Generac Power Systems 00862-2 - Manual (Page 13)

Section 2 - Operation
Series QP55-G Recreational Vehicle Generator
OPERATION
( j C t
Figure 2.6 - Field Boost Circuit
CLOSEST TO
BEARING
GRND
1^
0 F-
£5 FIELD
♦ 2.1 Q.4
OVERVOLTAGE PROTECTION_______________
A solid-state voltage regulator (Figure 2.7) controls
the generator’s AC output voltage. This regulator
supplies an excitation current to the rotor. By reg­
ulating the rotor’s excitation current, the strength
of its magnetic field is regulated and, in turn, the
voltage delivered to connected electrical loads is
controlled. When the AC frequency is 60 Hertz, volt­
age is regulated at 120 volts (voltage-to-frequency
ratio is 2-to-l).
Figure 2.7 - Solid State Voltage Regulator
"Tj'ZhSENSlNG
-
4
(+)n TO ROTOR
(DIRECT CURRENT)
r‘ hFROM STATOR EXCITATION MINDING
(ALTERNATING CURRENT]
The voltage regulator also incorporates a “voltage
surge protection circuit.” This circuit prevents trou­
blesome surges in the generator AC output voltage.
Voltage surge is a common cause of damage to elec­
tronic equipment.
♦ 2.10.5
ENGINE
OVERSPEED_________________ _______
If engine speed is increased manually or otherwise,
the circuit controller board will disable the system
and shut down the engine.
DANCER
Do NOT attempt to physically adjust or control
the engine speed. Equipment damage or per­
sonal injury may result.
2.11 AODITIONAUNFORlVIATiON
• 2.11.1 25-HOUR BREAK-IN PERIOD_________________
The first 25 hours of operation is the break-in peri­
od for the generator. Properly breaking in the gen­
erator is essential to minimize fuel consumption
and provide maximum engine performance. During
this 25-hour break-in period, follow this procedure:
• Run the unit at varying electrical loads to help
seat the engine piston rings properly.
• Check the engine oil level frequently. Add oil if
needed. It is normal for the generator engine to
consume more oil than is normal until the piston
rings have properly seated.
• For the 75-hour operation following the break-in
period, avoid light electrical loads. Load the
generator at 50 percent (or more) of its rated
wattage
capacity. Repeated light loads during
these 75 hours can cause improper seating of
engine piston rings, resulting in blowby and high
oil consumption.
• After operating the unit for 25 hours, complete
the tasks recommended under Section 2.11.2.
• 2.11.2 25-HOUR CHECK-UP_______________________
After the 25-hour break-in period, contact a
Generac Authorized Service Dealer for the following
maintenance. The vehicle owner is responsible for
any charges:
• Change the engine crankcase oil and oil filter.
• Check the oil level.
• Inspect the cooling and ventilation openings.
• Check the engine carburetor adjustments.
• Check the engine ignition system.
• Inspect the entire electrical system.
• Inspect the engine exhaust system.
• 2.11.3 ATTENTION REQUIRED AFTER
___________ SUBMERSION__________________________
If the recreational vehicle generator has been sub­
merged in water, it MUST NOT be started and oper­
ated. Following any submersion in water, have a
Generac
Authorized Service Dealer thoroughly
clean and dry the generator.
• 2.11.4 OPERATION IN HIGH GRASS OR
___________ BRUSH________________________________
Never operate the generator while the vehicle is
parked over high grass, weeds, brush, leaves or any
other
combustible substance. Such materials can
ignite and bum from the heat of the exhaust sys­
tem.
The generator exhaust system becomes
extremely hot during operation and remains hot for
a long time after it has shut down.
Generac® Power Systems, Inc. 1 1