Installation & Operators Manual
100 Amp NEMA 3R Automatic Transfer Switch
Part No. 206620GS Rev. A (04/25/2008)
with AC Power Control Module
Thank you for your purchase of this Briggs & Stratton Power Products Automatic Transfer Switch. This product is intended for use with Briggs & Stratton Home Standby Generator sets and therefore may not function with generators produced by other manufacturers. Seek a qualified electrical professional to determine applicability of this equipment to generators aside from those manufactured by Briggs & Stratton. This is an optional home standby system which provides an alternate source of electric power and to serve loads such as a gas furnace, refrigeration and communication systems that, when stopped during any power outage, could cause discomfort, or the like. This product does not qualify for emergency standby as defined by NFPA 70 (NEC). This manual contains safety information to make you aware of the hazards and risks associated with transfer switches and how to avoid them. Briggs & Stratton has made every effort to provide for a safe, streamlined and cost-effective installation. Each installation is unique, it is impossible to know of and advise of all conceivable procedures and methods by which installation might be achieved. We do not know all possible hazards and/or the results of each method or procedure. Save these instructions for future reference. This transfer switch requires installation before use. Refer to the Installation section of this manual for instructions on installation procedures. Only licensed electrical contractors should install transfer switches. Installations must strictly comply with all applicable federal, state and local codes, standards and regulations.

Where to Find Us

You never have to look far to find Briggs & Stratton support and service for your transfer switch. There are thousands of Briggs & Stratton authorized service dealers worldwide who provide quality service. You can also find the nearest Authorized Service Dealer in our dealer locator map on the Internet at BRIGGSandSTRATTON.COM.
Date of Purchase Transfer Switch
Model Number Model Revision Serial Number
Briggs & Stratton Power Products Group, LLC 900 North Parkway Jefferson, WI 53549 Copyright 2008 Briggs & Stratton Power Products Group, LLC. All rights reserved. No part of this material may be reproduced or transmitted in any form by any means without the express written permission of Briggs & Stratton Power Products Group, LLC.

BRIGGSandSTRATTON.COM

Table of Contents
Important Safety Instructions. 4 Introduction. 5
For the Home Owner. 5 Owner Orientation. 5 Installer Responsibilities. 5 Equipment Description. 5 Unpacking. 6 Mounting Guidelines. 6 System Setup. 7 Supervisory Control Wiring. 7 Wiring Interconnections. 8

Installation. 6

Controls. 10 Operation. 10
Testing the Automatic Transfer Switch. 10
Maintenance . 10 Troubleshooting. 11
Transfer Switch Installation Schematic. 12 Transfer Switch Installation Diagram . 13
Warranty. 14 Specifications. 16

Espaol

Franais
Save These Instructions Important Safety Instructions
T his is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. The safety alert symbol ( ) is used with a signal word (DANGER, CAUTION, WARNING), a pictorial and/or a safety message to alert you to hazards. DANGER indicates a hazard which, if not avoided, will result in death or serious injury. WARNING indicates a hazard which, if not avoided, could result in death or serious injury. CAUTION indicates a hazard which, if not avoided, might result in minor or moderate injury. NOTICE indicates a situation that could result in equipment damage. Follow safety messages to avoid or reduce the risk of injury or death. The manufacturer cannot possibly anticipate every possible circumstance that might involve a hazard. The warnings in this manual, and the tags and decals affixed to the unit are, therefore, not all-inclusive. If you use a procedure, work method or operating technique that the manufacturer does not specifically recommend, you must satisfy yourself that it is safe for you and others. You must also make sure that the procedure, work method or operating technique that you choose does not render the transfer switch unsafe.

warning

Failure to properly ground transfer switch can result in electrocution. DO NOT touch bare wires or receptacles. DO NOT use transfer switch with worn, frayed, bare or otherwise damaged wiring. DO NOT handle electrical cords while standing in water, while barefoot, or while hands or feet are wet. If you must work around a unit while it is operating, stand on an insulated dry surface to reduce shock hazard. DO NOT allow unqualified persons or children to operate or service transfer switch. In case of an accident caused by electrical shock, immediately shut down the source of electrical power and contact local authorities. Avoid direct contact with the victim.
Transfer Switch contains hazardous voltage that can cause personal injury or death. Installing or removing current transformer when generator is operating will produce hazardous voltage that can cause personal injury or death. Despite the safe design of the transfer switch, operating this equipment imprudently, neglecting its maintenance or being careless can cause possible injury or death. DO NOT install, remove or open current transformer circuit without removing 15 amp fuse in generator and placing generator switch in OFF position. To reduce risk of electrical shock or personal injury, disconnect all sources of supply voltage before servicing.
Only qualified electricians should attempt installation of this system, which must strictly comply with applicable codes, standards and regulations.
Low voltage wire cannot be installed in same conduit as power voltage wiring. Failure to follow above warning could cause personal injury, damage and/or malfunction of equipment.

notice

Improper treatment of transfer switch can damage it and shorten its life. Use transfer switch only for intended uses. If you have questions about intended use, ask dealer or contact Briggs and Stratton Power Products. Do not expose transfer switch to excessive moisture, dust, dirt, or corrosive vapors. Remain alert at all times while working on this equipment. Never work on the equipment when you are physically or mentally fatigued. If connected devices overheat, turn them off and turn off their circuit breaker/fuse.

Introduction

Your Briggs & Stratton Transfer Switch is supplied with this combined Installation and Operators Manual. This is an important document and should be retained by the owner after the installation has been completed. Every effort has been expended to make sure that the information in this manual is both accurate and current. However, the manufacturer reserves the right to change, alter or otherwise improve the system at any time without prior notice.
Installer Responsibilities
Read and observe the safety rules. Read and follow the instructions given in this manual. Check federal, state and local codes and authority having jurisdiction, for questions on installation. Ensure generator is not overloaded with selected loads. If you need more information about the transfer switch, contact your local Authorized Service Center.

