Kohler 20RESA User manual

Models: 14/20RESA
Multi-Fuel
LP Vapor/Natural Gas
Standard Features
DRDC2 Controller
dOne digital controller manages both the generator set
and transfer switch functions (with optional Model RXT
transfer switch).
dDesigned for today’s most sophisticated electronics.
dElectronic speed control responds quickly to varying
household demand.
dDigital voltage regulation protects your sensitive
electronics from harmonic distortion and unstable power
quality.
dTwo-line, backlit LCD display with adjustable contrast is
easy to read, even in direct sunlight or low light.
DKohler Command PRO Engine Features
dKohler Command PROrOHV engine with hydraulic
valve lifters for reliable performance without routine
valve adjustment or lengthy break-in requirements
dPowerful, reliable air-cooled performance
dSimple field conversion between natural gas and LP
vapor fuels while maintaining emission certification
DDesigned for Easy Installation
dPolymer base eliminates the need for a concrete
mounting pad, reducing installation time and cost
dHinged, locking roof
dFuel and electrical connections through the enclosure
wall eliminate the need for stub-ups through the bottom
dLoad connection terminal block allows easy field wiring
dDesigned for outdoor installation only
DCertifications
dMeets emission regulations for U.S. Environmental
Protection Agency (EPA) phase 2 small off-road engines
and CA 2006 and later LSI engines with both LP vapor
and natural gas
dUL 2200 listed (60 Hz model)
dCSA certification available (60 Hz model)
dApproved for stationary standby applications in locations
served by a reliable utility source
dModel 14RESA is also approved for non-standby
(off-grid) applications (18 month or 1000 hour warranty
applies for non-standby applications)
The KohlerrAdvantage
DHigh 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.
DExtraordinary Reliability
Kohler is known for extraordinary reliability and
performance and backs that up with an industry-leading
5-year or 2000 hour warranty.
DPowerful Performance
Exclusive Powerboostttechnology provides excellent
starting power. The Kohler 14 kW generator can easily
startandruna5tonairconditioner without dropping power
to other appliances.*
DExclusive 100% Corrosion-Proof Enclosure
The bold new Kohler design is completely corrosion proof,
even in harsh seaside environments, and is
impact-resistant even at --34_C(--30_F).
DFast Response
Kohler’s unique Fast-Responsetexcitation system
delivers excellent voltage response and short-circuit
capability.
DQuiet Operation
Kohler home generators provide quiet, neighborhood-
friendly performance.
G4-209 (14/20RESA) 12/11
Generator Ratings
Model Voltage Phase Hz Alternator
Standby Ratings
Natural Gas LP Gas
kW/kVA Amps kW/kVA Amps
14RESA 120/240 1 60 2F5 12/12 50.0 14/14 58.3
115/230 1 50 2F5 10/10 43.5 11/11 47.8
20RESA 120/240 1 60 2F7 18/18 75.0 20/20 83.3
115/230 1 50 2F7 14/14 60.8 15/15 65.2
RATINGS: Standby ratings apply to installations served by a reliable utility source. 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).
Availability is subject to change without notice. The generator set manufacturer reserves the right to change the design or specifications without notice and without any obligation or liability whatsoever.
Contact your local Kohler Co. generator distributor for availability.
* Check the appliance manufacturer’s specifications for actual power requirements. Consult a KohlerrPower Systems professional to calculate your exact residential power system
requirements.

