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Siemens SG020 - page 1
ST ANDBY GENERA T OR O WNER'S MANU AL This manual should remain with the unit. A ne w standar d of reliability Serial Number SG020 Series 1.6L 20kW — CAUTION — ONL Y QU ALIFIED ELECTRICIANS OR CONTRA CT ORS SHOULD A TTEMPT INST ALLA TION! DEADL Y EXHA UST FUMES. OUTDOOR INST ALLA TION ONL Y! N ot i nt ended f or ...
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Siemens SG020 - page 2
Standby Generator Sets T able of Contents SECTION P AGE SAFETY RULES ................................................ 1-1 INTRODUCTION ..................................................... 1-3 Read this Manual Thoroughly ................................... 1-3 Operation and Maintenance ...................................... 1-3 How to Obtain Servic ...
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Siemens SG020 - page 3
Study these SAFETY RULES carefully before install- ing, operating or servicing this equipment. Become familiar with this Owner’s Manual and with the unit. The generator can operate safely , efficiently and reli- ably only if it is properly installed, operated and maintained. Many accidents are caused by failing to follow simple and fundamental ru ...
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Siemens SG020 - page 4
• Before performing any maintenance on the gen- erator , disconnect its battery cables to prevent accidental start -up. Disconnect the cable from the battery post indicated by a NEGA TIVE, NEG or (–) first. Reconnect that cable last. • Never use the generator or any of its parts as a step. Stepping on the unit can stress and break parts, and ...
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Siemens SG020 - page 5
1-3 I NTRODUCTION Thank you for purchasing this model of the standby generator set product line. Every effort was expended to make sure that the information and instructions in this manual were both accurate and current at the time the manual was written. However , the manufacturer reserves the right to change, alter or otherwise improve this produ ...
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Siemens SG020 - page 6
I DENTIF ICA TION R E C OR D D A T A LA BE L Every generator set has a DA T A LABEL that contains important information pertinent to the generator . The data label, which can be found attached to the gen- erator’s lower connection box, lists the unit ’s serial number and its rated voltage, amps, wattage capacity , phase, frequency , rpm, power ...
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Siemens SG020 - page 7
E QUIPM ENT DE SCRI PTION This equipment is a revolving field, alternating cur - rent generator set. It is powered by a gaseous fueled engine operating at 1800 rpm for 4-pole direct drive units, 3600 rpm for 2-pole direct drive units and 2300 - 3000 rpm for quiet drive gear units. See the Specifications section for exact numbers. The unit comes com ...
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Siemens SG020 - page 8
ENGI NE P RO TE CTIVE DEVICE S The standby generator may be required to operate for long periods of time without an operator on hand to monitor such engine conditions as coolant tempera- ture, oil pressure or rpm. F or that reason, the engine has several devices designed to protect it against potentially damaging conditions by automatically shuttin ...
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Siemens SG020 - page 9
F U E L SYST E M FUE L RE QUIRE MEN T S The standby generator may be equipped with one of the following fuel systems: • Natural gas fuel system • Propane vapor (PV) fuel system Recommended fuels should have a Btu content of at least 1,000 Btus per cubic foot for natural gas; or at least 2,520 Btus per cubic foot for LP gas. Ask the fuel supplie ...
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Siemens SG020 - page 10
SP E CIF ICA TIONS GEN ERA T OR T ype ............................................................................. Synchronous Rotor Insulation .................................................................... Class F Stator Insulation ................................................................... Class F T otal Har monic Distor tion ..... ...
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Siemens SG020 - page 11
COLD WEA THER KIT F or cold climates, optional cold weather kit (part number 0F6148) is recommended. The kit includes: • Battery W armer • 4” Junction Box with hardware • 6 qt. pack 5W -30 synthetic oil (engine) R E C ONF IGU RI NG TH E FU EL SY S TEM NOTE: All models are configured for natural gas or LP vapor from the factory . T o reconfi ...
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Siemens SG020 - page 12
GEN ERA T OR A C LEAD C ON NECTIONS See “V oltage Codes”. This generator may be rated at any one of three voltages, either single -phase or three -phase. The electrical wires in the unit ’s A C con- nection (lower) panel should be installed according to the number of leads and the voltage/phase required for the application. If there are any q ...
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Siemens SG020 - page 13
I NS T ALLA TION Refer to the separate “Installation Guide” supplied with the unit. P REP AR A TION BEFOR E ST ART -UP The instructions in this section assume that the standby generator has been properly installed, ser - viced, tested, adjusted and otherwise prepared for use by a competent, qualified installation contractor . Be sure to read th ...
