Emerson Series 386 User Manual download pdf (Page 8)

SECTION 3

TESTING & SERVICE

3 --- 1

PREVENTIVE MAINTENANCE

Reasonable care in preventive maintenance will insure

high reliability and long life f or the switch. An annual

preventive maintenance program is recommended.

ASCO Services, Inc. (ASI) is ASCO Power

Technologies’s national servi ce organization. ASI

can be contacted at 1-800-800-2726 for information

on preventive maintenance agreements. In Canada

call 1–888–234–ASCO (2726).

TESTING

Operate the swi tch at least once a month by following this

four-step Electrical Operation Test.

Transfer Switch Test

A. Turn the door-mounted Tr an sfer C o ntr o l switch

clockwise to Transfer to Emergency.

B. The transfer switch will operate to the Emergency

position. The Load Connected To Emergency light

should come on and the Load Connected to Normal

lig ht should go off.

C. Turn the door-mounted Tr an sfer C ontr ol switch

counterclockwise to Transfer t o Normal.

D. The transfer switch will operate to the Normal posi-

tion. The Load Connected to Normal light should come

on a n d th e Load Connected to Emergency light should

go off.

Checklist f or Yearly Inspection

Hazardous voltage capable of causing shock,

burns, or death is used in this switch.

Deenergize both Normal & Emergency power

sources before p erforming inspections!

❐ Clean the switch enclosure. Brush and vacuum away

any excessive dust accumulation. Remove any mois-

ture with a clean cloth.

❐ Check the Switch Contacts

.Removetransferswitch

barriers and check the condition of the contacts. Re-

place contacts when pitted or worn excessively. Re-

install barri ers carefully.

❐ Maintain transfer switch lubrication.Ifswitchis

sub jec ted to severe dust or abnorm al operating c on-

ditions, renew factor y lubr ic ation on all movem en ts

and lin ka g es . Relu b r ic ate sole no id oper ato r if TS

co il is replaced . Don’t use oil; ord er lubrication

625550–001 (Castrol EndurexR 4000 lubricant).

❐ Check all cable connections and retighten them.

REPLACEMENT PARTS

Replacement parts are available in kit form. When or-

dering parts provide the Serial No., Bill of M aterial 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), or in Canada call

1–888–234–ASCO (2726).

DISCONNECTING THE CONTROLLER

The harness disconnect plugs are furnished for repair

purposes only and should not have to be unplugge d. If

the controller must be isolated, follow these steps:

Disconnecting the Plugs

Do not unplug the controller until

step 1a. o r 1b. below is completed.

1. Observe the position of the transfer switch.

a. If the transfer switch is in the Normal position, place

stand b y engine starting contr o l 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 t he test or run position.

2. Separate the quick disconnect plugs by squeezi ng t he

latches. Do not pull on the harness wires.

Reconnecting the Plugs

Do not reconnect controller until

steps 1 and 2 below are 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 cir-

cuit breaker still should be open.

b. If transfer sw itc h is in the Emergency position, nor-

mal source circuit breaker still should be open.

2. The 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.

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Emerson Series 386 User Manual Page 8

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