Unit-Mounted Radiator Cooling; System Features; Recommended Coolant; Fuel Supply - Kohler 15RYG Installation Manual

1.6 Unit-Mounted Radiator Cooling

The generator set is equipped with a unit-mounted
radiator common cooling system.
1.6.1

System Features

The system's major components include an engine-
driven fan and circulating water pump, a radiator, and a
thermostat. The pump circulates water through the
engine until it reaches operating temperature. Then the
engine thermostat opens, allowing water circulation
through the radiator. The thermostat restricts water flow
as necessary to prevent overcooling. The fan blows air
from the engine side of the radiator across the cooling
surface.
1.6.2

Recommended Coolant

Add antifreeze before starting the generator set or
energizing the block heater.
The generator set manufacturer recommends a solution
of 50% ethylene glycol and 50% clean, softened water to
provide freezing protection to --37_C (--34_F) and
boiling protection to 129_C (256_F). A 50/50 solution
also inhibits corrosion.
manufacturer's operation manual for engine coolant
specifications.

1.7 Fuel Supply

Gas fuel systems operate on either LP (liquefied
petroleum) or natural gas. Refer to the the instructions
in Section 3.8 for more detailed information on fuel
requirements.
Note: Design and install gas fuel systems in
accordance with NFPA-54, National Fuel Gas
Code, and applicable local codes.
Gas lines. Never use fuel piping to ground electrical
equipment. The gas supplier is responsible for
installation, repair, and alteration to gas piping.
Use Schedule 40 black-iron pipe for gas piping. Copper
tubing may be used if the fuel does not contain hydrogen
sulfide or other ingredients that react chemically with
copper.
Line size. Size piping according to the requirements of
the equipment. Refer to the the instructions in
Section 3.8. In addition to the actual fuel consumption,
consider the following pressure loss factors:
D
Pipe length
D
Other appliances on the same fuel supply
D
Number of fittings
12 Section 1 General
Consult the engine
Flexible connections. Rigid-mount the piping but
protect it from vibration. Use flexible connections
spanning a minimum of 152 mm (6 in.) between the
stationary piping and the engine fuel inlet connection.

1.8 Electrical System

Before installing the generator set, provide for electrical
connections through conduit to the transfer switch and
other accessories for the generator set. Route DC leads
in separate conduit from AC conductors.
install the selected generator set accessories. Route
wiring to the generator set through flexible connections.
Comply with all applicable codes when installing a wiring
system.
1.8.1

Line Circuit Breakers

AC circuit protection. All AC circuits must include
circuit breaker or fuse protection. If the generator set is
not equipped with a factory-installed circuit breaker,
select a circuit breaker for up to 125% of the rated
generator set output current. The circuit breaker must
open all ungrounded connectors. The circuit breaker or
fuse must be mounted within 7.6 m (25 ft.) of the
alternator output terminals.
1.8.2

Electrical Connections

Several electrical connections must be made between
the generator set and other components of the system
for proper operation. Most field-installed accessory kits
include installation instructions. Comply with applicable
national and local codes when installing a wiring system.
Size the wire according to the length of run and 115% of
the circuit current (amperage) as directed by the
National Electrical Coder (NEC) in ANSI/NFPA 70.
The National Electrical Coder is a registered trademark of the
National Fire Protection Association, Inc.
1.8.3

Ground and Neutral Connections

Ground the generator set. The grounding method must
comply with NEC and local codes.
grounding strap to the generator set ground lug,
terminal GND inside the junction box.
Various regulations and site configurations including the
National Electrical Code (NEC), local codes, and the
type of transfer switch used in the application determine
the grounding of the neutral at the generator. NEC 2002
Section 250.20 is one example that has a very good
explanation of the neutral grounding requirements for
generators.
Carefully
Connect the
TP-6329 8/07