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Section 3 — Operation
Guardian Liquid-cooled 27 kW and 30 kW Generators
2.11.1 PRIOR TO INITIAL START-UP
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Prior to initially starting the generator, it must be properly prepared for use. Any attempt to crank or start the engine before it has been properly serviced with the recommended types and quantities of engine fluids (oil, coolant, fuel, etc.) may result in an engine failure.
Before starting the generator for the first time, the installer must complete the following procedures. For follow-up maintenance information and/or service intervals, please refer to Section 4, “Maintenance.”
2.11.2 TRANSFER SWITCH
If this generator is used to supply power to any electrical system normally powered by an electric utility, the National Electrical Code requires that a transfer switch be installed. The transfer switch prevents electrical backfeed between two different electrical systems (for additional information, see the applicable transfer switch manual for this unit). The transfer switch, as well as the generator and other standby components, must be properly located and mounted in strict compliance with applicable codes, standards and regulations.
2.11.3 FUEL SYSTEM
Make sure the fuel supply system to the generator (a) delivers the correct fuel at the correct pressure and
(b) is properly purged and leak tested according to code. No fuel leakage is permitted. See
“Specifications” (Section 1.10) for more information.
2.11.4 GENERATOR SET LUBRICATION
Check the engine crankcase oil level before operating and add oil to the proper level – the dipstick “FULL” mark. Never operate the engine with the oil level below the dipstick “ADD” mark. See “Specifications”
(Section 1.10) and “Engine Oil Recommendations”
(Section 1.14).
NOTE:
This engine is shipped from the manufacturer with 5W-20 oil. This oil should be changed after
30 hours of operation.
2.11.5 ENGINE COOLANT
Have the engine cooling system properly filled with the recommended coolant mixture. Check the system for leaks and other problems. See “Specifications”
(Section 1.10) and “Coolant” (Section 1.15).
12 Generac ® Power Systems, Inc.
2.11.6 BELT TENSION
Check the engine fan belt tension and condition prior to placing the unit into service and at recommended intervals. Belt tension is correct when a force of approximately 22 pounds (10 kg), applied midway between pulleys, deflects the belt about 3/8- to 5/8inch (10 to 16 mm).
2.11.7 ELECTRICAL SYSTEM
Make sure the generator is properly connected to an approved earth ground and/or ground rod.
Make sure the generator battery is fully charged, properly installed and interconnected, and ready for use.
Check to ensure that there are no loose electrical connections. Restrain any loose wires to keep them clear of any moving generator set components.
3.1
USING A STANDARD “GTS”
TRANSFER SWITCH
When required, the pre-packaged standby generator can be installed with a standard Generac “GTS” type automatic transfer switch.
In this application, the GTS is responsible for utility sensing, weekly exercising, and load transferring.
Position two of the four-position dip switch is used to turn over this control to the GTS.
Pos2 ON — GTS Application
• The control board will NOT monitor utility.
• The control board will NOT perform a weekly exercise. (The five red LEDs will not flash in this mode.)
• The control board will NOT activate the transfer output.
• The control board WILL monitor all engine conditions and shut down on all the faults listed in this document.
Pos2 OFF — ATS Application
• The control board will perform all of the automatic features listed in this document.
• The two-wire start connections should NOT be used.
GTS Mode Operation
When in GTS mode, the control board will respond as follows based on the AUTO/OFF/MANUAL switch position.
OFF — The generator will not start and run in this position.
MANUAL — The control board will start and run the generator whenever the switch is in the manual position.
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