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Section 4 — Maintenance

Air-cooled Generators

4.12  SERVICE SCHEDULE

ATTENTION:  It is recommended that all service work 

be performed by the nearest Dealer.

SYSTEM/COMPONENT

PROCEDURE

FREQUENCY

X = Action

R = Replace as Necessary

*  =  Notify Dealer if Repair is 

Needed.

Inspect

Change

Clean

W = Weekly

M = Monthly

Y = Yearly

 FUEL

 Fuel lines and connections*

X

M

 LUBRICATION

 Oil level

X

M or 24 hours of 

continuous operation.

 Oil

X

2Y or 200 hours

of operation.**

 Oil filter

X

2Y or 200 hours

of operation.**

 COOLING

 Enclosure louvers

X

X

W

 BATTERY

 Remove corrosion, ensure
 dryness

X

X

M

 Clean and tighten battery
 terminals

X

X

M

 Check charge state

X

R

EVERY 6 M

 Electrolyte level

X

R

EVERY 6 M

 ENGINE AND MOUNTING 

 Air cleaner

X

R

2Y or 200 hours

 Spark plug(s)

X

R

2Y or 200 hours

 GENERAL CONDITION

 Vibration, Noise, Leakage, 
Temperature*

X

M

 COMPLETE TUNE-UP*

TO BE COMPLETED BY A DEALER

2Y or 200 hours

*  Contact the nearest dealer for assistance if necessary.

**  Change oil and fi lter after fi rst eight (8) hours of operation and then every 200 hours thereafter, or 2 years, which-

ever occurs fi rst. Change sooner when operating under a heavy load or in a dusty or dirty environment or in high 
ambient temperatures.

Summary of Contents for 10

Page 1: ... 17 20kW Air cooled Automatic Standby Generators DANGER DEADLY EXHAUST FUMES OUTDOOR INSTALLATION ONLY Not intended for use as Primary Power in place of utility or in life support applications LISTED C US DO NOT LIFT UNIT BY ROOF ...

Page 2: ...bol points out important safety infor mation that if not followed could endanger personal safety and or property of others This symbol points out potential explosion haz ard 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 The manufacturer strongly recom mends that the operator...

Page 3: ...eck Transfer Switch Operation 13 2 3 Electrical Checks 13 2 4 Generator Tests Under Load 14 2 5 Checking Automatic Operation 14 2 6 Engine Governor Adjustment 15 2 7 Voltage Regulator Adjustment 15 Section 3 Operation 16 3 1 Control Panel Interface 16 3 2 Automatic Transfer Operation 17 3 3 Sequence of Automatic Operation 18 3 4 Manual Transfer Operation 19 3 5 Side Compartment V twin Only 20 3 6 ...

Page 4: ...stem or do anything that might render the system unsafe or in noncompli ance 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 venti lating air is critical to correct generator operation Do not alter the installation ...

Page 5: ...nerator is installed in accordance with the manufacturer s instructions and recommendations Following proper installa tion do nothing that might alter a safe installation and render the unit in noncompliance with the aforementioned codes standards laws and regu lations Keep a fire extinguisher near the generator at all times Extinguishers rated ABC by the National Fire Protection Association are a...

Page 6: ...ear stuck Always verify that the side lock is unlocked before attempting to lift the roof 1 2 PROTECTION SYSTEMS Unlike an automobile engine the generator may have to run for long periods of time with no operator pres ent to monitor engine conditions For that reason the engine is equipped with the following systems that protect it against potentially damaging condi tions 1 Low Oil Pressure Sensor ...

Page 7: ...r use as a stationary engine for standby power generation Any other use may be a violation of federal and or local laws It is important that to follow the maintenance specifica tions in the Maintenance section to ensure that the engine complies with the applicable emission stan dards for the duration of the engine s life This engine is certified to operate on Liquid Propane fuel and pipeline Natur...

Page 8: ...te Base Oil Filter Battery Compartment Fuel Regulator Fuel Inlet back Air Filter Circuit Breakers GFCI Outlet All 17 20kW Control Panel Figure 1 3 12 14 16 17 and 20kW V twin GT 990 GT 999 Engine door removed Figure 1 1 8kW Single Cylinder GH 410 Engine door removed Data Label see sample Oil Dipstick Exhaust Enclosure Composite Base Oil Filter Battery Compartment Fuel Regulator Fuel Inlet back Air...

Page 9: ...s as fuel Btu content ambient temperature altitude engine power and condition etc Maximum power decreases about 3 5 percent for each 1 000 feet above sea level and also will decrease about 1 percent for each 6 C 10 F above 16 C 60 F ambient temperature Load current values shown for 120 volts are maximum TOTAL values for two separate circuits The maximum current in each circuit must not exceed the ...

Page 10: ...pplications Once the generator is installed verify that the fuel pressure NEVER drops below four 4 inches water column for natural gas or 10 inches water column for liq uid propane Prior to installation of the generator the installer should consult local fuel suppliers or the fire mar shal to check codes and regulations for proper instal lation Local codes will mandate correct routing of gaseous f...

