background image

2

Generac

®

Power Systems, Inc.

Study these SAFETY RULES carefully before installing,
operating or servicing this equipment. Become familiar
with this 

Owner’s Manual

and with the unit. The gen-

erator can operate safely, efficiently and reliably only if
it is properly installed, operated and maintained. Many
accidents are caused by failing to follow simple and fun-
damental rules or precautions.

Generac cannot possibly anticipate every possible 
circumstance that might involve a hazard. The warn-
ings in this manual, and on tags and decals 
affixed to the unit are, therefore, not all-inclusive. If you
use a procedure, work method or operating technique
Generac does not specifically recommend, you must
satisfy yourself that it is safe for you and others. You
also must make sure the procedure, work method or
operating technique that is chosen does not render the
generator unsafe.

Despite the safe design of this generator, 
operating this equipment imprudently, neglecting its
maintenance or being careless can cause 
possible injury or death. Permit only responsible and
capable persons to operate or maintain this equip-
ment.

Potentially lethal voltages are generated by these
machines. Ensure all steps are taken to render the
machine safe before attempting to work on the
generator.

Parts of the generator are rotating and/or hot
during operation. Exercise care near running gen-
erators. 

GENERAL HAZARDS

• For safety reasons, Generac recommends 

that the installation, initial start-up and maintenance
of this equipment is carried out by a
Generac/Guardian Authorized Dealer.

• Installation, operation, servicing and repair of this

(and related) equipment must always comply with
applicable codes, standards, laws and regulations.
Adhere strictly to local, state and national electrical
and building codes.  Comply with regulations the
Occupational Safety and Health Administration
(OSHA) has established.  Also, ensure that the gener-
ator is installed, operated and serviced in accordance
with the manufacturer’s instructions and recommen-
dations.  Following installation, do not do anything
that might render the unit unsafe or in noncompli-
ance with the aforementioned codes, standards, laws
and regulations.

• The engine exhaust fumes contain carbon monoxide,

which can be DEADLY. This dangerous gas, if
breathed in sufficient concentrations, can cause
unconsciousness or even death. For that reason, ade-
quate ventilation must be provided.  Exhaust gases
must be piped safely away from any building or
enclosure that houses the generator to an area where
people, animals, etc., will not be harmed.  This
exhaust system must be installed properly, in strict
compliance with applicable codes and standards.

• Keep hands, feet, clothing, etc., away from drive belts,

fans, and other moving or hot parts. Never remove
any drive belt or fan guard while the unit is operating.

• Adequate, unobstructed flow of cooling and ventilating

air is critical in any room or building housing the gen-
erator to prevent buildup of explosive gases and to
ensure correct generator operation. Do not alter the
installation or permit even partial blockage of ventila-
tion provisions, as this can seriously affect safe oper-
ation of the generator.

• Keep the area around the generator clean and unclut-

tered.  Remove any materials that could become haz-
ardous.

• When working on this equipment, remain alert at all

times. Never work on the equipment when you are
physically or mentally fatigued.

!

!

!

!

DANGER

Important Safety Instructions

Guardian Liquid-cooled 40 kW Generator

SAVE THESE INSTRUCTIONS – The manufacturer suggests that these rules for safe 
operation be copied and posted in potential hazard areas. Safety should be stressed to all
operators and potential operators of this equipment.

!

The engine exhaust from this product

contains chemicals known to the state

of California to cause cancer, birth

defects or other reproductive harm.

WARNING:

!

!

!

SAVE THESE INSTRUCTIONS – This manual contains important instructions that should be
followed during installation and maintenance of the generator and batteries.

!

!

This product contains or emits chemicals

known to the state of California to cause

cancer, birth defects or other reproductive harm.

WARNING:

!

!

Summary of Contents for 004626-1

Page 1: ...d Standby Generators Models 004373 2 40 kW Single phase w 200 Amp Transfer Switch 004626 1 40 kW Single phase w 200 Amp Transfer Switch California Emissions ONLY QUALIFIED ELECTRICIANS OR CONTRACTORS...

Page 2: ...ymbol 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 strongly recommends that th...

Page 3: ...to Initial Start up 11 2 8 2 Transfer Switch 11 2 8 3 Fuel System 11 2 8 4 Generator Set Lubrication 11 2 8 5 Engine Coolant 11 2 8 6 Belt Tension 11 2 8 7 Electrical System 11 2 8 8 Rodent Protectio...

