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Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS
3ATS, 3ADTS, 3NTS, 3NDTS
Installation Manual
G-design 1600-3000 A Transfer Switches
! DANGER
Table of Contents
DANGER is used in this manual to warn of a
INSTALLATION
hazard situation which, if not avoided, will result in
Mounting..........................................................1
death or serious injury.
Power Connections .........................................2
Engine Starting Contacts.
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ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual Engine Starting Contacts Line Connections Refer to the wiring diagram provided with the transfer switch. The engine control contact connections (if used) are located on All wiring must be made in accordance with the National the transfer switch for 3ATS & 3NTS or in the upper right Electrical Code and local codes. side of the enclosure for 3ADTS & 3NDTS. Connect signal wires to appropriate terminals as specified in Table A and shown
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Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Functional Test maintenance The functional test consists of three checks: manual hdl 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 (op
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ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual Close the normal source circuit breaker. The normal source accepted and the load on normal lights should come on. 1 Use an accurate voltmeter to check phase to phase and 2 phase to neutral voltages present at the transfer switch normal source terminals. Close the emergency source circuit breaker. (Start generator, if necessary.) The emergency source accepted light should come on. 3 Normal Source Load on Load on Emergency Acc
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Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS The normal source must be available and the generator must be ready to start. Check that the normal source accepted light is on. 1 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. 2 The emergency source accepted light should come on. For 3ATS & 3ADTS the transfer switch should transfer to Observe Press this the
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ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual Testing & Service Replacement Parts When ordering replacement parts provide the Serial No., Bill Transfer Test of Material No. (BOM), and Catalog No. from the transfer Operate the transfer switch at least once a month by following switch nameplate. In the US call 800-800-2726 (ASCO) or the Electrical Operation procedure on page 6. contact customercare@asco.com. Preventive Maintenance Manual Load Transfer Reasonable care in preventi
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Installation Manual ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Troubleshooting Check in Numerical Sequence Problem 1 Operation 2 Generator 3 Voltage Starting control must be The outage must be long For 3ATS & 3ADTS the engine- in automatic position. enough to allow for the generator set does not start when Batteries must be feature 1C time delay plus - the transfer test button is pressed charged and connected. engine cranking and starting or when the Normal source fails. Check wiring to the
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ASCO 3ATS, 3ADTS, 3NTS, 3NDTS Installation Manual INDEX A I S alert light, 7 inphase transfer feature, 5, 7 source acceptable lights, 4, 5 see User’s Guide 381333-400 inspection, 6 starting contacts, 3 ASI is ASCO Services Inc. installation, 2 starting control, 7 800-800-2726(ASCO) insulator backing piece, 2 starting problem, 4, 7 customercare@asco.com WARNING, 2 stopping problem, 7 automatic operation, 3ATS, 5 L T auxiliary circuits, 2 lights, 4, 5, 7 terminals, 2, 3 B line c