Page 11: ...ned with the LP Liquid Propane position 6 Save this tool with the Owner s Manual 7 Install the battery door and close the roof 8 Reverse the procedure to convert back to natural gas Figure 1 4 Fuel Selector NOTE Use an approved pipe sealant or joint compound on all threaded fittings to reduce the possibility of leakage 1 10 2 10 12 14 16 17 AND 20KW V TWIN ENGINES To reconfigure the fuel system fr...

Page 12: ...levels will not rise and endanger it Allow sufficient room on all sides of the generator for maintenance and servicing This unit must be installed in accordance with current applicable NFPA 37 and NFPA 70 standards as well as any other federal state and local codes for minimum distances from other structures DO NOT install under wooden decks or structures unless there is at least four 4 feet of cl...

Page 13: ...losure The transfer switch that may have shipped with the 20kW generator is enclosed in a NEMA 3R indoor outdoor rated enclosure Install the transfer switch indoors on a firm sturdy supporting structure To prevent switch distortion level the switch if necessary This can be done by placing washers between the switch enclosure and mounting sur face Never install the switch where water or any corro s...

Page 14: ...se flame or spark in battery area and Discharge static electricity from body before touch ing the battery by first touching a grounded metal surface Be sure the AUTO OFF MANUAL switch is set to the OFF position before connecting the battery cables If the switch is set to AUTO or MANUAL the generator can crank and start as soon as the battery cables are connected Be sure the utility power supply is...

Page 15: ...1 Set the generator s main circuit breaker to its OFF or OPEN position 2 Set the generator s AUTO OFF MANUAL switch to the OFF position 3 Turn OFF all breakers on the load center of the transfer box T1 and T2 4 Turn on the utility power supply to the transfer switch using the means provided such as a utility main line circuit breaker DANGER The transfer switch is now electrically hot Contact with ...

Page 16: ...han 230 volts and frequency should be greater than 58 Hz 10 12 14 16 17 and 20kW voltage should be greater than 240 volts and frequency should be 60 Hz 11 Let the generator run at full rated load for 20 30 minutes Listen for unusual noises vibration or other indications of abnormal operation Check for oil leaks evidence of overheating etc 12 When testing under load is complete turn OFF electrical ...

Page 17: ...UNITS NOTE All V twin units DO NOT require an engine gover nor adjustment due to their design 2 6 3 ADDITIONAL CORROSION PROTECTION Periodically spray all engine linkage parts and brack ets with corrosion inhibiting spray such as WD 40 or a comparable product 2 7 VOLTAGE REGULATOR ADJUSTMENT 2 7 1 8 10KW UNITS Due to the brushless design of these two alternators no voltage regulator is used and th...

Page 18: ...g on the genera tor panel and on the transfer switch Figure 3 2 10 12 14 16 17 20kW Generator Control Panel ENTER ECS 3 1 2 SETTING THE EXERCISE TIMER This generator is equipped with an exercise timer Once it is set the generator will start and exercise every seven days on the day of the week and at the time of day specified During this exercise period the unit runs for approximately 12 minutes an...

Page 19: ...Systems section for details 10 to 20KW DISPLAY INTERFACE MENUS The LCD display is organized as detailed below The Home page this page is the default page which will be displayed if no keys are pressed for 30 seconds This page normally shows the current Status message and the current date and time The highest priority active Alarm and or Warning will be automatically posted on this page as well as ...

Page 20: ...into a rest cycle for seven 7 seconds then continue the rest of the crank cycle During a rest cycle the start and fuel outputs are de energized and the magneto output is shorted to ground Cranking Conditions The following notes apply during cranking cycle 1 Starter motor will not engage within five 5 sec onds of the engine shutting down 2 The fuel output will not be energized with the starter 3 Th...

Page 21: ...the generator and activate the transfer switch manually proceed as follows 1 Set the generator s AUTO OFF MANUAL switch to OFF 2 Set the generator s main circuit breaker to its OFF or OPEN position 3 Turn OFF the utility power supply to the transfer switch using the means provided such as a utility main line circuit breaker DANGER Do not attempt to activate the transfer switch manually until all p...

Page 22: ...ction 3 5 3 120 VAC GFCI OUTLET 15 AMP BREAKER 17 20 KW ONLY These models are equipped with an external 15 amp 120 volt GFCI convenience outlet that is located in a compartment on the right side of generator Figure 1 3 When the generator is running in the absence of util ity power this outlet may also be used to power items outside your home such as lights or power tools This outlet may also be us...

Page 23: ...crank the engine If no RPM signal is detected within the first three 3 seconds of cranking the Control Board will shut the engine down and latch out on RPM sensor loss If the RPM signal is detected the engine will start and run nor mally If the RPM signal is subsequently lost again the Control Board will try one more re crank attempt before latching out and displaying the RPM sensor failure messag...

Page 24: ...se is wired in series with the battery out put lead to the panel If this fuse element has melted open the engine will not be able to crank or start Replace this fuse using only an identical 7 5 amp replacement fuse Whenever the fuse is removed or replaced the exercise timer needs to be reset 4 2 CHECKING THE ENGINE OIL LEVEL For oil capacities see the Specifications section For engine oil recommen...