Equipment Description

The transfer switch is intended to transfer the entire load of normal residential installations when used with the supervisory contacts provided. The load is connected either to utility power (normal) or home standby power (generator). The transfer switch monitors utility and generator voltages and will automatically connect to the appropriate source of power. Major components of the transfer switch are a 2 pole double throw transfer switch, control circuit board, fused utility terminals and interconnecting wiring. The control board also has two inputs for current transformers that sense generator current. The transfer switch is solenoid-operated from utility or generator inputs and contains suitable mechanical and electrical interlock switches to eliminate the possibility of connecting the utility service to the generator output. It has ratings capable of switching full utility power into the residence. In addition, a manual override lever is provided for the transfer function. The control circuit board has active circuits sensing utility and generator voltages. It creates a signal for the generator start-up, switch transfer, and retransfer when utility is restored. The control board also contains red and green LEDs indicating the power sources available and two relay operated contacts that provide supervisory control of external loads. When protected by one of the type circuit breakers described below, this transfer switch is rated for use on a circuit capable of delivering not more than 22,000 rms symmetrical, 240 volts max. Cutler-Hammer Type QCHW Cutler-Hammer Type GB, GHB, GC, GHC Cutler-Hammer Type FD, GD, HFD Square D Type QOM1, QOM2, QOM1-VH, QOM2-VH Square D Type Q2-H, Q2H, QDL GE Type THHQB, THHQC, THHQL, THQD, TQDL, THQDL Siemens Type HED4

For the Home Owner

To help you make informed choices and communicate effectively with your installation contractor(s), Read and understand the Owner Orientation Section of this manual before contracting or starting your transfer switch installation. To arrange for proper installation, contact the store at which you purchased your Briggs & Stratton Transfer Switch, your dealer, or your utility power provider. The Transfer Switch Warranty is VOID unless the system is installed by a licensed electrical professional.

Owner Orientation

The illustrations are for typical circumstances and are meant to familiarize you with the installation options available with your transfer switch. Local codes, appearance, and distances are the factors that must be considered when negotiating with an installation professional. As the distance from the existing electrical service increases, compensation in wiring materials must be allowed for. This is necessary to comply with local codes and overcome electrical voltage drops. The factors mentioned above will have a direct effect on the overall price of your transfer switch installation. NOTE: Your installer must check local codes AND obtain permits before installing the system. Read and follow the instructions given in this manual. Follow a regular schedule in caring for and using your transfer switch, as specified in the manual.

Installation

Unpacking
Delivery Inspection After removing the carton, carefully inspect the transfer switch components for any damage that may have occurred during shipment. IMPORTANT: If loss or damage is noted at time of delivery, have the person(s) making delivery note all damage on the freight bill and affix his signature under the consignors memo of loss or damage. If loss or damage is noted after delivery, contact the carrier for claim procedures. Missing or damaged parts are not warranted. Shipment Contents Automatic Power Transfer Switch Current Transformer Kit Installation and Operators Manual Typical

Control Wiring

Mounting Guidelines
The Automatic Transfer Switch is enclosed in a NEMA Type3R enclosure suitable for indoor/outdoor use. Guidelines for mounting the Automatic Transfer Switch include: Install the switch on a firm, sturdy supporting structure. The switch must be installed with minimum NEMA 3R hardware for conduit connections. To prevent switch contact distortion, level and plumb the enclosure. This can be done by placing washers between the switch enclosure and the mounting surface. NEVER install the switch where any corrosive substance might drip onto the enclosure. Protect the switch at all times against excessive moisture, dust, dirt, lint, construction grit and corrosive vapors. A typical installation of the Automatic Power Transfer Switch is depicted below. An alternative installation of the Automatic Power Transfer Switch is also depicted below. It is best if the transfer switch is mounted near the utility meter, either inside or outside. Discuss layout suggestions/ changes with the owner before beginning the system installation process.
Service Disconnect Watt Hourmeter

Contactor

Hot Water Heater

Main Distribution Panel

Transfer Switch Generator
Air Conditioner Branch Circuits Disconnect Switch

Alternate

Control Wiring Main Distribution Panel

Watt Hourmeter

Emergency Load Center

Transfer Switch

Generator

Branch Circuits Disconnect Switch

Air Conditioner

System Setup
You must perform the following before operating the system: If generator is installed in an area regularly subjected to temperatures below 4C, select a 50 second warm up time by moving jumper installed on JP2 from 20 position to 50 position. Set the DPSW1 and DPSW2 dipswitches on the control module to match the KW rating of the Home Standby Generator set as described in Setting Dipswitches. DPSW1 Dipswitch DPSW2 Dipswitch JP2
The On position for the dipswitches is the switch number ON THE CONTROL BOARD, not on the switch. For example, on a 27,000 Watt generator that runs on natural gas (NG), set DPSW2 dipswitch 20 to On position. Set DPSW1 dipswitch 7 to On position. 20,000 plus 7000 equals 27,000 Watts.

CT1 & CT2 Connectors

Supervisory Control Wiring
1. Terminal strip on control module in transfer switch has four connections for customer use. There are two sets of Normally Closed contacts available. They will be activated when generator power is required. These can be used for supervisory control of large connected loads on generator. Loads will be allowed to operate if there is enough generator power available. NOTE: There are two wireways provided to keep the supervisory loads separated from each other. 2. Terminals A-A on control module are rated for 24 VAC and air conditioner contactor control. Contacts are connected in series with the air conditioner contactor control circuit.

