Briggs & Stratton 100 / 150 / 200 Installation Manual

Introduction

This product is designed for use with specific home standby generators and may not function with generators or remote modules produced by other manufacturers. Seek a qualified electrical professional to determine applicability of this equipment to equipment manufactured by others. When operated and maintained according to the instructions in this manual, your system will provide many years of dependable service.
This manual contains safety information to make you aware of the hazards and risks associated with this system and how to avoid them. We have made every effort to provide for a safe, streamlined and cost-effective installation. As 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 possible method or procedure. It is important that you read and understand these instructions thoroughly before attempting to install or operate this equipment. Save these original instructions for future reference.
This transfer switch and optional remote modules require professional installation before use. Refer to the Installation section of this manual and the installation instructions packaged with the remote modules for instructions on installation procedures. Only licensed electrical contractors should install transfer switches and remote modules. Installations must strictly comply with all applicable federal, state and local codes, standards and regulations. Your installer should follow the instructions completely.

Where to Find Us
You never have to look far to find Briggs & Stratton support and service for your system. Consult your Yellow Pages. There are many authorized service dealers who provide quality service. You can also contact Technical Service by phone at 800-743-4115 between 8:00 AM and 5:00 PM CT, or click on Find a Dealer at BRIGGSandSTRATTON.COM, which provides a list of authorized dealers.

For Future Reference
Please fill out the information below and keep with your receipt to assist in unit identification for future purchase issues.

Installation

We sincerely appreciate your patronage and have made significant effort to provide for a safe, streamlined and cost-effective installation. Because each installation is unique, it is impossible to know of and advise the trade of all conceivable procedures and methods by which installation might be achieved. Neither could we know of possible hazards and/or the results of each method or procedure.
For these reasons, only current licensed electrical professionals should attempt system installations. Installations must strictly comply with all applicable codes, industry standards and regulations.
Your equipment is supplied with this Installation Manual and a separate Operator's Manual. These are important documents and should be retained by the owner after the installation has been completed.
Every effort has been made 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.

Home Owner Responsibilities
To help you make informed choices and communicate effectively with your installation contractor(s), read and understand Owner Orientation before contracting or starting your equipment installation.
To arrange for proper installation, contact the store at which you purchased your equipment, your dealer, or your utility power provider.
The equipment warranty is VOID unless the system is installed by licensed electrical professionals.

Owner Orientation
The illustrations provided are for typical circumstances and are meant to familiarize you with the installation options available with your system.
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.
These factors will have a direct effect on the overall price of your equipment installation.
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 equipment, as specified in this manual.

Installing Dealer/Contractor Responsibilities

• Read and observe the Important Safety Instructions.
• Read and follow the instructions given in this manual.
• The installer may need to provide appropriate rated contactors based on loads to be controlled.
• 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 8:00 AM and 5:00 PM CT.

Equipment Description
The transfer switch is designed to transfer the selected loads found in 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.
These switches make it easy for a licensed electrician to complete a home standby installation. Service conduit and conductors can be wired directly from the watt-hour meter to the transfer switch. A separate disconnect and associated wiring is not required when installed per applicable federal, state and local codes, standards and regulations.
Major components of the transfer switch are a 2 pole utility disconnect circuit breaker, a 2 pole generator disconnect circuit breaker, 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. These components are housed in a NEMA 3R enclosure that is suitable for both indoor and outdoor installations.
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 full utility power into the residence. In addition, a manual override lever is provided for the transfer function.
The control board has active circuits sensing utility and generator voltages. It creates a signal for generator start-up, switch transfer and retransfer when utility is restored. The control board also contains red and green LED's indicating the power sources available and two relay operated contacts that provide supervisory control of external loads.

Delivery Inspection
After opening the carton, carefully inspect the transfer switch components for any damage that may have occurred during shipment.
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 consignor's 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 transfer switch
• Installation and operator's manuals
• Current transformers (2)

To be supplied by installer:

• Connecting wire and conduit
• Various specialty tools/equipment

Mounting Guidelines
The system circuitry is enclosed in a NEMA Type 3R enclosure suitable for indoor/outdoor use. Guidelines for mounting the enclosure include:

• Install enclosure on a firm, sturdy supporting structure.
• The enclosure 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 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.

Typical automatic transfer switch installations are 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.

Power Wiring Interconnections

Shock Hazard. Installing low and high voltage wire in same conduit could result in death or serious injury. Do not run low and high voltage wire in the same conduit unless the insulation rating on ALL wiring is rated for 600V. See NEC for more information.

