Kohler 14-20RESAL, 14-20RESA User Manual

4.7 (3)

Operation

Residential/Commercial Generator Sets

Models:

14/20RESA

14/20RESAL

Controllers:

RDC2

DC2

TP-6804 12/11

California Proposition 65

WARNING

Engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product Identification Information

Product identification numbers determine service parts. Record the product identification numbers in the spaces below immediately after unpacking the products so that the numbers are readily available for future reference. Record field-installed kit numbers after installing the kits.

Controller Identification

Record the controller description from the generator set operation manual, spec sheet, or sales invoice.

Controller Description

Generator Set Identification Numbers

Record the product identification numbers from the generator set nameplate(s).

Model Designation

Specification Number

Serial Number

Accessory Number

 

Accessory Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Engine Identification

Record the product identification information from the engine nameplate.

Manufacturer

Model Designation

Serial Number

Table of Contents

Product Identification Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Safety Precautions and Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7

Introduction . . . . . . . . .

. . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11

Service Assistance . . .

. . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

Section 1 Descriptions and Service Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15

1.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15

1.2

Engine . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15

1.3

Generator Set Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15

1.4

Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15

1.5

Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15

1.6

Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15

1.7

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18

 

1.7.1

Carburetor Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18

 

1.7.2

Fuel Regulator Heater (20RESA and RESAL only) . . . . . . . . . . . . . . . . .

18

 

1.7.3

OnCue Home Generator Management System . . . . . . . . . . . . . . . . . . . .

18

 

1.7.4

Programmable Interface Module (PIM) . . . . . . . . . . . . . . . . . . . . . . . . . . .

18

 

1.7.5

Load Control Module (LCM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18

1.8

Service Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19

Section 2 Generator Set Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

2.1

Prestart Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

2.2

Exercising the Generator Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

2.3

Generator Set Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

 

2.3.1

Local Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

 

2.3.2

Automatic Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

 

2.3.3

Remote Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

 

2.3.4

Engine Start Crank Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

 

2.3.5

Engine Cooldown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21

 

2.3.6

Automatic Operation with Model RXT Transfer Switch . . . . . . . . . . . . . .

22

 

2.3.7

Automatic Operation with Model RDT or RSB Transfer Switches . . . . .

22

2.4

Exercise

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

23

 

2.4.1

Setting the Exerciser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

23

 

2.4.2

Unloaded Cycle Exercise with Complete System Diagnostics . . . . . . . .

23

 

2.4.3

Unloaded Full-Speed Exercise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

 

2.4.4

Loaded Full-Speed Exercise (with RXT only) . . . . . . . . . . . . . . . . . . . . . .

24

 

2.4.5

Power Failure During Exercise Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

2.5

Faults . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

 

2.5.1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

 

2.5.2

Shutdowns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

 

2.5.3

ATS Communication Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

 

2.5.4

Resetting the Controller after a Fault Shutdown . . . . . . . . . . . . . . . . . . . .

25

Section 3 RDC2 Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

29

3.1

RDC2 Generator Set/ Transfer Switch Controller . . . . . . . . . . . . . . . . . . . . . . . . . .

29

3.2

Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

29

 

3.2.1

Controller Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30

 

3.2.2

LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30

 

3.2.3

LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

31

3.3

Controller Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32

3.4

Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32

3.5

Changing Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32

3.6

Setting the Exerciser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

34

 

3.6.1

Setting the Exerciser at Controller Powerup . . . . . . . . . . . . . . . . . . . . . . .

34

 

3.6.2

Changing the Exercise Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

34

TP-6804 12/11

Table of Contents

Table of Contents, continued

3.7

RDC2 Controller Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36

3.8

Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36

3.9

Overview Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37

3.10

Engine Metering Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37

3.11

Generator Metering Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38

3.12

Generator Set Information Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

39

3.13

Genset Run Time Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

39

3.14

Genset System Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

40

3.15

ATS Status Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

41

3.16

ATS Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

42

3.17

Date and Time Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

43

3.18

Networking Information Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

43

 

3.18.1

Networking Status Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

44

 

3.18.2

Networking Configuration Submenu (OnCue Password) . . . . . . . . . . . .

45

 

3.18.3

RBUS Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

46

 

3.18.4

Remote Devices Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

47

3.19

Programmable Interface Module (PIM) Status Menu . . . . . . . . . . . . . . . . . . . . . . .

48

3.20

Load Control Module (LCM) Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

49

3.21

Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

50

Section 4 DC2 Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51

4.1

DC2 Generator Set/ Transfer Switch Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51

4.2

Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

51

 

4.2.1

Controller Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

52

 

4.2.2

LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

52

 

4.2.3

LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

53

4.3

Controller Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

53

4.4

Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

53

4.5

Exercise

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54

 

4.5.1

Exercise Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54

 

4.5.2

Setting the Exerciser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54

 

4.5.3

Exerciser Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54

4.6

Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54

4.7

Maintenance Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

55

4.8

OnCue Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

55

Section 5 Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

57

5.1

Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

57

 

5.1.1

Service Schedule, 14RESA/RESAL Models . . . . . . . . . . . . . . . . . . . . . .