Page 4: ...er s instructions and recommen dations Following installation do not do anything that might render the unit unsafe or in noncompli ance with the aforementioned codes standards laws and regulations The...

Page 5: ...e 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 workers due to backfeed...

Page 6: ...CONNECTION SYSTEMS Figure 1 1 represents a single phase four wire genera tor AC connection system The stator assembly in this system consists of a pair of stationary windings with two leads brought o...

Page 7: ...ncy rpm signals directly from the stator AC power windings Should AC frequency exceed approximately 72 Hertz circuit board action will automatically shut down the engine 1 7 5 OVERCRANK SHUTDOWN After...

Page 8: ...20 cfh LP Gas 004373 2 004626 1 288 cfh 7 9gph 1 9 FUEL REQUIREMENTS AND RECOMMENDATIONS With LP gas use only the vapor withdrawal system This type of system uses the vapors formed above the liquid fu...

Page 9: ...as emergency gener ating sets including the South Coast Air Quality Management District Do not tamper with or disable any part of this system including the exhaust catalyst carburetor oxygen sensor ai...

Page 10: ...on 85 John Street New York N Y 10038 AGRICULTURAL WIRING HANDBOOK obtainable from the Food and Energy Council 909 University Avenue Columbia MO 65201 ASAE EP 364 2 INSTALLATION AND MAINTE NANCE OF FAR...

Page 11: ...ground and or grounding rods For that purpose a GROUND LUG Figure 2 2 is provided on the generator mounting base Consult a qualified electrician for grounding requirements in your area Grounding proce...

Page 12: ...mmediately with water Where electrolyte contacts the eyes flush thoroughly and immediately with water and seek medical atten tion and Spilled electrolyte is to be washed down with an acid neutralizing...

Page 13: ...erate the engine with the oil level below the dipstick ADD mark See Specifications Page 5 and Engine Oil Recommendations Page 7 NOTE This engine is shipped from the manufacturer with SAE 15W 40 oil Th...

Page 14: ...hours and tenths of hours Use the hourmeter along with the periodic maintenance schedule for your generator set 3 1 6 AUTO OFF MANUAL SWITCH See Section 3 2 3 1 7 FAULT INDICATOR LAMP This lamp goes O...

Page 15: ...ch to activate and connect load circuits to the standby power supply load terminal lugs T1 T2 connect to terminal lugs E1 E2 Upon restoration of utility source voltage above a preset level generator c...

Page 16: ...engine may start If engine does start it will shut down automatically in about two 2 minutes Set the generator s main circuit breaker to its ON or closed position The generator is now programmed to st...

Page 17: ...d install and tighten the oil drain hose cap 4 Turn the oil filter Generac part number 0A37970001 Figure 4 2 counterclockwise and remove it Properly dispose of the old filter Figure 4 2 Oil Filter 5 A...

Page 18: ...or is below an acceptable preset level To prevent such automatic start up and possible injury to per sonnel do not connect battery cables until the normal source voltage at the transfer switch is cor...

Page 19: ...15 amp Fuse 4 9 ENGINE COOLANT Check the coolant level in the coolant recovery bottle Add the recommended coolant mixture as necessary See Section 1 10 on Page 7 Periodically remove the radiator pres...

Page 20: ...off the utility power to the transfer switch 5 While the engine is still warm from running drain the oil completely Refill the crankcase with SAE 15W 40 oil having API Service Class SG SH or SJ 6 Att...

Page 21: ...100 H COOLING Engine cooling system X M Coolant X Y Enclosure louvers X X W EXHAUST Exhaust system X EVERY 3 M Retorque Exhaust Manifold X FIRST 100 H AND EVERY 800 H BATTERY Charge and condition X R...

Page 22: ...2 Clean re gap or replace plug s 3 Dirty Blocked air filter 3 Clean or replace as required The engine starts but then 1 Engine oil level low 1 Check oil and add oil as needed shuts down 2 Defective lo...

Page 23: ...CAPACITOR CB1 CIRCUIT BREAKER EXCITATION GCU GOVERNOR CONTROLLER UNIT D1 DIODE 600V 12A HM HOURMETER F1 FUSE 15 AMPS TS1 TS2 TERMINAL STRIP S16 BVM METER BATTERY VOLTAGE AM METER AC OUTPUT CURRENT LE...