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Siemens SG020 - page 14
S T ART -U P CH E CKLIS T Before working on the generator , ensure the fol- lowing: • The AUTO/OFF/MANU AL switch is in the OFF position. • The 120V AC supply to the battery charger is switched OFF . P REP AR A TION FOR ST ART -UP • Ensure that the 120V AC circuit breaker to the bat - tery charger is open. • Remove the fuse from the the ...
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Siemens SG020 - page 15
GEN ERA T OR C ONTROL AN D OP ERA TION Refer to the appropriate control panel operator’s manual for this unit. OP ERA TI NG U N IT WITH MAN U AL TR ANSFER SWIT CH If the generator was installed in conjunction with a transfer switch capable of manual operation only , the following procedure applies. A manually operated transfer switch is one that ...
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Siemens SG020 - page 16
MAI NTENANCE PER FOR M ED B Y SERVICE F ACI LITIES Before working on the generator , ensure the fol- lowing: • The AUTO/OFF/MANU AL switch is in the OFF position. • The 15A fuse has been removed from the con- trol box. • The 120V AC supply to the battery charger is switched OFF . EVER Y TH R EE MONTHS 1. Check battery condition. 2. Inspec ...
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Siemens SG020 - page 17
Figure 10.1 - Oil Dipstick and Oil Fill Cap OIL FILL CAP OIL DIPSTICK B A TTE R Y FL UID Check battery electrolyte fluid based on the Maintenance Schedule. Fluid should cover separa- tors in all battery cells. If fluid level is low , add dis - tilled water to cover tops of separators. DO NOT USE T AP W A TER IN BA TTERY . ENGI NE COOLANT Check cool ...
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Siemens SG020 - page 18
CHANGI NG ENGIN E OIL Refer to maintenance performed by service facilities for engine oil and filter change frequencies. Drain the oil while the engine is still warm from run- ning . This means warm up the engine, shut it down and drain immediately as follows: 1. Remove OIL DRAIN HOSE from its retaining clip. 2. Loosen and remove OIL DRAIN HOSE CAP ...
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Siemens SG020 - page 19
M IS CELLAN EOUS MAINTENANCE CLEAN ING TH E GENER A T OR Keep the generator as clean and as dry as possible. Dirt and moisture that accumulates on internal gen- erator windings have an adverse effect on insulation resistance. P eriodically clean generator exterior surfaces. A soft brush may be used to loosen caked on dirt. Use a vacuum system or dr ...
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Siemens SG020 - page 20
SERVICE S CH EDULE The following is a recommended maintenance schedule for small standby and residential generator sets. The established intervals in the schedule are the maximum recommended when the unit is used in an average service application. They will need to be decreased (performed more frequently) if the unit is used in a severe applica- ti ...
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Siemens SG020 - page 21
Maintenance Level 1 Level 2 Level 3 Level 4 T asks Recom- T ask Required T ask Required T ask T ask mended Comp . to be done Comp . to be done Comp. Required Comp. to be done (Date- 3 months/ (Date- Semi- (Date- to be done (Date- monthly Initials) Break-in Initials) annually Initials) Annually Initials) 10 Hrs. 30 Hrs. 50 Hrs. 100 Hrs. 1. Disable t ...
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Siemens SG020 - page 22
Maintenance Level 1 Level 2 Level 3 Level 4 T asks Recom- T ask Required T ask Required T ask T ask mended Comp . to be done Comp . to be done Comp. Required Comp. to be done (Date- 3 months/ (Date- Semi- (Date- to be done (Date- monthly In itials) Break-in Initials) annually Initials) Annually Initials) 10 Hrs. 30 Hrs. 50 Hrs. 100 Hrs. 13. Initiat ...
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Siemens SG020 - page 23
TROU BLESHOO TI NG GU IDE P ROBLEM CAUSE C OR RECTION Engine won’t crank. 1. 15 amp fuse blown. 1. Replace fuse. 2. Loose or corroded or defectiv e 2. Tighten, clean or replace batter y cables. battery cables as necessar y . 3. Defectiv e star ter contactor . 3. Replace contactor .* 4. Defectiv e star ter motor . 4. Replace star ter motor .* 5. D ...
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Siemens SG020 - page 24
Standby Generator Sets Notes ...
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Siemens SG020 - page 25
Standby Generator Sets Notes ...
