Rheem GEN12S Installation Manual

Questions?Help is just a moment away!Call: Home Generator Helpline(877) 369-9400 M-F 8-5 CTManual No. 202113GS Rev. - (01/03/07)12000 / 15000 WattR

8Access DoorsThe generator system is equipped with an enclosure that hasthree access doors (Figure 4). The doors are named for asignificant component

• Install the flexible, gaseous hose (supplied) betweenthe generator system Fuel Inlet port and rigid piping toprevent thermal expansion or contractio

Fuel ConsumptionSee Figure 7 for estimated fuel supply requirements at halfand full load for both natural gas and LP vapor.Fuel Pipe SizingFigures 8 a

11Fuel Comparison ChartThe fuel comparison chart shown below is provided for yourreference.Size of Propane Tank Required at VariousTemperatures When K

12System ConnectionsCompare this illustration with your generator to familiarize yourself with the location of these important connections:Wiring for

13System AC ConnectionsA single-phase, three-wire AC connection system is used inthe generator system. The stator assembly consists of a pairof statio

14System Control PanelFigure 11 depicts the generator system control panel, locatedinside the generator housing. Below are brief descriptions ofthe co

15NOTE: With the battery installed and utility power available tothe Automatic Transfer Switch, the battery receives a tricklecharge whenever the engi

16For a 15kW Generator:4. Remove cap from LP inlet on T-valve (Figure 13).5. Remove fuel line from NG inlet.6. Place cap from LP inlet onto NG inlet.7

17Engine AdjustmentThere are regional variances in the composition of naturalgas. Each generator system is adjusted at the factory for NGoperation. If

Thank you for purchasing this quality-built Rheem / Ruud home standby generator. We are pleased that you’ve placed yourconfidence in the Rheem or Ruud

18ControlsAll generator system controls are fully described in theOperator’s Manual. Please refer there for full information.OperationThe primary sour

19Notes

20Schematic and Wiring Diagram for Models GEN12S and GEN20B

21Schematic and Wiring Diagram for Models GEN15S and GEN25B

1FrançaisEspañolTable of ContentsImportant Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Installation . . .

2Important Safety RulesThe safety alert symbol ( ) is used with a signal word(DANGER, CAUTION, WARNING), a pictorial and/or a safetymessage to alert y

3• When using generator for backup power, notify utility company.• Do not touch bare wires or receptacles.• Do not use generator with electrical cords

4• Use generator only for intended uses.• If you have questions about intended use, ask dealer or contactRheem.• Operate generator only on level surfa

5InstallationEquipment DescriptionThis system is intended for use as an optional residentialgenerator system which provides an alternate source ofelec

6Generator LocationBefore installing generator, consult with homeowner andconvey the following guidelines which may affect the desiredlocation.Install

Lifting the GeneratorThe generator weighs more than 560 pounds. Proper tools,equipment and qualified personnel should be used in allphases of handling