Table of Contents
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Table of Contents
Related Manuals for Generac Power Systems Nexus Smart Switch
Summary of Contents for Generac Power Systems Nexus Smart Switch
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Page 1: Technical Manual
Technical Manual Nexus Smart Switch This manual should remain with the unit. -
Page 2: Table Of Contents
Table of Contents SAFETY RULES Safety Rules ..........Inside Front Cover General Information ..............2 SAVE THESE INSTRUCTIONS! Read the fol- 1.1 Introduction ................2 lowing information carefully before attempting 1.2 Unpacking .................. 2 to install, operate or service this equipment. 1.3 Equipment Description .............. -
Page 3: Safety Rules
Safety Rules These safety warnings cannot eliminate the hazards that they • Competent, qualified personnel should install, operate and ser- indicate. Common sense and strict compliance with the special vice this equipment. Adhere strictly to local, state and national instructions while performing the service are essential to prevent- electrical and building codes. -
Page 4: General Information
General Information INTRODUCTION • Any loads, including central air conditioners, can be controlled via a contactor that must be purchased separately. Up to four This manual has been prepared especially for the purpose of famil- contactors can be controlled by the load shed module. The LSM iarizing personnel with the design, application, installation, opera- supplies the 120 Vac to energize each contactor coil. -
Page 5: Transfer Switch Enclosure
Installation TRANSFER SWITCH CONNECTING POWER SOURCE ENCLOSURE AND LOAD LINES The standard switch enclosure is a National Electrical Manufacturer’s Association (NEMA) and UL 3R type. UL and NEMA 3R type enclo- sures primarily provide a degree of protection against falling rain ... -
Page 6: Connecting Start Circuit Wires
Installation CONNECTING LOAD SHED Before connecting wiring cables to terminals, remove any surface oxides from the cable ends with a wire brush. All power cables MODULE (LSM) CONNECTIONS should enter the switch next to transfer mechanism terminals. The LSM can control an air conditioner (24 Vac) directly or a sepa- If ALUMINUM conductors are used, apply corrosion inhibitor to rate contactor (120 Vac) which can control any load connected to conductors. -
Page 7: Auxiliary Contacts
Installation Figure 2.2 — Load Shed Module Connections Supply 0 Ground 0 Ground Contactor #1 Load #1 194 +12V 194 +12V 23 Transfer 23 Transfer Y wire NEUTRAL NEUTRAL Supply AIR 1 AIR 1 CONTACTOR CONTACTOR AIR 2 AIR 2 CONTACTOR CONTACTOR Contactor #2... -
Page 8: Operation
Operation FUNCTIONAL TESTS AND 3.2.1 CLOSE TO NORMAL SOURCE SIDE ADJUSTMENTS Before proceeding, verify the position of the switch by observing window “A” in Figure 3.1 on page 6. If window “A” reads “ON”, Following transfer switch installation and intercon- the contacts are closed in the normal position, no further action is nection, inspect the entire installation carefully. -
Page 9: Generator Voltage Checks
Measure across ATS terminal lugs E1 to E2; E1 to NEUTRAL and E2 to NEUTRAL. a. Frequency .......... 60-62 Hz b. Terminals E1 to E2 ......240-246 VAC c. Terminals E1 to NEUTRAL ....120-123 VAC d. Terminals E2 to NEUTRAL ....120-123 VAC Generac ® Power Systems, Inc. -
Page 10: Generator Tests Under Load
Operation GENERATOR TESTS UNDER TESTING LOAD SHED MODULE LOAD (LSM) Set the generator's main circuit breaker to its OFF or OPEN A Test pushbutton is provided on the bottom of the LSM to test the position. operation of the tested functions. The Test button will work when the ATS is in the Utility or the Generator position. -
Page 11: Electrical Data
Electrical Data Interconnection Drawing No. 0H7453-C... - Page 12 Electrical Data Wiring Diagram/Schematic Drawing No. 0H7257-C...
- Page 13 Electrical Data Wiring Diagram/Schematic Drawing No. 0H7257-C...
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Page 14: Exploded Views & Parts Lists
Exploded Views & Parts Lists 400A Assembly Drawing No. 0H7267$-C Parts List on page 14. - Page 15 Exploded Views & Parts Lists 400A Assembly Drawing No. 0H7267$-C Parts List on page 14.
- Page 16 Exploded Views & Parts Lists 400A Assembly Drawing No. 0H7267$-C ITEM PART NO. QTY. DESCRIPTION 0D7294 XFER SW-W 400A600V2P 0A7822 LUG, SLDLSS 600/250-1/0X1/4-28 026902 SCREW TAPTITE #8-32X1/4 BP 0C7907J COVER LUG 2P 400AMP 024526 SCREW HHTT 5/16-18 X 3/4 CZ 057329 LUG, SOLDERLESS 350-#6X13/32 AL/CU 027482...
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Page 17: Installation Diagram
Installation Diagram Drawing No. 0F6401... -
Page 18: Notes
Notes... - Page 19 Notes...
- Page 20 Part No. 0H7443 Revision C (08/05/11) Printed in U.S.A.
- Page 22 0D7294 XFER SW-W 400A600V2P 0A7822 LUG, SLDLS S 600/250-1/0X1/4-28 026902 SCREW TAPTITE #8-32X1/4 BP 0C7907J COVER LUG 2P 400AMP 024526 SCREW HHTT 5/16-18 X 3/4 CZ 057329 LUG, SOLDERLESS 350-#6X13/32 AL/CU 027482 WASHER SHAKEPROOF EXT 5/16 STEEL 022097 WASHER LOCK M6-1/4 0C8275 SCREW PPHM DSEMS M4-.7 X 10 ZNC (1)10...
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