58

 

5.1.2

Service Schedule, 20RESA/RESAL Models . . . . . . . . . . . . . . . . . . . . . .

59

5.2

Lubrication System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60

 

5.2.1

Low Oil Pressure Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60

 

5.2.2

Oil Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60

 

5.2.3

Engine Oil Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60

 

5.2.4

Oil Change Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60

 

5.2.5

Resetting the Maintenance Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

61

 

5.2.6

Oil Cooler 20RESA/RESAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

61

5.3

Spark Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

62

5.4

Air Cleaner Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

62

 

5.4.1

Air Cleaner, 14RESA/RESAL Models . . . . . . . . . . . . . . . . . . . . . . . . . . . .

62

 

5.4.2

Air Cleaner, 20RESA/RESAL Models . . . . . . . . . . . . . . . . . . . . . . . . . . . .

63

5.5

Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

64

5.6

Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

64

5.7

Battery .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

65

Table of Contents

TP-6804 12/11

Table of Contents, continued

5.8

Storage Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66

 

5.8.1

Lubricating System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66

 

5.8.2

Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66

 

5.8.3

Cylinder Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66

 

5.8.4

Exterior Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66

 

5.8.5

Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66

Section 6 Troubleshooting . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

6.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

6.2

Fault Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

6.3

Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

 

6.3.1

Controller Internal Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

 

6.3.2

Line Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

 

6.3.3

Auxiliary Winding Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

6.4

Controller Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

67

6.5

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

68

Appendix A Abbreviations . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

69

TP-6804 12/11

Table of Contents

Notes

6

TP-6804 12/11

Safety Precautions and Instructions

IMPORTANT SAFETY INSTRUCTIONS.

Electromechanical equipment, including generator sets, transfer switches, switchgear, and accessories, can cause bodily harm and pose life-threatening danger when improperly installed, operated, or maintained. To prevent accidents be aware of potential dangers and act safely. Read and follow all safety precautions and instructions. SAVE THESE INSTRUCTIONS.

This manual has several types of safety precautions and instructions: Danger, Warning, Caution, and Notice.

DANGER

Danger indicates the presence of a hazard that will cause severe personal injury, death, or substantial property damage.

WARNING

Warning indicates the presence of a hazard that can cause severe personal injury, death, or substantial property damage.

CAUTION

Caution indicates the presence of a hazard that will or can cause minor personal injury or property damage.

NOTICE

Notice communicates installation, operation, or maintenance information that is safety related but not hazard related.

Safety decals affixed to the equipment in prominent places alert the operator or service technician to potential hazards and explain how to act safely. The decals are shown throughout this publication to improve operator recognition. Replace missing or damaged decals.

Accidental Starting

WARNING

Accidental starting.

Can cause severe injury or death.

Disconnect the battery cables before working on the generator set. Remove the negative (--) lead first when disconnecting the battery. Reconnect the negative (--) lead last when reconnecting the battery.

Disabling the generator set. Accidental starting can cause severe injury or death. Before working on the generator set or equipment connected to the set, disable the generator set as follows:

(1)Press the generator set off/reset button to shut down the generator set.

(2)Disconnect the power to the battery charger, if equipped. (3) Remove the battery cables, negative (--) lead first. Reconnect the negative (--) lead last when reconnecting the battery. Follow these precautions to prevent the starting of the generator set by the remote start/stop switch.

Battery

WARNING

Sulfuric acid in batteries.

Can cause severe injury or death.

Wear protective goggles and clothing. Battery acid may cause blindness and burn skin.

WARNING

Explosion.

Can cause severe injury or death. Relays in the battery charger cause arcs or sparks.

Locate the battery in a well-ventilated area. Isolate the battery charger from explosive fumes.

Battery electrolyte is a diluted sulfuric acid. Battery acid can cause severe injury or death. Battery acid can cause blindness and burn skin. Always wear splashproof safety goggles, rubber gloves, and boots when servicing the battery. Do not open a sealed battery or mutilate the battery case. If battery acid splashes in the eyes or on the skin, immediately flush the affected area for 15 minutes with large quantities of clean water. Seek immediate medical aid in the case of eye contact. Never add acid to a battery after placing the battery in service, as this may result in hazardous spattering of battery acid.

Battery acid cleanup. Battery acid can cause severe injury or death.

Battery acid is electrically conductive and corrosive. Add 500 g (1 lb.) of bicarbonate of soda (baking soda) to a container with 4 L (1 gal.) of water and mix the neutralizing solution. Pour the neutralizing solution on the spilled battery acid and continue to add the neutralizing solution to the spilled battery acid until all evidence of a chemical reaction (foaming) has ceased. Flush the resulting liquid with water and dry the area.

