2200Q2JE-HO-KHM-N_2015.02.
Chapter 5 Maintenance and Inspection
Ammonia Semi-hermetic Motor with K-series Compressor 5.1 Precautions for Maintenance
5-3
5.2 Contents of Maintenance and Inspection
5.2.1 Daily Management and Regular Inspection
For the daily maintenance and regular inspection, refer to the "Reciprocating Compressor K-series
instruction manual", Section 5.2 and exercise every corresponding item.
Particularly for this product, properly control its cooling water in its flow rate, water quality and
temperature, conduct regular inspection and cleaning of the strainer and water channels to maintain
the cooling system in normal condition.
5.2.2 Overhaul
The overhaul of the semi-hermetic motor is required not only for the overhaul of the motor described in
Section 5.3.1.2, but also when removing the crank shaft of the compressor.
When overhauling the motor, first remove the whole wiring including power cable connected to the
motor before disassembling.
Before removing the wires, give marking (matching marks) to the wires and terminals to avoid
connection errors that may occur at re-wiring.
When performing overhaul only motor jacket block described in Section 5.3.1.1, it is unnecessary
to remove the power supply line and other wires connected to the motor.
5.2.3 Guideline for the Semi-hermetic Motor Overhaul Timing and
Details
The required frequency of overhaul will vary depending on the compressor model,
refrigerant, rotating speed, usage condition, state of system, and type of oil.
The cost of parts replacement will be charged to the customer even if the part failure
occurs before reaching the overhaul time listed in this section.
The recommended overhaul timing and details is shown below as a guideline.
Here, it is assumed that:
(1) The operating condition is within the specified operation range
(2) The number of start/stop cycles is within the specified limit,
(3)
Daily maintenance and regular inspection services including recording are properly exercised.
(4) The cooling water cooling system used for this product is of the closed type.
5.2.3.1 Overhauling the Motor Jacket
Conduct the overhaul at intervals of 1 year or 8,000 hours, whichever earlier, after the commissioning.
Remove the oil feeding/draining tubes of the motor and jacket cover, and conduct the inspection and
cleaning inside the motor jacket. In a daily inspection, if no fault is found in each inspection item, there
is no need of overhauling the motor or other components.
The rust preventive paint that is peeled during cleaning of the inner surface of motor jacket, touch it up
by painting with a brush.
Inspect the O-ring [610-1] of the motor jacket cover, and replace it if any fault is found.
Replace the motor jacket cover gasket [611] and water flange gasket [HKFG] without fail.
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