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

GENERATOR SPECIFICATIONS

CONTROL SPECIFICATIONS

DETAIL SINGLE MODEL 4-PAGE SPECIFICATION SHEETS

SPS-100, 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 2-pole, 3600 RPM, SPH & SPV series, 1 phase or 3 phase sets can use almost any 2-wire controlled automatic transfer switch (ATS), whether it's our model or customer's furnished 2-wire ATS

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, 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 returned to restored utility power.  The 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.

The automatic transfer switch is included with standby generators as a "packaged" standby system, or generator is offered as a separate item, so that customer furnished ATS or other 2-wire sensing system can be used.  A choice of 100 amp or 200 amp, UL-1008 certified auto transfer switch can be selected Also, view "100 & 200 Amp Automatic Transfer Switch" for specifications on both transfer switches.

All air cooled, residential standby sets, at 3600 RPM, will not have SENTINEL-SCOUT  These gen-sets will be automatically controlled by a digital microprocessor, giving protection for: auto start-stop upon demand of sensor signals • time delay for engine crank cycle • 3 cycle engine crank attempt before final shutdown • low oil level auto shutdown • over heat auto shut down • over speed and under speed auto shut down • low battery voltage auto shutdown • time delay for engine cooling auto shutdown after utility power is restored.