Supervisory Contacts

Setting Dipswitches Dipswitches are used to adjust control board operation based on generator capacity and fuel source. Sum of DSPW1 and DPSW2 are set to correspond to system kW rating. Dipswitch DPSW1 has units of 1,000 Watts; Dipswitch DPSW2 has units of 10,000 Watts. IMPORTANT: Set only one switch to On position on each dipswitch.

A A B B

Air Conditioner Contactor 24 VAC
3. Terminals B-B on control module are rated for 5 Amp 250 VAC and installer supplied contactor to control a large load. Example: electric hot water heater. Contacts are connected in series with the contactor control circuit. Contactor 230 VAC 230 VAC
Use extreme caution when setting dipswitches or damage to control board will result. Use a pencil or small piece of plastic to set the dipswitch. NEVER use a screwdriver or any type of metal object to set dipswitches.
4. Tighten all wire connections/fasteners to proper torque. See inside transfer switch enclosure for proper torque values.

Wiring Interconnections

All wiring must be the proper size, properly supported and protected by conduit. Complete the following connections between the transfer switch, main distribution panel, utility power and generator, as shown on the next page.
Low voltage wire cannot be installed in same conduit as power voltage wiring. Failure to follow above warning could cause personal injury, damage and/or malfunction of equipment. High Voltage Wiring 1. Ensure utility power is turned OFF. Connect utility feeder conductors to transfer switch terminals marked UTILITY CONNECTION. Connect utility live to N1 and utility neutral to N2. 2. Connect distribution panel feeder conductors to transfer switch terminals marked LOAD CONNECTION. Connect live to T1 and neutral to T2. 3. Connect distribution panel Ground conductor to the transfer switch GND terminal. NOTE: Assure grounding electrode conductor is connected and bonded per applicable federal, state and local codes, standards and regulations. Generator feeder conductors are shown below: NOTE: This connection grounds the neutral side of the generator output, and is required for correct operation of protection devices in the installation. 8. Plug in current transformer leads into CT1 and CT2 on control module. 9. Connect generator Ground conductor from the control panel to the transfer switch GND terminal. NOTE: Assure generator equipment grounding conductor is connected per applicable federal, state and local codes, standards and regulations. 10. Connect generator UTILITY 230 VAC terminals to transfer switch UTILITY 230 VAC terminals (F1, F2). Use minimum 2.5mm2 conductors. NOTE: Replace with fuse of same type and rating, 600 volt, 2 amp. 11. Tighten all wire connections/fasteners to proper torque as shown below. Low Voltage Wiring 1. Using 1.0mm2 twisted pair conductors, no greater than 60 m in length, connect Tx Rx and Tx Rx Ground from the generator control panel to the GND and T/R on the transfer switch control board. 4. Connect generator feeder conductor from the generator circuit breaker terminal E1 to transfer switch terminal marked GENERATOR CONNECTION terminal E1 (see diagram at top of next column). This conductor should pass through hole of current transformer before making the connection. 5. Connect other generator feeder conductor from the generator circuit breaker terminal E2 to transfer switch terminal marked NEUTRAL. This conductor should pass through hole of current transformer before making the connection. 6. Connect a cable from transfer switch terminal marked Neutral to transfer switch terminal marked GENERATOR CONNECTION terminal E2. 7. Connect a cable from transfer switch terminal marked Neutral to transfer switch terminal marked Ground.

2. Tighten all wire connections/fasteners to proper torque as shown on next page.

To Utility Power

Ground

Utility Connection

Generator Tx Rx and Tx Rx Ground Connection
Generator Connection Load Connection
Wireway Supervisory Contacts
Neutral Terminal Ground Terminal

CT 2 CT 1

230V Generator Connection

Tx Rx GND

Connector tightening torques shall be as follows: Utility Generator Neutral 5.5 Nm 5.5 Nm 12.5 Nm Ground Control Fuseblocks 5.5 Nm 1.4 Nm 1.4 Nm
Use oxide inhibitor on all aluminum terminations. All terminal and bus lugs are suitable for copper wire of 60/75C rating.

E1 GND

To Generator
T1 T2 Ground Ground Bus Main

Controls

Other than a Manual Override lever, there are no operator controls because this is an automatic transfer switch. The manual override is to be used only by licensed professionals.
Engine Warm-Up Time delay to allow for engine warm-up before transfer is fixed at 20 seconds or 50 seconds (see System Setup). Transfer Transfer from utility to generator supply occurs after voltage is above set levels. Minimum engine run time is 5minutes after transfer. Utility Pickup Voltage pickup level is 80 percent of nominal voltage. Retransfer Retransfer from generator to utility supply is approximately 10seconds after utility voltage supply is above pickup level and minimum run time is completed. Engine Cool Down Engine will run for 60 seconds after retransfer.

Operation

To select automatic transfer operation, do the following: 1. Set service disconnect switch that sends utility power to transfer switch contactor to On position. 2. Set generators main circuit breaker to its On position. 3. Install 15 Amp fuse in control panel on generator. 4. Set generator system AUTO/OFF switch to AUTO position. The system will now be in automatic operation mode. When the generator is providing power to the transfer switch, the controller is constantly monitoring generator power. If the air conditioner is called to run, and there is sufficient generator power available, the controller will close contacts A-A to air conditioner contactor. Contacts B-B will open before contacts A-A close. If loads are too great for generator, contacts A-A and/or B-B will open. When air conditioning is not needed, A-A will open. If enough power is available, B-B will close.