All wiring must be the proper size, properly supported and protected by conduit. All wiring should be done per applicable federal, state and local codes, standards and regulations. Obey wire type and torque specifications printed on the terminal blocks and neutral/ground connector. Approved for copper and aluminum conductors.
Complete the following connections between the transfer switch, main distribution panel, utility power and generator. Use installer-supplied 300VAC or greater wire that complies with Table 310.16 in the National Electric Code. Apply the necessary correction factors and wire size calculations.
NOTICE
Improper installation can cause damage to the circuit boards and shorten their life. Installing circuit boards in live circuits will damage the board and is not covered by warranty. ALWAYS disconnect ALL sources of power prior to servicing.

• Remove all power prior to installing this equipment. Failure to do so could cause internal damage to the board when making electrical connections.
• Turn generator toOFF position.
• Turn off utility power to the standby generator and transfer switch.

1. Set generator's circuit breaker to OFF (open) position.
2. Set generator's system switch to OFF position and remove 15 Amp fuse from system control panel.
3. Turn off utility power to the standby generator and transfer switch.
   
   Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.
4. Connect utility service to transfer switch's utility disconnect circuit breaker terminals marked "UTILITY CONNECTION".
5. Connect utility service neutral to transfer switch neutral terminal.
6. Connect main distribution panel feeder conductors to transfer switch terminals marked "LOAD CONNECTION".
7. Connect main distribution panel neutral conductor to transfer switch neutral terminal.
8. Connect main distribution panel ground conductor to transfer switch "GND" terminal.
   Assure grounding electrode conductor is connected and bonded per applicable federal, state and local codes, standards and regulations.
9. Connect feeder conductors from transfer switch breaker "GENERATOR CONNECTION" terminals to generator circuit breaker LINE1 and LINE2 terminals. Each conductor must pass through hole of current transformer before making connection.
10. Plug current transformer leads into "CT1" and "CT2" terminals on transfer switch control board.
11. Connect conductor from transfer switch neutral terminal to generator NEUTRAL terminal. Observe generator control panel labeling for terminal identification.
    
12. Connect conductor from transfer switch "GND" terminal to generator control panel "GROUND" terminal.
    Assure generator equipment grounding conductor is connected per applicable federal, state and local codes, standards and regulations.
13. Connect the transfer switch "UTILITY 240 VAC" terminals to generator's "240 VAC" terminals using installer supplied 300VAC or greater wire, minimum #14 AWG conductors via two-pole connector supplied with generator.
14. Connect "T/R" and "GND" terminals on transfer switch control board (B) to the generator's control panel (A) "TxRx" and "TxRx GND" terminals using #18 AWG twisted pair conductors, no greater than 200 ft in length, 300 volt 75°C-90°C via ten-pole connector or eight pin terminal.
    
15. Tighten all wire connections/fasteners to proper torque. See label inside transfer switch enclosure for proper torque values.

Supervisory Control Wiring
An air conditioner can be used with the supervisory contacts on either terminals A-A or B-B. Terminals A-A can only be used with supervisory control. Large loads can only be used with contactor control on terminals B-B. Examples of each system are described below.

1. The terminal strip on the transfer switch control board 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.
   For installer convenience, there are two wireways provided to help keep supervisory load wires organized.
2. Terminals "A-A" on transfer switch control board are rated for 24VAC. Connect these contacts in series between air conditioner thermostat and air conditioner contactor.
3. Terminals "B-B" on transfer switch control board are rated for 1 Amp 125 VAC. When connected with an installer supplied contactor, it can be used to control a large load, such as an electric hot water heater. Contacts are connected in series with the contactor control circuit.
4. Tighten all wire connections/fasteners to proper torque. See label inside transfer switch enclosure for proper torque values.

The illustration on the following page shows a typical completed installation. Your actual layout will vary. Illustration callouts are:

1. From utility watt-hour meter
2. Current transformers
3. Transfer switch
4. T/R and GND to Generator
5. Transfer switch control board
6. Neutral terminal
7. Neutral bus
8. Ground bus

10. Main distribution panel
11. UTILITY 240VAC to Generator
12. Two pin connector or Two pin terminal block
13. Ten pin connector or Eight pin terminal block
14. Generator circuit breaker

16. Generator

18. Generator Neutral terminal
19. Generator Ground terminal
20. Transfer switch ground terminal
21. Load connection to distribution panel
22. Generator disconnect circuit breaker
23. Utility disconnect circuit breaker
24. Utility connection
25. Generator connection

System Setup
You must perform the following before operating the system:

• If generator is installed in an area regularly subjected to temperatures below 40°F (4°C), select a 50 second warm up time by moving jumper JP2 (C) installed on transfer switch control board from '20' position to '50' position.
• Set the DPSW1 (A) and DPSW2 (B) dipswitches on the transfer switch control board to match the kW rating of the standby generator, as described in Setting Dipswitches.