TP-6804 12/11

Safety Precautions and Instructions

7

Battery gases. Explosion can cause severe injury or death. Battery gases can cause an explosion. Do not smoke or permit flames or sparks to occur near a battery at any time, particularly when it is charging. Do not dispose of a battery in a fire. To prevent burns and sparks that could cause an explosion, avoid touching the battery terminals with tools or other metal objects. Remove all jewelry before servicing the equipment. Discharge static electricity from your body before touching batteries by first touching a grounded metal surface away from the battery. To avoid sparks, do not disturb the battery charger connections while the battery is charging. Always turn the battery charger off before disconnecting the battery connections. Ventilate the compartments containing batteries to prevent accumulation of explosive gases.

Battery short circuits. Explosion can cause severe injury or death.

Short circuits can cause bodily injury and/or equipment damage. Disconnect the battery before generator set installation or maintenance. Remove all jewelry before servicing the equipment. Use tools with insulated handles. Remove the negative (--) lead first when disconnecting the battery. Reconnect the negative (--) lead last when reconnecting the battery. Never connect the negative (--) battery cable to the positive (+) connection terminal of the starter solenoid. Do not test the battery condition by shorting the terminals together.

Engine Backfire/Flash

Fire

WARNING

Fire.

Can cause severe injury or death.

Do not smoke or permit flames or sparks near fuels or the fuel system.

Servicing the air cleaner. A sudden backfire can cause severe injury or death. Do not operate the generator set with the air cleaner removed.

Servicing the fuel system. A flash fire can cause severe injury or death.

Do not smoke or permit flames or sparks near the carburetor, fuel line, fuel filter, fuel pump, or other potential sources of spilled fuels or fuel vapors. Catch fuels in an approved container when removing the fuel line or carburetor.

Combustible materials. A fire can cause severe injury or death.

Generator set engine fuels and fuel vapors are flammable and explosive. Handle these materials carefully to minimize the risk of fire or explosion. Equip the compartment or nearby area with a fully charged fire extinguisher. Select a fire extinguisher rated ABC or BC for electrical fires or as recommended by the local fire code or an authorized agency. Train all personnel on fire extinguisher operation and fire prevention procedures.

Exhaust System

WARNING

Carbon monoxide.

Can cause severe nausea, fainting, or death.

The exhaust system must be leakproof and routinely inspected.

Generator set operation. Carbon monoxide can cause severe nausea, fainting, or death. Carbon monoxide is an odorless, colorless, tasteless, nonirritating gas that can cause death if inhaled for even a short time. Avoid breathing exhaust fumes when working on or near the generator set. Never operate the generator set inside a building. Never operate the generator set where exhaust gas could seep inside or be drawn into a potentially occupied building through windows, air intake vents, or other openings.

Carbon monoxide detectors. Carbon monoxide can cause severe nausea, fainting, or death. Install carbon monoxide detectors on each level of any building adjacent to the generator set. Locate the detectors to adequately warn the building’s occupants of the presence of carbon monoxide. Keep the detectors operational at all times. Periodically test and replace the carbon monoxide detectors according to the manufacturer’s instructions.

Carbon monoxide symptoms. Carbon monoxide can cause severe nausea, fainting, or death. Carbon monoxide is a poisonous gas present in exhaust gases. Carbon monoxide is an odorless, colorless, tasteless, nonirritating gas that can cause death if inhaled for even a short time. Carbon monoxide poisoning symptoms include but are not limited to the following:

DLight-headedness, dizziness

DPhysical fatigue, weakness in joints and muscles

DSleepiness, mental fatigue, inability to concentrate

or speak clearly, blurred vision

DStomachache, vomiting, nausea If experiencing any of these symptoms and carbon monoxide poisoning is possible, seek fresh air immediately and remain active. Do not sit, lie down, or fall asleep. Alert others to the possibility of carbon monoxide poisoning. Seek medical attention if the condition of affected persons does not improve within minutes of breathing fresh air.

8

Safety Precautions and Instructions

TP-6804 12/11

Fuel System

Hazardous Noise

 

 

 

WARNING

 

CAUTION

 

 

Explosive fuel vapors.

Can cause severe injury or death.

Use extreme care when handling, storing, and using fuels.

The fuel system. Explosive fuel vapors can cause severe injury or death. Vaporized fuels are highly explosive. Use extreme care when handling and storing fuels. Store fuels in a well-ventilated area away from spark-producing equipment and out of the reach of children. Never add fuel to the tank while the engine is running because spilled fuel may ignite on contact with hot parts or from sparks. Do not smoke or permit flames or sparks to occur near sources of spilled fuel or fuel vapors. Keep the fuel lines and connections tight and in good condition. Do not replace flexible fuel lines with rigid lines. Use flexible sections to avoid fuel line breakage caused by vibration. Do not operate the generator set in the presence of fuel leaks, fuel accumulation, or sparks. Repair fuel systems before resuming generator set operation.

Gas fuel leaks. Explosive fuel vapors can cause severe injury or death. Fuel leakage can cause an explosion. Check the LP vapor gas or natural gas fuel system for leakage by using a soap and water solution with the fuel system test pressurized to 6--8 ounces per square inch (10--14 inches water column). Do not use a soap solution containing either ammonia or chlorine because both prevent bubble formation. Asuccessful test depends on the ability of the solution to bubble.

