature into suction and
economizer inlets of the compressor.
8.1.6 - Capacity control system
The 06T screw compressor has an unloading system that is standard on all compressors. This unloading system
consists of slide valve that permits changing the length of the screw used for the refrigerant compression. This valve is
controlled by the action of a piston controlled by two solenoid valves on the oil return line.
8.2 - Pressure vessels
General
Monitoring during operation, re-qualification, re-testing and re-testing dispensation:
• Follow the regulations on monitoring pressure equipment.
• It is normally required that the user or operator sets up and maintains a monitoring and maintenance file.
• Follow the control program of EN 378-2, annexes A, B, C and D.
• If they exist follow local professional recommendations.
• 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.
• 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.
• Filter the heat exchange fluid check and carry out internal inspections as described in EN 378-2, annex C.
• In case of re-testing please refer to the maximum operating pressure given on the unit nameplate.
• The reports of periodical checks by the user or operator must be included in the supervision and maintenance
file.
Repair
Any repair or modification, including the replacement of moving parts:
• must follow local regulations and be made by qualified operators and in accordance with qualified procedures,
including changing the heat exchanger tubes.
• 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.
• An indication of any modification or repair must be shown in the monitoring and maintenance file.
Recycling
The unit is wholly or partly recyclable. After use it contains refrigerant vapors and oil residue. It is coated by paint.
Operating life
This unit is designed for:
• prolonged storage of 15 years under nitrogen charge with a temperature difference of 20 K per day.
Carrier Yileng - Shanghai, China
38
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