Maintenance

The transfer switch is designed to be maintenance free under normal usage. However, inspection and maintenance checks should be made on a regular basis. Maintenance will consist mainly of keeping the transfer switch clean. Visual inspections should be done at least once a month. Access to transfer switch must not be obstructed. Keep 92 cm clearance around transfer switch. Check for an accumulation of dirt, moisture and/or corrosion on and around the enclosure, loose parts/hardware, cracks and/or discoloration to insulation, and damaged or discolored components. Exercise the transfer switch at least once every three months as described in the previous section Testing the Automatic Transfer Switch unless a power outage occurs and Home Generator System has gone through automatic sequence. Allow generator to run for at least 30 minutes. Contact a licensed electrical professional to inspect and clean the inside of your transfer switch at least once a year. Reinstall barrier after service or maintenance.
Testing the Automatic Transfer Switch
Turn the service disconnect feeding the transfer switch contactor to the Off position. The Automatic Sequence of the system will follow. To go back to utility power, turn the service disconnect to the On position. Utility Fail The Home Standby Generator set senses when utility voltage is below 70 percent of nominal. Engine start sequence is initiated after 6 second time delay.

Troubleshooting

Problem
Automatic transfer switch does not transfer to generator Automatic transfer switch does not transfer to utility Generator is still running after switch transfers to utility power
1. Generator breaker open. 2. Generator voltage not acceptable. 1. Service disconnect breaker open. 2. Utility voltage not acceptable. Engine cool down period. 1. or B-B contacts not operating A-A correctly.

Correction

1. Reset generator circuit breaker. 2. Refer to generator manual. 1. Reset service disconnect breaker. 2. Wait for utility voltage to return to normal. Engine should stop after 1 minute. 1. Check A-A or B-B contacts for proper operation and/or check control wiring to external load. 2. Decrease load to generator. 3. Plug CT connectors into control module. 4. Contact local service center. 1. Wait five minutes for transfer switch to retransfer to utility power. 2. Check fuse(s) and replace if necessary. Replace with fuse of same type and rating, 600 volt, 2 amp.
Generator or supervised loads (air conditioner, etc.) are operating 2. Too much load on generator. improperly when generator is supplying 3. Current transformer not connected. power 4. Broken current transformer. Generator is still running after utility power is restored 1. Minimum engine run time has not elapsed. 2. Fuse(s) in transfer switch is defective.
Transfer Switch Installation Schematic

Transfer Switch Installation Diagram
BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC TRANSFERSWITCH OWNER WARRANTY POLICY
Effective November 1, 2005 replaces all undated Warranties and all Warranties dated before November 1, 2005

LIMITED WARRANTY

Briggs & Stratton Power Products Group, LLC will repair or replace, free of charge, any part(s) of the equipment that is defective in material or workmanship or both. Transportation charges on product submitted for repair or replacement under this warranty must be borne by purchaser. This warranty is effective for the time periods and subject to the conditions stated below. For warranty service, find the nearest Authorized Service Dealer in our dealer locator map at BRIGGSandSTRATTON.com. THERE IS NO OTHER EXPRESS WARRANTY. IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR FROM PURCHASE, OR TO THE EXTENT PERMITTED BY LAW. ANY AND ALL IMPLIED WARRANTIES ARE EXCLUDED. LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARE EXCLUDED TO THE EXTENT EXCLUSION IS PERMITTED BY LAW. Some states or countries do not allow limitations on how long an implied warranty lasts, and some states or countries do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state or country to country.
WARRANTY PERIOD Consumer Use Commercial Use 2 years None
The warranty period begins on the date of purchase by the first retail consumer or commercial end user, and continues for the period of time stated in the table above. Consumer use means personal residential household use by a retail consumer. Commercial use means all other uses, including use for commercial, income producing or rental purposes. Once equipment has experienced commercial use, it shall thereafter be considered as commercial use for purposes of this warranty. Equipment used for prime power in place of utility are not applicable to this warranty. NO WARRANTY REGISTRATION IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON PRODUCTS. SAVE YOUR PROOF OF PURCHASE RECEIPT. IF YOU DO NOT PROVIDE PROOF OF THE INITIAL PURCHASE DATE AT THE TIME WARRANTY SERVICE IS REQUESTED, THE MANUFACTURING DATE OF THE PRODUCT WILL BE USED TO DETERMINE THE WARRANTY PERIOD.

ABOUT YOUR WARRANTY

We welcome warranty repair and apologize to you for being inconvenienced. Any Authorized Service Dealer may perform warranty repairs. Most warranty repairs are handled routinely, but sometimes requests for warranty service may not be appropriate. For example, warranty service would not apply if equipment damage occurred because of misuse, lack of routine maintenance, shipping, handling, warehousing or improper installation. Similarly, the warranty is void if the manufacturing date or the serial number on the equipment has been removed or the equipment has been altered or modified. During the warranty period, the Authorized Service Dealer, at its option, will repair or replace any part that, upon examination, is found to be defective under normal use and service. This warranty will not cover the following repairs and equipment: Normal Wear: Outdoor Power Equipment, like all mechanical devices, needs periodic parts and service to perform well. This warranty does not cover repair when normal use has exhausted the life of a part or the equipment. Installation and Maintenance: This warranty does not apply to equipment or parts that have been subjected to improper or unauthorized installation or alteration and modification, misuse, negligence, accident, overloading, improper maintenance, repair or storage so as, in our judgment, to adversely affect its performance and reliability. This warranty also does not cover normal maintenance such as adjustments, cleaning and fuse replacement. Other Exclusions: This warranty excludes wear items or damage or malfunctions resulting from accidents, abuse, modifications, alterations, or improper servicing. Accessory parts are excluded from the product warranty. This warranty excludes failures due to acts of God and other force majeure events beyond the manufacturers control. Also excluded is used, reconditioned, and demonstration equipment. 198180E, Rev. C, 12/31/2006
BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC JEFFERSON, WI, USA

Reserved

Specifications
Maximum Load Current: . 100 Amps Rated AC Voltage. 250 Volts Poles. 2 Frequency . 50 Hz Fault Current Rating. 25,000 RMS Symmetrical Amperes Supervisory Contacts Rating: A-A Terminals. 24 Volt AC B-B Terminals. 5 Amp, 250 Volt AC, Pilot Duty Enclosure Type . NEMA 3R

