Owner’s Manual
ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS
SHOULD ATTEMPT INSTALLATION!!
This manual should remain with the unit.
Liquid-cooled, Prepackaged
Standby Generators
Model Number: 004988-2
Page 1: ...Owner s Manual ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS SHOULD ATTEMPT INSTALLATION This manual should remain with the unit Liquid cooled Prepackaged Standby Generators Model Number 004988 2...
Page 2: ...plosion hazard This symbol points out potential fire hazard This symbol points out potential electrical shock hazard The operator is responsible for proper and safe use of the equipment Generac strong...
Page 3: ...olation Method 10 2 6 Total Circuit Isolation Method 10 2 7 Grounding the Generator 10 2 8 Generator AC Neutral Connections 10 2 9 Transfer Switch Start Signal Connections 10 2 10 Battery Installation...
Page 4: ...ener ator is installed operated and serviced in accordance with the manufacturer s instructions and recommen dations Following installation do nothing that might render the unit unsafe or in noncompli...
Page 5: ...is operating Failure to isolate the two electric system power sources from each other by such means will result in damage to the generator and may also result in injury or death to utility power work...
Page 6: ...ture dust dirt lint construction grit and cor rosive vapors If a transfer switch is not included one may be pur chased separately from a Generac Authorized Dealer 1 3 AUTOMATIC SYSTEM OPERATION When t...
Page 7: ...WITCH This switch is normally closed N C but is held open by engine oil pressure during engine running Should operating oil pressure drop below about 8 10 psi 55 68 kPa the switch contacts close the e...
Page 8: ...ing when the low battery condition occurs the engine will continue to run as long as possible Battery voltage is NOT monitored during the crank cycle 1 7 8 ALARM RESET If the engine control board shut...
Page 9: ...r set up should be 11 inches to 14 inches of water column 0 4 to 0 5 psi at all load ranges 1 12 RECONFIGURING THE FUEL SYSTEM NOTE All models are configured for natural gas from the factory To reconf...
Page 10: ...t will power The critical essential loads may need to be grouped together and wired into a sepa rate emergency distribution panel This generator can be installed in conjunction with an engineered Gene...
Page 11: ...ect the unit Install the generator on high ground where water levels will not rise and endanger it This genset must be installed on a level surface The base frame must be level within 1 2 inch all aro...
Page 12: ...lly conductive parts of this equip ment to be properly connected to an approved earth ground and or grounding rods For that purpose a GROUND LUG Figure 2 2 is provided on the gener ator mounting base...
Page 13: ...is spilled flush the affected area immediately with clear water Spilled electrolyte is to be washed down with an acid neutralizing agent A common practice is to use a solution of one pound 500 grams b...
Page 14: ...operly filled with the recommended coolant mixture Check the system for leaks and other problems See Specifications Section 1 10 and Coolant Section 1 15 2 11 6 BELT TENSION Check the engine fan belt...
Page 15: ...oad If the fuse has melted open because of an overload engine cranking and startup cannot occur If the fuse needs to be replaced use only an identical 15 amp replacement fuse Type AGC 3 2 4 4 0 AMP IN...
Page 16: ...ource and the generator can be shut down as fol lows Verify that UTILITY power supply voltage to the transfer switch has been positively turned OFF using whatever means provided such as utility main l...
Page 17: ...3 Flush cooling system D FIRST 100 OPERATING HOURS 1 Change engine oil and oil filter After initial change service engine oil and filter at 150 oper ating hours or 6 months whichever comes first 2 Re...
Page 18: ...AN PERFORM 4 5 1 CHECK ENGINE OIL LEVEL Refer to Checking Fluid Levels in Section 4 4 4 5 2 CHECK BATTERY Check battery fluid level each week as outlined under Check Fluid Levels Check battery cables...
Page 19: ...all FILTER and tighten by hand only DO NOT OVERTIGHTEN 6 Remove OIL FILL CAP Add recommended oil see SPECIFICATIONS DO NOT FILL ABOVE THE DIPSTICK FULL MARK Crankcase oil capacity is 4 0 U S quarts 3...
Page 20: ...er immediately Always wear safety glasses rubber apron and gloves when handling a battery Batteries give off explosive hydrogen gas while charging The gas can form an explosive mixture around the batt...
Page 21: ...tery cables are connected Be sure the UTILITY power supply is turned off or sparking may occur at the battery posts as the cables are attached and cause an explosion 4 6 4 BATTERY REPLACEMENT When rep...
