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Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS

381333-406 ASCO Power Technologies Page 1

DANGER is used in this manual to warn of a

hazard situation which, if not avoided, will result in

death or serious injury.

WARNING is used in this manual to warn of a

hazardous situation which, if not avoided, could

result death or serious injury.

CAUTION is used in this manual to warn of a

hazardous situation which, if not avoided, could

result in minor or moderate injury.

Rating Label

Each 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 person injury or

serious equipment damage.

An experienced licensed electrician must install the transfer

switch.

Installation

These transfer switches are factory wired and tested.

Installation requires mounting, connecting service cables, and

connecting engine start and auxiliary control circuits (if

required.).

Supporting Foundation

The supporting foundation for the enclosure must be level and

straight. Refer to the applicable enclosure outline drawing

included with the transfer switch for all mounting details

including door opening space.

If bottom cable entry is used, the foundation must be prepared

so that the conduit stubs are located correctly. Refer to the

enclosure outline drawing for specified area and location.

Provide cable bending space and 1 inch minimum clearance to

live metal parts. When a concrete floor is poured, use

interlocking conduit spacer caps or a wood or metal template

to maintain proper conduit alignment.

Mounting

Refer to the outline and mounting diagram and mount the

transfer switch according to details and instructions shown on

the diagram. Mount it vertically to a rigid supporting

structure. Level all mounting points by using flat washers

behind the holes to avoid distortion of the transfer switch.

Protect the transfer switch from construction grit

and metal chips to prevent malfunction or

shortened life of the transfer switch.

381333-406

Refer to the outline and wiring drawings provided

with the 3ATS, 3NTS, 3ADTS, or 3NDTS for all

installation and connection details and accessories.

DANGER

WARNING

CAUTION

Refer to User’s Guide 381333-400 for the Goup G

Controller status display messages, time delays,

pickup and dropout settings, and adjustments.

3ATS, 3ADTS, 3NTS, 3NDTS

G-design 1600-3000 A Transfer Switches

Installation Manual

WARNING

NOTIC

INSTALLATION

Mounting ..........................................................1

Power Connections .........................................2

Engine Starting Contacts.................................2

FUNCTIONAL TEST

1- Manual Operation........................................3

2- Voltage Checks ...........................................4

3- Electrical Operation .....................................6

TESTING & SERVICE

Transfer Test ...................................................6

Preventive Maintenance ..................................6

Manual Load Transfer .....................................6

TROUBLESHOOTING ....................................7

INDEX..............................................................8

Table of Contents

Summary of content (8 pages)

PAGE 1
Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual ! 3ATS, 3ADTS, 3NTS, 3NDTS G-design 1600-3000 A Transfer Switches DANGER Table of Contents DANGER is used in this manual to warn of a hazard situation which, if not avoided, will result in death or serious injury. ! WARNING WARNING is used in this manual to warn of a hazardous situation which, if not avoided, could result death or serious injury.
PAGE 2
ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual Line Connections Engine Starting Contacts Refer to the wiring diagram provided with the transfer switch. All wiring must be made in accordance with the National Electrical Code and local codes. The engine control contact connections (if used) are located on the transfer switch for 3ATS & 3NTS or in the upper right side of the enclosure for 3ADTS & 3NDTS. Connect signal wires to appropriate terminals as specified in Table A and shown in Figure 1.
PAGE 3
Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Functional Test maintenance h dl The functional test consists of three checks: manual operation, voltage checks, and electrical operation. NOTICE Do these checks in the order presented to avoid damaging the transfer switch. 1 – Manual Operation A maintenance 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). Figure 3.
PAGE 4
ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual 1 Close the normal source circuit breaker. The normal source accepted and the load on normal lights should come on. Use an accurate voltmeter to check phase to phase and 2 phase to neutral voltages present at the transfer switch normal source terminals.
PAGE 5
Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS 1 2 Observe these lights Press this button Figure 7. Transfer button and indicator lights. The normal source must be available and the generator must be ready to start. Check that the normal source accepted light is on. For 3ATS & 3ADTS press the transfer button. The engine should start and run within 15 seconds. For 3NTS & 3NDTS the generator must be started manually at the generator. The emergency source accepted light should come on.
PAGE 6
ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual Testing & Service Replacement Parts Transfer Test Operate the transfer switch at least once a month by following the Electrical Operation procedure on page 6. When ordering replacement parts provide the Serial No., Bill of Material No. (BOM), and Catalog No. from the transfer switch nameplate. In the US call 800-800-2726 (ASCO) or contact customercare@asco.com.
PAGE 7
Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Troubleshooting Check in Numerical Sequence Problem 1 Operation 2 Generator 3 Voltage For 3ATS & 3ADTS the enginegenerator set does not start when the transfer test button is pressed or when the Normal source fails. The outage must be long enough to allow for the feature 1C time delay plus engine cranking and starting time. Starting control must be in automatic position. Batteries must be charged and connected.
PAGE 8
ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual INDEX A alert light, 7 see User’s Guide 381333-400 ASI is ASCO Services Inc. 800-800-2726(ASCO) customercare@asco.