G4-209 (14/20RESA) 12/11
Alternator Specifications
Alternator Specifications
Specifications
PowerBoosttGenerator
1-Phase
Manufacturer Kohler
Output reconnectable 120/240
Type 2-Pole, Rotating Field
Leads, quantity 4
Voltage regulator Digital
Insulation: NEMA MG1-1.66
Material Class H
Temperature rise Class H
Bearing: quantity, type 1, Sealed Ball
Coupling Direct
Amortisseur windings Full
Voltage regulation, no-load to full-load
RMS ±0.5%
One-step load acceptance 100% of Rating
Peak motor starting kVA @ 240 V:
14RESA 35
20RESA 40.5
Alternator Features
DCompliance with NEMA, IEEE, and ANSI standards for
temperature rise
DSelf-ventilated and dripproof construction
DVacuum-impregnated windings with fungus-resistant
epoxy varnish for dependability and long life
DSuperior voltage waveform and minimum harmonic
distortion from skewed alternator construction
DDigital voltage regulator with ±1.5% no-load to full-load
RMS regulation
DRotating-field alternator with static exciter for excellent
load response
DSkewed generator construction produces a smooth
AC waveform
Application Data
Engine
Engine Specifications 14RESA 20RESA
Manufacturer Kohler
Engine: model, type CH740
4-Cycle
CH1000
4-Cycle
Cylinder arrangement V-2
Displacement, cm3(cu. in.) 725 (44) 999 (61)
Bore and stroke, mm (in.) 83 x 67
(3.27 x 2.64)
90 x 78.5
(3.54 x 3.1)
Compression ratio 9:1 8.8:1
Main bearings: quantity, type 2, Parent Material
Rated RPM
60 Hz 3600
50 Hz 3000
Max. engine power at rated rpm, kW (HP)
LP vapor, 60 Hz 17.6 (23.6) 23.0 (30.9)
LP vapor, 50 Hz 15.8 (21.2) 20.0 (26.8)
Natural gas, 60 Hz 15.3 (20.5) 20.2 (27.1)
Natural gas, 50 Hz 13.8 (18.5) 16.8 (22.5)
Cylinder head material Aluminum
Valve material Steel/Stelliter
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
Exhaust
Exhaust System 14RESA 20RESA
Exhaust temperature exiting the
enclosure at rated kW, dry, _C(_F) 260 (500)
Engine Electrical
Engine Electrical System 14RESA 20RESA
Ignition system Electronic,
Capacitive Discharge
Starter motor rated voltage (DC) 12
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
Lubrication
Lubricating System 14RESA 20RESA
Type Full Pressure
Oil capacity (with filter), L (qt.) 1.9 (2.0) 2.8 (3.0)
Oil filter: quantity, type 1, Cartridge
Oil cooler Integral
Fuel Pipe Size
Minimum Gas Pipe Size Recommendation, in. NPT
Pipe
Length,
m (ft.)
14RESA 20RESA
Natural
Gas
193,000
Btu/hr.
LP Vapor
203,000
Btu/hr.
Natural
Gas
281,000
Btu/hr.
LP Vapor
340,000
Btu/hr.
8 (25) 3/4 3/4 1 3/4
15 (50) 1 3/4 1 1
30 (100) 1 1 1 1/4 1
46 (150) 1 1/4 1 1 1/4 1 1/4
61 (200) 1 1/4 1 1 1/4 1 1/4

G4-209 (14/20RESA) 12/11
Fuel Requirements
Fuel System 14RESA 20RESA
Fuel types Natural Gas or LP Vapor
Fuel supply inlet 1/2 NPT
Fuel supply pressure, kPa (in. H2O):
Natural gas 1.2--2.7 (5-11)
LP 1.7--2.7 (7-11)
Fuel Composition Limits * Nat. Gas LP Gas
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.
C4and higher, % by volume 0.3 max. 2.5 max.
Sulfur, ppm mass (maximum) 25 max.
Lower heating value,
MJ/m3(Btu/ft3), min. 33.2 (890) 84.2 (2260)
* Contact your local distributor for suitability and rating derates based
on fuel compositions outside these limits.
Operation Requirements
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)
LP Vapor
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)
20RESA
Natural Gas
100 8.0 (281) 6.4 225
75 6.9 (243) 5.4 189
50 4.6 (161) 3.9 139
25 3.6 (127) 2.9 103
LP Vapor
100 3.9 (136) 2.9 102
75 3.1 (109) 2.4 85
50 2.3 (82) 1.8 63
25 1.7 (59) 1.3 47
Nominal fuel rating: Natural gas: 37 MJ/m3(1000 Btu/ft.3)
LP gas: 93 MJ/m3(2500 Btu/ft.3)
LP gas conversion factors: 8.58 ft.3=1lb.
0.535 m3=1kg
36.39 ft.3= 1 gal.
Sound Data
Model 14RESA sound level is 63 dBA during weekly engine
exercise and 67 dBA during full-speed generator diagnostics
and normal operation.
Model 20RESA sound level is 64 dBA during weekly engine
exercise and 69 dBA during full-speed generator diagnostics
and normal operation.
All sound levels are measured at 7 meters with no load.