Hazardous noise.

Can cause hearing loss.

Never operate the generator set without a muffler or with a faulty exhaust system.

Engine noise. Hazardous noise can cause hearing loss. Generator sets not equipped with sound enclosures can produce noise levels greater than 105 dBA. Prolonged exposure to noise levels greater than 85 dBA can cause permanent hearing loss. Wear hearing protection when near an operating generator set.

Hazardous Voltage/

Moving Parts

DANGER

Hazardous voltage.

Will cause severe injury or death.

This equipment must be installed and serviced by qualified electrical personnel.

WARNING

Hazardous voltage. Moving parts. Can cause severe injury or death.

Operate the generator set only when all guards and electrical enclosures are in place.

WARNING

Hazardous voltage.

Backfeed to the utility system can cause property damage, severe injury, or death.

If the generator set is used for standby power, install an automatic transfer switch to prevent inadvertent interconnection of standby and normal sources of supply.

CAUTION

Welding the generator set.

Can cause severe electrical equipment damage.

Never weld components of the generator set without first disconnecting the battery, controller wiring harness, and engine electronic control module (ECM).

Grounding electrical equipment. Hazardous voltage can cause severe injury or death. Electrocution is possible whenever electricity is present. Ensure you comply with all applicable codes and standards. Electrically ground the generator set, transfer switch, and related equipment and electrical circuits. Turn off the main circuit breakers of all power sources before servicing the equipment. Never contact electrical leads or appliances when standing in water or on wet ground because these conditions increase the risk of electrocution.

TP-6804 12/11

Safety Precautions and Instructions

9

Welding on the generator set. Can cause severe electrical equipment damage. Before welding on the generator set perform the following steps: (1) Remove the battery cables, negative (--) lead first. (2) Disconnect all engine electronic control module (ECM) connectors. (3) Disconnect all generator set controller and voltage regulator circuit board connectors.

(4) Disconnect the engine batterycharging alternator connections.

(5) Attach the weld ground connection close to the weld location.

Connecting the battery and the battery charger. Hazardous voltage can cause severe injury or death.

Reconnect the battery correctly, positive to positive and negative to negative, to avoid electrical shock and damage to the battery charger and battery(ies). Have a qualified electrician install the battery(ies).

Short circuits. Hazardous voltage/current can cause severe injury or death. Short circuits can cause bodily injury and/or equipment damage. Do not contact electrical connections with tools or jewelry while making adjustments or repairs. Remove all jewelry before servicing the equipment.

Electrical backfeed to the utility. Hazardous backfeed voltage can cause severe injury or death. Install a transfer switch in standby power installations to prevent the connection of standby and other sources of power. Electrical backfeed into a utility electrical system can cause severe injury or death to utility personnel working on power lines.

Heavy Equipment

WARNING

Unbalanced weight.

Improper lifting can cause severe injury or death and equipment damage.

Do not use lifting eyes.

Lift the generator set using lifting bars inserted through the lifting holes on the skid.

Hot Parts

WARNING

Hot engine and exhaust system. Can cause severe injury or death.

Do not work on the generator set until it cools.

Servicing the exhaust system. Hot parts can cause severe injury or death. Do not touch hot engine parts. The engine and exhaust system components become extremely hot during operation.

Servicing the engine heater. Hot parts can cause minor personal injury or property damage. Install the heater before connecting it to power. Operating the heater before installation can cause burns and component damage. Disconnect power to the heater and allow it to cool before servicing the heater or nearby parts.

Notice

NOTICE

Canadian installations only. For standby service connect the output of the generator set to a suitably rated transfer switch in accordance with Canadian Electrical Code, Part 1.

10 Safety Precautions and Instructions

TP-6804 12/11

Introduction

This manual provides operation and maintenance instructions for residential/commercial model 14/20RESA and RESAL generator sets equipped with Kohler RDC2 or DC2 generator set/transfer switch controllers. See Figure 1. The RDC2 and DC2 controllers control the generator set and the optional Model RXT transfer switch.

This generator set is approved for use in stationary applications in locations served by a reliable utility power source. Have the generator set installed by an authorized distributor/dealer or service technician. Refer to TP-6803, Installation Manual, for installation instructions.

Information in this publication represents data available at the time of print. Kohler Co. reserves the right to change this publication and the products represented without notice and without any obligation or liability whatsoever.

Read this manual and carefully follow all procedures and safety precautions to ensure proper equipment operation and to avoid bodily injury. Read and follow the Safety Precautions and Instructions section at the beginning of this manual. Keep this manual with the equipment for future reference.

The equipment service requirements are very important to safe and efficient operation. Inspect the parts often and perform required service at the prescribed intervals. Obtain service from an authorized service distributor/ dealer to keep equipment in top condition.

