Emerson ASCO 185 User Manual

Operator’s

Automatic Transfer Switches

Manual

DANGER is used in this manual to warn of high
voltages capable of causin g shock, burns, or death.

WARNINGisusedinthismanualtowarn
of possible personal injury.

CAUTIONisusedinthismanualtowarn
of possible equipment damage.

An experienced licensed electrician must install the A TS.

100 throu gh 400 ampe re sizes

Series 185

Refer to the outline and wiring drawings provided with
your ASCO Series 185 ATS for all installation details.

ASCO Series 185 Automatic Transfer Switches (ATSs) are
Listed under Underwriter’s Laboratories Standard for
Transfer Switch Equipment, UL–1008. They are intended
for use only in optional standby system s in accordanc e with
the National Electrical Code, NEC/NFPA 70, Article 702.
This ATS is for use with 2–wire automatic start generators
only.

Refer to Application Informaton 381339–292 to confirm
that you have selected tha appropriate product for the
intended installatio n .

This automatic transfer switch is intended for standby
power applicato n s in residential / lig h t commercial use only.

This product is not intended for emergency
or life–support systems.

If you have more stringen t applicatio n requirements contact
ASCO Pow er Technolog ies for other produc ts suitable for
critical applications.

Rating Label

Each automatic transfer switch contains a rating label to
define the loads and fault circuit withstand / closing ratings.
Refer to the label on the transfer switch for specific values.

Do not exceed the values on the rating label.
Exceeding the rating can cause personal
injury or serious equipment damage.

TABLE OF CONTENTS

page

INSTALLATION 1..........................

CONTROLLER 2–5........................

FUNCTIONAL TEST 6......................

SEQUENCE OF OPERATION 7.............

TROUBLESHOOTING 8–9..................

100–230 ampere sizes

50 Hanover Road, Florham Park, New Jersey 07932–1591 USA
For sales or service call 1 800 800–2726 (ASCO) www.ascopower.com

ASCO POWER TECHNOLOGIES CANADA PO Box 1238, 17 Airport Road, Brantford, Ontario, Canada N3T 5T3
telephone [phone], fax [phone], for service call 1 888 234–2726 (ASCO) www.asco.ca

INDEX 10.................................

381333–319 A

Series 185

Nameplate

The Transfer Switch nameplate includes data for each
specific ASCO Series 185 ATS. Use the ATS only
within the limits shown on this nameplate.

D 185 A 2 200 F 4 C

Neutral

A –standard

Phase Poles

2 –singleØ

Amperes Voltage Controller Enclosure

100

200

230

260
400

clock battery

cable spacers
(see INSTALLATION)

Catalog Number Identification

A typical Catalog Number is shown below with its
elements explained. The example is for a D–design,
2 pole, 200 A, 220–240 V, in a Type 1 indoor enclosure:

F 220--- 240

4 –standard

4X

–if

accessories

ordered

load power
connections

C –Type1

M –Type3R

emergency
power
connections

neutral
connections

terminals

for optional

switch

position

contacts

(shown

installed)

Transfer

Switch

ground

connections

200 ampere size in typical enclosure with location of customer connections

381333–319 A

membrane

controls

generator
control
connections

Controller

harness plug

utility power
connections

INSTALLATION

Series 185

Installation of the ASCO Series 185 automatic transfer
switch (ATS) must be performed by a licensed electrician.
It must be installed according to the National Electrical
Code (NEC) and all local electrical code requirements.
Remove the enclosure cover and inspect the ATS for
shipping damage. If damage is evident do not install the
ATS .

1 --- M o u n t i n g

Refer to the enclosure outline drawing. Mount the ATS
according to details and instructions shown on this
diagram. Mount the ATS vertically to a rigid supporting
structure. Level all mounting points by using flat washers
behind the holes to avoid distortion of the enclosure.

MALFUNCTION or SHORTENED LIFE
Protect the ATS from construction grit and metal
chips to prevent malfunction or shortened life.

Transfer switches rated 260 and 400 amperes are
mounted on an insulator backing piece (installed behind
the transfer switch). If the transfer switch is removed
from the enclosure and then reinstalled, this insulator
must be placed behind the transfer switch. See Figure 1.

2 --- Electrical Power Connections

Refer to the wiring diagram. The ATS must be protected
by suitably sized circuit breakers feeding the utility and
generator source terminals. The rating of the circuit
breakers must be based on the requirements of the
National Electrical Code for its nameplate ampere and
short circuit withstand ratings.