Page 24: ...15A BLUE 15 SW2 S3 SW1 178 178 229 178 183 0 2 0 15C S3 S1 14 18 S16 14 65 15C 65 12 67 0 15C 00 67 67 S15 65 S16 VM 64 0 0 0 15 0 S1 6 2 57 57 11 58 7 3 58 S16 183 57 19 65 0 S3 BVM 0 14 S15 S15 14...

Page 25: ...O X X X O X O O X O X O O O O O O O O O X O 1 2 3 OFF POSITION O X X X TO ENGINE CONNECTOR EH 85 6 S16 S15 S1 2 29 R1 D1 4 4 1 0 14 85 56 14 14 13 229 15 TS1 85 S16 PHASE SELECTOR SWITCH S16 S15 162 1...

Page 26: ...4 183 4 VM 64 0 0 HZ AM 0 S15 S15 S16 6 S16 S16 00 2 6 S15 2 S16 6 2 1 1 2 1 9 8 7 F2 K P Q M O N L T R S U B X A V W F H J G D E C E PCB B D A 15C 15 START MANUAL 183 AUTO 239 15A 15C OFF 14 0 160 1...

Page 27: ...Generac Power Systems Inc 25 Section 6 Electrical Data Model Nos 004373 2 004262 1 Guardian Liquid cooled 40 kW Generator Electrical Schematic Engine 4 3L Drawing No 0A4592 B...

Page 28: ...26 Generac Power Systems Inc Section 6 Electrical Data Model Nos 004373 2 004262 1 Guardian Liquid cooled 40 kW Generator Wiring Diagram Engine 4 3L Drawing No 0A4591 B...

Page 29: ...Generac Power Systems Inc 27 Section 6 Electrical Data Model No 004373 2 Guardian Liquid cooled 40 kW Generator Electrical Schematic Stepper Motor Drawing No 0A5858...

Page 30: ...RT CONNECTION CP CONTROL PANEL CONNECTOR LOWER PANEL NB NEUTRAL BLOCK E3 E1 CB2 00 DIRECT 390mm A S CP TS3 TS4 A R NB 57 S3 S15 S1 S16 58 S3 1 0 S15 4 0 57 57 58 0 11 44 33 5 22 58 6 2 FROM STANDARD G...

Page 31: ...PE S1 AS 6 E TP Q 2 K 5 5 F RED 4 4 C AR 1 1 D T2 V 23 W 194 X T1 U N2 T N1 S 183 B 178 J TS3 TS3 TS4 TS4 NB NB 120 240 V 1 PHASE TO CONTROL PANEL CONNECTOR CP THERMAL PROTECTOR BYPASS Section 6 Elect...

Page 32: ...AILURE TO WAIT 30 SEC OFF MANUAL SWITCH TO THE AUTO OFF MANUAL SWITCH TO THE AUTO 20 SECONDS AND THEN RELEASE 20 SECONDS AND THEN RELEASE TIME SWITCH TO ON POSITION FOR TIME SWITCH TO ON POSITION FOR...

Page 33: ...C 0 200 ITEM PART NO QTY DESCRIPTION 32 070042 1 FREQUENCY METER 240V 55 65HZ 33 081988 1 DECAL EXERCISE INFO 34 0C1229 1 DECAL CUST CONN BOX 35 098647 1 ASSY L C ELECT GOV 36 0A3968 1 CAPACITOR FILTE...

Page 34: ...TART IT WILL SHUT OFF AUTOMATICALLY WITHIN 2 MIN PUSH AND HOLD SET EXERCISE TIME SWITCH TO ON POSITION FOR 20 SECONDS AND THEN RELEASE OFF MANUAL SWITCH TO THE AUTO POSITION FAILURE TO WAIT 30 SEC MAY...

Page 35: ...REQUENCY METER 240V 55 65HZ 33 081988 1 DECAL EXERCISE INFO ITEM PART NO QTY DESCRIPTION 34 0C1229 1 DECAL CUST CONN BOX 35 0D3440 1 CONTROLLER B C DPG 2103 36 0A3968 1 CAPACITOR FILTER ASY 37 048766...

Page 36: ...RFACE ASSEMBLY 4 021888 1 LEVER STEPPER MOTOR 5 082508 2 BALL JOINT PLA 25 28 9 036409 2 NUT HEX 1 4 28 STEEL 11 043146 3 SCREW HHC M6 1 0 X 10 G8 8 12 098941A 2 HOUSING GOVERNOR CONNECT 13 098942A 2...

