Rheem GEN12AD-V Installation Manual Download Page 30

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Operation

Automatic Operation Sequence

The generator’s control panel houses a logic control circuit
board. This control board constantly monitors utility power
source voltage. Should that voltage drop below a preset
level, control board action will signal the engine to crank
and start.

When utility source voltage is restored above a preset
voltage level, the engine is signaled to shut down.

The actual system operation is not adjustable and is
sequenced by sensors and timers on the control board,
as follows:

Utility Voltage Dropout Sensor

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of the nominal supply voltage, the sensor energizes
a 10 second timer. The timer is used to ‘sense’
brown-outs.

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and start.

Utility Voltage Pickup Sensor

This sensor monitors utility power supply voltage. When that
voltage is restored above 80 percent of the nominal source
voltage, a time delay starts timing and the engine will go to
engine cool-down.

Engine Cool-down Timer

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source, the engine cool-down timer starts timing.

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generator will stop.

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Setting Exercise Timer

The generator is equipped with an exercise timer that
will start and exercise the system once every seven days.
During this exercise period, the unit runs for approximately
20 minutes and then shuts down. Electrical load transfer
DOES NOT occur during the exercise cycle (unless an utility
power outage occurs).

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(see

System Control Panel

). The specific day and the

specific time of day this button is pressed is programmed
into the control board memory. This date and time is then
used to automatically initiate the system exercise cycle. The

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the set exercise cycle is set.

To perform the Set Exercise procedure:

1. Choose the day and time you want your generator

to exercise.

2. On that day and time, press and hold the

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to confirm that the exercise timer has been set. Then
release the button.

The unit will crank and run the exercise cycle. During

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Once the exercise cycle is complete, the unit will turn

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The exercise cycle may be discontinued at anytime by
turning the System Switch to OFF.

3. The unit will then start and run its 20 minute

exercise cycle.

For example, if you press SET EXERCISE on Sunday morning
at 10:00 AM, the unit is set to run an exercise cycle every
Sunday at 10:00 AM (+/- 1/2 hour).

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AUTO

mode

and this exact procedure is followed. The exerciser will need
to be re-set if the 15 Amp fuse is removed or changed, or if
the starting battery is disconnected.

If you want to change the day and time the unit exercises,

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weekday and time you want it to take place.

Generator will not exercise if timer is not set.

Installation Inspection

Before placing the generator system into service, inspect the
entire installation carefully.

This completes the installation and start-up instructions.
The operator’s manual provides full details on Operation,
Maintenance and Troubleshooting for this generator system.

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