Section 1 Specifications; Introduction; Generator Set Ratings; Controller Specifications - Kohler 8.5RES Service Manual

1.1 Introduction

The spec sheets for each generator set provide specific
generator and engine information.
generator set spec sheet for data not supplied in this
manual. Consult the generator set installation manual,
engine operation manual, and engine service manual
for additional specifications.

1.2 Generator Set Ratings

See the generator set ratings table, below. Consult the
generator set nameplate for specific generator set
ratings.

1.3 Controller Specifications

The generator set is equipped with the Advanced Digital
Control. For a specific description of the controller, see
Section 2, Operation, in the operation manual.
Environmental Specification
Operating temperature
Storage temperature
Humidity
Power requirements:
Voltage
Current Current
Generator Set Ratings
Model Model
Series Voltage
8.5RES 120/240
8.5RES 115/230
12RES 120/240
12RES 115/230
RATINGS: Standby ratings apply to installations served by a reliable utility source. All single-phase units are rated at 1.0 power factor. The standby rating is applicable to variable loads with an
average load factor of 80% for the duration of the power outage. No overload capacity is specified at this rating. Ratings are in accordance with ISO--3046/1, BS5514, AS2789, and DIN 6271.
GENERAL GUIDELINES FOR DERATING: ALTITUDE: Derate 4% per 305 m (1000 ft.) elevation above 153 m (500 ft.). TEMPERATURE: Derate 1.5% per 5.5_C (10_F) temperature
increase above 16_C (60_F). Availability is subject to change without notice. Kohler Co. reserves the right to change the design or specifications without notice and without any obligation or
liability whatsoever. Contact your local Kohler Co. generator distributor for availability.
Figure 1-1 Generator Set Ratings
TP-6196 5/04
Refer to the
8.5/12RES
--20_ to 70_C
--60_ to 70_C
0--95% condensing
12 or 24 VDC
250 mA @ 12 VDC 250 mA @ 12 VDC
125 mA @ 24 VDC
Generator Generator
Phase Hz Model
1 60 2F4
1 50 2F4
1 60 2F4
1 50 2F4

Section 1 Specifications

1.4 Engine Features

The 8.5/12RES generator sets are equipped with
four-cycle, twin cylinder, air-cooled Kohler engines.
Some of the engine features include:
D
One-side serviceability of air cleaner, carburetor, oil
fill, dipstick, and oil drain.
D
Efficient overhead valve design and full pressure
lubrication for maximum power, torque, and reliability
under all operating conditions.
D
Electronic governor to ensure AC power output is
maintained at desired frequency.
D
Overspeed shutdown to prevent governed frequency
from exceeding 70 Hz on 60 Hz models (60 Hz on
50 Hz models).
D
Low oil pressure cutout to prevent failure.
D
Dependable, maintenance free electronic ignition.
D
Digital Spark Advance Module (DSAM) optimizes
engine timing for natural gas or LP fuel (12RES only)
D
Parts subject to the most wear and tear made from
precision formulated cast iron.
D
Hydraulic valve adjusters to eliminate the need for
valve adjustments.
D
Field-convertible fuel systems that allow fuel
changeover from natural gas to LP vapor (and
vice-versa) while maintaining CARB certification.
For engine service information and specifications not
covered in this manual, see the Engine Service Manual.
See the List of Related Materials in the Introduction
Section.
Standby Amps
Natural Gas LP Gas
29 35
27 33
43 50
40 46
Standby Ratings, kW/kVA
Natural Gas LP Gas
7.0/7.0 8.5/8.5
6.3/6.3 7.5/7.5
10.4/10.4 12.0/12.0
9.3/9.3 10.5/10.5
Section 1 Specifications 1