Unpacking; Lifting The Generator; Specifications - Generac Power Systems 004742-0 Owner's Manual

Figure 1.6 - Low Coolant Level Sensor
1.7.4 OVERSPEED SHUTDOWN
The pre-pack circuit board on liquid cooled units
receives AC frequency (rpm) signals directly from the
stator AC power windings, via sensing leads S15 and
S16. Should AC frequency exceed about 72 Hz, cir-
cuit board action will automatically shutdown the
engine (Figure 1.7).
*Rated power of generator is subject to and limit-
ed by such factors as ambient temperature, alti-
tude, engine condition, and other factors. Engine
power will decrease about 3.5% for each 1000 feet
above sea level and will decrease an additional 1%
for each 10°F above 60°F . Maximum output power
of the generator is limited by maximum engine
power.
Figure 1.7 - Printed Circuit Board Assembly
J2
A E
M14 M15
M8
M1 M1 M1 M1 M1 M1 M1 M1 M Q7
C1
R1
U1
M10
SW1
BR1
U12
R56 CR1
R12
C4
U6
R11 R10 CR7
CR37 K4
Q4
K2
Q5
Q3
K3
K1
M9
Q13
M2
R55
CR41
2002 GENERAC POWER SYSTEMS, ASSY #076009A
1.7.5 PCB OPERATION LED'S
• LED 1 is RED. This LED will be on when utility
sensing is NOT available to the circuit board. This
LED will function only when the Auto/Off/Manual
switch is set in the Auto position.
• LED 2 is YELLOW. This LED will be on when the
circuit board battery charger is on. This LED will
cycle on and off with the battery charger, 4.85
hours on then 4.85 hours off.
• LED 3 is GREEN. This LED will flash when the cir-
cuit board has load voltage available to it. This
LED will function when voltage is available across
T1 and T2.
6
Section 1 — General Information
Liquid-cooled 15 kW, 20 kW and 25 kW Generators
PRE-PACKAGED STANDBY
U13 U14
U17
U15
C17
C18
C12
R68 R60
C21
C25
C22
U16
C24
C3
Q9
C2
C5
U2
Q1
C
U18
U3
U7
U9
U10
Q12
C23
Q2
C20
C8
Q11
C15
Q15
C10
C9 C 1 C11
LED2
U20
C14 C16 C7
Q6
C13
CUT R83
FOR 50HZ
1.7.6
After 90 seconds of crank-rest cycles, this function
ends cranking if the engine fails to start in that
90-second span.
1.7.7
This clearly labeled fuse is located on the front panel
of the control system. It protects the panel wiring and
components from damaging overload. Always
remove this fuse before commencing work on the
generator. The unit will not start or crank if the fuse
is blown. Replace the fuse with one of the same size,
type, and rating. The manufacturer normally uses an
AGC fuse rated at 30 amps.
1.8
1.8.1 UNPACKING PRECAUTIONS
Handle shipping cartons and crates with care. Use
care to avoid damage from dropping, bumping, colli-
sion, etc. Store and unpack cartons with the proper
side up, as noted on the shipping carton.
1.8.2 INSPECTION
After unpacking, carefully inspect the generator for
any damage that may have occurred during ship-
ment. If loss or damage is noted at the time of deliv-
ery, have the person(s) making delivery note all dam-
age on the freight bill or affix his signature under the
consignor's memo of loss or damage.
M3
Q14
1.9
U5 U4 LED3
U19
When lifting or hoisting equipment is used, be
!
careful not to touch overhead power lines. The
C19
U8
generators weight of more than 900 pounds
requires proper tools, equipment, and qualified
Q16
personnel to be used in all phases of handling
LED1
and unpacking.
M4

1.10 SPECIFICATIONS

1.10.1 GENERATOR SPECIFICATIONS
Model
Rated Max. Cont.
AC Power Output (kW)
Rated voltage (volts)
No. of Rotor Poles
Driven Speed of Rotor
Rotor Excitation System
Type of Stator
Rotor/Stator Insulation
OVERCRANK SHUTDOWN
DC FUSE

UNPACKING

LIFTING THE GENERATOR

4746-0
25
3600
Direct excited brush type
1-Phase
4744-0 4742-0
20 15
120/240
2 4
3600 1800
4 Wire
Class F