Installation & Operators Manual
100 Amp NEMA 3R Automatic Transfer Switch
Part No. 202267GS Rev. A (11/06/2007)
with AC Power Control Module
Thank you for your purchase of this Briggs & Stratton Power Products Automatic Transfer Switch. This product is intended for use with Briggs & Stratton Home Standby Generator sets and therefore may not function with generators produced by other manufacturers. Seek a qualified electrical professional to determine applicability of this equipment to generators aside from those manufactured by Briggs & Stratton. This is an optional home standby system which provides an alternate source of electric power and to serve loads such as a gas furnace, refrigeration and communication systems that, when stopped during any power outage, could cause discomfort, or the like. This product does not qualify for emergency standby as defined by NFPA 70 (NEC). This manual contains safety information to make you aware of the hazards and risks associated with transfer switches and how to avoid them. Briggs & Stratton has made every effort to provide for a safe, streamlined and cost-effective installation. Each installation is unique, it is impossible to know of and advise of all conceivable procedures and methods by which installation might be achieved. We do not know all possible hazards and/or the results of each method or procedure. Save these instructions for future reference. This transfer switch requires installation before use. Refer to the Installation section of this manual for instructions on installation procedures. Only licensed electrical contractors should install transfer switches. Installations must strictly comply with all applicable federal, state and local codes, standards and regulations.

Where to Find Us

You never have to look far to find Briggs & Stratton support and service for your transfer switch. Consult your Yellow Pages. There are over 30,000 Briggs & Stratton authorized service dealers worldwide who provide quality service. You can also contact Briggs & Stratton Customer Service by phone at (800) 743-4115, or on the Internet at BRIGGSandSTRATTON.COM.
Transfer Switch Model Number Revision Serial Number

Date Purchased

Briggs & Stratton Power Products Group, LLC 900 North Parkway Jefferson, WI 53549 Copyright 2007 Briggs & Stratton Power Products Group, LLC. All rights reserved. No part of this material may be reproduced or transmitted in any form by any means without the express written permission of Briggs & Stratton Power Products Group, LLC.

Table of Contents

Important Safety Instructions. 4
Owner Orientation. 5 Installer Responsibilities. 5 Equipment Description. 5 Unpacking. 6 Mounting Guidelines. 6 Power Wiring Interconnections. 7 Supervisory Control Wiring. 8 System Setup. 9

Installation. 6

Controls. 9 Operation. 9
Testing the Automatic Transfer Switch. 9 Specifications. 10 Transfer Switch Schematic. 12 Transfer Switch Wiring Diagram. 13 Transfer Switch Exploded View & Parts List. 14
Maintenance . 10 Troubleshooting. 11

Warranty. 16

Espaol

Franais

Save These Instructions Important Safety Instructions
T his is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. The safety alert symbol ( ) is used with a signal word (DANGER, CAUTION, WARNING), a pictorial and/or a safety message to alert you to hazards. DANGER indicates a hazard which, if not avoided, will result in death or serious injury. WARNING indicates a hazard which, if not avoided, could result in death or serious injury. CAUTION indicates a hazard which, if not avoided, might result in minor or moderate injury. NOTICE indicates a situation that could result in equipment damage. Follow safety messages to avoid or reduce the risk of injury or death. The manufacturer cannot possibly anticipate every possible circumstance that might involve a hazard. The warnings in this manual, and the tags and decals affixed to the unit are, therefore, not all-inclusive. If you use a procedure, work method or operating technique that the manufacturer does not specifically recommend, you must satisfy yourself that it is safe for you and others. You must also make sure that the procedure, work method or operating technique that you choose does not render the transfer switch unsafe.

warning

Failure to properly ground transfer switch can result in electrocution. DO NOT touch bare wires or receptacles. DO NOT use transfer switch with worn, frayed, bare or otherwise damaged wiring. DO NOT handle electrical cords while standing in water, while barefoot, or while hands or feet are wet. If you must work around a unit while it is operating, stand on an insulated dry surface to reduce shock hazard. DO NOT allow unqualified persons or children to operate or service transfer switch. In case of an accident caused by electrical shock, immediately shut down the source of electrical power and contact local authorities. Avoid direct contact with the victim.
Transfer Switch contains hazardous voltage that can cause personal injury or death. Despite the safe design of the transfer switch, operating this equipment imprudently, neglecting its maintenance or being careless can cause possible injury or death.
Only qualified electricians should attempt installation of this system, which must strictly comply with applicable codes, standards and regulations.

notice

Improper treatment of transfer switch can damage it and shorten its life. Use transfer switch only for intended uses. If you have questions about intended use, ask dealer or contact Briggs and Stratton Power Products. Do not expose transfer switch to excessive moisture, dust, dirt, or corrosive vapors. Remain alert at all times while working on this equipment. Never work on the equipment when you are physically or mentally fatigued. If connected devices overheat, turn them off and turn off their circuit breaker/fuse.
Low voltage wire cannot be installed in same conduit as power voltage wiring. Failure to follow above warning could cause personal injury, damage and/or malfunction of equipment.

BRIGGSandSTRATTON.COM

Introduction
Your Briggs & Stratton Transfer Switch is supplied with this combined Installation and Operators Manual. This is an important document and should be retained by the owner after the installation has been completed. Every effort has been expended to make sure that the information in this manual is both accurate and current. However, the manufacturer reserves the right to change, alter or otherwise improve the system at any time without prior notice.
Installer Responsibilities
Read and observe the safety rules. Read and follow the instructions given in this manual. Check federal, state and local codes and authority having jurisdiction, for questions on installation. Ensure generator is not overloaded with selected loads. If you need more information about the transfer switch, call (800) 743-4115, between 8:00AM and 5:00PM CT.

