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Compatible Generators | Output Running Wattage | ST Switch Output Power | Max Utility Input Power | Generator Input Power | ST Switch Outlets | Generator Power Cord |
Must have Smart Switch Port | 2,400W | 120V 20A 60Hz | 120V 20A 60Hz | 120V 20A 60Hz | 120V 5-20R 20A Duplex | L14-30P MAX 120V 20A |
IMPORTANT: KEEP YOUR PURCHASE RECEIPT TO ENSURE TROUBLE-FREE WARRANTY COVERAGE.
To ensure trouble-free warranty coverage, it is important you register your Westinghouse ST Switch.
You can register your ST Switch by either:
The ST Switch will only work with generators that have this Smart Switch Ready outlet. This product will not work with any other generators. Please see Smart Switch outlet below.
120 Volt AC devices have two different electric power demands that must be taken into consideration, namely the running power and the starting/peak power. Both are measured in Watts (typically abbreviated as "W").
The steady state continuous load is the running power demand and this is often marked on the device near its model number or serial number. Sometimes the device might only be marked with its voltage (i.e. 120V) and current draw (e.g. 6 Amp or 6A), in which case the running power demand in Watts can be obtained by multiplying the voltage times the current, e.g. 120V × 6A = 720W.
Simple resistive 120 Volt AC devices such as incandescent bulbs, toasters, heaters, etc. have no extra power demand when starting, and so their starting power demands are the same as their running power demands.
More complex 120 Volt AC devices containing inductive or capacitive elements such as electric motors have a momentary extra power demand when starting, which can be up to seven times the running power demand or more. Manufacturers of such devices rarely publish this starting power demand and so it's often necessary to estimate it. A rule of thumb for devices fitted with an electric motor is to apply a starting power multiplier of 1.2 for small hand-held or portable devices and a value of 3.5 for larger stationary devices. For example, a 900W angle grinder can be assumed to have a starting power demand of at least 1.2 × 900W, which equals 1,080W.
To prevent overloading of the ST Switches 120 Volt AC system add up the running power demand of all the 120 Volt AC devices that will be connected to the ST Switch at one time. This total must not be greater than the power output of the utility power.
NOTICE
The list of appliances below is a general guideline. Always check the wattage of the devices you are trying to power as ratings may vary. Always test to confirm ST Switch is not overloaded by appliance power demands.
When adding up power demands of appliances do not exceed the rated output of your utility power.
The table below are common appliances that can be individually powered by the ST Switch. Wattages are estimations.
TABLE 1: RECOMMEND APPLIANCES | |
Appliance | Typical Running Wattage |
Refrigerator or Freezer | 700W |
Sump Pump (1/3 HP) | 1300W |
Sump Pump (1/2 HP) | 2200W |
Space Heater | 1500W |
Gas or Fuel Furnace (1/8 HP) | 300W |
Gas or Fuel Furnace (1/6 HP) | 500W |
Gas or Fuel Furnace (1/4 HP) | 600W |
Gas or Fuel Furnace (1/2 HP) | 700W |
10,000 BTU Air Conditioner | 700W |
15,000 BTU Air Conditioner | 1500W |
READ ALL SAFETY INFO IN THIS ST SWITCH MANUAL AND GENERATOR MANUAL. GENERATOR MUST BE OFF WHILE SETTING UP ST SWITCH
BEFORE USING ST SWITCH PLEASE REVIEW ALL SAFETY INFORMATION AND CONFIRM ST SWITCH AND GENERATOR ARE WORKING CORRECTLY
WHEN UTILITY POWER IS ON:
When home utility power is on it will provide power to the appliances plugged into the 5-20R duplex on the ST Switch box up to 120V at 20A. The green utility power indicator light will illuminate on the ST Switch box when utility power is on. The generator will remain off with the engine control switch in the RUN position and the utility power will charge the battery through the generator control cable. See image below for flow of electricity when utility power is on.
WHEN UTILITY POWER IS LOST:
As soon at utility power is lost the utility loss indicator light will illuminate red. 5-10 seconds after utility loss the ST Switch will turn the generator on. Once the generator has successfully started the ST Switch will transfer input power from utility to generator power. The generator power indicator will illuminate green when appliances that are plugged into the ST Switch are being powered by the generator. The utility loss indicator will remain red as long as utility power is off. See image below for flow of electricity when utility power is off and generator power is on.
WHEN UTILITY POWER COMES BACK ON:
After an outage when utility power returns the ST Switch will run a quick diagnostic to confirm there are no spikes or flickering in the utility power before transferring input power back to utility. Once utility is returned the red utility loss indicator light will turn off and the utility and generator power indicator lights will remain on. After power has been transfered back to utility power, the ST Switch will allow the generator 45-50 seconds to cool down before shutting it off. Once the generator has shut down the green generator power indicator light will turn off.
NOTE: If utility power is lost during the generator cool down phase the ST Switch will wait a couple of seconds and transfer input power back to generator power until utility power is restored.