Page 25: ...wise 2 Apply a light coating of clean engine oil to the gas ket of the new filter See the Specifications section for recommended filter 3 Screw the new filter on by hand until its gasket lightly contacts the oil filter adapter Then tighten the filter an additional 3 4 to one turn Figure 4 4 4 Refill with the proper recommended oil see the Engine Oil Recommendations section See the Specifications s...

Page 26: ... out the old air filter and discard appropri ately 4 Install the new filter open end first into the air box 5 Swing the yellow door shut and snap to close 6 Replace door and close roof securely Figure 4 7 8kW Engine Air Cleaner Location Air Cleaner Cover 4 5 SPARK PLUG S Reset the spark plug s gap or replace the spark plug s as necessary See the Service Schedule section for maintenance requirement...

Page 27: ... Spilled electrolyte is to be washed down with an acid neutralizing agent A common practice is to use a solution of 1 pound 500 grams bicarbonate of soda to 1 gallon 4 liters of water The bicar bonate of soda solution is to be added until the evidence of reaction foaming has ceased The resulting liquid is to be flushed with water and the area dried Lead acid batteries present a risk of fire becaus...

Page 28: ...OTE Start all four screws before tightening or it will not be possible to get all the screws in place Make sure the valve cover gasket is in place Install spark plugs Re attach the spark plug wire to the spark plug On the GT 530 and GT 990 999 repeat the process for the other cylinder 4 8 COOLING SYSTEM Air inlet and outlet openings in the generator com partment must be open and unobstructed for c...

Page 29: ...IN THE BATTERY Recharge the battery to 100 percent state of charge or if defective replace the battery See Specifications for type and size 4 Clean and wipe the entire generator 5 Make sure the 7 5A fuse is removed from the generator control panel Reconnect the battery Observe battery polarity Damage may occur if the battery is connected incorrectly 6 Open the fuel shutoff valve 7 Insert the 7 5A ...

Page 30: ...ING Enclosure louvers X X W BATTERY Remove corrosion ensure dryness X X M Clean and tighten battery terminals X X M Check charge state X R EVERY 6 M Electrolyte level X R EVERY 6 M ENGINE AND MOUNTING Air cleaner X R 2Y or 200 hours Spark plug s X R 2Y or 200 hours GENERAL CONDITION Vibration Noise Leakage Temperature X M COMPLETE TUNE UP TO BE COMPLETED BY A DEALER 2Y or 200 hours Contact the nea...

Page 31: ...el pressure incorrect 3 Confirm fuel pressure to regulator is 10 12 water column 0 36 0 43 psi for LP and 5 7 water column 0 18 0 25 psi for natural gas 4 Fuel selector in wrong position 4 Move selector to correct position 5 Choke remains closed 5 Verify choke plate moves freely The AUTO OFF MANUAL 1 Defective switch 1 switch is set to OFF but 2 AUTO OFF MANUAL switch 2 the engine continues wired ...

Page 32: ... to select the the desired screen refer to the Menu System diagram 6 1 1 CHANGING SETTINGS EDIT MENU To change a setting such as display contrast go to the EDIT menu and use the keys to navigate to the setting to change Once this setting is displayed e g Contrast press the ENTER key to go into the edit mode Use the keys to change the setting press the ENTER key to store the new setting NOTE If the...

Page 33: ... or Other 60 Hz The possible Status messages of the display are as follows Switched Off Time Date Ready to Run Time Date Utility Loss Delay Pausing for X Seconds Cranking Attempt X Running in Exercise Time Date Running Cooling Down Running Warning Warning Message Running Alarm Alarm Message Stopped Alarm Alarm Message Stopped Warning Warning Message Cranking Pausing for X Seconds Running Time Date...

Page 34: ...32 32 Section 7 Notes Air cooled Generators ...

Page 35: ...33 Section 8 Installation Diagrams Air cooled Generators Circuit Breakers Drawing No 0G8573 A ...

Page 36: ...34 Section 8 Installation Diagrams Air cooled Generators Generator Drawing No 0G8280 D ...

Page 37: ...35 Section 8 Installation Diagrams Air cooled Generators Generator Drawing No 0G8280 D ...

Page 38: ...se neglect improper maintenance or unap proved modifications or the use of counterfeit and or grey market parts not made supplied or approved by Generac You are responsible for contacting a Generac Authorized Warranty Service Facility as soon as a problem occurs The warranty repairs should be completed in a reasonable amount of time not to exceed 30 days Warranty service can be arranged by contact...

Page 39: ...section 4 below Any such emissions related part repaired or replaced under the ECS Warranty shall be warranted for the remainder of the ECS Warranty Period prior to the first scheduled replacement point for such emissions related part 4 Repair or replacement of any warranted emissions related part under this ECS Warranty shall be performed at no charge to the owner at a Generac Authorized Warranty...

Page 40: ...Part No 0G8334 Revision D 09 16 08 Printed in U S A Catalog No OMASPCA S 01 ...

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