ELECTROCUTION HAZARD Turn off utility
power and turn off the generator to prevent
electrocution when wiring the transfer switch.

Cable Spacers for 200 and 230 A

Three cable spacers are included with 200 and 230
ampere transfer switches. Run the copper power cables
throughthecablespacersasshowninFigure2. Position
the cable spacers approximately 1½ inches from the
terminal lugs.

CABLE LOOSENING DUE TO SHORT CIRCUIT
Install three cable spacers 1 1/2 inches from
the power terminals to prevent the cables from
loosening during a short–short condition.

FLASH HAZARD – DAMAGE
Be sure that the insulator piece is installed behind
the 260 and 400 ampere transfer switches.

insulator
backing
piece

Figure 1. Insulator for 260 and 400 A.

cable spacers

1 ½ inch approximate

use copper power
cables only for
200 and 230 A

cable spacer

Figure 2. Cable spacers for 200 and 230 A.

1

381333–319 A

CONTROLLERSeries 185

The Group 4 digital Controller is used in ASCO Series
185 automatic transfer switches. It provides the sensing,
timing, and control functions for the ATS. This micro–
processor–based controller includes built–in control
buttons and st atus lights for control of the ATS and
generator.

clock
battery
cover
seepage3

Utility
Acceptable
light

Trans fer
Tes t
button

Load on
Utility light

1 --- P u s h B u t t o n s

On the front control display are three push buttons that
control the operation of the generator and the ATS .

Before using the transfer test button, be sure that
conditions are safe for running the generator and
for load transfer.

Transfer Test

Use this button to test the system. This operation starts
the generator and transfers the load. Be sure that
conditions are safe to do this operation.

Bypass Time Delay

Use this button to cancel the active time delay or exercise
period (stops the generator after cooldown).

Set Engine Exerciser

Use this button to set the automatic generator exerciser
(page 3).

2 --- I n d i c a t o r L i g h t s

Bypass
Time Delay
button

Set
Exerciser
button

Automatic
Generator
Exerciser
light

Load on
Generator
light

Generator
Acceptable
light

Figure 3. Front view of controller.

On the f ront control display are five lights that indicate
the status of the sources and the ATS.

Utility Acceptable

This light i ndicates that the utility voltage is acceptable
for connection to the load.

Generator Acceptable

This light indicates that the generator voltage is
acceptable for connection to the load.

Load on Utility

This light indicates that the generator voltage is
acceptable for connection to the load.

Load on Generator

This light indicates that the generator voltage is
acceptable for connection to the load.

Automatic Generator Exerciser

When the utility is acceptable and the load is on the
utility, this light flashes the number of days until the next
exercise period. When i t is off, no exerciser period is set.
The light is also off when the generator is running.

381333–319 A

2

CONTROLLER

Series 185(continued)

3 --- Generator Starting Contacts

The generator starting contacts connections are on the
controller. Refer to the generator manual. Disconnect
the generator battery and verify that the ignition switch is
in the OFF position. Connect the generator starting
wires to the appropriate terminals on terminal block TB7
as shown on the wiring diagram. For wiring convenience
terminalblockTB7hasaremovableplug. SeeFigure4
and Table A.

123456789

TB7–4, TB7–5, TB7–6

Figure 4. TB7 generator starting contact terminals.

TB7

removable

terminal block

5 --- Automatic Generator Exerciser

The built–in automatic generator exerciser can be set to
exercise the generator for 20 minutes once every week.

Clock Battery

Be sure a fresh battery is installed and turned on. It will
maintain the ex erciser clock for about 24 hours in case of
a power outage.

Recommended9voltalkalinebatteriesare(seeFigure

5): Duracell MN 1404, Everready 522, Panasonic 6AM6

Turn on battery by putting S2 DIP switch actuator 10 in
the on position (up). See Table B and Figure 6.

Exercise with or without Load

The generator should be exercised under load or follow
the recommendations of the generator manufacturer. Be
sure the exerciser is turned on. Then select either
exercise with or without load. The ATS will transfer the
load to the generator when the exercise with load is
selected. See Figure 6 and Table B.

Table A. Generator Start Connections

When the Utility fails Terminals on Controller

contact closes TB7–4 and TB7–5

contact opens TB7–5 and TB7–6

4 --- S e t t i n g s

ThetimedelayandsensorsettingintheGroup4
controller are accessible on the inside. Refer to Tables B
and C and to Figures 6 and 7. Use a ball–point pen or
other pointed tool to slide the DIP switch actuators up or
down to match setting shown.

All power must be off before making any changes.

