Manual Transfer And Startup; Retransfer And Shutdown; Automatic Operation - Generac Power Systems 004742-0 Owner's Manual

3.2.1 HOURMETER
Indicates time the engine-generator has operated, in
hours and tenths of hours. Use the hourmeter along
with the periodic maintenance schedule for the gen-
erator set.
3.2.2 AUTO/OFF/MANUAL SWITCH
Use this 3-position switch as follows:
• Set the switch to "Auto" for fully automatic opera-
tion. See "Automatic Operation".
• Set switch to "Manual" position to crank and start
the generator engine.
• Set switch to "Off" position to shut down an oper-
ating engine. With "Off" selected, operation will not
be possible.
DANGER
With switch set to "auto", engine can crank and
!
start suddenly without warning. Such automat-
ic start up normally occurs when utility source
voltage drops below a pre-set level. To prevent
possible injury that might be caused by such
sudden starts, set AUTO/OFF/MANUAL switch
to "off" before working on or around the unit.
Then, place a "do not operate" tag on control
console.
3.2.3 FAULT INDICATOR LAMP
Lamp goes ON when one or more of the following
engine faults occurs and when engine shuts down.
• Low oil pressure
• High coolant temperature
• Low coolant level
3.2.4 15 AMP FUSE
Fuse protects the control console's DC control circuit
against electrical overload. If the fuse has melted
open because of an overload, engine cranking and
startup cannot occur. If the fuse needs to be replaced,
use only an identical 15-amp replacement fuse. (Type
AGC)
3.2.5 7.5 AMP INLINE FUSE
This inline fuse is connected in the 15A line that runs
between the Auto/Off/Manual switch and position 10
of the 76009A PCB. This fuse protects the start, fuel,
field boost, and transfer outputs from the PCB and
will open if there is excessive current draw on any
one of these outputs.
Liquid-cooled 15 kW, 20 kW and 25 kW Generators
• Overcrank
• Overspeed
Section 3 - Operation
This fuse will not remove the + battery input
power from the PCB when it opens. This means
the exercise timer will not be reset. If this fuse
does open, carefully check the wiring to the start,
fuel, field boost and transfer outputs before
replacing the fuse.
3.2.6 SET EXERCISE TIME SWITCH
This switch permits programming the generator to
start and exercise automatically. "See Weekly
Exercise Cycle."
3.3 MANUAL TRANSFER AND
START-UP
To transfer electrical loads to the STANDBY (GEN-
ERATOR) power source side and start the engine
manually, refer to the Owner's Manual of the particu-
lar transfer switch.
3.4

RETRANSFER AND SHUTDOWN

When utility power source voltage has been restored,
electrical loads may be transferred back to that
source and the generator can be shut down as fol-
lows:
• Verify that utility power supply voltage to the trans-
fer switch has been positively turned "Off," using
whatever means provided (such as utility main line
circuit breaker).
• Set the generator's main circuit breaker to its "Off"
or "Open" position.
• Let the generator engine run at no-load for a few
minutes, to stabilize internal unit temperatures.
• On the generator console, set the Auto-Off-Manual
switch to "Off". Wait for engine to come to a com-
plete stop.
• For transfer to utility position, refer to the Owner's
Manual of the particular transfer switch.
• Turn on the utility power supply to the transfer
switch, using whatever means provided (such as a
utility main line circuit breaker). The utility power
source now powers the loads.
3.5

AUTOMATIC OPERATION

To set the system for fully automatic operation, pro-
ceed as follows:
• Check that load circuits are connected to the
utility power supply.
• Set the Auto/Off/Manual switch to its "Auto" posi-
tion.
• Set the generator main circuit breaker to its "On"
or "Closed" position.
NOTE:
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