SECTION IV
Maintenance
Page 4.2
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4.2 Safety Precautions (continued)
3. Never wear metal jewelry such as rings or wrist watches when working on the
UPS equipment.
4. Keep cabinet doors closed and secured during normal operation.
5. Never guess about safety procedures. If any doubt exists, ask someone who
knows.
6.
Always be aware of the presence of high voltage
within the UPS.
Check with a voltmeter to make sure power is off and conditions are safe before
attempting to make repairs, adjustments, etc. within the unit.
7. Above all, always
USE COMMON SENSE!
4.3 Preventive (Periodic) Maintenance
The following paragraphs describe preventive maintenance procedures
which, when followed, will increase the reliability and efficiency of the UPS
system operations.
4.3.1 Air Filters
Filters, installed in the bottom of the cabinet, eliminate particles from the air
which is used to cool the UPS. In time, particle accumulation in the filters will
reduce airflow through the system causing a rise in operating temperatures,
triggering an alarm condition and resulting in shut down of the UPS. Filters should
be checked and cleaned or replaced at least every 30 days in a clean environment,
and no more than 7 days in a dirty environment.
Models of 125 and 150 kVA have two filters; other models have only one.
Loosening a clip beneath the UPS near the front allows the filter to drop down and
you can slide it out. Insert new filter and twist clip to secure it in place.
Filters are standard fiberglass furnace filters of the following sizes:
10-100 kVA UPS - 16" x 25" x 1"
125-150 kVA UPS - 14" x 25" x 1"
