Kohler 8.5/12RES warranty Application Data

Page 2

 

Application Data

Engine

Operation Requirements

Engine Specifications

60 Hz

50 Hz

Manufacturer

Kohler

Engine: model, type

 

 

8.5RES

CH640 4-Cycle

12RES

CH740 4-Cycle

Cylinder arrangement

 

V-2

Displacement, L (cu. in.)

 

 

8.5RES

0.624 (38)

12RES

0.725 (44)

Bore and stroke, mm (in.)

 

 

8.5RES

77 x 67 (3.03 x 2.64)

12RES

83 x 67 (3.27 x 2.64)

Compression ratio

 

 

8.5RES

8.5:1

12RES

9.0:1

Main bearings: quantity, type

2, Parent Material

Rated rpm

3600

3000

Max. engine power at rated rpm, kW (HP)

 

 

CH640, LP vapor

11.5 (15.4)

10 (14.0)

CH640, natural gas

10.0 (13.4)

9.1 (12.2)

CH740, LP vapor

17.6 (23.6)

15.8 (21.2)

CH740, natural gas

15.3 (20.5)

13.8 (18.5)

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, DSAM

Starter motor rated voltage (DC)

 

12

Battery charger, ampere rating

 

6

Battery (purchased separately):

 

 

Ground

Negative

Volts (DC)

 

12

Battery quantity

 

1

Recommended cold cranking amps

 

 

(CCA) rating for --18_C (0_F)

 

525

Exhaust

 

 

 

 

 

Exhaust System

60 Hz

50 Hz

Exhaust flow at rated kW, m3/min. (cfm)

 

 

8.5RES

3.3 (115)

2.7 (96)

12RES

3.8 (135)

3.2 (113)

Exhaust temperature at rated kW, dry

 

 

exhaust, _C (_F)

760 (1400)

Lubrication

Lubricating System

 

 

8.5RES

 

 

12RES

 

Cooling Air

60 Hz

50 Hz

60 Hz

50 Hz

Total inlet air,

 

 

 

 

 

 

 

 

m3/min. (cfm)

27.8

(980)

23.2

(820)

28.0

(990)

23.4

(825)

Cooling air,

 

 

 

 

 

 

 

 

m3/min. (cfm)

26.9

(950)

22.4

(790)

26.9

(950)

22.4

(790)

Combustion air,

 

 

 

 

 

 

 

 

m3/min. (cfm)

0.9

(33.4)

0.8

(28.0)

1.1

(39.2)

0.9

(32.6)

Fuel Requirements

Fuel System

Fuel types

 

 

 

 

Natural Gas or LP Vapor

Fuel supply inlet

 

 

 

1/2 NPT

 

Fuel supply pressure, kPa (in. H2O):

 

 

 

 

 

Natural gas

 

 

 

1.2--2.7 (5-11)

 

LP

 

 

 

 

 

1.7--2.7 (7-11)

 

 

 

 

Minimum Gas Pipe Size Recommendation, in. NPT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.5RES

 

 

12RES

 

 

 

 

 

 

 

Pipe

Natural Gas

LP Vapor

Natural Gas

LP Vapor

Length,

(132,000

(180,000

(193,000

(203,000

m (ft.)

Btu/hr.)

Btu/hr.)

Btu/hr.)

Btu/hr.)

 

 

 

 

 

 

 

 

 

 

 

8

(25)

 

 

3/4

 

1/2

 

3/4

 

3/4

15

(50)

 

 

3/4

 

3/4

 

1

 

3/4

30(100)

 

 

1

 

1

 

1

 

1

46(150)

 

 

1

 

1

1 1/4

 

1

61(200)

 

 

1

 

1

1 1/4

 

1

 

 

 

 

 

Fuel Consumption at % rated load

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.5RES

 

 

12RES

 

 

 

 

 

 

 

% Load

60 Hz

50 Hz

60 Hz

50 Hz

Natural Gas, m3/hr. (cfh)

 

 

 

 

 

 

100%

 

3.7

(132)

3.3

(118)

5.4

(193)

4.8

(173)

75%

 

3.2

(113)

