Section 2: General Information; Synergy Operating Principle; Benefits; Start Up - Generac 0060550 El Manual Del Propietario

Section 2: General Information

Synergy Operating Principle

Benefits

The Synergy 20 kW generator brings exciting new
technology to the Home Standby Generator. The
generator is significantly more fuel-efficient than constant
speed generators at normal loads, provides premium
power quality, and is significantly quieter while operating
at exercise and normal loads.
• Exceptionally quiet exercise at 57 dB
• Quieter operation; 3 dB sound reduction with
improved tonal qualities at exercise and under
normal loads
• Cleanest Standby power available with 1.5 THD
• Significant fuel savings: more fuel efficient under
normal loads
•
Lower operating speed at 2700 rpm at low loads
• Tuned Helmhortz resonator and muffler to further
reduce sound levels
• Variable Speed / Constant Frequency operation

Start Up

When the generator starts, the engine speed increases to
3600 RPM to produce maximum power. This optimizes
power to carry the load when the transfer switch
operates. The engine RPM then gradually decreases to a
speed appropriate for the attached load.
For example: If there is no load, the engine speed
decreases to approximately 2700 RPM. The time it takes
to decrease to 2700 RPM is approximately 4–5 minutes.
Since the rate of decrease is linear, less time would be
required for it to decrease to only 3400 RPM.
During startup, as the engine speed increases to 3600
RPM, the Automatic Voltage Regulator (AVR) electronics
perform a self test (before transfer) involving an overall
system check of the unit. If a fault is detected, the unit
shuts down and displays an alarm.

Normal Running

The engine operates between 2700 RPM–3600 RPM
depending on the attached load. When the load
increases or decreases, the speed increases or
decreases accordingly.

Small Load Changes

The system is designed to maintain the current engine
speed for small load changes. Larger load changes result
in a change in engine speed to appropriately handle the
load.
Owner's Manual for 60 Hz Synergy Generator™

Large Load (Not Overload)

The engine always runs at a speed appropriate for the
attached load. When a large load is applied, the fast
loadshed signal is activated. All loads attached to the
loadshed controller in the transfer switch are dropped
and the engine speed immediately increases to 3600
RPM. Five seconds later, the loadshed signal is
deactivated and Loads 3 and 4 are sequenced back on,
spaced 15 seconds apart. Loads 1 and 2, which are
designed for air conditioners, are sequenced back on
after five minutes.
The engine speed remains at 3600 RPM for a
programmable time (20 minutes default) and then slows
to the speed appropriate for the attached load. The
programmable time can be changed by the dealer to
prevent annoying increases and decreases in engine
speed if large loads turn on and off frequently.

Overload

If a load is sensed that is too large for the engine, that
load will be locked out for a period of 30 minutes. If the
load is not connected through a fast loadshed-enabled
controller and module, the generator will shut down with
an "Overload" alarm.

Low Speed Exercise

Low speed exercise operates at 1950 RPM for five
minutes. The output voltage and frequency will not be at
the rated voltage and frequency during exercise.

Normal Exercise

Normal exercise is at 3600 RPM at normal voltage and
frequency levels for 5 minutes.

Automatic Voltage Regulator (AVR) Cooling Fans

The system is equipped with two fans to cool the AVR
electronics. The primary fan is powered by AC during
operation. The secondary fan is powered by 12V DC
through the controller. The fans are monitored during
operation and, if a failure occurs, an alarm is displayed.
WARNING
Moving Parts. Keep clothing, hair, and
appendages away from moving parts. Failure
to do so could result in death or serious injury.
The secondary fan continues to operate for up to one
hour after the generator is shut down (even if the 7.5
amp ATO fuse is removed). Proper cooling must occur
before removing battery connections for maintenance or
other service activity. Be extremely careful when working
near the AVR fan housing.
General Information
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