Kohler 12RES, Installation Manual

Page: 22 / 56

TP-6514 9/09 22 Section 1 Installation
1.5 Power Supply
Power must be supplied from a source that is GFCI
protected to the generator set location for the battery
charger and the optional accessories shown in
Figure 1-12.
Connect power from a circuit on the essential loads
panel to the utility power connection points on the
terminal block. See Section 1.8 and the wiring diagrams
in Section 2 for connection details. See Figure 1-12 or
Figure 1-13 for the power requirements for the battery
charger and accessories.
Equipment
Power Requirement, Max.
Watts Amps Volts
Battery charger (standard) 192 1.6
120 Carburetor heater (optional) 37 0.33
Battery heater (optional) 110 0.92
Figure 1-12 Power Requirements, RES Models
Equipment
Power Requirement, Max.
Watts Amps Volts
Battery charger 60 0.26
230
Carburetor heater 37 0.16
Figure 1-13 Power Requirements, TRES (3-phase)
Models
1.6 Fuel Requirements
The generator set operates using natural gas or LP
vapor fuel. The generator set is EPA-certified for both
natural gas and LP vapor fuels.
The fuel system installation must comply with the NEC
and local codes.
1.6.1 Fuel Supply
Because of variable climates and geographical
considerations, contact the local fuel supplier for fuel
system planning and installation. Figure 1-14 lists the
recommended fuel ratings and other fuel supply
information for natural gas and LP vapor fuels.
Fuel type
Natural
Gas
LP
Vapor
Fuel supply inlet 1/2 NPT
Fuel supply pressure, kPa (in. H
2
O)
8.5/12 kW
1.3--2.7
(5--11)
1.7--2.7
(7--11)
Fuel supply pressure, kPa (in. H
2
O),
17/18 kW
1.7--2.7
(7--11)
Fuel flow rate, Btu/hr.
8.5 kW 132000 180000
12 kW 193000 203000
17/18 kW 242000 280000
Nominal Fuel Rating, Btu/ft.
3
Natural gas 1000
LP vapor 2500
Figure 1-14 Fuel Supply
Verify that the output pressure from the primary gas
utility (or LP tank) pressure regulator is 1.7--2.7 kPa
(7--11 in. water column) and that the utility gas meter
flow rate is sufficient to supply the generator set at rated
load plus all other gas-consuming appliances.
See
Figure 1-15, Figure 1-16, or Figure 1-17 for fuel
consumption. Contact the fuel supplier for flow rate
information or a gas meter upgrade.
Figure 1-2 or Figure 1-5 shows the location of the fuel
inlet connection. Use flexible sections to prevent fuel
line breakage caused by vibration.
Hold the fuel
solenoid valve with a wrench when tightening the fuel
connections. Protect all fuel lines from machinery or
equipment contact, adverse weather conditions, and
environmental damage.