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Siemens SG020 - page 26
Standby Generator Sets Notes ...
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Siemens SG020 - page 27
Standby Generator Sets Notes ...
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Siemens SG020 - page 28
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Siemens SG020 - page 29
1 0F71 35 1 BREAKE R TRA Y BA CK/BOTT OM 2 0F70 22 1 SUPP ORT CO NTROL P ANEL SIDE R H 3 0F70 21 1 SUPP ORT CO NTROL P ANEL SIDE L H 4 0F72 60 1 COVER CI RC UIT BRE AKE R 2P 0F71 36 1 COVE R CI RC UIT BREA KE R 3P 5 0F 6156 1 PL ATE WIR E SNGL GAL V 6 0F44 64 1 DECA L CU ST CO NN 120V UTILITY 7 0D46 9 8 REF BL O CK TE RM 20A 6 X 3 X 1100V 8 0F38 24 ...
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Siemens SG020 - page 30
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Siemens SG020 - page 31
1 09 86 7 5 1 ASSY RTR 20 KW 2PH 09893 6 1 ASS Y RTR 25 KW 2P H 2 0G 0820 1 HOUSI NG BL OWER M ACHINE D 1.6L 3 0G10 19 1 GUARD BLOWER HO USING 1.6L 4 020746 4 SCR EW PPHM M5 -0 .8 X 8 ZINC 5 04 9226 4 WASHE R LOCK M5 6 05 1713 4 WASHE R FL AT M5 7 02 2129 4 WASHE R LOCK M8- 5/16 8 0F82 18 1 STR 102 20 AD 1 CP L 0F822 0 1 STR -102-20 GD1 C PL 0G131 ...
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Siemens SG020 - page 32
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Siemens SG020 - page 33
C O M P O N EN T S IN C L U D ED IN 0 G 1 2 9 1 E 1 0F 18 23A 1 E NCL HSB CONTROL PANE L 2 0F 30 78 1 COVE R CONTR OL PANE L 3 0F 26 06 1 HI NGE C ONTI NUOUS H- PANE L 4 036261 6 RIVET P O P .125 X .275 SS 5 043181 4 SCR E W PH M M 3 -0.5 X 10M M 6 0527 77 7 WASHER F LAT M3 7 0G130 3B 1 AS S Y P C B C P L2 C TR L R 36 00 RP M 8 0F 126 2 4 H O LD ER ...
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Siemens SG020 - page 34
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Siemens SG020 - page 35
1 0F7211 1 SUP PORT RADI ATOR L H SIDE 2 0G07 60 1 VE N T U RI 16" DI A F A N 3 0F7210 1 S UPPORT R ADIATOR RH SIDE 4 0E98 37B 1 RADI ATOR 1. 6L CH Y 5 0F0230 B 1 FAN COOL 16" DI A 8 BLADE 6 0465 26 5 WASHE R LOCK M10 7 0G0910 1 LO WE R RA DI ATOR HOSE 1.6 L 8 099 502 4 CLA MP H OSE # 24 B 1.06 -2.00 9 06986 0C 1 HOSE OIL DRAIN ASSY 21&qu ...
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Siemens SG020 - page 36
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Siemens SG020 - page 37
1 0F3 408B 1 BAT TERY T RAY C 1 CPL 2 0F34 11 1 S TRAP BAT TE RY RETAI NM E NT 3 02550 7 1 WASHE R SH AKEPRO OF EX T 7/1 6 STL 4 05998 0 1 SCRE W HH C M10- 1. 5 X 25 G10. 9 5 02212 9 1 WAS HER LO CK M 8-5/ 16 6 07748 3 REF BAT T ERY 12V DC 75-AH 26 7 05033 1A 1 BAT T POST COVE R RE D + 8 05033 1 1 BATT POST COVER B LK - 9 03 8805J 1 CA BLE BAT TERY ...
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Siemens SG020 - page 38
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Siemens SG020 - page 39
1 0G0759 1 MOU NTIN G BASE 1. 6L 2 02 7482 2 WASHE R SH AKEPROO F EX T 5/1 6 STL 3 07 0936 2 DAMPE NER VI BRATIO N 4 07093 6C 2 VIB. ISO. 7 0-75 DU RO 5 03 92 5 3 8 SCREW HH C M 8-1. 25 X 20 G8.8 6 02 2145 12 WAS HER FL AT 5/ 16 ZI NC 7 022129 12 WA SHER LOCK M8 -5/16 8 045771 4 NU T HEX M8-1 .25 G8 YEL CHR 9 07 1956 4 WASHE R FL AT M8 10 05173 0 4 ...
