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24D-342 Residential 48RCL 48KWStandard Features Model:48RCL Multi-Fuel LP Vapor/Natural Gas Kohler Co. provides one-source responsibility for the generating system and accessories. The generator set and its components are prototype-tested, factory-built, and production-tested. The generator set accepts rated load in one step. A standard five-year limited warranty covers all systems and components. Quick-ship (QS) models with selected features are available. See your Kohler distributor for details. RDC2 Controller One digital controller manages both the generator set and transfer switch functions (with optional Model RXT transfer switch). Designed for today’s most sophisticated electronics. Electronic speed control responds quickly to varying household demand. Digital voltage regulation protects your valuable electronics from harmonic distortion and unstable power quality. Two-line, backlit LCD screen is easy to read in all lighting conditions, including direct sunlight and low light. Engine Features Powerful and reliable GM 5.0 L liquid-cooled engine Closed-loop fuel control for long-lasting, clean emissions Simple field conversion between natural gas and LP vapor fuels while maintaining emission certification Innovative Cooling System Electronically controlled fan speeds minimize generator set sound signature Certifications The 60 Hz generator set engine is certified by the Environmental Protection Agency (EPA) to conform to the New Source Performance Standard (NSPS) for stationary spark-ignited emissions UL 2200 listing is available (60 Hz only) CSA certification is available (60 Hz only) Approved for stationary standby applications in locations served by a reliable utility source The Kohler Advantage High Quality Power Kohler home generators provide advanced voltage and frequency regulation along with ultra-low levels of harmonic distortion for excellent generator power quality to protect your valuable electronics. Extraordinary Reliability Kohler is known for extraordinary reliability and performance and backs that up with an industry-leading 5-year or 2000 hour warranty. All-Aluminum Sound Enclosure Fast Response Kohler’s Fast-Response X excitation system delivers excellent voltage response and short-circuit capability using a rare-earth permanent magnet (PM)-excited alternator. Quiet Operation Kohler home generators provide quiet, neighborhood- friendly performance. G4-211 (48RCL) 2/13c Generator Set Ratings Natural Gas LP Gas 130 C Rise 130 CRise Standby Rating Standby Rating Alternator Voltage Ph Hz kW/kVA Amps kW/kVA Amps 4P7BX 120/208 3 60 48/60 167 50/63 173 120/240 3 60 46/58 138 48/60 144 277/480 3 60 48/60 72 50/63 75 220/380*3 50 38/48 72 39/49 74 230/400 3 50 38/48 69 40/50 72 240/416* 3 50 38/48 66 40/50 69 4Q7BX 120/240 1 60 48/48 200 48/48 200 * 50 Hz models are factory-connected as 230/400 volts. Field-adjustable to 220/380 or 240/416 volts by an authorized service technician. RATINGS: All three-phase units are rated at 0.8 power factor. All single-phase units are rated at 1.0 power factor.Standby Ratings:Standby ratings apply to installations served by a reliable utility source. Thestandbyratingisapplicabletovaryingloadswithanaverageloadfactorof80%forthedurationofapoweroutage. Nooverloadcapacityisspecifiedforthisrating. RatingsareinaccordancewithISO-3046/1, BS 5514, AS 2789, and DIN 6271. GENERAL GUIDELINES FOR DERATING:Altitude:Derate 1.3% per 100 m (328 ft.) elevation above 200 m (656 ft.).Temperature:Derate 3.0% per 10 C(18F) temperatureabove25 C(77 F). Availabilityissubjecttochangewithoutnotice. Thegeneratorsetmanufacturerreservestherighttochangethedesignorspecificationswithoutnoticeandwithoutanyobligation or liability whatsoever. Contact your local Kohler generator distributor for availability. G4-211 (48RCL) 2/13c Alternator Specifications Specifications Alternator Manufacturer Kohler Exciter type Brushless, Rare-Earth Permanent Magnet Leads: quantity, type 4Q7BX 4, 120/240 4P7BX 12, Reconnectable Voltage regulator Solid State, Volts/Hz Insulation: NEMA MG1 Material Class H Temperature rise 130 C, Standby Bearing: quantity, type 1, Sealed Coupling Flexible Disc Amortisseur windings Full Voltage regulation, no-load to full-load ±1.0% RMS Unbalanced load capability 100% of Rated Standby Current One-step load acceptance 100% of Rating Peak motor starting kVA: (35% dip for voltages below) 480 V, 400 V 4P7BX (12 lead) 180 (60 Hz), 136 (50 Hz) 240 V 4Q7BX (4 lead) 113 (60 Hz) The unique Fast-Response X excitation system delivers excellent voltage response and short-circuit capability using a rare-earth, permanent magnet (PM)-excited alternator. Brushless, rotating-field alternator with broadrange reconnectability. NEMA MG1, IEEE, and ANSI standards