Kohler Power Systems 14RESA Multi-Fuel Generator
The Kohler® Advantage
- High Quality Power: Kohler home generators provide advanced voltage and frequency regulation with ultra-low harmonic distortion for excellent power quality, protecting valuable electronics.
- Extraordinary Reliability: Backed by Kohler's reputation for reliability and performance, this generator comes with a premium 5-year or 2000-hour limited warranty.
- Powerful Performance: Exclusive Powerboost™ technology offers excellent starting power, capable of starting and running a 5-ton air conditioner.
- Corrosion-Proof Enclosure: The design is completely corrosion-proof, impact-resistant even in harsh seaside environments and at low temperatures (-34° C / -30° F).
- Fast Response: Kohler generators restore power to your home quickly and reliably.
Standard Features
- RDC2 Controller: A single digital controller manages both the generator set and transfer switch functions (with optional Model RXT). It's designed for sophisticated electronics, featuring electronic speed control for varying demand and digital voltage regulation to protect sensitive electronics.
- Kohler Command PRO Engine Features: Equipped with a Kohler Command PRO® OHV engine with hydraulic valve lifters for reliable performance without routine valve adjustment. It offers powerful, air-cooled performance and simple field conversion between natural gas and LPG fuels while maintaining emission certification.
- Designed for Easy Installation: Features a polymer base that eliminates the need for a concrete mounting pad, reducing installation time and cost. Fuel and electrical connections are made through the enclosure wall. The load connection terminal block allows easy field wiring. Designed for outdoor installation only.
Certifications & Warranty
- Certifications: Meets U.S. EPA emission regulations for both natural gas and LPG. UL 2200/cUL listed (60 Hz model), CSA certification available (60 Hz model), GOST certified (Russia), and accepted by the Massachusetts Board of Registration of Plumbers and Gas Fitters.
- Warranty: Offers a premium 5-year/2000-hour limited warranty for on-grid (standby) applications and an 18-month/1000-hour limited warranty for off-grid (non-standby) applications.
Generator Ratings
The following table details the standby ratings for Natural Gas and LPG fuels across various configurations:
| Alternator | Voltage | Phase | Hz | Natural Gas | LPG | Line Circuit Breaker | Poles | ||
|---|---|---|---|---|---|---|---|---|---|
| kW/kVA | Amps | kW/kVA | Amps | Amps | |||||
| 120* | 1 | 60 | 12/12 | 100 | 13/13 | 108 | 125 | 1 | |
| 110/220 | 1 | 60 | 12/12 | 54 | 14/14 | 63 | 100 | 2 | |
| 120/240 * | 1 | 60 | 12/12 | 50 | 14/14 | 58 | 70 | 2 | |
| 2F5 | 115/230 | 1 | 50 | 10/10 | 43 | 11/11 | 47 | 70 | 2 |
| 220+ | 1 | 50 | 10/10 | 45 | 11/11 | 50 | 50 | 1 | |
| 230 | 1 | 50 | 10/10 | 43 | 11/11 | 47 | 50 | 1 | |
| 240+ | 1 | 50 | 10/10 | 41 | 11/11 | 45 | 50 | 1 | |
| 120/208 * | 3 | 60 | 12/15 | 41 | 13/16 | 45 | 50 | 3 | |
| 120/240* | 3 | 60 | 12/15 | 36 | 13/16 | 39 | 50 | 3 | |
| 220/380 | 3 | 60 | 12/15 | 22 | 13/16 | 24 | 32 | 4 | |
| 2G5 | 277/480* | 3 | 60 | 12/15 | 18 | 13/16 | 20 | 25 | 3 |
| 220/380‡ | 3 | 50 | 10/12 | 18 | 11/13 | 20 | 25 | 4 | |
| 230/400 | 3 | 50 | 10/12 | 18 | 11/13 | 19 | 25 | 4 | |
| 240/416‡ | 3 | 50 | 10/12 | 17 | 11/13 | 19 | 25 | 4 | |
* UL listed. † 50 Hz single-phase models are factory-connected as 230 volts; field-adjustable to 220 or 240 volts by an authorized service technician. ‡ 50 Hz 3-phase models are factory-connected as 230/400 volts; field-adjustable to 220/380 or 240/416 volts by an authorized service technician. Note: The line circuit breaker is automatically selected based on the generator set model and voltage configuration.
Ratings: Standby ratings apply to installations served by a reliable utility source. All three-phase units are rated at 0.8 power factor. All single-phase units are rated at 1.0 power factor. The standby rating is applicable to variable loads with an average load factor of 80% for the duration of the power outage. No overload capacity is specified at this rating. Ratings are in accordance with ISO-3046/1, BS5514, AS2789, and DIN 6271. General Guidelines for Derating: ALTITUDE: Derate 4% per 305 m (1000 ft.) elevation above 153 m (500 ft.). TEMPERATURE: Derate 2% per 5.5°C (10°F) temperature increase above 16°C (60°F).