Setting Dipswitches
Dipswitches are used to adjust control board operation based on generator capacity. DPSW1 and DPSW2 switches are set to correspond to total system kW rating. Dipswitch DPSW1 (A) has units of 1,000 watts; Dipswitch DPSW2 (B) has units of 10,000 watts.

NOTICE
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.

Set dipswitches with utility and generator power removed from the transfer switch to ensure proper control system operation. If dipswitches are set when power is present at transfer switch, a power reset needs to be performed before the new dipswitch settings will take effect. Power reset is when all power is removed from the transfer switch and then reintroduced after 30 seconds.
NOTICE An FC_8 will occur on standby generator control board if dipswitches are not properly established as noted above.
The "On" position for the dipswitches is the switch number ON THE TRANSFER SWITCH CONTROL BOARD, not on the switch. For example, for an 18,000 watt generator, set DPSW2 dipswitch 10 to "On" position. Set DPSW1 dipswitch 8 to "On" position. 10,000 plus 8000 equals 18,000 watts. Set only one switch to "On" position on DPSW1 and DPSW2.
Refer to following chart for proper switch selection(s).

kW Rating of Generator	DPSW #1 "ON" Position	DPSW #2 "ON" Position
7kW	7	0
8kW	8	0
9kW	9	0
10kW*	0	10
11kW*	1	10
12kW	2	10
13kW*	3	10
14kW	4	10
15kW	5	10
16kW	6	10
17kW	7	10
18kW	8	10
19kW	9	10
20kW	0	20
30kW	0	30
45kW	5	40
48kW	8	40
50kW	0	50
60kW	0	60
* For generators with a rating that includes 500 Watts, round down to next lowest rating (example: 13.5 kW set to 13kW)

NOTICE
Air density is less at high altitudes, resulting in less available engine power. Specifically, engine power will decrease 3.5% for each 1,000 feet (300 meters) above sea level and 1% for each 10°F (5.6°C) above 77°F (25°C). Generators located in these conditions must have the transfer switch programmed appropriately for this power decrease.

Testing the Automatic Transfer Switch

Shock Hazard. Equipment contains high voltage that could cause electrocution resulting in death or serious injury. Testing must only be performed by qualified personnel. Do not operate this equipment imprudently, carelessly or neglect its maintenance.

Turn the utility service disconnect circuit breaker feeding the transfer switch contactor to the OFF position. The system's automatic sequence described below will initiate. To return to utility power, turn the utility service disconnect circuit breaker to the ON position.

Utility Fail
The generator 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. Use jumper on transfer switch control board to select delay of 20 seconds or 50 seconds.

Transfer
Transfer from utility to generator supply occurs after voltage is above set levels. The transfer switch control board LED lights will change from green (utility) to red (generator) and the Symphony II status light will change blink status from Blink Blink_Pause_Blink Blink to Blink_Pause_Blink. Minimum engine run time is 5 minutes after transfer.

Load Management
Five minutes after transfer to generator power, the remote modules energize connected load(s) if generator power is available, starting with the highest priority (1) through the lowest priority (8). There is a 10 second delay between each sequential activation. The P1 through P8 LED's (A) on the Symphony II control board will illuminate to show loads being added.
Loads connected to remote modules set to priorities 9 and 10 remain off for the duration of a utility power outage.

Utility Pickup
Voltage pickup level is 80 percent of nominal voltage.

Retransfer
Retransfer from generator to utility power is approximately 10 seconds after utility voltage supply is above pickup level and minimum run time is completed. All remote module(s) will remain OFF for five minutes after the power transfer.

Engine Cool Down
Engine will run for 60 seconds after retransfer.

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. Information on handle use can be obtained by calling Technical Service at 800-743-4115.

Operation

To select automatic transfer operation, do the following:

1. In transfer switch, set utility disconnect circuit breaker to "ON" position.
2. In transfer switch, set generator disconnect circuit breaker to "ON" position.
3. Install 15 Amp fuse in generator's control panel.
4. Set generator's circuit breaker to "ON" position.
5. Set generator's system switch to "AUTO" position. The system will now be in automatic operation mode.

When the generator is providing power to the transfer switch, the transfer switch control board 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 the 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.

Enclosure Door
To open door, press the spring-load door lock to the right and pull down on the door.
To close and latch door, push door closed against enclosure. While in this position, push door upwards. This will cause spring-load door lock to engage and latch door in place.
Enclosure door MUST be closed and latched at all times except when system is being serviced.