List of Related Literature

Figure 2 identifies related literature available for the generator sets covered in this manual. Only trained and qualified personnel should install or service the generator set.

Literature Type

Part Number

 

 

Installation Manual, Model

 

14/20RESA/RESAL Generator Set

TP-6803

 

 

Operation/Installation Manual, Model

 

RXT Automatic Transfer Switch

TP-6807

 

 

Operation/Installation Manual, Model

 

RDT Automatic Transfer Switch

TP-6345

 

 

Installation Manual, Model RSB

 

Automatic Transfer Switch

TP-6486

 

 

Operation Manual, Model RSB

 

Automatic Transfer Switch

TP-6487

 

 

Service Manual, 14/20RESA/RESAL

 

Generator Set

TP-6735

 

 

Operation Manual, OnCuer Software

TP-6796

 

 

Operation Manual, SiteTecht Software

TP-6701

 

 

Installation Instructions, Load Control

 

Module (LCM)

TT-1574

 

 

Installation Instructions, Programmable

 

Interface Module (PIM)

TT-1584

Figure 2 Related Literature

Figure 1 RESA/RESAL Generator Set

TP-6804 12/11

Introduction 11

Nameplate

The following illustration shows a typical generator set nameplate. Copy the model, serial, and specification numbers from the nameplate into the spaces provided in the product information section on the inside front cover of this manual. See the service views in Section 1.8 for the nameplate location.

GM12070

Emission Information

The Kohlerr Model CH740 engine used on the 14RESA/RESAL generator set is certified to operate using natural gas or propane fuel.

The Kohler Model CH1000 engine used on the 20RESA/RESAL generator set is certified to operate using propane fuel. The CH1000 engine used on the 20RESA/RESAL may be operated on natural gas fuel because it is excluded from the requirements of 40 CFR 1048 as a stationary engine.

The engine used in the Model 20RESA/RESAL generator set is certified for emergency standby use only.

The Emission Compliance Period referred to on the Emission Control or Air Index label indicates the number of operating hours for which the engine has been shown to meet CARB or EPA emission requirements. Figure 3 provides the engine compliance period (in hours) associated with the category descriptor, which may be found on the certification label.

Emission Compliance Period

EPA

Category C

Category B

Category A

250 hours

500 hours

1000 hours

 

 

 

 

 

CARB

Moderate

Intermediate

Extended

125 hours

250 hours

500 hours

 

 

 

 

 

Figure 3 Emission Compliance Period

Refer to the certification label for engine displacement.

The exhaust emission control system for the CH740 engines (14RESA/RESAL) is EM for U.S. EPA, California, and Europe.

The exhaust emission control system for the CH1000 engine (20RESA/RESAL) is EM for U.S. EPA, California, and Europe.

12 Introduction

TP-6804 12/11

Service Assistance

For professional advice on generator set power requirements and conscientious service, please contact your nearest Kohler distributor or dealer.

DConsult the Yellow Pages under the heading Generators—Electric.

DVisit the Kohler Power Systems website at KohlerPower.com.

DLook at the labels and stickers on your Kohler product or review the appropriate literature or documents included with the product.

DCall toll free in the US and Canada 1-800-544-2444.

DOutside the US and Canada, call the nearest regional office.

Headquarters Europe, Middle East, Africa (EMEA)

Kohler Power Systems 3 rue de Brennus 93200 Saint Denis France

Phone: (33) 1 49 178300 Fax: (33) 1 49 178301

Asia Pacific

Power Systems Asia Pacific Regional Office Singapore, Republic of Singapore

Phone: (65) 6264-6422 Fax: (65) 6264-6455

China

North China Regional Office, Beijing

Phone: (86) 10 6518 7950

(86) 10 6518 7951

(86) 10 6518 7952

Fax: (86) 10 6518 7955

East China Regional Office, Shanghai

Phone: (86) 21 6288 0500

Fax: (86) 21 6288 0550

India, Bangladesh, Sri Lanka

India Regional Office

Bangalore, India

Phone: (91) 80 3366208

(91) 80 3366231

Fax: (91) 80 3315972

Japan, Korea

North Asia Regional Office

Tokyo, Japan

Phone: (813) 3440-4515

Fax: (813) 3440-2727

Latin America

Latin America Regional Office

Lakeland, Florida, USA

Phone: (863) 619-7568

Fax: (863) 701-7131

TP-6804 12/11

Service Assistance 13

Notes

14 Service Assistance

TP-6804 12/11

Section 1 Descriptions and Service Views

1.1 Introduction

The generator set specification sheets provide specific generator and engine information. Refer to the spec sheet for data not supplied in this manual. Consult the generator set service manual, engine operation manual, and engine service manual for additional specifications. Obtain copies of the latest spec sheets, manuals, diagrams, and drawings from your local distributor/ dealer.