Lights Displayed | Description |
![]() | Input power for appliances plugged into the ST Switch is being provided by utility power. |
![]() | Utility power has been lost and there is no power being provided to appliances plugged into the ST Switch. In 5-10 seconds of this light being on the ST Switch will turn the generator on. |
![]() | Utility power is off and power to appliances plugged into the ST Switch is being provided by generator. |
![]() | Utility power has come back on but ST Switch is running diagnostic to make sure power is steady before transferring. This diagnostic usually takes 5-10 seconds and then the red utility loss light should turn off. |
![]() | Generator is in cool down stages before shutting off. This takes 45- 50 seconds after the red utility loss indicator turns off. |
BEFORE TESTING ST SWITCH PLEASE REVIEW ALL SAFETY INFORMATION AND CONFIRM CORRECT SET UP PROCEDURE
WARNING
The ST Switch MUST BE TESTED before use to confirm proper set up and operation. Never leave the ST Switch unattended if you have not first tested to confirm it works correctly. Never exceed the total power output of the utility power. GENERATOR MUST BE OFF WHEN SETTING UP ST SWITCH.
WARNING
Using damaged or frayed extension cords could result in death or serious injury
It is recommended to use no longer than a 30ft extension cord for utility power. The cord must have a ground and cannot be damaged or frayed.
NEED LONGER GENERATOR CORDS?
WARNING
Never move generator closer to home to compensate for cords/cables being too short. Only use Westinghouse power cable extenders for proper operation. Never use longer than 50ft total of generator control or power cables as it may affect performance.
Westinghouse offers extension cords for generator power input cord and generator control cable. Part numbers are below:
Part Number | Description |
3021225C | 25' Generator Power Input Cord: 30A 120V L14-30P to L14-30R |
STCORD25 | 25' Generator Control Cable: 7 Pin ST Outlet Connector |
WARNING
Always store in a dry location away from any flammable liquids or materials. Do not store in temperatures lower than 50°F and higher than 95°F
Be sure to test the ST Switch every 6 months to make sure the unit is in good working order.
WARNING
This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
DANGER
This manual contains important instructions for operating this product. For your safety and the safety of others, be sure to read this manual thoroughly before operating the ST Switch. Failure to properly follow all instructions and precautions can cause you and others to be seriously hurt or killed.
The words DANGER, WARNING, CAUTION and NOTICE are used throughout this manual to highlight important information. Be certain that the meanings of these alerts are known to all who work on or near the equipment.
This safety alert symbol appears with most safety statements. It means attention, become alert, your safety is involved! Please read and abide by the message that follows the safety alerts symbol.
DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE
Indicates a situation which can cause damage to the ST Switch, personal property and/or the environment, or cause the equipment to operate improperly.
NOTE:
Indicates a procedure, practice or condition that should be followed in order for the ST Switch to function in the manner intended.
DANGER
Never use the generator in a location that is wet or damp. Never expose the generator to rain, snow, water spray or standing water while in use. Protect the generator from all hazardous weather conditions. Moisture or ice can cause a short circuit or other malfunction in the electrical circuit.
Make sure generator is in an open, secure location and at least 15ft away from the house. Never operate the generator in an enclosed area. Engine exhaust contains carbon monoxide. Only operate the generator outside and away from windows, doors and vents.
WARNING
Voltage produced by the generator could result in death or serious injury.
WARNING
Gasoline and gasoline vapors are extremely flammable and explosive under certain conditions.
WARNING
Never operate the generator if powered items overheat, electrical output drops, there is sparking, flames or smoke coming from the generator, or if the receptacles are damaged.
Never use the generator to power medical support equipment.
Always remove any tools or other service equipment used during maintenance from the generator before operating.
NOTICE
Never modify the generator.
Never operate the generator if it vibrates at high levels, if engine speed changes greatly or if the engine misfires often.
Always disconnect tools or appliances from the generator before starting.
DANGER
Read and understand the ST Switch and generator owner's manual before using.
Electrical Shock Hazard:
Never put the ST Switch box in a location that is wet or damp. Never expose the ST Switch to rain, snow, water spray or standing water while in use. Protect the ST Switch from all hazardous weather conditions. Moisture or ice can cause a short circuit or other malfunction in the electrical circuit.
To ensure proper operation of this unit, test the generator and ST Switch as described in the owner's manual before leaving equipment unattended.
WARNING
Improper set up of the ST Switch could lead to death or serious injury.
NOTICE
Always add up the wattage of the appliances you are going to power and do not exceed the power output of the ST Switch.
The power output of the ST Switch must match your utility power output. Plug devices directly into utility power to test and confirm that the outlet can provide enough power.
HAVE QUESTIONS? Email us at service@wpowereq.com or call 1-855-944-3571
WestinghouseOutdoorPower.com
Service Hotline: (855) 944-3571
777 Manor Park Drive Columbus, OH 43228
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
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