Operator's Manual

Operator’s Manual ASCO 336 / 337
381333-427 A ASCO Power Technologies Page 15
Testing & Service
Transfer Test
Operate the transfer switch at least once a month by following
the Electrical Operation procedure on page 8.
Preventive Maintenance
Reasonable care in preventive maintenance will insure high
reliability and long life for the transfer switch. An annual
preventive maintenance program is recommended.
Replacement Parts
When ordering replacement parts provide the Serial No., Bill
of Material No. (BOM), and Catalog No. from the transfer
switch nameplate. In the US call 800-800-2726 (ASCO) or
contact [e-mail].
Yearly Inspection
Hazardous voltage capable of causing shock,
burns, or death is used in this transfer switch.
Deenergize both Normal & Emergency power
sources before performing inspections!
Clean the enclosure. Deenergize all sources, then brush
and vacuum away any excessive dust accumulation. Remove
moisture with a clean cloth.
Inspect the transfer switch contacts. Deenergize all
sources, then remove the transfer switch barriers and check the
contact condition. Replace contacts when pitted or worn
excessively. Reinstall the barriers carefully.
Maintain transfer switch lubrication. Under normal
operating conditions no further lubricating is required. Renew
factory lubrication if the transfer switch is subjected to severe
dust, abnormal operating conditions, or if the TS coil is
replaced. Order lubrication kit 920799 for J & H design and
kit 920836 for G design.
Check all cable connections & retighten them.
Torque to values shown on the transfer switch label.
DANGER
!
ASCO Services, Inc. (ASI) is ASCO Power
Technologies’ national service organization.
ASI can be contacted at 1-800-800-2726 for
information on
p
reventive maintenance a
g
reements.