Rheem RESIDENTIAL GENERATOR SYSTEM GEN12S- User Manual

Page 2 - The installer should follow the instructions; Where to Find Us; Rheem Sales Company

Thank you for purchasing this quality-built Rheem / Ruud home standby generator. We are pleased that you’ve placed your confidence in the Rheem or Ruud brand. When operated and maintained according to the instructions in this manual, yourRheem / Ruud generator will provide many years of dependable s...

Page 3 - Table of Contents

1 Français Español Table of Contents Important Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Equipment Description. . . . . . . . . . . . . . . . . . . ...

Page 4 - WARNING

2 Important Safety Rules The safety alert symbol ( ) is used with a signal word (DANGER, CAUTION, WARNING), a pictorial and/or a safetymessage to alert you to hazards. DANGER indicates a hazard which, if not avoided, will result in death or serious injury. WARNING indicates a hazard which, if not av...

Page 5 - Generator produces hazardous voltage.

3 • When using generator for backup power, notify utility company. • Do not touch bare wires or receptacles. • Do not use generator with electrical cords which are worn, frayed, bare or otherwise damaged. • Do not handle generator or electrical cords while standing in water, while barefoot, or while...

Page 7 - Installation; IMPORTANT: DO NOT OVERLOAD GENERATOR. Refer to; Essential Circuits; in the Operator’s Manual and discuss; CAUTION

5 Installation Equipment Description This system is intended for use as an optional residentialgenerator system which provides an alternate source ofelectric power and to serve loads such as heating,refrigeration systems, and communication systems that,when stopped during any power outage, could cau...

Page 8 - Generator Location; General Location Guidelines; Fuel and Electrical Inlet Dimensions; Figure 1 — Generator Location

6 Generator Location Before installing generator, consult with homeowner andconvey the following guidelines which may affect the desiredlocation. Install generator outdoors in an area which will notaccumulate deadly exhaust gas. DO NOT install generatorwhere exhaust gas could accumulate and enter in...

Page 9 - Lifting the Generator; Hazardous Voltage

Lifting the Generator The generator weighs more than 560 pounds. Proper tools,equipment and qualified personnel should be used in allphases of handling and moving the generator. Two 48” lengths of 1” pipe (supplied by the installer) arerequired to lift the generator manually. Insert pipes throughthe...

Page 10 - Figure 4 — Enclosure Access Doors

8 Access Doors The generator system is equipped with an enclosure that hasthree access doors (Figure 4). The doors are named for asignificant component located behind them. Starting with theside that has the fuel connection and proceeding clockwise,the doors are named: • Oil Fill door • Control Pane...

Page 12 - Figure 9 —; NPT; Figure 8 —

Fuel Consumption See Figure 7 for estimated fuel supply requirements at halfand full load for both natural gas and LP vapor. Fuel Pipe Sizing Figures 8 and 9 provide the maximum capacity of pipe incubic feet of gas per hour for gas pressures of 0.5 psi orless and a pressure drop of 0.3 in. water col...

Page 13 - Fuel Comparison Chart; Withdrawal Rate; Physical Properties

11 Fuel Comparison Chart The fuel comparison chart shown below is provided for yourreference. Size of Propane Tank Required at VariousTemperatures When Kept at Least Half Full Given the gas withdrawal rate and the lowest average wintertemperature, an installer can specify the required LP storagetank...

Page 14 - System Connections; Wiring for the 10 Pole Connector:

12 System Connections Compare this illustration with your generator to familiarize yourself with the location of these important connections: Wiring for the 10 Pole Connector: • Fault Contacts — Use NO, COM and NC to hook up a siren, light, etc. to alert for a fault. Contacts reversestate upon a fau...

Page 15 - System AC Connections; NOTE; Grounding the Generator; To install the remote LED panel:; Fault Detection System

13 System AC Connections A single-phase, three-wire AC connection system is used inthe generator system. The stator assembly consists of a pairof stationary windings with two leads brought out of eachwinding. The junction of leads 22 and 33 forms the neutrallead, as shown schematically and as wiring...

Page 16 - NOTICE; NOTICE; Figure 11 — Generator System Control Panel

14 System Control Panel Figure 11 depicts the generator system control panel, locatedinside the generator housing. Below are brief descriptions ofthe controls used during installation. More information maybe found in the Operator’s Manual. System Switch This two-position switch is the most important...

Page 17 - Fuel System Selection; Figure 12 — Fuel Select Solenoid Connection

15 NOTE : With the battery installed and utility power available to the Automatic Transfer Switch, the battery receives a tricklecharge whenever the engine is not running. This processmay take up to 72 hours to fully charge a battery from 5Volts. The trickle charge cannot be used to recharge abatter...

Page 19 - Engine Adjustment; ON; Installation Inspection

17 Engine Adjustment There are regional variances in the composition of naturalgas. Each generator system is adjusted at the factory for NGoperation. If the generator output voltage or frequencymeasured during Initial Start-Up (paragraph #9, earlier) is outside the listed ranges, the combustibility ...

Page 20 - Setting Exercise Timer

18 Controls All generator system controls are fully described in theOperator’s Manual. Please refer there for full information. Operation The primary source of generator system operatinginstructions is the Operator’s Manual. Please refer to theOperator’s Manual for detailed information. The followin...

Page 21 - Notes

Page 22 - Schematic and Wiring Diagram for Models GEN12S and GEN20B

20 Schematic and Wiring Diagram for Models GEN12S and GEN20B

Page 23 - Schematic and Wiring Diagram for Models GEN15S and GEN25B

21 Schematic and Wiring Diagram for Models GEN15S and GEN25B