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3.4.2
TRANSFER BACK TO UTILITY POWER SOURCE
When utility power has been restored, transfer back to that source
and shut down the generator. This can be accomplished as fol-
lows:
1.
Set the generator's main circuit breaker to its OFF (or OPEN)
position.
2.
Let the engine run for a minute or two at no-load to stabilize
the internal temperatures.
3.
Set the generator's AUTO/OFF/MANUAL switch to
its OFF (or OPEN) position. The engine should shut down.
4.
Check that utility power supply to the transfer switch is turned
OFF.
Do not attempt to activate the transfer switch
manually until all power voltage supplies
to the switch have been positively turned off.
Failure to turn off all power voltage supplies
may result in extremely hazardous and pos-
sibly fatal electrical shock.
5.
Use the manual transfer handle inside the transfer switch to
move the main contacts back to their UTILITY position, i.e.,
loads connected to the utility power source (Figure 3.2).
6.
Turn ON the utility power supply to the transfer switch using
the means provided.
7.
Set the system to automatic operation as outlined in Automatic
Transfer Operation section.
3.5
SETTING THE EXERCISE TIMER
This generator is equipped with an exercise timer. Once it is set,
the generator will start and exercise once every seven days, on the
day of the week and at the time of day the following sequence is
completed. During this exercise period, the unit runs for approxi-
mately 12 minutes and then shuts down. Transfer of loads to the
generator output does not occur during the exercise cycle unless
utility power is lost.
A switch on the control panel (see Figure 3.1) permits selection of
the day and time for the system to exercise. At the chosen time,
perform the following sequence to select the desired day and time
of day the system will exercise. Remember seasonal time changes
affect the exercise time settings.
1.
Verify that the AUTO/OFF/MANUAL switch is set to AUTO.
2.
Press and hold the "Set Exercise Time" switch for several
seconds, then release. All the red LED's will flash for approxi-
mately 10 seconds and then stop.
3.
Once the red LED's stop flashing, the generator will start and
run for approximately 12 minutes and then shut down. The
exerciser is now set to run at this time of day each week.
Example: If the "Set Exercise Time" switch is pressed on
Saturday afternoon at 2:00 p.m., the generator will start and
exercise for approximately 12 minutes every Saturday at 2:00
p.m..
The exerciser will only work in the AUTO mode and will not work
unless this procedure is performed. The exerciser will need to
be reset every time the 12-volt battery is disconnected and then
reconnected, and when the 15A fuse is removed.
The 16kW unit has a low speed exercise option. Dip switch 1 on
the control board is factory set to OFF. This allows the engine to
run at a slower speed during weekly exercise periods for quieter
operation. If this Dip switch is set to ON, the generator will exercise
at it's normal speed.
This DIP switch position is only read at board power up. If the DIP
switch position is changed, power to the board must be cycled for
the micro controller to recognize the new DIP switch position.
Low speed exercise will be handled as follows:
1.
The standard start sequence will be initiated.
2.
The unit will run at 2,400 RPM.
3.
If utility is lost during exercise, the controller will do the follow-
ing:
• Wait 10 seconds for utility to return.
• If utility returns within 10 seconds, continue to exercise at
2,400 RPM.
• If utility is still lost after 10 seconds, run the engine up to
3600 RPM and transfer the load. At this time the controller
will exit the exercise routine and assume full automatic opera-
tion.
3.6
PROTECTION SYSTEMS
3.6.1
LOW OIL PRESSURE SWITCH
This switch (Figure 3.3) has normally closed contacts that are held
open by engine oil pressure during cranking and operating. Should
oil pressure drop below the 8 psi range, switch contacts close, and
the engine shuts down. The unit should not be restarted until oil is
added. The AUTO/OFF/MANUAL switch must then be turned to OFF
and then back to AUTO.
3.6.2
HIGH TEMPERATURE SWITCH
This switch's contacts (Figure 3.3) close if the temperature should
exceed approximately 144º C (293º F), initiating an engine shut-
down. The generator will automatically restart and the LED on
the generator control panel will reset once the temperature has
returned to a safe operating level.
Operation
NOTE:
17
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