compliance for temperature rise and motor starting. Sustained short-circuit current of up to 300% of the rated current for up to 10 seconds. Sustained short-circuit current enabling downstream circuit breakers to trip without collapsing the alternator field. Self-ventilated and dripproof construction. Vacuum-impregnated windings with fungus-resistant epoxy varnish for dependability and long life. Superior voltage waveform from a two-thirds pitch stator and skewed rotor. Total harmonic distortion (THD) from no load to full load with a linear load is less than 4%. Application Data Engine Engine Specifications 60 Hz 50 Hz Manufacturer General Motors Engine: model, type Industrial Powertrain Vortec 5.0 L, 4-Cycle Natural Aspiration Cylinder arrangement V-8 Displacement, L (cu. in.) 5.0 (305) Bore and stroke, mm (in.) 94.9 x 88.4 (3.74 x 3.48) Compression ratio 9.4:1 Main bearings: quantity, type 5, M400 Copper Lead Rated rpm 1800 1500 Max. power at rated rpm, kW (HP) 66.4 (89) 54.5 (73) Piston speed,m/min. (ft./min.)318 (1044)265 (870) Cylinder head material Cast Iron Piston type and material High Silicon Aluminum Crankshaft material Nodular Iron Valve (exhaust) material Forged Steel Governor type Electronic Frequency regulation, no-load to full-load Isochronous Frequency regulation, steady state ±1.0% Frequency Fixed Air cleaner type Dry Exhaust Exhaust System 60 Hz 50 Hz Exhaust manifold type Dry Exhaust flow at rated kW, m 3/min. (cfm) 13.3 (468) 10.6 (375) Exhaust temperature at rated kW, dry exhaust,C(F)716 (1320) Maximum allowable back pressure, kPa (in. Hg)10.2 (3.0) Exhaust outlet size at engine hookup, mm (in.)63 (2.5) OD Engine Electrical Engine Electrical System Ignition system Electronic Battery charging alternator: Ground (negative/positive) Negative Volts (DC) 12 Ampere rating 70 Starter motor rated voltage (DC) 12 Battery, recommended cold cranking amps (CCA): Qty., rating for --18 C(0°F)One, 630 Battery voltage (DC) 12 Battery group size 24 Fuel Fuel System Fuel type LP Gas or Natural Gas Fuel supply line inlet 1 in. NPT Natural gas fuel supply pressure, kPa (in. H2O)1.74--2.74 (7-11) LPG vapor withdrawal fuel supply pressure, kPa (in. H2O)1.24--2.74 (5-11) Fuel Composition Limits *Nat. Gas LP Gas Methane, % by volume 90 min.— Ethane, % by volume 4.0 max. — Propane, % by volume 1.0 max. 85 min. Propene, % by volume 0.1 max. 5.0 max. C4 and higher, % by volume 0.3 max. 2.5 max. Sulfur, ppm mass 25 max. Lower heating value, MJ/m3 (Btu/ft3), min.33.2 (890) 84.2 (2260) * Fuels with other compositions may be acceptable. If your fuel is outside the listed specifications, contact your local distributor for further analysis and advice. G4-211 (48RCL) 2/13c Application Data Lubrication Lubricating System Type Full Pressure Oil pan capacity, L (qt.) 4.3 (4.5) Oil pan capacity with filter, L (qt.) 4.7 (5.0) Oil filter: quantity, type 1, Cartridge Cooling Radiator System 60 Hz 50 Hz Ambient temperature,C(F)45 (113) Radiator system capacity, including engine, L (gal.)17 (4.5) Engine jacket water flow, Lpm (gpm) 117.3 (31) 98.4 (26) Heat rejected to cooling water at rated kW, dry exhaust, kW (Btu/min.)48.4 (2750) 42.9 (2440) Water pump type Centrifugal Fan diameter, mm (in.) qty. 3 @ 406 (16) Fan power requirements (powered by engine battery charging alternator)12VDC, 18 amps each Operation Requirements Air Requirements 60 Hz 50 Hz Radiator-cooled cooling air, m3/min. (scfm)51 (1800)51 (1800) Combustion air, m 3/min. (cfm) 4.5 (159) 3.7 (132) Air over engine, m 3/min. (cfm) 25 (900) 25 (900) Air density = 1.20 kg/m 3 (0.075 lbm/ft 3) Fuel Consumption Natural Gas, m 3/hr. (cfh) at % load 60 Hz 50 Hz 100%19.8 (699)15.8 (559) 75% 16.9 (598) 13.5 (478) 50% 13.0 (461) 10.4 (368) 25% 9.1 (321) 7.3 (257) Exercise 4.2 (147) 4.2 (147) LP Gas, m 3/hr. (cfh) at % load 60 Hz 50 Hz 100%8.0 (283)6.4 (226) 75% 6.7 (235) 5.3 (188) 50% 5.0 (175) 4.0 (140) 25% 3.4 (121) 2.7 (97) Exercise 1.5 (54) 1.5 (54) Nominal Fuel Rating: Natural gas, 37 MJ/m 3 (1000 Btu/ft 3) LP Vapor, 93 MJ/m 3 (2500 Btu/ft 3) LP vapor conversion factors: 8.58 ft. 3 =1lb. 0.535 m 3 =1kg. 36.39 ft. 3 = 1 gal. Sound Enclosure Features Sound-attenuating enclosure uses acoustic insulation that meets UL 94 HF1 flammability classification and repels moisture absorption. Internally mounted critical silencer. Skid-mounted, aluminum construction with two removable access panels. Fade-, scratch-, and corrosion-resistant Kohler cashmere powder-baked finish. Sound Data Model 48RCL sound level is 58 dBA during weekly engine exercise and 61 dBA during full-speed generator diagnostics and normal operation. All sound levels are measured at 7 meters with no load. RDC2 Controller Voltage: 240 V Freq: 60.0 Hz The RDC2 controller provides integrated control for the generator set, Kohler