2.9

(101)

4.7

(163)

4.2

(148)

50%

 

2.6

(93)

2.3

(83)

3.5

(124)

3.1

(108)

25%

 

2.2

(77)

1.9

(69)

2.6

(93)

2.4

(84)

 

 

 

 

 

 

 

LP Vapor, m3/hr. (cfh)

 

 

 

 

 

 

100%

 

2.0

(72)

1.7

(61)

2.3

(81)

2.1

(74)

75%

 

1.3

(45)

1.1

(38)

2.1

(75)

1.9

(68)

50%

 

1.0

(36)

0.9

(31)

1.8

(60)

1.5

(53)

25%

 

0.8

(29)

0.7

(25)

1.2

(45)

1.1

(40)

 

 

 

 

 

 

 

LP Vapor, kg/hr. (lb./hr.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100%

 

3.7

(8.4)

3.2

(7.1)

4.3

(9.4)

3.9

(8.6)

75%

 

2.4

(5.2)

2.1

(4.4)

3.9

(8.7)

3.6

(7.9)

50%

 

1.9

(4.2)

1.7

(3.6)

3.4

(7.0)

2.8

(6.2)

25%

 

1.5

(3.4)

1.3

(2.9)

2.2

(5.2)

2.1

(4.7)

LP vapor conversion factors:

8.58ft.3 = 1 lb. 0.535 m3 = 1 kg

36.39ft.3 = 1 gal.

Nominal fuel rating:

37 MJ/m3 (1000 Btu/ft.3)

Natural gas:

LP vapor:

93 MJ/m3 (2500 Btu/ft.3)

Type

Full Pressure

Oil capacity (with filter), L (qt.)

1.9 (2.0)

Oil filter: quantity, type

1, Cartridge

Oil cooler

Integral

G4-97 (8.5/12RES) 4/14n

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Contents Kohlerr Advantage Generator Ratings Standard FeaturesModel 8.5/12RES Multi-Fuel LP Vapor/Natural GasApplication Data Controller Features Alternator FeaturesAlternator Specifications AlternatorStandard Features Available Accessories

8.5/12RES specifications

The Kohler 8.5/12RES is a highly efficient standby generator designed for residential use. Power outages can be disruptive and inconvenient, making a reliable backup power solution essential for homeowners. Kohler has a long-standing reputation in the power generation industry, and this generator exemplifies their commitment to quality, reliability, and innovative technology.

One of the standout features of the Kohler 8.5/12RES is its ability to deliver both 8.5 kW and 12 kW of power, depending on the specific model. This versatility allows homeowners to choose the right level of power for their needs. The generator is equipped with a reliable Kohler engine that is designed for durability and long-lasting performance. Its robust design ensures that it can withstand the rigors of frequent use, making it an excellent investment for any home.

Another important characteristic of the Kohler 8.5/12RES is its advanced noise-reduction technology. The generator operates at a sound level that is significantly lower than many comparable units on the market. This means that homeowners can enjoy peace of mind during power outages without excessive noise disrupting their daily activities.

The generator also features a user-friendly control panel that simplifies operation. Homeowners can easily monitor the generator's performance and status, allowing for quick troubleshooting in the event of any issues. Additionally, the model is equipped with a fully automatic transfer switch, which ensures that power is restored to the home seamlessly during outages, providing comfort and security to residents.

In terms of fuel efficiency, the Kohler 8.5/12RES is designed to consume minimal fuel while delivering maximum power output. This efficiency not only reduces operating costs but also minimizes the environmental impact of the generator.

Safety is another priority with the Kohler 8.5/12RES. It comes with multiple safety features designed to protect both the generator and the home. These include over-speed protection and low-oil shutdown, ensuring that the generator operates safely and effectively.

In conclusion, the Kohler 8.5/12RES stands out as a reliable, efficient, and user-friendly standby generator that provides homeowners with the power they need during unexpected outages. With advanced features, durable construction, and ease of use, it represents an excellent solution for achieving energy independence and security. Whether for essential appliances or keeping the household running smoothly, this generator remains a smart choice for any homeowner looking for peace of mind.
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