Voltmaster XAF105, Owner'S Manual, Page: 30 / 46

24 Voltmaster Engine-Driven Generators
Operation: Operating the generator
3.2.3 First-time use
Break-in period
Controlled break-in helps to ensure satisfactory service from the
generator.
Model XDR diesel generators
During the first 5 to 10 hours of operation, operate the generator
with electrical loads from 25 to 50 percent of the generator’s rated
capacity (indicated on the generator serial number tag). This will
ensure the valves are properly seated. After the first 10 hours of
operation, change the oil and oil filter.
Operating the diesel generator with insufficient load, referred to as
“wet stacking,” will damage the engine and void the warranty (see
“Model XDR diesel generators” on page 22).
All other models
During the first 2 to 3 hours of operation, do not apply heavy
electrical loads to the generator.
Change the oil after the first 3 hours of operation.
Fuel mixture for Model XAF generators
Before using an XAF alternative-fuel-powered generator for the first
time, adjust the fuel mixture for proper engine performance. Refer
to Figure 3.1 and follow these steps:
1. Start the engine.
2. Set a multimeter to measure hertz (Hz) and insert its probes into
one of the generator’s 120VAC receptacles.
3. Loosen the fuel mixture nut.
4. Rotate the fuel mixture adjustment screw:
■
Counterclockwise for richer mixture (lower altitudes)
■
Clockwise for leaner mixture (higher altitudes)
5. Adjust the fuel mixture screw until the multimeter reads 60 Hz,
which ensures optimal generator performance at full speed and
maximum load.
6. After adjusting the fuel mixture, tighten the fuel mixture nut to lock
the adjustment screw in place.