RDC2 Controller
The RDC2 controller provides integrated control for the
generator set, KohlerrModel 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
DMembrane keypad
dOFF, AUTO, and RUN pushbuttons
dSelect and arrow buttons for access to system
configuration and adjustment menus
DLED indicators for OFF, AUTO, and RUN modes
DLED indicators for utility power and generator set source
availability and ATS position (Model RXT transfer switch
required)
DLCD display
dTwo lines x 16 characters per line
dBacklit display with adjustable contrast for excellent
visibility in all lighting conditions
DScrolling system status display
dGenerator set status
dVoltage and frequency
dEngine temperature
dOil pressure
dBattery voltage
dEngine runtime hours
DDate and time displays
DSmart engine cooldown senses engine temperature
DDigital isochronous governor to maintain steady-state speed
at all loads
DDigital voltage regulation: ±0.5% RMS no-load to full-load
DAutomatic start with programmed cranking cycle
DProgrammable exerciser can be set to start automatically on
any future day and time, and run every week or every two
weeks
DExercise modes
dUnloaded weekly exercise with complete system
diagnostics
dUnloaded full-speed exercise
dLoaded full-speed exercise (Model RXT ATS required)
DFront-access mini USB connector for SiteTechtconnection
DFront access mini-breaker protects the alternator
DIntegral Ethernet connector for KohlerrOnCuet
DBuilt-in 2.5 amp battery charger
DRemote two-wire start/stop capability for optional connection
of Model RDT or RSB transfer switches
See additional controller features on the next page.

©2011 by Kohler Co. All rights reserved.
DISTRIBUTED BY:
Generator Set Dimensions and Weights
Overall Size, L x W x H: 1216 x 665 x 733 mm
(48 x 26.2 x 29 in.)
Shipping Weight: 14RESA 191 kg (420 lb.)
20RESA 243 kg (535 lb.)
NOTE: Dimensions are provided for reference only and should not be used for planning
installation. Contact your local distributor for more detailed information.
H
L
W
G4-209 (14/20RESA) 12/11
Additional RDC2 Controller Features
DDiagnostic messages
dDisplays diagnostic messages for the engine, generator,
Model RXT transfer switch, programmable interface
module (PIM), and load control module (LCM)
dOver 70 diagnostic messages can be displayed
DMaintenance reminders
DSystem settings
dSystem voltage, frequency, and phase
dVoltage adjustment
dMeasurement system, English or metric
DATS status (Model RXT ATS required)
dSource availability
dATS position (normal/utility or emergency/generator)
dSource voltage and frequency
DATS control (Model RXT ATS required)
dSource voltage and frequency settings
dEngine start time delay
dTransfer time delays
dVoltage calibration
dFixed pickup and dropout settings
DProgrammable Interface Module (PIM) status displays
dInput status (active/inactive)
dOutput status (active/inactive)
DLoad control module (LCM) menus
dLoad status
dTest function
Generator Set Standard Features
DBattery cables
DCARB- and EPA-certified fuel system
DCorrosion-proof polymer sound enclosure
DCritical silencer
DField-connection terminal block
DFuel solenoid valve and secondary regulator
DLine circuit breaker:
14RESA: 70 amps
20RESA: 100 amps
DMulti-fuel system, LP vapor/natural gas, field-convertible
DOil drain extension with shutoff valve
DPremium 5-year limited warranty
D18-month limited warranty for non-standby (off-grid)
applications (14RESA only)
DRDC2 generator set/ATS controller
DRodent-resistant construction
DSound-deadening, flame-retardant foam per UL 94,
class HF-1
Available Options
Communication Accessories
-OnCuetHome Generator Management System
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)
Available Options, Continued
Electrical System
-Battery
-Battery heater
Fuel System
-Braided stainless steel flexible fuel line
Literature
-General maintenance literature kit
-Overhaul literature kit
-Production literature kit
Starting Aids
-Carburetor heater, 120 VAC (recommended for
reliable starting at temperatures below 0_C[32_F])
-Fuel regulator heater pad (20RESA; recommended for
reliable starting at temperatures below --18_C[0_F])
KohlerrAutomatic Transfer Switch
-Model RXT, see specification sheet G11-121
-Model RDT, see specification sheet G11-98
-Model RSB, see specification sheet G11-101
-Other KohlerrATS
Miscellaneous Accessories
-__________________________________________
-__________________________________________
KOHLER CO., Kohler, Wisconsin 53044 USA
Phone [phone], Fax [phone]
For the nearest sales and service outlet in the
US and Canada, phone [phone]
KohlerPower.com
Kohler Power Systems
Asia Pacific Headquarters
7 Jurong Pier Road
Singapore 619159
Phone [phone], Fax [phone]