Page 22: ...FORE removing the battery cable to prevent an over current condi tion from burning out sensitive control panel components and circuits Following all maintenance reverse these steps to insure the unit...
Page 23: ...mal protection level Correct as necessary 5 Check the natural gas delivery system on gas engine driven units Tighten connections as necessary 6 Check the air inlets and outlets for debris Clean as nec...
Page 24: ...ons or components and abnormal operating conditions Correct as necessary 14 Start and exercise the unit at full rated load use a load bank if the site load is not enough for at least 2 hours looking f...
Page 25: ...park plugs 3 Clean regap or replace plugs Engine starts then shuts down 1 Engine oil level is low 1 Check oil and add oil as needed 2 Engine is overheated 2 Check cooling system for leaks 3 Defective...
Page 26: ...24 Generac Power Systems Inc Section 6 Notes Guardian Liquid cooled 27 kW and 30 kW Generators...
Page 27: ...Generac Power Systems Inc 25 Section 7 Installation Diagram Guardian Liquid cooled 27 kW and 30 kW Generators Installation Diagram Drawing No 0E8695...
Page 28: ...Y COIL TRANSFER RELAY COIL TRANSFER SWITCH 15E N2 N1 13A 23 183 178 14 13 13A 0 14 14A 16 15 IC 13 13 11 14 13A 15A 239 1b 16 1a 15 1 16 16 15 2a 2b 1 15 VOLT UL LISTED UNLESS ALL WIRES ARE 18 AWG 300...
Page 29: ...0 86 0 0 1 7 10 11 12 9 8 4 5 6 2 3 15A 224 225 15E 239 14 14A 0A 13 0 0 11 14 13 12 8 9 10 6 7 85 14A 225 66 C1 239 15E 0 RED 0 14 85 85 0 BLK FS 0A 0 0 16 16 13 GND2 0 0 0 4 16 10 0 0 SM 4 10 16 3 7...
Page 30: ...ISER SWITCH AUTO OFF MANUAL FUSE B C 4A AGC TYPE TERMINAL BLOCK INTERCONNECT TRANSFORMER 1 56 VA 240 16 VAC NEUTRAL BLOCK LEGEND CONT RL1 SW1 SW2 TR1 NB F2 ICT F1 RELAY 1 2 4 3 5 6 TRANSFER SWITCH 5 C...
Page 31: ...MODULE ON DISTRIBUTOR SWITCH LOW OIL PRESSURE SENSOR COOLANT LEVEL IGNITION COIL STARTER MOTOR 14A 13 14 15E 224 225 15A 239 11 12 10 7 9 8 4 6 5 2 1 3 0A 0 0 0 23 66 PCB GOV 14A 225 85 66 4 6 5 1 3 2...
Page 32: ...E 30 TO 44 35 34 3 36 33 44 42 22 20 32 38 18 31 20 TO STARTER STARTER BOLT TO BLOCK ENGINE 18 TO 11 1 12 10 14 REAR BEARING 13 15 37 14 CARRIER 3 4 16 2 30 Generac Power Systems Inc Section 9 Explode...
Page 33: ...21 022129 1 WASHER LOCK M8 5 16 22 045771 1 NUT HEX M8 1 25 G8 YEL CHR 23 051756 1 SCREW HHC M10 1 5 X 20 G8 8 24 046526 1 WASHER LOCK M10 25 022131 1 WASHER FLAT 3 8 M10 ZINC 26 055934M 1 CLAMP VINYL...
Page 34: ...LATION TYPICAL OF ROOF PANEL THAT TO A 4 53 4 35 SUPPORT RADIATOR 33 44 55 5 5 53 4 36 4 18 4 26 58 8 5 4 8 4 A A A A 29 12 13 16 17 52 54 B 20 11 10 15 14 19 2 59 28 4 1 17 16 42 40 9 18 23 57 57 5 5...
Page 35: ...BRACKET STIFFENING BACK 27 0E8001 1 MUFFLER BOX 28 0E8060 1 ROOF W GAS SPRING MNT 3 0L FRD 29 0E8406 1 BRACE FRONT TOP 30 0D3037A 1 LATCH 1 4 TURN NONLOCKING 31 0C7781 2 PAWL DOOR HSB 32 0E7794 1 SUPP...
