Filter
Top Products
SECTION 2 TESTING & SERVICE
2 --- 1
TRANSFER TEST
Operate the 4000 Series ADTS at least once a month by
following the five–step Electrical Operation Transfer
Test procedure on page 1–7.
PREVENTIVE MAINTENANCE
Reasonable care in preventive maintenance will insure
high re liability and long life for the 4000 Series ADTS.
An annual preventive maintenance program is recom-
mended.
ASCO Services, Inc. (ASI) is ASCO P ower
Technologies’s national service organization. In the
US ASI can be contacted at 1-800-800-2726 for in-
formation on preventive maintenance agreements.
Checklist f or Yearly Inspection
Hazardous voltage capable of causing shock,
burns, or death is used in this transfer switch.
Deenergize both Normal – Emergency power
sources bef ore performing inspections!
❐ Clean t he 4ADTS enclosure. Brush and vacuum
away any excessive dust accumulation. Remove any
moisture with a clean cloth.
❐ Check the transfer switch contacts.Removethe
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.Ifthe
transfer switch is subj ec ted to severe dust or
abnor m al operating con ditions , renew factory
lubrication on all movements and linkages.
Relub r ic ate the so l en o id ope rato r if the T S c oil 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 the United States
call 1 – 800 – 800 – ASCO ( 2726 )
In Canada
call 1 – 888 – 234 – ASCO ( 2726 )
DISCONNECTING T HE 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 o r 1b is com pleted.
1. Observe the position of the transfer switch.
a. If the trans fer s w itch is in the Normal position, first
place standby engine starting control in the off
position. Second, then open the emerg ency source
circuit b reaker. Third, open the normal source
circuit breaker.
b. Ifthe transferswitchis in the Emergency position,
first open the normalsource circuit breaker. Sec-
ond, place the engine starting control in the test
orrun position. Third, open the emergency source
circuit breaker.
2. Separate the two quick disconnect plugs by squee z-
ing the latches. Do not pull on the harness wire s.
Reconnecting the Plugs
Do not reconnect the controller
until steps 1a o r 1b is com pleted.
1. Observe the position of the transfer switch.
a. If the transfer switch is in the Normal position,
firstbesurethatboth
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 tran sfer switch is in the Emergency position,
firstbesurethatboth
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 i n the automatic position.
b. Ifthe transferswitchis in the Emergency position,
first close the emergency source circuit breaker.
Second close the normal source circuit breaker.