Model RXT transfer switch, programmable interface module (PIM), and load control module (LCM). The RDC2 controller’s 2-line LCD screen displays status messages and system settings that are clear and easy to read, even in direct sunlight or low light. RDC2 Controller Features Membrane keypad: OFF, AUTO, and RUN pushbuttons Select and arrow buttons for access to system configuration and adjustment menus LED indicators for OFF, AUTO, and RUN modes LED indicators for utility power and generator set source availability and ATS position (Model RXT transfer switch required) LCD screen: Two lines x 16 characters per line Backlit display with adjustable contrast for excellent visibility in all lighting conditions Scrolling system status display Generator set status Voltage and frequency Engine temperature Oil pressure Battery voltage Engine runtime hours Date and time displays Smart engine cooldown senses engine temperature Digital isochronous governor to maintain steady-state speed at all loads Digital voltage regulation:±1.0% RMS no-load to full-load Automatic start with programmed cranking cycle Programmable exerciser can be set to start automatically on any any future day and time, and to run every week or every two weeks Exercise modes Unloaded exercise with complete system diagnostics Unloaded full-speed exercise Loaded full-speed exercise (Model RXT ATS required) Front-access mini USB connector for SiteTech connection Integral Ethernet connector for Kohler OnCue Built-in 2.5 amp battery charger Remote two-wire start/stop capability for optional connection of Model RDT or RSB transfer switches See additional controller features on the next page. Overall Size, L x W x H, mm (in.): 2286 x 851 x 1146 (90 x 33.5 x 45.1) Shipping Weight, wet, kg (lb.): 862 (1900) Weight includes generator set with engine fluids and largest alternator option, sound enclosure, and silencer. ©2011, 2012, 2013 by Kohler Co. All rights reserved. DISTRIBUTED BY: Dimensions and Weights NOTE: This drawing is provided for reference only and should not be used for planning installation. Contact your local distributor for more detailed information. H WL G4-211 (48RCL) 2/13c Additional RDC2 Controller Features Diagnostic messages Displays diagnostic messages for the engine, generator, Model RXT transfer switch, programmable interface module (PIM), and load control module (LCM) Over 70 diagnostic messages can be displayed Maintenance reminders System settings System voltage, frequency, and phase Voltage adjustment Measurement system, English or metric ATS status (Model RXT ATS required) Source availability ATS position (normal/utility or emergency/generator) Source voltage and frequency ATS control (Model RXT ATS required) Source voltage and frequency settings Engine start time delay Transfer time delays Fixed pickup and dropout settings Voltage calibration Programmable Interface Module (PIM) status displays Input status (active/inactive) Output status (active/inactive) Load Control Module (LCM) menus Load status Test function Generator Set Standard Features Aluminum sound enclosure with enclosed silencer Battery rack and cables Electronic, isochronous governor Gas fuel system (includes fuel mixer, electronic secondary gas regulator, two gas solenoid valves, and flexible fuel line between the engine and the skid-mounted fuel system components) Integral vibration isolation Oil drain extension Operation and installation literature RDC2 Controller with built-in battery charger 5-year basic warranty Available Options Approvals and Listings UL 2200 listing (60 Hz only) CSA approval Communication Accessories OnCue Generator Management System for remote monitoring (see specification sheet G6-116) Fuel System Flexible fuel line (required when the generator set skid is spring mounted) Cooling System Block heater [recommended for ambient temperatures below 0°C(32°F)] Available Options, Continued Electrical System Battery Battery heater Controller Accessories Programmable Interface Module (PIM) (provides 2 digital inputs and 6 relay outputs) Load Control Module (LCM) (provides 4 power relays and 2 HVAC relays) Transfer Switch Model RXT Automatic Transfer Switch (see G11--121) Model RDT Automatic Transfer Switch (see G11--98) Model RSB Automatic Transfer Switch (see G11--101) Miscellaneous Rated power factor testing Literature General maintenance literature kit Overhaul literature kit Production literature kit Other Options _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ Kohler Power Systems Asia Pacific Headquarters 7 Jurong Pier Road Singapore 619159 Phone (65) 6264-6422, Fax (65) 6264-6455 KOHLER CO., Kohler, Wisconsin 53044 USA Phone 920-457-4441, Fax 920-459-1646 For the nearest sales and service outlet in the US and Canada, phone 1-800-544-2444 KOHLERPower.com