The factory default settings are shown in Table G on
page 5.

cover must be removed
to replace 9V battery
(use alkaline type)

screw

Table B. Generator Exercise Settings

Function

clock

battery

exerciser off S1 7

with load or

without load

Factory

Setting

off S2 10

without

load

DIP

Switch

S1 8

DIP

Actuator

Actuator

Position

on (up)

off (down)

on (up)

off (down)

without (up)
with (down)

To S e t E x e rci s e r

Press and hold (5 seconds) the Set Engine Exerciser
button. The exercise period occurs immediately

and at
the same time weekly thereafter. The status light below
the button blinks rapidly to indicate that the exerciser
has been set. The number of flashes indicates the
number of days until the next exercise period (at
approximately

thesametimethebuttonwaspressed).

To Cancel an Active Exercise Period

Press the Set Engine Exerciser button t o stop a n
exercising generator. If exercise with load is set, the ATS
retransfers the load to the utility, then stops the
generator after cooldown.

Figure 5. Battery replacement.

3

381333–319 A

Series 185

overridemomentary

3

overridemomentary

unloadedrunning

f

l60

H

198

V

198V*

ili

1

87V

d

1

87V

176

V

154V

d

j

b

le–––

d

j

b

le–––

CONTROLLER

(continued)

S1 DIP switch

S2 DIP switch

S3 DIP switch

Figure 6. DIP switches S1 and S2 at the top right.

The time delay settings are shown in Figures 6 and 7 and
in Table C. The sensor settings are shown in Figure 6
and in Table D. The standard (factory) settings are
showninTablesC,D,andH.

Figure 7. DIP switch S3 at the bottom center.

TableC. TimeDelaySettings

Time Delay Description Factory Setting Settings DIP Switch DIP Actuator Actuator Position

override momentary
utility outages

transfer to generator 10 seconds (approx.) – – – –

override momentary
generator outages

transfer to utility 15 minutes (approx.) – – – –

unloaded running
(generator cooldown)

seconds

4seconds

5minutes

1second S2 1 on (up)

3seconds S2 1 off (down)

4second S3 9 on (up)

0 S3 9 off (down)

5 minutes S1 10 on (up)

0 S1 10 off (down)

Table D. Voltage and Frequency Settings

Setting Description Setting Factory Setting Settings DIP Switch DIP Actuator Actuator Position

voltage – 220 – 240 V non–adjustable S2 2 on (up)

requency nomina

phase – single non–adjustable S1 2 off (down)

pickup

ut

ty voltage

ropout

generator voltage

generator frequency pickup

pickup 198 V

dropout 165 V

57 Hz (nom 60 Hz)
48 Hz (nom 50 Hz)

dropout

51 Hz (nom 60 Hz)
43 Hz (nom 50 Hz)

z

50 Hz S1 4 on (up)

60 Hz S1 4 off (down)

198 V S1 3 on (up)

209 V * S1 3 off (down)

S1 1 off (down)

S1 2 off (down)

S1 1 on (up)

S1 2 off (down)

S1 1 off (down)

S1 2 on (up)

S1 1 on (up)

S1 2 on (up)

non–a

non–a

*

usta

usta

* If the dropout voltage is set to 198 V, the pickup voltage must be set to 209 V.

381333–319 A

4

CONTROLLER

disable

d

disable

d

disable

d

S

1

S

2

S

3

Series 185(continued)

6 --- Remote Control Features

These remote control features require a customer–
supplied normally–closed contact suitable for a 5 V dc
low energy circuit. Refer to the wiring diagram provided
withtheATS. ActivatetheappropriateDIPswitchS3
actuators as shown in Tables E, F, or G. See Figure 7.

Remote test

Normally–closed input. When opened, it simulates a
utility failure. The generator is signalled to start
immediately and the load transfers to the generator (if
acceptable). If the generator fails, the load stays on the
generator until the remote test circuit is closed.

TableE. Remotetest

Function

disabled

enabled

Factory
Setting

disabled

(on)

DIP

Switch

S3 3

DIP

Actuator

Actuator
Position

on (up)

off (down)

Remote test (with automatic retransfer)

Normally–closed input. When opened, it simulates a
utility failure. The generator is signalled to start
immediately and the load transfers to the generator (if
acceptable). If the generator fails, the load transfers
back to the utility (if acceptable).

