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Power Systems, Inc. 15
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 possibly
fatal electrical shock.
4. Use the manual transfer handle inside the trans-
fer switch to move the main contacts to their
“Standby” position, i.e., loads connected to the
standby power source (Figure 3.2).
Figure 3.2 – Manual Transfer Switch Operation
5. Turn ON the utility power supply to the transfer
switch using the means provided (such as a utili-
ty main line circuit breaker).
6. To crank and start the engine, set the
Auto/Off/Manual switch to MANUAL.
7. Let the engine stabilize and warm up for a few
minutes.
8. Set the generator’s main circuit breaker to its ON
(or closed) position. The standby power source
now powers the loads.
3.5.2 TRANSFER BACK TO UTILITY POWER
SOURCE
When utility power has been restored, you will want
to transfer back to that source and shut down the
generator. This can be accomplished as follows:
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 possibly
fatal electrical shock.
5. Use the manual transfer handle inside the trans-
fer switch to move the main contacts back to their
“Utility” position, i.e., loads connected to the util-
ity power source (Figure 3.2 on page 13).
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 3.3
(Page 12).
3.6 SETTING THE EXERCISE TIMER
Your 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 you complete the following sequence.
During this exercise period, the unit runs for approx-
imately 12 minutes and then shuts down. Transfer of
loads to the generator output does not occur during
the exercise cycle.
A switch on the control panel (see Figure 3.1, Page
12) allows you to select the day and time for system
exercise. To select the desired day and time of day,
you must perform the following sequence at that
time.
1. Verify that the Auto/Off/Manual switch is set
to AUTO.
2. Hold down the set timer switch until the genera-
tor starts (approximately 10 seconds) and
then release.
3. The generator will start and run for approximately
12 minutes and then shut down on its own. The
exerciser will then be set to run at that time of day
every week.
NOTE:
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. The exerciser WILL NOT work
if dip switch 2 (Remote Not Auto) is ON.
DANGER
DANGER
Section 3 — Operation
Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators