Hypertherm Koolant Koolers N-Series, Руководство пользователя

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Maintenance ‐ Suggested Maintenance Checklist
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10 Maintenance
Establishing and following a proper maintenance schedule will substantially reduce down time, reduce repair
costs and extend lifetime of the chiller. A suggested checklist has been provided in section 10.1 Suggested
Maintenance Checklist.
10.1 Suggested Maintenance Checklist
Items in this list should be initially performed on a weekly basis to determine their respective maintenance
frequencies. For example, if a component requires cleaning or replacement after 12 weeks of operation then
the maintenance frequency of that component is 12 weeks. Maintenance frequencies must be re ‐ established
when operating environments or conditions have changed.
1. Inspect and clean the condenser coil and air intake filter
Excessive buildup of dirt, oil and/or other debris on the condenser coil and air intake filters will cause
reduced air flow rates for heat dissipation leading to lower cooling capacities. Ensure that the fins of the
condenser coil are clean and undamaged. Use compressed air at no more than 30psi (2.0bar) to blow
out the condenser coil and air intake filters in the direction opposite to normal air flow. For the
condenser coil the cleaning air should enter the discharge side and exit from the intake side (refer to
Figure 41 and Figure 42). The air intake filters show the direction of cleaning and installation. If the air
filters cannot be cleaned then they must be replaced. Contact the factory for replacement parts if
required.
2. Inspect the supply pressures.
Record the supply pressure of both circuits after the initial startup and then periodically. If plumbing
connections between the chiller and plasma system (hose lengths, fittings, valve positions, etc.) have
remain unchanged it is expected that the supply pressures should remain relatively constant over time.
An increase in pressure is indicative of a clogged filter/strainer or buildup of debris in the coolant
circuits.
3. Inspect the cold water particulate filter.
Inspect the particulate filter to determine if it needs to be replaced. Refer to Figure 41 for the location.
The particulate filter’s sump can be removed and reinstalled using the provided filter wrench (typically
stored in the inside door pocket of the electrical enclosure when shipped). After `inspection or
replacement reinstall the filter and sump correctly and securely using the filter wrench to prevent leaks.
Contact the factory for replacement parts if required.
4. Inspect the cooling water y ‐ strainer.
Inspect the y ‐ strainer’s screen weekly to determine if it needs to be cleaned or replaced. Refer to Figure
41 for the location. Remove the y ‐ strainer’s plug to access the screen. After inspection, cleaning or
replacement reinstall the screen and plug correctly and securely to prevent leaks. If the screen cannot
be cleaned it must be replaced. Contact the factory for replacement parts if required.
5. Inspect the quality of the coolant in the reservoir.
Access the coolant in the reservoir via the access cap (refer to Figure 42). If debris are present in the
coolant the particulate filter is most likely clogged (refer to item 2 to inspect and replace the particulate
filter). If algae or bacteria is growing in the reservoir then the system must be drained and the coolant
must be replaced. Contact the factory for recommendations on this procedure.
Hypertherm, Inc. Part Number: 810540