1.2 Engine

The generator set has a four-cycle, twin cylinder, aircooled Kohlerr engine. The engine operates on cleanburning natural gas or propane (LP) vapor. Engine features include:

DEfficient overhead valve design and full pressure lubrication for maximum power, torque, and reliability under all operating conditions.

DDependable, maintenance-free electronic ignition.

DPrecision-formulated cast iron construction of parts subjected to the most wear and tear.

DField-convertible multi-fuel systems that allow fuel changeover from natural gas to LP vapor (and viceversa) while maintaining CARB emission certification.

DDigital spark advance optimizes ignition timing for the selected fuel.

1.3 Generator Set Enclosure

The generator set is housed in an exclusive engineered composite enclosure that is corrosion-proof, even in harsh seaside environments, and impact-resistant, even in cold weather. The enclosure has a hinged, locking roof that allows easy access to the generator set controller when required, but locks securely to prevent unauthorized access.

To open the roof, insert the tool provided with the enclosure and turn counterclockwise 1/4 turn. Then just raise the roof. The roof stays open until you are ready to close it.

Be sure to close and lock the enclosure, and keep the tool in a secure location.

1.4 Alternator

The generator uses Kohler’s unique PowerBoostt voltage regulation system, which provides instant response to load changes.

PowerBoostt ensures reliable motor starting and consistent voltage levels. PowerBoostt utilizes a voltage excitation system that employs a winding independent of the main output windings to provide excitation voltage.

1.5 Transfer Switch

The RDC2 and DC2 controllers are designed to interface with and control the Kohler Model RXT Automatic Transfer Switch (ATS). Do not use the Kohler Model RRT transfer switch with the RDC2 or DC2 controller.

If the power system uses a different model transfer switch, the RDC2 and DC2 controllers will not control the transfer switch. An ATS other than the Model RXT must be equipped with a transfer switch controller and engine start contacts that connect to the remote engine start terminals on the generator set.

1.6 Controllers

RESA models are equipped with the Residential Digital Control (RDC2). RESAL models use the Digital Control (DC2). See Figure 1-1.

The controller provides integrated control for the generator set, Kohlerr Model RXT transfer switch, programmable interface module (PIM), and load control module (LCM).

RDC2 (RESA)

DC2 (RESAL)

Figure 1-1 Controllers

TP-6804 12/11

Section 1 Descriptions and Service Views 15

The controller’s 2-line LCD screen displays status messages and system settings that are clear and easy to read, even in direct sunlight or low light.

RDC2 Controller Features

DSix-button keypad

d OFF, AUTO, and RUN pushbuttons

d Select and arrow buttons for access to system configuration and adjustment menus

DLED indicators for OFF, AUTO, and RUN modes

DLED indicators for utility power and generator set source availability and ATS position (Model RXT transfer switch required)

DLCD display

d Two lines x 16 characters per line

d Backlit display with adjustable contrast for excellent visibility in all lighting conditions

DScrolling system status display

d Generator set status d Voltage and frequency d Engine temperature

d Oil pressure

d Battery voltage

d Engine runtime hours

DDate and time displays

DSmart engine cooldown senses engine temperature

DDigital isochronous governor to maintain steady-state speed at all loads

DDigital voltage regulation: ±0.5% RMS no-load to full-load

DAutomatic start with programmed cranking cycle

DProgrammable exerciser can be set to start automatically on any future day and time, and run every week or every two weeks

DExercise modes

d Unloaded weekly exercise with complete system diagnostics

d Unloaded full-speed exercise

d Loaded full-speed exercise (Model RXT ATS required)

DFront-access mini USB connector for SiteTecht connection

DFront access mini-breaker protects the alternator

DIntegral Ethernet connector for Kohlerr OnCuet

DBuilt-in 2.5 amp battery charger

DRemote two-wire start/stop capability for optional connection of Model RDT or RSB transfer switches

DDiagnostic messages

d Displays diagnostic messages for the engine, generator, Model RXT transfer switch, programmable interface module (PIM), and load control module (LCM)

d Over 70 diagnostic messages can be displayed

DMaintenance reminders

DSystem settings

d System voltage, frequency, and phase d Voltage adjustment

d Measurement system, English or metric

DATS status (Model RXT ATS required)

d Source availability

d ATS position (normal/utility or emergency/generator)

d Source voltage and frequency

DATS control (Model RXT ATS required)

d Source voltage and frequency settings d Engine start time delay

d Transfer time delays d Voltage calibration

d Fixed pickup and dropout settings

DProgrammable Interface Module (PIM) status displays

d Input status (active/inactive) d Output status (active/inactive)

DLoad control module (LCM) menus

d Load status d Test function

16 Section 1 Descriptions and Service Views

TP-6804 12/11

DC2 Controller Features

DFour-button keypad: OFF, AUTO, RUN, and EXERCISE pushbuttons

DLED indicators for OFF, AUTO, and RUN modes

DLCD display:

d Two lines x 16 characters per line

d Backlit display with adjustable contrast for excellent visibility

DScrolling system status display

d Generator set status d Voltage and frequency d Engine temperature

d Oil pressure

d Battery voltage

d Engine runtime hours d Maintenance reminders

d OnCue status (connected/disconnected)