Table F. Remote transfer to generator

Function

disabled

enabled

Factory
Setting

disabled

(on)

DIP

Switch

S3 2

DIP

Actuator

Actuator
Position

on (up)

off (down)

Bypass load transfer to utility time delay

Normally–closed input. When opened, it bypasses or
cancels the generator to utility load transfer time delay.
The load transfers back to the utility.

Table G. Bypass load transfer to utility time

delay

Function

disabled

enabled

Factory
Setting

disabled

(on)

DIP

Switch

S3 1

DIP

Actuator

Actuator
Position

on (up)

off (down)

7 --- F a c t o r y S e t t i n g s --- S u m m a r y

Table H. Factory Settings – Summary

DIP Switch DIP Actuator Actuator Position

1 on (up)

2 off (down)

3 on (up)

4 off (down)

5 off (down)

6 on (up)

7 off (down)

8 off (down)

9 off (down)

10 on (up)

1 off (down)

2 on (up)

3 off (down)

4 on (up)

5 on (up)

6 on (up)

7 on (up)

8 on (up)

9 off (down)

10 off (down)

1 on (up)

2 on (up)

3 on (up)

4 on (up)

5 on (up)

6 off (down)

7 on (up)

8 on (up)

9 on (up)

10 on (up)

5

381333–319 A

FUNCTIONAL TESTSeries 185

After installing the Series 185 automatic transfer switch
(ATS) perform the following three–part functional test.

1 --- M a n u a l O p e r a t i o n

A handle is provided on the transfer switch for mainte­nance purposes only. Manual operation of the transfer
switch should be checked before it is energized (operated
electrically).

Do not manually operate the transfer switch
until both power sources are disconnected:
open both circuit breakers.

1. Turn OFF both the utility and generator circuit
breakers feeding the ATS. Verify that ALL POWER

IS OFF!

2. 100–230 A
Grasp the maintenance handle and turn it quickly
with your thumb and fingers to manually operate the
transfer switch.

260–400 A

Insert the maintenance handle into the hole in the
shaft, left side of the operator. Move the handle as
shown to manually operate the transfer switch.

3. The switch should operate smoothly without binding.
If it does not, check for shipping damage or
construction debris.

4. Aft er checking the manual operation, use the handle
again to return the transfer switch to the utility
source position.
100–230 A seeFigure8.
The letter P (utility) on the round weight is facing
you.
260–400 A seeFigure9.
The letter N (utility) on the round weight is facing
you.
Remove the maintenance handle and store it on the
transfer switch in the place provided.

260–400 A Remove the maintenance handle
before proceeding!

2 --- V o l t a g e C h e c k s

The ATS is rated for 220–240 V ac 60 or 50 Hz. Verify that
both the utility and generator sources are 220–240 V ac 60
or 50 Hz.

maintenance handle

With ALL POWER OFF
grasp maintenance
handle and turn it
quickly with your
thumb and fingers.

weight marked P (utility) and A (generator)

Figure 8. Maintenance handle for 100–230 A.

hole

maintenance

handle

shaft

Figure 9. Maintenance handle for 260–400 A.

3 --- Electrical Operation

This procedur e checks the elec tr ic al operation of the ATS.

1. Install the enclosure cover and tighten the screws.

2. Verify that the generator battery is connected and
that the generator’s starting controls are set for
automatic.

3. Turn on both the utility and generator circuit breakers.

4. Verify that the Utility Acceptable and Load on Utility
lights are on.

5. This step will start the gene rator. Press and hold the
Tra ns f er Te st button until the Generator Acceptable
light comes on and stays on. Then release the button.

6. Aft er the Generator Acceptable light comes on, the
ATS transfers the load from the uti lity to the
generator (after approx. 10 second delay). The Load
on Generator light comes on.

7. The ATS stays connected to the generator for 15
minutes (approx.). The utility must be acceptable for
15 minutes continuously. Then the load i s trans­ferred back to the utility. To bypass time delay, press
the Bypass Time Delay button.

8. After load retransfer to utility, the generator runs 5
minutes (without load), then shuts down. The
Generator Acceptable light goes off indicating that
the generator is off.

This completes the Func tional Test.

381333–319 A

6

generator runs

unloaded
for 5 min.

¥

electrical loads

switched back

to utility

Sequence of Operation --- Utility Failure

¡

generator

stops

utility acceptable

load on utility

Utility power good.

