SECTION 2 TESTING & SERVICE
TRANSFER TEST | DISCONNECTING THE CONTROLLER |
Operate the 7000 Series ADTS at least once a month by following the
PREVENTIVE MAINTENANCE
Reasonable care in preventive maintenance will insure high reliability and long life for the 7000 Series ADTS. An annual preventive maintenance program is recom- mended.
ASCO Services, Inc. (ASI) is ASCO Power Technologies’ national service organization. ASI can be contacted at
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!
jClean the ADTS enclosure. Brush and vacuum away any excessive dust accumulation. Remove any moisture with a clean cloth.
jCheck the transfer switch contacts. Remove transfer switch barriers and check the condition of the contacts. Replace contacts when pitted or worn excessively. Reinstall the barriers carefully.
jMaintain transfer switch lubrication. If switch is subjected to severe dust or abnormal operating conditions, renew factory lubrication on all move- ments and linkages. Relubricate solenoid operator if TS coil is replaced. Don’t use oil; order lubrica- tion kit
jCheck all cable connections & retighten them.
REPLACEMENT PARTS
Replacement parts are available in kit form. When ordering parts provide the Serial No., Bill of Material No. (BOM), and Catalog No. from the transfer switch nameplate. Contact your local ASCO Power Technolo- gies Sales Office or ASI:
call 1 – 800 – 800 – ASCO ( 2726 )
The harness disconnect plugs are furnished for repair purposes only and should not have to be unplugged. If the control panel 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, place standby engine starting control in the off position. Then open the emergency source circuit breaker.
b.If the transfer switch is in the Emergency position, open the normal source circuit breaker. Place the engine starting control in the test or run position.
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, be sure that the standby engine starting control is still in the off position. The emergency source circuit breaker still should be open.
b.If the transfer switch is in the Emergency position, normal source circuit breaker still should be open.
2.The two harness plugs and sockets are keyed. Carefully align the plugs with the sockets and press straight in until both latches click.
3.Restore the opposite source as follows:
a.If the transfer switch is in the Normal position, place the standby engine starting control in the automatic position. Then close the emergency source circuit breaker.
b.If the transfer switch is in the Emergency position, close the normal source circuit breaker.