DDate and time displays

DSmart engine cooldown senses engine temperature

DDigital isochronous governor to maintain steady-state speed at all loads

DDigital voltage regulation: ±0.5% RMS no-load to full-load

DAutomatic start with programmed cranking cycle

DExercise modes

d Unloaded weekly exercise with complete system diagnostics

d Unloaded full-speed exercise

d Loaded full-speed exercise (Model RXT ATS required)

DFront-access mini USB connector for SiteTecht connection

DFront access mini-breaker protects the alternator

DIntegral Ethernet connector for Kohlerr OnCuet

DBuilt-in 2.5 amp battery charger

DRemote two-wire start/stop capability for optional connection of Model RDT or RSB transfer switches

DDiagnostic messages

d Displays diagnostic messages for the engine, generator set, model RXT transfer switch, and optional programmable interface module (PIM) and load control module (LCM)

d Over 70 diagnostic messages can be displayed

DA laptop computer and Kohlerr SiteTech software can be used to change system settings or upgrade controller firmware.

TP-6804 12/11

Section 1 Descriptions and Service Views 17

1.7 Accessories

The following optional accessories are offered for the RESA and RESAL generator sets.

1.7.1Carburetor Heater

An optional carburetor heater is recommended for improved cold starting in locations where the ambient temperature drops below 0_C (32_F). The carburetor heater prevents condensation and carburetor icing. The heater requires a continuous source of 120 VAC power.

See the generator set Installation manual for more information.

1.7.2Fuel Regulator Heater (20RESA and RESAL only)

An optional fuel regulator heater for the 20RESA/20RESAL is recommended for improved cold starting in locations where the ambient temperature drops below --18_C (0_F). The heater requires a continuous source of 120 VAC power.

See the generator set Installation manual for more information.

1.7.3OnCue Home Generator Management System

The Kohlerr OnCuet Home Generator Management System allows monitoring and control of your RESA or RESAL generator set from a personal computer located in your home or at other remote locations. OnCuet can also be configured to send email or text message notifications in the event of a generator set fault.

Note: Be sure to obtain the correct version of the OnCuet kit for the RDC2/DC2 controller.

OnCuet version 3.0 is required for RESA/RESAL generator sets equipped with the RDC2/DC2 controller. OnCuet versions numbered 1.x are not compatible with the RDC2/DC2 controller.

1.7.4Programmable Interface Module (PIM)

The optional Programmable Interface Module (PIM) provides two programmable inputs and six programmable dry contact outputs for connection to customer-supplied equipment. The outputs are controlled by the RDC2 controller, and can also be controlled remotely using the OnCue program.

The PIM is mounted in a NEMA 3R aluminum enclosure, which can be mounted indoors or outdoors. See the installation instructions provided with the PIM.

1.7.5Load Control Module (LCM)

The optional Load Control Module (LCM) provides an automatic load management system to comply with Section 702.5 of NEC 2008. The installer is responsible for ensuring that the power system installation complies with all applicable state and local codes.

The LCM automatically manages up to six residential loads. Four power relays are provided for management of non-essential secondary loads, and two relays are available to control two independent air conditioner loads.

The LCM is controlled by the RDC2/DC2 controller. The load on the generator set is monitored, and loads are added or shed in the order of their priority. See specification sheet G6-120 and the LCM installation instructions for more information.

18 Section 1 Descriptions and Service Views

TP-6804 12/11

Kohler 14-20RESAL, 14-20RESA User Manual

1.8 Service Views

2

1

4

10

26

1.Hinged inner cover

2.Hinged roof

3.Air intake

4.Lock

5.Locking tool, provided with generator set

6.Exhaust outlet

7.Oil check (dipstick)

8.Oil fill

9.Lifting holes

10.Muffler

11.Air cleaner

12.Oil filter

13.Line circuit breaker

14.USB connector (for firmware updates)

5

8

7

6

3

9

11 12

13 14 15

16, 17

18

19

 

 

AIR INTAKE SIDE --PANEL

 

 

REMOVED TO SHOW DETAIL

 

 

20

 

 

21

25

 

22

23

 

24

ADV-8424

15.RDC2 or DC2 controller

16.Field-connection terminal block (behind panel)

17.Digital spark advance ignition (DSAI) leads

18.Fuel block (14 kW models) or LP orifice location (20 kW models, inside hose fitting)

19.Fuel inlet

20.Fuel solenoid valve

21.Gas regulator assembly

22.120 VAC receptacles for optional carburetor heater (not shown)

23.Engine starting battery location (battery purchasd separately)

24.Oil drain hose

25.Nameplate location

26.Oil drain valve

Figure 1-2 Service View (Model 20RESA shown)

TP-6804 12/11

Section 1 Descriptions and Service Views 19

Notes

20 Section 1 Descriptions and Service Views

TP-6804 12/11

Section 2 Generator Set Operation

2.1 Prestart Checklist

To ensure continued satisfactory operation, perform the following checks or inspections before or at each startup, as designated, and at the intervals specified in the service schedule. In addition, some checks require verification after the unit starts.

