SPECIFICATIONS FOR SENTRY-PRO AUTOMATIC OPERATED STANDBY SETS WITH LPG OR NATURAL GAS FUELED ENGINES.  MODELS SHOWN BELOW ARE ACTUALLY, THE SAME GEN-SET, BETWEEN LPG AND NAT. GAS FUEL.  NAT. GAS HAS AN AVERAGE 10% TO 20% REDUCTION IN BTU CONTENT COMPARED TO LPG FUEL, THEREFORE LOWERING ENGINE HP, WHICH LOWERS KW OUTPUT.  FOLLOWING ARE SPECIFICATIONS COVERING EACH MODEL WITH BOTH FUELS.

1 PHASE MODELS

3 PHASE MODELS

CONTROL SPECIFICATIONS

DETAIL SINGLE MODEL 4-PAGE SPECIFICATION SHEETS

SP-850, 60 & 50 HZ, 1 & 3 PHASE

ALL 50 HZ DRY-FUEL COMBO SPECIFICATION SHEET

TYPICAL SENTRY-PRO DRY FUEL, AUTOMATIC OPERATION

When normal power fails, SENTRY-PRO automatically starts and supplies your selected emergency loads.  Upon return of normal power, SENTRY-PRO automatically shuts down and returns emergency loads back to normal power.  These actions require no operator to be present.  All liquid cooled, 1800 RPM dry fuel standby generators have automatic engine and generator control functions occur through the "SENTINEL-SCOUT" microprocessor based, digital controller.

A TYPICAL "ENGINE START" ACTION IS AS FOLLOWS:
1.  A time delay of 10 second (adjustable) to engine crank (eliminates nuisance starts on normal power glitch losses).
2.  A (3) cycle engine crank occurs:  15 second engine crank, followed by 15 second engine rest.  after (3) crank attempts, a final shutdown occurs.  This action saves the starting battery and engine starter motor from overheat damage.  If engine doesn't start in (3) attempts, it becomes a permanent shutdown & a service technician is required.
3.  A time delay to transfer, allows generator set to start, stabilize and warm-up before electric load is transferred to emergency generator power (adjustable).

A TYPICAL "ENGINE STOP" ACTION IS AS FOLLOWS:
1.  A time delay to retransfer, allows return of lost utility power to stabilize before re-transfer of electric load, back to utility power. (adjustable)
2.  A time delay to "engine cool down", allows load to be removed from gen-set, and engine runs un-loaded for a predetermined cool-down period. (adjustable)
3.  At any time an engine or generator would mal-function, the entire gen-set system would immediately shut down.  The fault must be corrected, the control system must be "Reset" and gen-set is ready to run again.

Please review SENTINEL-SCOUT to learn the full features and benefits of this digital controller allowing engine and generator protection controls.  This controller is installed only on 1800 RPM, 4-pole gen-sets.

The automatic transfer switch is not included with any 4-pole, 1800 RPM, standby generators, but rather, it is offered as a separate item, due to the many choices of different styles, voltages and designs.  A 100 amp through 1200 amp, UL-1008 certified auto transfer switch is available.  Our new "Service Entrance / Auto Transfer Switch" is  now available.  This device combines the required service entrance disconnect (a molded case circuit breaker) with the automatic transfer switch.  All pre-wired and installed into one enclosure.  This saves installation time and costs, over the two individual device methods of the past.  Also, view "Automatic Transfer Switch" for specifications on both standard automatic transfer switches and our new service entrance transfer switch.

Gillette Generators, Inc.
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