Electrical loads on utility

utility acceptable

load on utility

generator off

Utility fails

(longer than

3sec.)

utility off

load off

Series 185

light is on

light is off

©

start

generator

wait 15 min.

for utility

to stabilize

¤

utility

returns

generator
acceptable

utility
acceptable

load on generator

generator acceptable

waiting for utility

to return

observe
these
power
lights

utility off

load on generator

generator acceptable

£

electrical loads

switched to generator

observe
these
switch
lights

generator off

utility off

load on utility

generator
acceptable

wait 10 sec.

for generator

to warm up

generator

starting

¢

generator

acceptable

7

381333–319 A

TROUBLESHOOTINGSeries 185

This troubleshooting guide describes some of the simple
causes of problems with the installation of the automatic
transfer switch. Troubleshooting beyond the scope of this
guide should not be attempted by the installer. A licensed
electrician must perform all internal troubleshooting.
ASCO Power Technologies can be contacted at:
1–800–800–2726 or [e-mail]

ELECTROCUTION FLASH HAZARD Do not work
on the transfer switch until both the utility and
generator are off. Turn OFF both circuit breakers.

Problem

The Utility Acceptable light
does not come on when utility
power i s connected to the ATS.

The generator does not crank
when the utility source fails or
when the Transfer Test button is
pressed.

The generator cranks but does
not start and run when the util­ity source fails or when the
Transfer Test button is pressed.

The generator starts and runs
but the Generator Acceptable
light does not come on.

The generator starts and runs
but the ATS does not transfer
the load to the generator.

Cause and Solution

1. Verify that the utility feed is connected and that its circuit breaker is ON.

2. With ALL POWER OFF, verify that the utility feed is 220–240 V ac and 60 Hz.
Check DIP switch S2 actuator 2, and DIP S1 actuator 4. See Table D for voltage
and frequency settings.

3. With ALL POWER OFF, verify that the utility feed is wired to the terminal lugs
on the bottom of the transfer switch marked L1 and L5. See the wiring diagram.

4. With ALL POWER OFF, verify that the transfer switch harness is connected
properly to the controller (plug and receptacle tight).

1. Hold the Transfer Test button for at least 15 seconds.

2. Verify that the generator starting controls are set for automatic operation (not in
manual mode).

3. Verify that the generator battery is connected and that the battery voltage meets
the generator manufacturer’s recommendation.

4. Verify that the correct contact (normally open or normally closed) is being
utilized (see the generator manual).

5. With ALL POWER OFF, verify engine start low voltage wiring between the
controller terminal block and the generator. See the wiring diagram. Check that
the plug is properly seated in the receptacle on the controller.

1. Verify proper generator o peration (fuel in tank, oil level, spark plugs --- see
generator manual).

2. With ALL POWER OFF, verify engine start low voltage wiring between the
controller terminal block and the generator. See the wiring diagram. Check that
the plug is properly seated in the receptacle.

1. Verify that the generator feed i s connected and that its circuit breaker is ON.

2. With ALL POWER OFF, verify that the generator feed is 220–240 V ac and 60
Hz. Check DIP switch S2 actuator 2, and DIP S1 actuator 4. See Table D for
voltage and frequency settings.

3. With ALL POWER OFF, verify that the generator feed is wired to the terminal
lugs on the top of the transfer switch marked L2 and L6. See the wiring diagram.

4. With ALL POWER OFF, verify that the transfer switch harness is connected
properly to the controller (plug and receptacle tight).

5. Verify generator ac output (voltage and frequency --- see generator manual).

1. Verify that the Generator Accepted light is on. If it is off, see previous trouble­shooting problem. The AT S will not transfer the load to an unacceptable source.

2. With ALL POWER OFF, verify that the transfer switch harness is connected
properly to the controller (plug and receptacle tight).

381333–319 A

8

Problem Cause and Solution

The ATS does not i mmediately
transfer the load to the
generator.

The ATS transfers the load to
the generator, but the genera­tor bogs down (struggles or
slows down). The ATS retran­sfers back to the utility.

The generator stops after a
running for awhile. The ATS
retransfers back to the utility
(if acceptable).

The ATS does not retransfer
the load back to the utility.

The ATS retransfers the load
back to the utility but the
generator keeps running.

The generator exerciser does
not seem to work.

The generator exerciser does
not transfer the load to the
generator.

TROUBLESHOOTING

1. Verify that the Generator Accepted light is on. If it is off, see previous trouble-

shooting problem. The AT S will not transfer the load to an unacceptable source.

2. Wait approximately 10 seconds for the transfer to generator time delay. This

fixed delay allows the generator output to stabilize before a load is applied to i t.

3. Press the Bypass Time Delay butto n for immediate load transfer to the generator.

1. The generator may be overloaded. Check to see if the generator circuit breaker

tripped. Check the sum of the loads to be sure it does not exceed the capacity of
the generator. Some motor loads require three times more power for starting.