Equipment Description

The transfer switches are intended to transfer essential circuits of normal residential installations when used with the supervisory contacts provided. The load is connected either to utility power (normal) or home standby power (generator). The transfer switch monitors utility and generator voltages and will automatically connect essential circuits to the appropriate source of power. These switches make it easy for a licensed electrician to complete a home standby installation. The transfer switch contains an automatic transfer switch and control circuitry, and up to 16 essential branch circuit breakers, all in one enclosure. Major components of the transfer switch are a 2 pole double throw transfer switch, control circuit board, fused utility terminals, branch circuit breakers and bus, and interconnecting wiring. The transfer switch is solenoid-operated from utility or generator inputs and contain suitable mechanical and electrical interlock switches to eliminate the possibility of connecting the utility service to the generator output. It has ratings capable of switching utility or generator power into the essential circuits. In addition, a manual override lever is provided for the transfer function. The control circuit board has active circuits sensing utility and generator voltages. It creates a signal for the generator start-up, switch transfer, retransfer when utility is restored, and generator cool-down periods. The control board also contains red and green LEDs indicating the power sources available and two relay operated contacts that provide supervisory control of external loads.

For the Home Owner

To help you make informed choices and communicate effectively with your installation contractor(s), Read and understand the Owner Orientation Section of this manual before contracting or starting your transfer switch installation. To arrange for proper installation, contact the store at which you purchased your Briggs & Stratton Transfer Switch, your dealer, or your utility power provider. The Transfer Switch Warranty is VOID unless the system is installed by a licensed electrical professional.

Owner Orientation

The illustrations are for typical circumstances and are meant to familiarize you with the installation options available with your transfer switch. Local codes, appearance, and distances are the factors that must be considered when negotiating with an installation professional. As the distance from the existing electrical service increases, compensation in wiring materials must be allowed for. This is necessary to comply with local codes and overcome electrical voltage drops. The factors mentioned above will have a direct effect on the overall price of your transfer switch installation. NOTE: Your installer must check local codes AND obtain permits before installing the system. Read and follow the instructions given in this manual. Follow a regular schedule in caring for and using your transfer switch, as specified in the manual.

Installation

Unpacking
Delivery Inspection After removing the carton, carefully inspect the transfer switch components for any damage that may have occurred during shipment. IMPORTANT: If loss or damage is noted at time of delivery, have the person(s) making delivery note all damage on the freight bill and affix his signature under the consignors memo of loss or damage. If loss or damage is noted after delivery, contact the carrier for claim procedures. Missing or damaged parts are not warranted. Shipment Contents Automatic Power Transfer Switch Current Transformer Kit Full complement of branch Circuit Breakers Installation and Operators Manual

Mounting Guidelines

The Automatic Transfer Switch is enclosed in a NEMA Type3R enclosure suitable for indoor/outdoor use. Guidelines for mounting the Automatic Transfer Switch include: Install the switch on a firm, sturdy supporting structure. The switch must be installed with minimum NEMA 3R hardware for conduit connections. To prevent switch contact distortion, level and plumb the enclosure. This can be done by placing washers between the switch enclosure and the mounting surface. NEVER install the switch where any corrosive substance might drip onto the enclosure. Protect the switch at all times against excessive moisture, dust, dirt, lint, construction grit and corrosive vapors. A typical installation of the Automatic Power Transfer Switch is depicted below. It is best if the transfer switch is mounted near the main distribution panel, either inside or outside. Discuss layout suggestions/ changes with the owner before beginning the system installation process.

Typical

Control Wiring

Watt Hourmeter

Hot Water Heater

Contactor

Main Distribution Panel

Transfer Switch

Generator
Air Conditioner Branch Circuits Essential Branch Circuits Disconnect Switch
Power Wiring Interconnections
All wiring must be the proper size, properly supported and protected by conduit. Utility and generator conduits must enter enclosure above circuit breaker bus in transfer switch. No conductors shall pass over top of control board. Branch circuit conduits must enter sides or bottom of enclosure adjacent to circuit breaker terminals. Do Not use large knockouts in bottom of enclosure.
Complete the following connections between the transfer switch, main distribution panel, utility power and generator, as shown below. 1. Ensure utility power is turned OFF. 2. Connect main distribution panel feeder conductors from installer-supplied two pole maximum 100 amps essential circuit breaker to transfer switch terminals marked UTILITY. 3. Connect utility Neutral feeder conductor to the transfer switch NEUTRAL terminal. 4. Connect main distribution panel GND to transfer switch GROUND terminal. 5. Connect all essential branch circuit wiring to appropriate circuit breakers in transfer switch. 6. Connect essential branch circuit Neutral conductors to transfer switch NEUTRAL terminals.
From Main Distribution Panel

From Generator

Utility Connection

Generator Connection

Supervisory Contacts Neutral Terminal Ground Bus To Essential Branch Circuits To Essential Branch Circuits

Ground Bus

Essential Branch Circuit Buss
7. Connect generator power supply conductors from the generators control panel to transfer switch terminals marked GENERATOR. Each conductor should pass through hole of current transformer before making connection. 8. Connect generator Neutral from the generator control panel to the transfer switch NEUTRAL terminal. 9. Connect generator Ground from the control panel to the transfer switch GND terminal. 10. Plug in current transformer leads into CT1 and CT2 terminals on control module. NOTE: Assure generator equipment grounding conductor is connected per applicable federal, state and local codes, standards and regulations. 11. Connect generator UTILITY 240 VAC terminals to transfer switch UTILITY 240 VAC terminals. Use minimum #14 AWG conductors. 12. Tighten all wire connections/fasteners to proper torque. See inside transfer switch enclosure for proper torque values.