Page 37: ...INGLE ITEM PART NO QTY DESCRIPTION 24 024310 1 PLUG STD PIPE 1 2 STEEL SQ HD 25 0A8785 4 PLUG BUTTON 3 DIA 26 0C4360 8 PLATE VARMINT 27 071693 16 WASHER FLAT 281 ID X 1 0 OD 28 0C2454 16 SCREW TH FRM...

Page 38: ...5 43 40 22 39 7 8 36 13 5 10 11 33 19 31 4 35 26 34 3 34 14 30 28 44 27 9 1 21 43 25 46 40 41 26 17 34 16 38 15 47 29 18 2 Section 7 Exploded Views and Parts Lists Model Nos 004373 2 004626 1 Guardian...

Page 39: ...ART NO QTY DESCRIPTION 23 0A4241 1 PULLEY GROOVED IDLER 24 0C2885 1 PULLEY TENSIONER 25 0A5737C 1 SPACER DC ALTERNATOR 34MM 26 022131 8 WASHER FLAT 3 8 M10 ZINC 27 077456 1 ADAPTOR M12 1 75 3 8 NPT 28...

Page 40: ...38 Generac Power Systems Inc Section 7 Exploded Views and Parts Lists Model Nos 004373 2 004626 1 Guardian Liquid cooled 40 kW Generators Engine Parts Drawing No 0D6980 A...

Page 41: ...IPE 1 8 SOCKET HEAD 21 069939 1 HOUSING THERMOSTAT WATER INLET 22 035606 1 SENSOR HI COOLANT SHUTDOWN 23 0A4930B 1 HEAT SHIELD RIGHT 24 0A4084 1 MOUNT ENGINE 25 029745 3 SCREW HHC 3 8 16 X 1 G5 26 044...

Page 42: ...EEL ADJUSTMENT THREAD IN SENSOR 6 UNTIL CONTACT IS MADE WITH RING GEAR THEN BACK OFF 1 2 TO 3 4 TURN AND TIGHTEN NUT DO NOT ROTATE ENGINE DURING THIS ADJUSTMENT CAUTION NOTE TO ENGINE 8 6 9 17 19 18 2...

Page 43: ...31 12 WASHER FLAT 3 8 M10 ZINC 19 022237 11 WASHER LOCK 3 8 20 022511 11 SCREW HHC 3 8 16 X 1 1 4 G5 21 068113 1 CARRIER REAR BEARING 15 22 068115 1 LOWER PANEL 15 23 043123 4 WASHER LOCK M14 24 05177...

Page 44: ...24 0C4066 A 1 DUCT BOTTOM 25 0C4067 A 1 DUCT FRONT PANEL 26 0C4117 A 1 DUCT FRONT TOP RH 28 0C2634A 1 ASSEMBLY COVER ACCESS 29 0C2454 76 SCREW TH FRM M6 1X16 N WA Z JS 30 022129 2 WASHER LOCK M8 5 16...

Page 45: ...12 040173 2 CLAMP HOSE 5 5 62 62 13 049340 1 BARBED EL 90 1 4 NPT X 3 8 14 036865 1 DRAINCOCK 15 029032 1 HOSE 9 32 ID 64 LG 16 052250 3 TAPE FOAM 1 X 1 29 LG 17 058443 10 SCREW CRIMPTITE 1 4 20 X 5...

Page 46: ...1 HOSE 3 8 ID SINGLE BRAID 9 15 0A4121 1 VALVE PCV 16 082508 1 BALL JOINT PLA 25 28 17 055934Z 1 CLAMP VINYL 1 13 X 406 Z 18 022097 1 WASHER LOCK M6 1 4 19 036409 2 NUT HEX 1 4 28 STEEL 20 0A4632B 1...

Page 47: ...1 CLAMP VINYL 1 13 X 406 Z 18 0A6613 1 GASKET CARB IMPCO 225 19 036409 1 NUT HEX 1 4 28 STEEL 20 0A4632B 1 PLATE AIR CLEANR BOTTOM 21 0A4637 1 FILTER AIR 11 5 CA326 22 0C7820 1 MACHINING CARBURETOR A...

