Spec Sheet

G4-246 (20RESC) 1/19d
Application Data
Engine
Engine Specifications
Manufacturer Kohler
Engine: model, type CH1000 4-Cycle
Cylinder arrangement V-2
Displacement, cm
3
(cu. in.) 999 (61)
Bore and stroke, mm (in.) 90 x 78.5 (3.54 x 3.1)
Compression ratio 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)
LPG, 60 Hz 23.0 (30.9)
LPG, 50 Hz 20.0 (26.8)
Natural gas, 60 Hz 20.2 (27.1)
Natural gas, 50 Hz 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
Engine Electrical
Engine Electrical System
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
Exhaust
Exhaust System
Exhaust temperature exiting the
enclosure at rated kW, dry, _C(_F)
260 (500)
Lubrication
Lubricating System
Type Full Pressure
Oil capacity (with filter), L (qt.) 1.9 (2.0)
Oil filter: quantity, type 1, Cartridge
Oil cooler Integral
Fuel Pipe Size
Minimum Gas Pipe Size Recommendation, in. NPT
Pipe Length,
m(ft.)
Natural Gas
281,000
Btu/hr.
LPG
340,000
Btu/hr.
8(25)
1 3/4
15 (50) 1 1
30 (100) 1 1/4 1
46 (150) 1 1/4 1 1/4
61 (200) 1 1/4 1 1/4
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
), (minimum)
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)
60 Hz 50 Hz
20RESC
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)
Exercise 2.0 (71) 2.0 (71)
LPG
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)
Exercise 1.0 (35) 1.0 (35)
Nominal fuel rating: Natural gas: 37 MJ/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.