Page 36: ...34 Generac Power Systems Inc Section 9 Exploded Views and Parts Guardian Liquid cooled 27 kW and 30 kW Generators Control Panel Drawing No 0E7118 K...
Page 37: ...TROL PANEL 34 0D4698 REF BLOCK TERM 20A 6 X 3 X 1100V 35 0E7252 1 BRACKET CB 221 5 X 102 36 0C1229 1 DECAL WARNING ELECTRICAL SHOCK ITEM PART NO QTY DESCRIPTION 37 0C1127 1 DECAL AVR COVER 38 0A1441B...
Page 38: ...18 19 48 48 42 41 44 45 30 81 42 78 49 49 46 47 47 4 43 42 1 26 42 47 81 2 38 42 69 28 REAR UPPER BAFFLE 40 36 5 6 7 35 37 15 36 3 8 14 8 12 29 73 10 82 33 36 34 35 2 84 27 Section 9 Exploded Views a...
Page 39: ...2 SCREW HHC M12 1 75 X 65 G8 8 46 051769 3 WASHER LOCK M12 ITEM PART NO QTY DESCRIPTION 47 049808 2 WASHER FLAT M12 48 051430 6 WASHER SHAKEPROOF INT 1 2 49 045773 3 NUT HEX M12 1 75 G8 YEL CHR 50 0E...
Page 40: ...8 9 3 21 27 PUMP TO WATER 4 12 17 6 15 7 1 15 20 3 22 24 24 TO 2 12 TO A 18 13 14 12 Section 9 Exploded Views and Parts Guardian Liquid cooled 27 kW and 30 kW Generators Radiator Drawing No 0E8528 B 3...
Page 41: ...2 035685 4 CLAMP HOSE 28 1 32 2 25 13 0E8562 1 FAN GUARD HSB 14 058443 4 SCREW CRIMPTITE 1 4 20 X 5 8 15 0C2454 9 SCREW TH FRM M6 1 X 16 N WA Z JS 17 048031C 1 CLAMP HOSE BAND 1 4 18 029032 1 HOSE 9 3...
Page 42: ...s Inc 28 B 31 10 16 4 2 17 5 9 1 7 6 29 32 30 11 29 15 8 3 6 3 33 29 14 TO B 26 27 18 43 41 40 21 28 26 39 Section 9 Exploded Views and Parts Guardian Liquid cooled 27 kW and 30 kW Generators Fuel Sys...
Page 43: ...OR BOSCH 32 GOVERNOR 21 057753B 1 HOSE 1 5 ID X 2 LG 20R4 25 047487 4 SCREW SHC M6 1 0 X 18 G12 9 26 022097 8 WASHER LOCK M6 1 4 27 051751 4 SCREW HHC M6 1 0 X 50 G8 8 28 035685 2 CLAMP HOSE 28 1 32 2...
Page 44: ...Systems Inc 3 LOCKTIGHT LOCKTIGHT 7 15 17 8 7 6 18 4 16 LEADS 5 2 9 13 21 19 20 14 10 11 12 30 1 31 Section 9 Exploded Views and Parts Guardian Liquid cooled 27 kW and 30 kW Generators Alternator Dra...
Page 45: ...VCOR FAN 10 75 X 2 W PRESS DIS 7 046526 8 WASHER LOCK M10 8 051755 4 SCREW HHC M10 1 5 X 16 G8 8 9 04576100BK 4 STUD M14 2 0 X 490 G5 ZINC 3 0L FORD 2 5L FORD 04576100BF 4 STUD M14 2 0 X 540 G5 ZINC 1...
Page 46: ...NO QTY DESCRIPTION 11 022129 10 WASHER LOCK M8 5 16 12 045771 2 NUT HEX M8 1 25 G8 YEL CHR 13 0C2454 4 SCREW TH FRM M6 1X16 N WA Z JS 17 044149 2 GASKET EXHAUST RING 18 0E0170 2 EXHAUST BLANKET 750MM...
Page 47: ...1 4 20 STEEL 10 037561 1 NUT WING 1 4 20 NYLK ITEM PART NO QTY DESCRIPTION 11 049226 8 WASHER LOCK M5 12 049815 4 SCREW HHC M5 0 8 X 16 G8 8 13 052619 4 SCREW HHC M5 0 8 X 20 G8 8 14 051713 4 WASHER...
Page 48: ...el enclosures that are rusting due to the improper installation location in a harsh or saltwater environment or scratched where integrity of paint applied is compromised Failures caused by any contami...