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 3 feet (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 Testing the Automatic Transfer Switch unless a power outage occurs and home generator system has gone through an automatic sequence. Allow generator to run for at least 30 minutes.
Contact a licensed electrical professional to inspect and clean the inside of the enclosure and other components of your home generator system at least once a year.

When Calling for Assistance
You must have the Model Number and Serial Number from the unit ID label at hand if it is necessary to contact a local service center regarding service or repair of this unit. Obtain this information from the unit ID label located on or inside the enclosure.
To contact Briggs & Stratton call 800-743-4115, between 8:00 AM and 5:00 PM CT.

Installation Inspection
Before placing the system into service, inspect the entire

Transfer Switch Schematic Diagram

Product Specfications

Model 071045
Rated Maximum Load Current
a 25°C (77°F)* 100 Amps
Rated AC Voltage. 250 Volts
Poles 2
Frequency 60 Hz
Fault Current Rating 22,000 RMS Symmetrical Amperes on Utility Side
10,000 RMS Symmetrical Amperes on Generator Side
Normal Operating Range 28.8°C (-20°F) to 40°C (104°F)
Weight 28 kg (63 lbs)

Model 071046
Rated Maximum Load Current
a 25°C (77°F)* 200 Amps
Rated AC Voltage. 250 Volts
Poles 2
Frequency 60 Hz
Fault Current Rating 25,000 RMS Symmetrical Amperes on Utility Side
10,000 RMS Symmetrical Amperes on Generator Side Normal
Operating Range -28.8°C (-20°F) to 40°C (104°F)
Weight 28 kg (63 lbs)
This transfer switch is a UL Listed device.

Model 071044
Rated Maximum Load Current
a 25°C (77°F)* 200 Amps
Rated AC Voltage. 250 Volts
Poles 2
Frequency 60 Hz
Fault Current Rating 25,000 RMS Symmetrical Amperes on Utility Side
10,000 RMS Symmetrical Amperes on Generator Side Normal
Operating Range -28.8°C (-20°F) to 40°C (104°F)
Weight 28 kg (63 lbs)

Model 071069
Rated Maximum Load Current
a 25°C (77°F)* 150 Amps
Rated AC Voltage. 250 Volts
Poles 2
Frequency 60 Hz
Fault Current Rating 25,000 RMS Symmetrical Amperes on Utility Side
10,000 RMS Symmetrical Amperes on Generator Side Normal
Operating Range 28.8°C (-20°F) to 40°C (104°F)
Weight 28 kg (63 lbs)

Important Safety Instructions

SAVE THESE INSTRUCTIONS - This manual contains important instructions that should be followed during installation of the equipment.

Safety Symbols and Meanings

The safety alert symbol indicates a potential personal injury hazard. A signal word (DANGER, WARNING, or CAUTION) is used with the alert symbol to designate a degree or level of hazard seriousness. A safety symbol may be used to represent the type of hazard. The signal word NOTICE is used to address practices not related to personal injury.

indicates a hazard which, if not avoided, will result in death or serious injury.

indicates a hazard which, if not avoided, could result in death or serious injury.

indicates a hazard which, if not avoided, could result in minor or moderate injury.
NOTICE addresses practices not related to personal injury.
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 equipment unsafe.

Certain components in this product and related accessories contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands after handling.

NOTICE
Only qualified electricians should attempt installation of this equipment, which must strictly comply with applicable codes, standards and regulations.

Shock Hazard. Failure to properly wire equipment could cause electrocution resulting in death or serious injury.

• DO NOT connect the ground conductor to the neutral connection in the remote module.
• All modules must have a dedicated neutral connection.

Shock Hazard. Installing low and high voltage wire in same conduit could result in death or serious injury.

• Do not run low and high voltage wire in the same conduit unless the insulation rating on ALL wiring is rated for 600V. See NEC for more information.

Shock Hazard. Failure to properly ground equipment could cause electrocution resulting in death or serious injury.

• Do not touch bare wires.
• Do not use equipment 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 equipment.
• In case of an accident caused by electrical shock, immediately shut down all sources of electrical power and contact local authorities. Avoid direct contact with the victim.

Shock Hazard. Equipment contains high voltage that could cause electrocution resulting in death or serious injury.

• Do not operate this equipment imprudently, carelessly or neglect its maintenance.

NOTICE
Improper treatment of equipment could damage it and shorten its life.

• Use equipment only for intended uses.
• If you have questions about intended use, ask dealer or contact Briggs & Stratton Power Products.
• Do not expose equipment 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.