Air Cleaner. Check for a clean and installed air cleaner element to prevent unfiltered air from entering the engine.

Air Inlets. Check for clean and unobstructed air inlets.

Battery. Check for tight battery connections. Consult the battery manufacturer’s instructions regarding battery care and maintenance.

Exhaust System. Check for exhaust leaks and blockages. Check the muffler condition.

DInspect the exhaust system components for cracks, leaks, and corrosion. Check for tight exhaust system connections.

DCheck for corroded or broken metal parts and replace them as needed.

DCheck that the exhaust outlet is unobstructed.

Oil Level. Check the oil level before starting the generator set and at the intervals given in Section 5, Scheduled Maintenance. Maintain the oil level at or near, not over, the full mark on the dipstick.

Operating Area. Check for obstructions that could block the flow of cooling air. Keep the air intake area clean. Do not leave rags, tools, or debris on or near the generator set.

2.2 Exercising the Generator Set

Operate the generator set without load once each week for 20 minutes. See Section 2.4 for information about loaded and unloaded exercise modes. For instructions to set the exerciser, see:

DSection 3.6 for the RDC2 controller

DSection 4.5 for the DC2 controller

2.3 Generator Set Operation

2.3.1Local Starting and Stopping

Start: Press the RUN button to immediately start the generator set.

Stop: Press the OFF button. The engine stops.

Run the generator set with no load for at least 2 minutes to ensure adequate engine cooldown.

2.3.2Automatic Starting and Stopping

An automatic transfer switch monitors the utility power and signals the generator set to start when utility power is lost. The ATS then transfers the load to the generator set.

When utility power is restored, the transfer switch transfers the load back to utility, runs the generator set with no load to cool down the engine, and then stops the generator set.

2.3.3Remote Starting and Stopping

A remote switch connected to terminals 3 and 4 can be used to start and stop the generator set. Close the switch to start and run the generator set. Open the switch to stop the generator set.

Run the generator set with no load for at least 2 minutes to ensure adequate engine cooldown.

2.3.4Engine Start Crank Cycle

The controller attempts to start the generator set three times (three crank cycles, 15 seconds crank and 15 seconds off). If the generator set does not start in three attempts, the system shuts down on an overcrank fault. See Section 2.5.

Cranking 1, 2, and 3 are displayed during the crank cycle. Pressing the OFF button during the crank cycle stops the cranking. No other buttons are acknowledged during the crank cycle.

2.3.5Engine Cooldown

The engine cooldown time delay allows the engine to run after the loads have been removed.

The engine cooldown time delay is set to 5 minutes. The engine stops before the cooldown time delay expires if the temperature drops below the cooled-down

TP-6804 12/11

Section 2 Generator Set Operation 21

temperature level, or if the temperature rises above the high limit during the cooldown cycle.

If a transfer switch other than the Model RXT is used, an additional engine cooldown time delay may be programmed on the transfer switch. To allow the smart engine cooldown on the RDC2 controller to operate most efficiently, set the cooldown time on the transfer switch controller to zero or the minimum time allowed. Refer to the instructions provided with the transfer switch for more information.

2.3.6Automatic Operation with Model RXT Transfer Switch

The Model RXT transfer switch connects to the RDC2 controller through the ATS interface board on the transfer switch. Also see the Model RXT Transfer Switch Operation/Installation Manual for more information about transfer switch operation.

The controller must be in AUTO mode for automatic transfer switch operation.

Automatic Start

The RDC2 controller receives utility source voltage sensing data from the Model RXT transfer switch.

1.If the utility source voltage falls below an acceptable level, the controller starts the engine start time delay.

2.If the utility source is not restored before the time delay expires, the generator set starts.

3.After the Normal-to-Emergency time delay, the ATS is signaled to transfer the load to the emergency source.

Automatic Stop with Engine Cooldown

1.When the utility source is restored, the Emergency-to-Normal time delay starts.

2.When the Emergency-to-Normal time delay expires, the load is transferred to the utility.

3.The generator set runs through the engine cooldown cycle and then stops.

2.3.7Automatic Operation with Model RDT or RSB Transfer Switches

If a Kohler Model RDT or RSB transfer switch is used, the engine start contacts from the ATS must be connected to engine start leads 3 and 4 on the generator set.

The controller must be in AUTO mode to respond to remote start/stop signals from an ATS or remote switch. Press the AUTO button to put the controller into automatic mode.

Automatic Start

The engine start contacts on the ATS close to signal the generator set to start, and remain closed while the generator set is running.

Automatic Stop

The engine start contacts on the ATS open to signal the generator set to stop.

22 Section 2 Generator Set Operation

TP-6804 12/11

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