Alternator Specifications & Features
Alternator Specifications
- Manufacturer: Kohler
- Type: 2-Pole, Rotating Field
- Leads, quantity: 2F5 (4), 2G5 (12)
- Voltage regulator: Digital
- Insulation: NEMA MG1-1.66
- Material: Class H
- Temperature rise (60 Hz): 130°C Standby
- Temperature rise (50 Hz): 150°C Standby
- Bearing: 1, Sealed
- Coupling: Direct
- Amortisseur windings: Full
- Voltage regulation, no-load to full-load RMS: ±1.0%
- One-step load acceptance: 100% of Rating
Peak Motor Starting kVA
Values indicate % dip for voltages below:
| Voltage | Model | kVA (60 Hz) | kVA (50 Hz) |
|---|---|---|---|
| 240V, 1 ph | 2F5 (4 lead) | 33 | - |
| 230 V, 1 ph | 2F5 (4 lead) | - | 26 |
| 240 or 480 V, 3 ph | 2G5 (12 lead) | 54 | - |
| 208 V or 416 V, 3 ph | 2G5 (12 lead) | - | 38 |
Alternator Features
- Compliance with NEMA, IEEE, and ANSI standards for temperature rise.
- Self-ventilated and dripproof construction.
- Windings are vacuum-impregnated with epoxy varnish for dependability and long life.
- Superior voltage waveform and minimum harmonic distortion from skewed alternator construction.
- Digital voltage regulator with ±1.0% no-load to full-load RMS regulation.
- Rotating-field alternator with static exciter for excellent load response.
- Total harmonic distortion (THD) from no load to full load with a linear load is less than 5%.
Engine & Fuel Specifications
Engine Specifications
- Manufacturer: Kohler
- Engine: model, type: CH740 4-Cycle
- Cylinder arrangement: V-2
- Displacement: 725 cm³ (44 cu. in.)
- Bore and stroke: 83 x 67 mm (3.27 x 2.64 in.)
- Compression ratio: 9:1
- Main bearings: 2, Parent Material
- Rated RPM: 3600 (60 Hz), 3000 (50 Hz)
- Max. engine power at rated rpm: 17.6 kW (23.6 HP) for LPG (60 Hz), 15.8 kW (21.2 HP) for LPG (50 Hz), 15.3 kW (20.5 HP) for Natural Gas (60 Hz), 13.8 kW (18.5 HP) for Natural Gas (50 Hz).
- Cylinder head material: Aluminum
- Valve material: Steel/Stellite®
- Piston type and material: Aluminum Alloy
- Crankshaft material: Heat Treated, Ductile Iron
- Governor: type: Electronic
- Frequency regulation, no load to full load: Isochronous
- Frequency regulation, steady state: ±0.5%
- Air cleaner type: Dry
Fuel Pipe Size Recommendations (in. NPT)
| Pipe Length, m (ft.) | Natural Gas (193,000 Btu/hr.) | LPG (203,000 Btu/hr.) |
|---|---|---|
| 8 (25) | 3/4 | 3/4 |
| 15 (50) | 1 | 3/4 |
| 30 (100) | 1 | 1 |
| 46 (150) | 1 1/4 | 1 |
| 61 (200) | 1 1/4 | 1 |
Fuel Requirements
- Fuel System: Natural Gas or LPG
- Fuel supply inlet: 1/2 NPT
- Fuel supply pressure: Natural gas: 1.2-2.7 kPa (5-11 in. H₂O); LP: 1.7-2.7 kPa (7-11 in. H₂O)
Fuel Composition Limits
| Parameter | Nat. Gas | LPG |
|---|---|---|
| Methane, % by volume (minimum) | 90 min. | — |
| Ethane, % by volume (maximum) | 4.0 max. | — |
| Propane, % by volume | 1.0 max. | 85 min. |
| Propene, % by volume (maximum) | 0.1 max. | 5.0 max. |
| C4 and higher, % by volume | 0.3 max. | 2.5 max. |
| Sulfur, ppm mass (maximum) | 25 max. | — |
| Lower heating value, MJ/m³ (Btu/ft³), (minimum) | 33.2 (890) | 84.2 (2260) |
* Contact your local distributor for suitability and rating derates based on fuel compositions outside these limits.
Engine Electrical
- Ignition system: Electronic, Capacitive Discharge
- Starter motor rated voltage (DC): 12 Volts
- Battery (purchased separately): Ground: Negative, Volts (DC): 12, Battery quantity: 1, Recommended cold cranking amps (CCA) rating for -18°C (0°F): 500, Group size: 51
Exhaust & Lubrication
- Exhaust temperature exiting the enclosure at rated kW, dry: 260°C (500°F)
- Lubricating System Type: Full Pressure
- Oil capacity (with filter): 1.8 L (1.9 qt.)
