Testing & Service - Emerson ASCO 7000 Series Operator's Manual

TRANSFER TEST
Operate the 7000 Series ATS at least once a month by
following the five–step Electrical Operation Transfer
Test procedure on page 1–5.
PREVENTIVE MAINTENANCE
Reasonable care in preventive maintenance will insure
high reliability and long life for the 7000 Series ATS. An
annual preventive maintenance program is recom-
mended.
In the United States, ASCO Services, Inc. (ASI) is
ASCO Power Technologies's national service
organization. ASI
1-800-800-2726 (ASCO)
preventive maintenance agreements.
In Canada, for service call 1-800-234-2726 (ASCO).
Checklist for Yearly Inspection
Hazardous voltage capable of causing shock,
burns, or death is used in this switch.
Deenergize both Normal – Emergency power
sources before performing inspections!
Clean the ATS enclosure. Brush and vacuum away
any excessive dust accumulation. Remove any
moisture with a clean cloth.
Check the transfer switch contacts. Remove the
transfer switch barriers and check contact condition.
Replace the contacts if they become pitted or worn
excessively. Reinstall the barriers carefully.
Maintain transfer switch lubrication. If the
transfer switch is subjected to severe dust or
abnormal operating
lubrication on all
Relubricate the solenoid operator if the TS coil is
replaced. Do not use oil; order lubrication kit 75-100.
Check all cable connections & retighten them.
REPLACEMENT PARTS
Replacement parts are available in kit form. When or-
dering parts provide the Serial No., Bill of Material No.
(BOM), and Catalog No. from the transfer switch name-
plate. Contact your local ASCO Power Technologies
Sales Office or ASI:
in United States call 1 800 – 800 – ASCO (2726)
or in Canada call 1 800 – 234 – ASCO (2726)
SECTION 2
can be contacted
for information on
conditions, renew factory
movements and linkages.
TESTING & SERVICE
DISCONNECTING THE CONTROLLER
The harness disconnect plugs are furnished for repair
purposes only and should not have to be unplugged. If
the controller must be isolated, follow these steps:
Disconnecting the Plugs
Do not unplug the controller
until steps 1a or 1b is completed.
1. Observe the position of the transfer switch.
a. If the transfer switch is in the Normal position, first
at
place standby engine starting control in the off
position. Second, then open the emergency source
circuit breaker. Third, open the normal source
circuit breaker.
b. If the transfer switch is in the Emergency position,
first open the normal source circuit breaker. Sec-
ond, place the engine starting control in the test
or run position. Third, open the emergency source
circuit breaker.
2. Separate the two quick disconnect plugs by squeez-
ing the latches. Do not pull on the harness wires.
Reconnecting the Plugs
Do not unplug the controller
until steps 1a or 1b is completed.
1. Observe the position of the transfer switch.
a. If the transfer switch is in the Normal position,
first be sure that both normal and emergency
source circuit breakers are open. Second, be sure
that the standby engine starting control is still in
the off position.
b. If the transfer switch is in the Emergency position,
first be sure that both normal and emergency
source circuit breakers are open.
2. The two harness plugs and sockets are keyed. Care-
fully align the plugs with the sockets and press
straight in until both latches click. Close the door!
3. Restore the two sources in sequence as follows:
a. If the transfer switch is in the Normal position,
first close the normal source circuit breaker.
Second, close the emergency source circuit break-
er. Third, place the standby engine starting
control in the automatic position.
b. If the transfer switch is in the Emergency position,
first close the emergency source circuit breaker.
Second close the normal source circuit breaker.
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