Sample Selection Sheet - Midea LSBLG MCF Series Technical & Service Manual

MCAC-CTSM-2018-1

4. Sample selection sheet

Part 1 — General
1.01 SYSTEM DESCRIPTION
Microprocessor-controlled liquid chiller shall use a semi-hermetic Screw compressor using refrigerant
HFC-134a.
1.02 QUALITY ASSURANCE
A. Chiller performance shall be rated in accordance with AHRI Standard 550/590, latest edition.
B. Each compressor assembly shall undergo a mechanical run-in test to verify vibration levels, oil pressures,
and temperatures are within acceptable limits. Each compressor assembly shall be proof tested at a
minimum 498 psig (3,432 kPa).
C. Entire chiller assembly shall be proof tested at 181 psig (1,250 kPa) and leak tested at 167 psig (1,150
kPa) with a tracer gas mixture on the refrigerant side. The water side of each heat exchanger shall be
hydrostatically tested at 1.25 times rated working pressure.
D. Prior to shipment, the chiller automated controls test shall be executed to check for proper wiring and
ensure correct controls operation.
E. Unit-mounted compressor motor starter or VFD (variable frequency drive) shall be factory wired and
tested together to verify proper operation prior to shipment.
.
F. Chiller shall be manufactured at an ISO (International Organization for Standardization) 9001 facility.
1.03 DELIVERY, STORAGE AND HANDLING
A. Unit shall be stored and handled in accordance with manufacturer's instructions.
B. Unit shall be shipped with all refrigerant piping and control wiring factory installed.
C. Unit shall be shipped charged with oil and full charge of refrigerant HFC-134a or a nitrogen holding
charge as specified on the equipment schedule.
D. Unit shall be shipped with firmly attached labels that indicate name of manufacturer, chiller model number,
chiller serial number, and refrigerant used.
E. Unit shall be sufficiently protected from the factory against sea water corrosion to be suitable for
sea-shipment.
1.04 WARRANTY
Warranty shall include parts and labor for one year after start-up or 18 months from shipment, whichever
occurs first.
Part 2 — Products
2.01 EQUIPMENT
A. General:
Factory assembled, single piece, liquid chiller shall consist of compressor, motor, starter or variable
frequency drive, lubrication system, cooler, condenser, initial oil and refrigerant operating charges,
microprocessor control system, and documentation required prior to start-up.
B. Compressor:
1. One high performance screw compressor.
2. Compressor, motor, and transmission shall be semi-hermetically sealed into a common assembly
and arranged for easy field servicing.
3. All pressure transducers shall have quick-disconnects to allow replacement of the sensor without
replacement of the entire sensor wire. Pressure transducers and temperature sensors shall be
serviceable without the need for refrigerant charge removal or isolation.
4. Screw compressors shall be provided with a factory-installed lubrication system to deliver oil
under pressure to bearings and transmission.
Included in the system shall be:
a. Hermetic driven oil pump with factory-installed motor contactor with overload protection.
Flooded type water cooled screw chiller (MIC)
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