- Oil filter: 1, Cartridge
- Oil cooler: Integral
Operation Requirements & Fuel Consumption
Fuel Consumption
| Model | Fuel Type | % Load | Fuel Consumption, m³/hr. (cfh) | |
|---|---|---|---|---|
| 60 Hz | 50 Hz | |||
| 14RESA | Natural Gas | 100 | 5.4 (193) | 4.9 (175) |
| 75 | 4.7 (163) | 4.2 (148) | ||
| 50 | 3.5 (124) | 3.1 (108) | ||
| 25 | 2.6 (93) | 2.4 (84) | ||
| Exercise | 1.7 (60) | 1.7 (60) | ||
| LPG | 100 | 2.3 (81) | 2.1 (74) | |
| 75 | 2.1 (75) | 1.9 (68) | ||
| 50 | 1.8 (60) | 1.5 (53) | ||
| 25 | 1.2 (45) | 1.1 (40) | ||
| Exercise | 0.8 (30) | 0.8 (30) | ||
Nominal fuel rating: Natural gas: 37 MJ/m³ (1000 Btu/ft³); LPG: 93 MJ/m³ (2500 Btu/ft³).
LPG conversion factors: 8.58 ft.³ = 1 lb.; 0.535 m³ = 1 kg; 36.39 ft.³ = 1 gal.
RDC2 Controller
The RDC2 controller provides integrated control for the generator set, Kohler® Model RXT transfer switch, programmable interface module (PIM), and load shed kit. Its 2-line LCD screen displays status messages and system settings clearly, even in direct sunlight or low light.
RDC2 Controller Features
- Membrane keypad: OFF, AUTO, and RUN pushbuttons; Select and arrow buttons for system configuration and adjustment menus.
- LED indicators: For OFF, AUTO, RUN modes, and utility/generator set source availability and ATS position (Model RXT required).
- LCD display: Two lines x 16 characters per line, backlit with adjustable contrast for excellent visibility.
- Scrolling system status display: Generator set status, voltage, frequency, engine temperature, oil pressure, battery voltage, engine runtime hours, date, and time.
- Smart engine cooldown: Senses engine temperature.
- Digital isochronous governor: Maintains 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 weekly or bi-weekly.
- Exercise modes: Unloaded weekly exercise with diagnostics, unloaded full-speed exercise, and loaded full-speed exercise (Model RXT ATS required).
- Connectivity: Front-access mini USB connector for SiteTech™ or USB Utility connection; Integral Ethernet connector for Kohler® OnCue® Plus.
- Battery charger: Built-in 2.5 amp.
- Remote start/stop: Two-wire capability for optional connection of a Model RDT transfer switch.
Additional RDC2 Controller Features
- Diagnostic messages: Displays messages for engine, generator, transfer switch, PIM, and load management device. Over 70 diagnostic messages available.
- Maintenance reminders.
- System settings: Voltage, frequency, phase, voltage adjustment, measurement system (English/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/frequency settings, engine start time delay, transfer time delays, voltage calibration, fixed pickup/dropout settings.
- Programmable Interface Module (PIM) status displays: Input/Output status (active/inactive).
- Load control menus: Load status, Test function.
Generator Set Sound Data
The Model 14RESA has 8-point logarithmic average sound levels of 63 dB(A) during weekly engine exercise and 67 dB(A) during full-speed generator diagnostics and normal operation. For comparison, competitor lowest sound levels are 58 dB(A) and 63 dB(A) respectively. All sound levels are measured at 7 meters with no load.
Generator Set Standard Features & Available Options
Generator Set Standard Features
- Battery cables
- EPA certified fuel system
- Corrosion-proof polymer sound enclosure
- Critical silencer
- Field-connection terminal block
- Fuel solenoid valve and secondary regulator
- Line circuit breaker
- Multi-fuel system, LPG/natural gas, field-convertible
- Oil drain extension with shutoff valve
- Premium 5-year/2000-hour limited warranty for on-grid (standby) applications
- 18-month/1000-hour limited warranty for non-standby (off-grid) applications
- RDC2 generator set/ATS controller
- Rodent-resistant construction
- Sound-deadening, flame-retardant foam per UL 94, class HF-1
Available Options
- Approvals and Listings: CSA approval
- Communication Accessories: OnCue® Plus Generator Management System
- Concrete Mounting Pads: 3 in. thick or 4 in. thick (recommended for storm-prone areas)
- Electrical Accessories: Battery, Battery heater (120/240 VAC), Cold weather package (120/240 VAC), Emergency stop kit, PowerSync® Automatic Paralleling Module (APM) (single phase only), Programmable interface module (PIM)
- Fuel System Accessories: Flexible fuel line, Carburetor heater (120/240 VAC) (recommended for reliable starting below 0°C / 32°F)
- Literature: General maintenance, Overhaul, Production literature kits
- Maintenance: Maintenance kit (includes air filter, oil, oil filter, spark plugs)
- Automatic Transfer Switches and Accessories: Model RDT ATS, Model RXT ATS, Model RXT ATS with combined interface/load management board, Load shed kit for RXT or RDT, Power relay modules, Other Kohler® ATS
Generator Set Dimensions and Weights
The generator set is a rectangular unit enclosed in a protective housing. The overall dimensions are 1216 x 665 x 733 mm (48 x 26.2 x 29 inches) for Length x Width x Height. The shipping weight is 191 kg (420 lb.). These dimensions are for reference and should not be used for planning installation without consulting a local distributor for more detailed information.