Supervisory Control Wiring
The supervisory control terminal strip on the control module in the transfer switch has four connections for customer use. There are two sets of Normally Closed contacts available. They will be activated when generator power is required. These can be used for supervisory control of large connected loads on generator. Loads will be allowed to operate if there is enough generator power available. 1. Terminals A-A on control module are rated for 24VAC and air conditioner contactor control. Contacts are connected in series with the air conditioner contactor control circuit.
Air Conditioner Contactor 24 VAC
2. Terminals B-B on control module are rated for 1 Amp 125VAC and installer supplied contactor to control a large load. Example: electric hot water heater. Contacts are connected in series with the contactor control circuit. Contactor

Neutral 120 VAC

3. Tighten all wire connections/fasteners to proper torque. See inside transfer switch enclosure for proper torque values.

System Setup

You must perform the following before operating the system: If generator is installed in an area regularly subjected to temperatures below 40F (4C), select a 50 second warm up time by moving jumper installed on JP2 from 20 position to 50 position. Place the 2 position sliding switch on the control module in the NG or LP position, whichever is appropriate for your system. Place the 3 position sliding switch on the control module to match the KW rating of the Home Standby Generator set. 3 Position Switch 2 Position Switch

Operation

To select automatic transfer operation, do the following: 1. Set essential circuit breaker that sends utility power to transfer switch to On position. 2. Set generators main circuit breaker to its On position. 3. Install 15 Amp fuse in control panel on generator. 4A. If generator is equipped with a system ON/OFF switch, set switch to ON position. B. If generator is equipped with a AUTO/OFF/MANUAL switch, set switch to AUTO position. The system will now be in automatic operation mode. When the generator is providing power to the transfer switch, the controller is constantly monitoring generator power. If the air conditioner is called to run, and there is sufficient generator power available, the controller will close contacts A-A to air conditioner contactor. Contacts BB will open before contacts A-A close. If loads are too great for generator, contacts A-A and/or B-B will open. When air conditioning is not needed, A-A will open. If enough power is available, B-B will close.

CT1 & CT2 Connectors

Testing the Automatic Transfer Switch
Turn the essential circuit breaker feeding the transfer switch to the Off position. The automatic sequence will follow. To go back to utility power, turn the essential circuit breaker to the On position.

Supervisory Contacts

Utility Fail The Home Standby Generator set senses when utility voltage is below 70 percent of nominal. Engine start sequence is initiated after 6 second time delay. Engine Warm-Up Time delay to allow for engine warm-up before transfer is fixed at 20 seconds or 50 seconds (see System Setup). Transfer Transfer from utility to generator supply occurs after voltage is above set levels. Minimum engine run time is 5minutes after transfer. Utility Pickup Voltage pickup level is 80 percent of nominal voltage. Retransfer Retransfer from generator to utility supply is approximately 10seconds after utility voltage supply is above pickup level and minimum run time is completed. Engine Cool Down Engine will run for 60 seconds after retransfer.

Controls

The Manual Override lever is to be used only by licensed professionals. The essential branch circuit breakers are used in the same way as those supplied in the main distribution panel.

Maintenance

The transfer switch is designed to be maintenance free under normal usage. However, inspection and maintenance checks should be made on a regular basis. Maintenance will consist mainly of keeping the transfer switch clean. Visual inspections should be done at least once a month. Access to transfer switch must not be obstructed. Keep 3feet (92 cm) clearance around transfer switch. Check for an accumulation of dirt, moisture and/or corrosion on and around the enclosure, loose parts/hardware, cracks and/or discoloration to insulation, and damaged or discolored components. Exercise the transfer switch at least once every three months as described in the previous section Testing the Automatic Transfer Switch unless a power outage occurs and Home Generator System has gone through automatic sequence. Allow generator to run for at least 30 minutes. Contact a licensed electrical professional to inspect and clean the inside of your transfer switch at least once a year.

Specifications UL 1008 Listed Transfer Switch
Model 071007 Maximum Load Current: . 100 Amps Rated AC Voltage. 250 Volts Poles. 2 Frequency . 50/60 Hz Fault Current Rating. 22,000 RMS Symmetrical Amperes* Supervisory Contacts Rating: A-A Terminals. 24 Volt AC B-B Terminals. 1 Amp, 125 Volt AC, Pilot Duty Weight. 46 lbs. * Short circuit rating is limited to the lowest capacity of any device installed.

Troubleshooting

Problem
Automatic transfer switch does not transfer to generator Automatic transfer switch does not transfer to utility Generator is still running after switch transfers to utility power
1. Generator breaker open. 2. Generator voltage not acceptable. 1. Essential circuit breaker in main disconnect panel open. 2. Utility voltage not acceptable.

Correction

1. Reset generator circuit breaker. 2. Refer to generator manual. 1. Reset essential circuit breaker. 2. Wait for utility voltage to return to normal. Engine should stop after 1 minute. 1. Check A-A or B-B contacts for proper operation and/or check control wiring to external load. 2. Decrease load to generator. 1. Wait five minutes for transfer switch to retransfer to utility power. 2. Check fuse(s) and replace if necessary

Engine cool down period.

