TP-5977 7/98 Installation 31
For LP gas system, use UL classified pipe joint sealing
compound to prevent dangerous fuel leaks. Use a
sealingcompoundapprovedfor usewithLPgas. Apply
UL classified sealing compound at all fuel line pipe
joints.
Use flexible fuel lines in areas where vibration and/or
movement of connected components is likely, such as
the main fuel line to the generator set. Use seamless
steel tubing wherever longmain fuellines are required.
Testing fuel system. AfteralltheLPconnectionshave
been completed, pressure test the entire system to
6-8 ounces (10-14 inches water column). Test the
connections for leakage with soapy water or bubble
solution. Do not usesolutions that contain ammoniaor
chlorine, since the solution will not bubble for an
accurate leakage test.
Thegassupplypressureshouldnotexceedsixounces.
Tocheckinletpressure,removeplugonfuelinletforgas
regulator. Insert ounce pressure gauge or manometer.
Adjust operating pressureto 4-6 ounces or 7-11 inches
water column; adjust inlet pressure on the primary
regulator.
NOTE
Fuelleakagecouldcauseanexplosion. Aftermakingall
LP gas connections pressure test the entire system to
6-8 ounces (10-14 inches water column).
NOTE
Gas pressure above 10 ounces can result in
non-operation of the gas valve.
6.6 Electrical System
Connection of the load leads, battery, and if required
remote switch panel complete the generator set
installation. Thefollowingparagraphsgivesomedetails
on each connection. Refer to the wiring diagrams in
Section5—WiringDiagramsforspecificdetails. Havea
qualified electrician make connections.
Wiring. Securely support or harness all wiring to the
generator set to prevent abrasion. Provide additional
support for wiring to prevent exposure to exhaust
system components. Maintain at least a 2 in. (51 mm)
clearance between electrical wiring and hot exhaust
components. Do not locate wiring directly below or in
close proximity to fuel system parts or oil-fill.
6.6.1 AC Load Lead Connections
Each generator set has four color-coded lead leads.
The black leads (L1 andL2) arehot, thewhite lead(L0)
is neutral, and the green lead is the hazard ground.
Routetheloadleadsdirectlyfromthejunctionboxtothe
vehicle AC circuit or transfer switch connection. Route
the load leads through flexible conduit from the
generatorendbrackettothejunctionboxlocation. Keep
the load lead junction box accessible for servicing and
inspection.
NOTE
Keep load lead circuit away from the generator,
especially fuel and exhaust system components.
NOTE
Use field-supplied wiring capable of withstanding
temperatures of 167_F (75_C)
ACloadleadL0(whiteorgray)indicatestheneutrallead
on Kohler generator sets. Make sure to connect the
neutral of the AC circuit in the vehicle to the lead L0
(white or gray). If the vehicle uses equipment
ground-type plugs and receptacles (3-pronged),
connectthegreenwiretotheU-shapedpin. Onvehicles
which also have provisions for using an outside AC
power source, completely isolate the neutral as well as
the hot (or black) leads from the generator set when
switching power to theoutside source. See Figure 6-5.
NOTE
Use a triple-pole,double-throw transfer switch rated for
the calculated load of the vehicle to transfer the load
from one source to the other. Install a ground-fault
circuit interrupter in the wiring system to protect all
branch circuits.
NOTE
Protect the AC load circuit of the generator set against
overload or short circuit with a circuit breaker(s) .
NOTE
For standby service connect output of generator to
suitably rated transfer switch in accordance with
Canadian Electrical Code, Part 1.
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