2. Check for short circuit in a connected load.

3. Observe the Load on Utility and Load on Generator lights.

1. Verify proper generator operation; it may have run o ut of fuel or shut down

because of low oil level (see generator manual).

2. The generator may be overloaded. Check to see if the generator circuit breaker

tripped. Check the sum of the loads to be sure it does not exceed the capacity of
the generator. Some motor loads require three times more power for starting.

3. Check for short circuit in a connected load.

4. Observe the Load on Utility and Load on Generator lights.

1. Verify that the Utility Accepted light is on. The ATS will not transfer the load to

an unacceptable source.

2. Wait approximately 15 minutes for the retransfer to utility time delay. The utility

must be acceptable for 15 minutes continuously.

3. Press the Bypass Time Delay button for immediate load retransfer to the utility.

1. Wait approximately 5 minutes for the unloaded running (engine cooldown) time

delay.

2. The engine cooldown fixed time delay is important to prevent generator damage.

1. Verify that the Automatic Generator Exerciser light is blinking. When the utility is

acceptable and the load is on t he utility, this light flashes the number of days until
the next exercise period. When the light is off, no exercise period is set. The
light is also off when the generator is running.

2. With ALL POWER OFF, verify that the exerciser is turned on. Check DIP switch

S1 actuator 7, and S2 actuator 10. See Table B for generator exerciser settings.

3. With ALL POWER OFF,checkthe9voltbattery. Replace,ifnecessary,witha

quality alkaline battery: Duracell MN1404, Everready 522, Panasonic 6AM6, or
equivalent. See Figure 5.

1. With ALL POWER OFF, verify that exercise with load is turned on. Check DIP

switch S1 actuator 8. See Table B for generator exerciser settings.

(continued)

Series 185

9

381333–319 A

Series 185

INDEX

A

Automatic Generator Exerciser, light,

2

B

battery,clock,3

buttons, push, 2

Bypass Time Delay, button, 2, 6

C

cable spacers, 1

catalog number, inside cover

clock battery, 3

connections

electrical power, 1
engine control contact, 1

contacts

engine control, 1

control features, remote, 5

controller, 2–5

D

DIP switches, 3–5

dropout, 4

E

electrical operation, 2, 6

electrical power connections, 1

engine exerciser, 3

engine starting contacts, 3

F

features, see control features

frequency, pi ckup and dropout, 4

functional test, 6

G

generator

frequency, 4
settings, 4
starting contacts, 3
voltage, 4

GeneratorAcceptable,light,2,7

ground connection, inside cover

H

handle, maintenance, 6

warning, 6

harness, inside cover

HELP

800–800–2726 (ASCO)
[e-mail]

I

indicator lights, 2

installation, 1

insulator, backing piece, 1

illustration of, 6
warning, 6

L

labels,

operator, transfer switch, 6
rating, cover

lights,2,7

Load on Generator, light, 2, 7

Load on Utility, light, 2, 7

M

manual operation, 6

illustration of, 6
warning, 6

mounting, 1

O

operation

electrical, 6
manual, 6
sequence of, 7

override momentary outages, 4

P

pickup, 4

problem, 8–9

R

rating label, cover

remote control features, 5

bypass transfer time delay, 5
remote test, 5
remote transfer to emergency, 5

S

service,

800–800–2726 (ASCO)
[e-mail]

Set Engine Exerciser, button, 2, 3

settings

c h a n g i n g , 3 --- 5
f a c t o r y , 3 --- 5
frequency, 3, 4
phase, 4
time delay, 3, 4
voltage, 3, 4

source acceptable lights, 2

spacer, cable, 1

switches,DIP,3–5

T

TB7 generator start connections, 3

terminal block, 1

test, functional, 6

time delay

adjustment,3,4
gen–set cooldown, 4
how to change, 3
override momentary outages, 4
settings, 3–5
transfer to emergency, 4
transfer to normal, 4

timer (gen exerciser), how to set, 3

transfer switch position lights, 2

Transfer Test, button, 2, 6

troubleshooting, 8–9

U

unloadedrunning,gen.cooldown,4

Utility

failure, 7
frequency, 4
settings, 4
voltage, 4

Utility Acceptable, light, 2, 7

V

voltage, phase, 4

voltage, pickup & dropout settings, 4

voltage checks, 6

381333–319 A

Printed in U.S.A.

10

Copyright --- ASCO Power Technologies, L.P. 2008