Generator or supervised loads (air 1. or B-B contacts not operating A-A conditioner, etc.) are operating correctly. improperly when generator is supplying power 2. Too much load on generator. Generator is still running after utility power is restored 1. Minimum engine run time has not elapsed. 2. Fuse(s) in transfer switch is defective.
Transfer Switch Schematic
TRANSFER SWITCH N1 UTILIT SUPPLY Y 240VAC N2 T1 ESSENTIA BRANCH L CIRCUIT BREAKER BUS T2 E1 GENER ATOR SUPP LY 240 VAC E2
NC N1 TO GENER ATOR UTILITY 240 VAC F1 FAMP FUSE N206

J3 J2 J1 J4

NC NO 128 E1

556 N1 127

CONTROL BOARD
Transfer Switch Wiring Diagram
FROM MAIN DISTRIBUTIONANEL P CONTRO BOARD L
N1 CT1 J6 J5 N2 NJ3 J2 J1 B B A A J4 CT2

TRANSFER SWITCH

128 E1 E2 E1 206

FUSE HOLDER

UTILIT Y 240 VAC

FROM GENER ATOR

Transfer Switch Exploded View & Parts List
Item Part # 1 NSP 2 NSP 3 195667GS 4 * 5 198725GS 6 * 7 * 8 193664GS 9 197279GS 10 197979GS 11 198722GS 12 198721GS 13 198723GS 14 NSP 15 204511GS 16 B4857GS 17 192151GS 18 NSP 19 NSP 20 B4986GS 21 NSP 22 * 23 205108GS 24 204433GS 25 190992GS 26 190984GS 27 192597GS 28 * 29 * 30 193159GS 31 * 32 * 33 * 34 204431GS 35 204432GS 36 202841GS 37 196355GS 38 197198GS 39 197294GS PartsNot Illustrated 202267GS 195728GS

Description ASSY, Enclosure BACKPANEL TRANSFER SWITCH, 100A HHS, Trilobular, #10 - 32 x 1/2 BREAKER Circuit WASHER, Ext. Tooth, #10 HHS, Trilobular, #6- 32 x 3/8 INSULATION, Dead Front CONTROL, Board SPACER, PCB Board, 1/2 BREAKER Circuit BREAKER Circuit BREAKER Circuit BUS, Double Rw Brkr Mntng COVER, Circuit Board FUSE FUSEHOLDER SPACER BAR, Neutral Connection DECAL, Ground GROUND BAR SCREW, Trilobular, #10 - 32 x 3/4 DECAL, 100A, ATS SPACER DECAL, Warning Shock DECAL, Fuse DECAL, Sensing, Utility WASHER, Lock 1/4 NUT, 1/4 - 20 DECAL, Reinstall PPHMS, 6-32x 3/8 HHS, Trilobular, #8- 32 x 3/8 WASHER, Lock #6 WIRE - R WIRE - R SUPPORT, Locking, Crct Brd DECAL, CT Warning DECAL, Wire Circuits DECAL, Contacts Rating
MANUAL, Operators CURRENT TRANSFORMER
* - Items without part numbers are common fasteners and available at local hardware stores.

Warranty

BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC TRANSFERSWITCH OWNER WARRANTY POLICY
Effective November 1, 2005 replaces all undated Warranties and all Warranties dated before November 1, 2005

LIMITED WARRANTY

Briggs & Stratton Power Products Group, LLC will repair or replace, free of charge, any part(s) of the equipment that is defective in material or workmanship or both. Transportation charges on product submitted for repair or replacement under this warranty must be borne by purchaser. This warranty is effective for the time periods and subject to the conditions stated below. For warranty service, find the nearest Authorized Service Dealer in our dealer locator map at BRIGGSandSTRATTON.com. THERE IS NO OTHER EXPRESS WARRANTY. IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR FROM PURCHASE, OR TO THE EXTENT PERMITTED BY LAW. ANY AND ALL IMPLIED WARRANTIES ARE EXCLUDED. LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARE EXCLUDED TO THE EXTENT EXCLUSION IS PERMITTED BY LAW. Some states or countries do not allow limitations on how long an implied warranty lasts, and some states or countries do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state or country to country.

WARRANTY PERIOD Consumer Use Commercial Use 3 years None
The warranty period begins on the date of purchase by the first retail consumer or commercial end user, and continues for the period of time stated in the table above. Consumer use means personal residential household use by a retail consumer. Commercial use means all other uses, including use for commercial, income producing or rental purposes. Once equipment has experienced commercial use, it shall thereafter be considered as commercial use for purposes of this warranty. Equipment used for prime power in place of utility are not applicable to this warranty. NO WARRANTY REGISTRATION IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON PRODUCTS. SAVE YOUR PROOF OF PURCHASE RECEIPT. IF YOU DO NOT PROVIDE PROOF OF THE INITIAL PURCHASE DATE AT THE TIME WARRANTY SERVICE IS REQUESTED, THE MANUFACTURING DATE OF THE PRODUCT WILL BE USED TO DETERMINE THE WARRANTY PERIOD.

ABOUT YOUR WARRANTY

We welcome warranty repair and apologize to you for being inconvenienced. Any Authorized Service Dealer may perform warranty repairs. Most warranty repairs are handled routinely, but sometimes requests for warranty service may not be appropriate. For example, warranty service would not apply if equipment damage occurred because of misuse, lack of routine maintenance, shipping, handling, warehousing or improper installation. Similarly, the warranty is void if the manufacturing date or the serial number on the equipment has been removed or the equipment has been altered or modified. During the warranty period, the Authorized Service Dealer, at its option, will repair or replace any part that, upon examination, is found to be defective under normal use and service. This warranty will not cover the following repairs and equipment: Normal Wear: Outdoor Power Equipment, like all mechanical devices, needs periodic parts and service to perform well. This warranty does not cover repair when normal use has exhausted the life of a part or the equipment. Installation and Maintenance: This warranty does not apply to equipment or parts that have been subjected to improper or unauthorized installation or alteration and modification, misuse, negligence, accident, overloading, improper maintenance, repair or storage so as, in our judgment, to adversely affect its performance and reliability. This warranty also does not cover normal maintenance such as adjustments, cleaning and fuse replacement. Other Exclusions: This warranty excludes wear items or damage or malfunctions resulting from accidents, abuse, modifications, alterations, or improper servicing. Accessory parts are excluded from the product warranty. This warranty excludes failures due to acts of God and other force majeure events beyond the manufacturers control. Also excluded is used, reconditioned, and demonstration equipment. 198180E, Rev. C, 12/31/2006