Section 1.4 - Operating Instructions; Control Panel; User Interface; Automatic Operation - Generac Power Systems CorePower Repair Manual

Home standby generator
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Section 1.4
Operating Instructions

CONTROL PANEL

WARNING! With the switch set to AUTO, the engine
may crank and start at any time without warning. Such
automatic starting occurs when Utility power source
voltage drops below a preset level or during the normal
exercise cycle. To prevent possible injury that might be
caused by such sudden starts, always set the switch to
the OFF position and remove the fuse before working on
or around the Generator or transfer switch. Then, place
a "DO NOT OPERATE" tag on the Generator panel and
on the transfer switch.
AUTO-OFF-MANUAL
AUTO – Selecting this switch activates fully automatic system
operation. It also allows the unit to automatically start and
exercise the engine every seven days at the time chosen by
the user.
OFF – This switch position shuts down the engine. This
position also prevents automatic operation.
MANUAL – Setting the switch to the MANUAL position will
crank and start the engine. Transfer to standby power will not
occur unless there is a failure of Utility.
7.5 Amp Fuse
This fuse protects the controller as wells as the DC components
against overload. If the fuse element has melted open due to an
overload, engine cranking and or running will not be possible.
Should a fuse replacement become necessary, use only an
identical 7.5 amp replacement fuse.

USER INTERFACE

The generator is equipped with an internal exercise timer. Once
set, the Generator will start and exercise every seven days, on
the day of the week and the time of day specified. During this
exercise period, the unit runs for approximately 12 minutes and
then shuts down. Transfer of loads to the Generator output
does not occur during the exercise cycle unless Utility is lost.
Refer to "Setting the exercise time" in Section 1.4.
Note: The exercise will only work with the AUTO-OFF-
MANUAL switch in the AUTO position.

AUTOMATIC OPERATION

CAUTION! The Generators Voltage and Frequency must
be verified with the Generator Main Line Circuit Breaker
(MLCB) OFF or OPEN Prior to selecting Automatic or

Manual operation!

Page 16
PART 1
To select automatic operation
The following procedure applies only to those installations
which utilize an air-cooled generator in conjunction with a
transfer switch. Residential transfer switches do not have
intelligent circuits of their own. Printed circuit board logic in
the controller controls the automatic operation of the transfer
switch and the generator.
To select automatic operation when a transfer switch is installed
along with a home standby generator, the procedure is as
follows.
1.
Ensure that the transfer mechanism in the transfer switch
is in the "Utility" position. If needed, turn OFF or OPEN
the Utility source Main Line Circuit Breaker and manually
transfer the breaker to the "Utility" position.
2.
CLOSE or turn ON the Utility source Main Line Circuit
Breaker and ensure Utility voltage is available to the
UTILITY terminals N1 and N2.
3.
Actuate the Generator main line circuit breaker (MLCB) to
its "Closed" position.
4.
Set the Generators AUTO-OFF-MANUAL switch to the
AUTO position.
Following the procedure of Steps 1 through 4, a dropout of
Utility voltage below a preset level will result in automatic
Generator cranking and start-up. Following startup, the transfer
switch will actuate to the "Standby" position.
MANUAL OPERATION
Transfer to "Standby" and Manual Startup
To transfer electrical loads to the Generator and to start the
generator manually, the procedure is as follows:
1.
On the generator, set the AUTO-OFF-MANUAL switch to
the OFF position.
2.
On the generator, set the main line circuit breaker (MLCB)
to the "Open" position.
3.
Locate a means of Utility disconnect and set it to the OFF
position.
4.
Manually actuate the breaker to the "Standby" position in
the transfer switch.
5.
On the generator, set the AUTO-OFF-MANUAL switch to
the MANUAL position.
WARNING! Engine will crank and start!
6.
Let the engine warm up and stabilize for a minute or two
at no-load. Set the generators MLCB to the "Closed"
position. Generator voltage should now be available to
the transferred electrical loads.
GENERAL INFORMATION

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Corepower 6/7 kw

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