Specification

G4-250 (20RESCL) 7/15
Fuel Requirements
Fuel System
Fuel types Natural Gas or LPG
Fuel supply inlet 1/2 NPT
Fuel supply pressure, kPa (in. H
2
O):
Natural gas 0.9 --2.7 (3.5-11)
LP 1.7--2.7 (7-11)
Fuel Composition Limits *
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.
C
4
and higher, % by volume 0.3 max. 2.5 max.
Sulfur, ppm mass (maximum) 25 max.
Lower heating value,
MJ/m
3
(Btu/ft
3
), 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,
m
3
/hr. (cfh)
20RESCL
Natural
Gas
100
8.0 (281)
75 6.9 (243)
50 4.6 (161)
25 3.6 (127)
Exercise 2.0 (71)
LPG
100
3.9 (136)
75 3.1 (109)
50 2.3 (82)
25 1.7 (59)
Exercise 1.0 (35)
Nominal fuel rating: Natural gas: 37 M J/m
3
(1000 Btu/ft.
3
)
LPG: 93 MJ/m
3
(2500 Btu/ft.
3
)
LPG conversion factors: 8.58 ft.
3
=1lb.
0.535 m
3
=1kg
36.39 ft.
3
= 1 gal.
Generator Set Sound Data
Model 20RESCL 8 point logarithmic average sound levels are
64 dB(A) during weekly engine exercise and 69 dB(A) during
full-speed generator diagnostics and normal operation. For
comparison to competitor ratings, the lowest point sound levels
are 62 dB(A) and 67 dB(A) respectively.*
All sound levels are measured at 7 meters with no load.
* Lowest of 8 points measured around the generator. Sound levels at
other points around generator may vary depending on installation
parameters.
DC2 Controller
V oltage: 240 V
Freq: 60.0 Hz
The DC2 controller provides integrated control for the generator
set, Kohlerr Model RXT transfer switch, programmable
interface module (PIM), and load management.
The DC2 controller’s 2-line LCD display provides a clear,
easy-to-read display of status messages even in direct sunlight
or low light.
DC2 Controller Features
D OFF, AUTO, RUN, and EXERCISE pushbuttons
D LED indicators for OFF, AUTO, RUN, and EXERCISE modes
D LCD display:
d Two lines x 16 characters per line
d Backlit display with adjustable contrast for excellent
visibility
D Scrolling system status display:
d Generator set status
d Voltage and frequency
d Engine temperature
d Oil pressure
d Battery voltage
d Engine runtime hours
d Maintenance reminders
d OnCuer status (connected/disconnected)
D Smart engine cooldown senses engine temperature
D Digital isochronous governor to maintain steady-state speed
at all loads
D Digital voltage regulation: ±1.0% RMS no-load to full-load
D Automatic start with programmed cranking cycle
D Exercise modes:
d Unloaded weekly exercise with complete system
diagnostics
d Unloaded full-speed exercise
d Loaded full-speed exercise (Model RXT ATS required)
D Front-access mini USB connector for SiteTecht or USB
Utility connection
D Integral Ethernet connector for Kohlerr OnCuer Plus
D Built-in 2.5 amp battery charger
D Remote two-wire start/stop capability for optional connection
of a Model RDT transfer switch
D Diagnostic messages:
d Displays diagnostic messages for the engine, generator
set, model RXT transfer switch, and optional
programmable interface module (PIM).
d Over 70 diagnostic messages can be displayed
D A laptop computer and Kohlerr SiteTecht software can be
used to change system settings or upgrade controller
firmware