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Siemens SG020 - page 40
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Siemens SG020 - page 41
1 0G02 07 REF ENGINE GENE RA C 1.6L NG 2 0G083 4 1 ENGI NE PLAT E 1. 6L 3 0G08 20 REF HOUS ING BLOW ER M ACHINE D 1.6L 4 0E9747 1 S TART E R 12 VOLT 5 0G08 39 2 ENGINE M OUNTING FOOT S TAMPING 6 0G07 81 1 EXHAUS T MANIFOLD 1.6L MACHINE D 7 0G07 22 1 I NTAKE M ANIFOLD MA CHINED 1.6L 8 0G07 58 1 HEAT S HIEL D L O W ER 1.6L 9 0G04 31 1 HE AT SHIELD UP ...
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Siemens SG020 - page 42
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Siemens SG020 - page 43
1 098290 1 ASM MOTOR ST EPPER 2 09894 1A 1 HOUSING GOVE RNOR CONNECTOR 3 09895 8A REF CO NNECT OR INT ERFACE ASSE M BLY 4 09894 2A 1 COVE R CO NNECT O R HO USI NG 5 098225 2 SCREW FHM # 2 X 5/8 SELF TAP 6 04 3146 3 SCREW HHC M 6-1. 0 X 1 0 G8.8 7 02 2097 5 WASHE R LOCK M6- 1/4 8 084543A 1 SCRE W PHM M3-0.5 X 12MM 9 098783 1 LEVER STEPPER MOTOR 10 0 ...
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Siemens SG020 - page 44
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Siemens SG020 - page 45
1 026812 2 ELBOW 90 D 3 /4 NPT 2 075580 1 FLANGE FUEL INLET 3 0G1397 1 FUEL REGULAT OR 1. 6L REWO RK 4 03925 3 2 SCREW HHC M 8-1.25 X 20 G8.8 5 022145 2 WASHER FLA T 5/1 6 ZINC 6 022129 4 WASHER LOCK M8 -5/16 7 045771 2 NUT HEX M8-1.25 G8 YEL CHR (1) 8 0F1570 1 BODY CARBURETOR ASSEMBLY 9 0A6344 1 BARBED EL 90 1/8NPT X 3/8 10 0C5 210 1 HOSE 3/8 ID L ...
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Siemens SG020 - page 46
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Siemens SG020 - page 47
1 0F 7003 ( XX) 1 ROOF C1 CPL 2 0 F7 00 4 ( XX) 1 CORNER POST LH SI DE C1 CP L 3 0F7 00 8 ( XX ) 1 DOO R REAR C1 CPL 4 0 F7 00 5 ( XX) 1 CORNER POST RH S IDE C1 CP L 5 0F7 00 7 ( XX ) 2 DOO R LH & RH SI DE C1 CPL 6 0F 700 6 ( XX ) 1 DU CT F RONT DIS CHARGE C 1 CPL 7 0 F44 87 A 1 AS SEMBL Y, COVE R ACCE SS 8 0 912 97 009 1 1 ASSY WI RE 14A WG 13 ...
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Siemens SG020 - page 48
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Siemens SG020 - page 49
1 0F7366 1 MUFFLER C1 2 0F7647 1 MUFFLER SADDLE 3 0F 8095 1 PIPE EXHAU ST OUT LET 4 0F7538 1 PIPE EXH INLET M UFLR SIDE 1.5L 5 0E3257 4 SCRE W HW HTF M6- 1.0 X 1 6 6 0F7644 2 MUFFLER STRAP 7 0C 61 1 9 1 BO LT U 5/16-1 8 X 2-1 /4 8 03 64 3 4 3 BOLT U 5/16- 18 X 2. 09 9 036449 3 SAD DLE 2 INCH 10 02212 9 8 WASHER LOCK M8-5/ 16 11 0222 5 9 6 NUT HEX 5 ...
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Siemens SG020 - page 64
Standby Generator Sets W arranty Printed in U.S.A. GENERA C PO WER SYSTEMS ST ANDARD LIMITED W ARRANTY FOR HOME ST ANDBY/LIGHT COMMERCIAL PRODUCT 45kW AND BELO W For a period of two (2) y ears from the date of sale, or start-up by A uthorized/Cer tified Generac P ower Systems Dealer , or branch thereof , Generac P ow er Systems, Inc. will, at its o ...
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