Page 48: ...ITEM PART NO QTY DESCRIPTION 14 025655 1 PLUG STD PIPE 3 4 STEEL SQ HD 15 022132 2 WASHER FLAT 9 16 ZINC 16 051778 2 SCREW HHC M14 2 0 X 25 G8 8 17 028641 1 NIPPLE TOE 3 4 NPT X 2 18 057824 2 CLAMP H...

Page 49: ...78 2 SCREW HHC M14 2 0 X 25 G8 8 17 028641 1 NIPPLE TOE 3 4 NPT X 2 18 057824 2 CLAMP HOSE 16 87 1 50 19 057422 1 HOSE 1 IN ID LP GAS 20 043123 2 WASHER LOCK M14 21 051779 2 NUT HEX M14 2 G8 YEL CHR 2...

Page 50: ...HHC M6 1 0 X 16 G8 8 10 022097 4 WASHER LOCK M6 1 4 11 022473 4 WASHER FLAT 1 4 ZINC 12 049813 2 NUT HEX M6 X 1 00 G8 YEL CHR 13 042568 2 SCREW HHC M6 1 0 x 20MM G8 8 14 077043E 36 FLEXIBLE CONDUIT 1...

Page 51: ...UARDIAN UNITS 7 0A4010 2 SCREW HHC M8 1 25 X 60 FT G8 8 8 052858 2 NUT LOCK FLANGE M8 1 25 9 049820 2 NUT LOCK HEX M8 1 25 NYLON INSERT 11 023152 1 SCREW HHC 3 8 16 X 3 4 G5 12 022131 1 WASHER FLAT M1...

Page 52: ...ORQUES RECOMMENDED TERMINAL TIGHTENING TORQUES LUG TO CIRCUIT BREAKER LUG TO CIRCUIT BREAKER FASTEN COMPRESSION FASTEN COMPRESSION 52 52 40 40 40 40 ITEM ITEM NEUTRAL BLOCK NEUTRAL BLOCK CIRCUIT BREAK...

Page 53: ...NUT HEX 1 4 20 STEEL 40 0D5574 1 CB 0200A 3P 600V S FD6 LL ITEM PART NO QTY DESCRIPTION 41 0D5595A 1 KIT CB MOUNT S FD 390S PARTS SHOWN BELOW I N S 42 50 42 0D5689 1 PLATE CB MOUNT S FD 390S 43 0D5693...

Page 54: ...52 Generac Power Systems Inc Section 7 Exploded Views and Parts Lists Model No 004626 1 Guardian Liquid cooled 40 kW Generators Exhaust Muffler Drawing No 0D6976 A...

Page 55: ...18 042907 16 SCREW HHC M8 1 25 X 16 G8 8 ITEM PART NO QTY DESCRIPTION 19 080762 8 BOLT U 3 8 16 X 2 62 20 022237 16 WASHER LOCK 3 8 21 022241 16 NUT HEX 3 8 16 STEEL 22 0D5187 1 SHIELD HEAT CROSSOVER...

Page 56: ...ET EXHAUST SHIELD 11 0C4305 1 SHIELD A GRP HEAT ITEM PART NO QTY DESCRIPTION 12 0C2454 2 SCREW TH FRM M6 1 X 16 N WA Z JS 13 0C3433A 4 CLAMP BAND 2 5 14 022129 12 WASHER LOCK M8 5 16 15 022145 12 WASH...

Page 57: ...Generac Power Systems Inc 55 Section 8 Notes Guardian Liquid cooled 40 kW Generators...

Page 58: ...8 HOLES ON BOTTOM 1 R677 R26 66 TYP NOTE 5 NOTE 3 2397 94 37 37 1 44 794 31 28 STUB UP AREA 71 2 79 835 32 87 53 2 09 936 36 85 103 4 06 NATURAL GAS INLET 3 4 NPT FEMALE NOTE 9 454 17 87 A1 ALT AIR OU...

Page 59: ...AY BE USED FOR CIRCUIT BREAKER STUB UP LOCATION 6 MAIN LINE CIRCUIT BREAKER 5 2 5 I D FLEX EXHAUST 3 EXHAUST MUFFLER SUPPORT BRACKETS SUPPLIED WITH OPTIONAL COMPARTMENT MODIFICATIONS REQUIRED FOR SEE...

Page 60: ...wear and tear accident misuse abuse negligence or improper installation As with all mechanical devices the Generac engines need periodic part s service and replacement to perform well This warranty wi...

Reviews: