Black Max BM907500 Operator's Manual page 13

GENERATOR CAPACITY
Make sure the generator can supply enough continuous
(running) and surge (starting) watts for the items you will power
at the same time. Follow these simple steps.
1. Select the items you will power at the same time.
2. Total the continuous (running) watts of these items. This
is the amount of power the generator must produce to
keep the items running. See the wattage reference chart
at right.
3. Estimate how many surge (starting) watts you will need.
Surge wattage is the short burst of power needed to start
electric motor-driven tools or appliances such as a circular
saw or refrigerator. Because not all motors start at the
same time, total surge watts can be estimated by adding
only the item(s) with the highest additional surge watts to
the total rated watts from step 2.
Example:
Tool or Appliance
Window AC,
10,000 BTU
Refrigerator
1/3 HP Well Pump
27 in. Television
Light (75 Watts)
3275 Total
Running Watts
Total Running Watts
Highest Starting Watts
Total Starting Watts Needed
POWER MANAGEMENT
To prolong the life of the generator and attached devices,
it is important to take care when adding electrical loads to
the generator. There should be nothing connected to the
generator outlets before starting its engine. The correct and
safe way to manage generator power is to sequentially add
loads as follows:
1. With nothing connected to the generator, start the engine
as described later in this manual.
2. Plug in and turn on the first load, preferably the largest
load you have.
ELECTRICAL
Running Starting
Watts* Watts*
1200 1800
700 2200
800 2000
500 0
75 0
2200 Highest
Starting Watts
3275
+ 2200
5475
3. Permit the generator output to stabilize (engine runs
smoothly and attached device operates properly).
4. Plug in and turn on the next load.
5. Again, permit the generator to stabilize.
6. Repeat steps 4 and 5 for each additional load.
Never add more loads than the generator capacity. Take
special care to consider surge loads in generator capacity
as previously described.
NOTICE:
Do not overload the generator's capacity. Exceeding the
generator's wattage/amperage capacity may damage the
generator and/or electrical devices connected to it.
Application/Equipment
Emergency / Home Standby
Clock Radio
Lights (qty. 4 x 75 W)
Refrigerator
Furnace Fan
Water Well Pump
Microwave
Sump Pump
Electric Range (per element)
Job Site
Electric Drill − 1/2 HP
Airless Sprayer − 1/3 HP
Quartz Halogen Work Light
Reciprocating Saw
Air Compressor − 1 HP
Circular Saw − 7-1/4 in.
Planer/Jointer − 6 in
Miter Saw − 10 in.
Table Saw/Radial Arm Saw − 10 in.
*Wattages listed are approximate. Check tool or appliance for actual wattage.
Page 9 — English
Estimated Estimated
Running Starting
Watts* Watts*
50 0
300 0
700 2200
800 2350
1000 2200
1000 0
1050 2200
2100 0
600 900
600 1200
1000 0
960 960
1600 4500
1400 2300
1800 1800
1800 1800
2000 2000