MGE UPS Systems 40-150kVA - Manual (Page 43)

Maintenance
4.0 Scope
Preventive maintenance and battery safety instructions for Comet 40-150kVA UPS, and information about
replacement parts, and customer service.
4.1 Battery Safety
IMPORTANT SAFETY INSTRUCTIONS FOR SERVICING BATTERIES
A. Servicing of batteries should be performed or supervised by personnel knowledgeable with batteries and
the required precautions. Keep unauthorized personnel away from batteries.
B. When replacing batteries, use the same model and manufacturer of batteries.
C. CAUTION — Do not dispose of battery or batteries in a fire. The battery may explode.
D. CAUTION — Do not open or mutilate the battery or batteries. Released electrolyte is harmful to the skin
and eyes. It may be toxic.
E. CAUTION — A battery can present a risk of electrical shock and high short-circuit current. The following
precautions should be observed when working with batteries:
1. Remove watches, rings, or other metal objects.
2. Use tools with insulated handles.
3. Wear rubber gloves and boots.
4. Do not lay tools or metal parts on top of batteries.
5. Disconnect charging source prior to connecting or disconnecting battery terminals.
6. Determine if ground faults exists. If so, remove the source of ground. Contact with any part of a grounded
battery can result in electrical shock. The likelihood of such shock will be reduced if such grounds are
removed during installation and maintenance.
4.2 Preventive Maintenance
The following preventive maintenance routines should be considered the minimum requirements; your
installation and site may require additional preventive maintenance to assure optimal performance from your
installed Comet UPS and associated equipment. These routines should be performed twice a year (more often
if required). We strongly recommend contracting MGE Customer Support Services for preventive and remedial
maintenance at 1-800-438-7373.
The technician or electrician performing preventive maintenance on the UPS must be familiar with the
indicators, controls, and operation of the UPS.
a. Isolate and de-energize all Comet UPS equipment for all maintenance operations. Lock and tag all upstream
circuit breaker(s) during maintenance.
b. Ensure that all equipment is clean and free of dust, dirt, and debris. The exterior of the UPS enclosure may
be cleaned with a mild solution of soap and water, lightly applied with a lint-free cloth.
c. Clean/replace the air intake filters, exhaust plates, and the enclosure interior with a vacuum cleaner.
d. Initiate the startup procedure, as described in Section 3.
e. Test the main operating sequences as applicable to your installation (see Section 3).
4 —1 86-160310-00 E00 Maintenance