PETROL GENERATOR GT SERIES OPERATOR’S
MANUAL
TRADE SERIES
OPERATION
NEVER exceed the rated wattage capacity of your generator. OVERLOADING may cause SERIOUS
DAMAGE to the generator and attached electrical devices and may result in fire.
WARNING
!
!
Your generator MUST BE SIZED PROPERLY to provide both the running and starting (surge) wattage
of the devices you will be powering. Before using your generator, determine the running and starting
wattage requirements of all the electrical devices you will be powering simultaneously. Following below 4
simple steps and example on the right:
Step 1. Determine the tools and appliances you want to power at the
same time
Step 2. List the start up and running power usage (Watts) for each
product
Step 3. Add the total power usage and add 10% as a safety net
Step 4. Choose a generator with a rated and maximum power that equals or exceeds your totals. In
this case a generator with a rated power of at least 3108W and a maximum power output greater than
7233W would be required.
STARTING POWER CONSUMPTION
Electronic appliances and brushed motors generally will not draw more than running Watts at start up.
Induction motors in equipment like air conditioners, welders, water pumps and compressors can draw
2 to 5 times their running power to start. Please consult your equipment’s rating label, manual or the
manufacturer to confirm specific requirement. If only the running wattage is given on the nameplate for
a device with an electric motor, the starting wattage can be approximated to be three to five times the
running wattage. Estimates for the running wattage requirements for common devices are listed in the
table below. Guidance for starting wattages is provided in the table’s footnotes. To size your generator
correctly you need to use Watts - here are some useful calculations:
Watts = Volts x Amps Example 240 Volts x 5 Amps = 1200 Watts
(a) Hard-starting motors require 3-5 times the rated running watts (b) For extremely hard to start loads such as air conditioners and
air compressors, consult the equipment dealer to determine max wattage.
DEVICE
RUNNING
WATTS
DEVICE
RUNNING
WATTS
DEVICE
RUNNING
WATTS
Air conditioner (12.000
BTU)
1700 (a,b)
Freezer
800 (b)
Oven
4500
Battery charger (20 Amp)
500
Hair dryer
1200
Paint sprayer, Airless (1/3
HP)
600 (a)
Belt sander (3”)
1000
Hand drill (1”)
1100
Paint sprayer, Airless
(handheld)
150
Chain saw
1200
Hand drill (3/8”)
500
Radio
200
Circular saw(6½”)
2000 (a,b)
Hedge trimmer
450
Refrigerator
600 (b)
Coffee maker
1800 (a,b)
Home computer
150
Slow cooker
200
Compressor (1 HP)
1400 (a,b)
Kettle
2400
Submersible pump (1-1/2 HP)
2800 (a)
Compressor (3/4 HP)
1800 (a)
Jet pump
800 (a)
Submersible pump (1 HP)
2000 (a)
Compressor (1/2 HP)
1400 (a)
Lawn mower
1200
Submersible pump (1/2 HP)
1500 (a)
Curling iron
700
Light bulb (100 Watt)
100
Sump pump
600 (a)
Dishwasher
1200
Microwave oven
700
Television
500
Edge trimmer
500
Milk cooler
1100 (a)
Toaster
1000
Electric nail gun
1200
Oil burner on furnace
300
Vacuum cleaner
250
Electric range (1 element)
1500
Oil-red space heater (140,000 Btu)
400
Water heater
3000
Electric skillet
1250
Oil-red space heater (85,000 Btu)
225
Furnace fan (1/3 HP)
1200 (a)
Oil-red space heater (30,000 Btu)
150
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