Format: PDF (Printable Document)
File Language: English
File Pages: 58
File Size: 1.38 MB (Speed Download Link)
Brand: Kohler
Model: S340 Logic Board Automatic Transfer Switches
Book No: tp5612
Type of Document: Service Manual
$ 40
These Kohler HK/HKN transfer switches sit between utility power and a standby generator, usually in commercial buildings, small plants, or critical facilities where downtime is expensive. This manual is what I’d keep on the bench when I’m tracing why a switch won’t transfer, transfers late, or chatters under load. It walks you through how the R33 logic is supposed to behave so you can compare actual readings and indications to normal operation before you start swapping out parts.
Applications & Use Cases
FAQ
Q: Can I keep this manual on a tablet in the field?
A: Yes, it’s practical to use digitally so you can zoom diagrams and search terms while standing at the switchboard.
Q: Is it worth printing parts of it?
A: Many techs print the key procedures and keep them in a job folder so they can mark notes and keep greasy hands off their devices.
Safety Note
Always lockout/tagout both utility and generator sources before opening or working inside the transfer switch.
SUBJECT PAGE SUBJECT PAGE
Safety Precautions and Instructions . . . . . . . I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV
Glossary of Abbreviations . . . . . . . . . . . . . . . . V
Service Assistance . . . . . . . . . . . . . . . . . . . . . . . VII
Transfer Switch Model Number
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VIII
Section 1. Specifications . . . . . . . . . . . . . . . . . . 1-1
Automatic Transfer Switch Function . . . . . . . . 1-1
Manual (Nonautomatic) Transfer Switch
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Standard Accessories . . . . . . . . . . . . . . . . . . . . 1-5
Optional Accessories . . . . . . . . . . . . . . . . . . . . 1-5
Using Standby Power . . . . . . . . . . . . . . . . . . . . 1-6
Managing Power Demands . . . . . . . . . . . . . 1-6
Wattage Requirements . . . . . . . . . . . . . . . . . 1-6
Section 2. Operation . . . . . . . . . . . . . . . . . . . . . . 2-1
Automatic Transfer Switch . . . . . . . . . . . . . . . . 2-2
Nonautomatic Transfer Switch . . . . . . . . . . . . 2-2
Auto/Manual Switch And
Manual NE And EN Switch . . . . . . . . . . . . . 2-2
Pilot Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Optional Accessories . . . . . . . . . . . . . . . . . . . . 2-3
Momentary Test Switch (HKA-06-F) . . . . . . 2-3
Plant Exerciser (HKA-23-C) . . . . . . . . . . . . . 2-3
Battery Charger (HKA-24) . . . . . . . . . . . . . . 2-4
Voltage Surge Withstand Protection
(HKA-38-A) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Section 3. Operation and Installation
of Optional Accessories . . . . . . . . . . . . . . . . . . 3-1
Momentary Test Switch (HKA-06-F) . . . . . . . . 3-1
12-Hour Plant Exerciser (HKA-23-C) . . . . . . . 3-3
12- or 24-Volt Battery Charger (HKA-24-64A)
(HKA-24-64B), (HKA-24-63A), (HKA-24-63B) 3-6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Mount Charger . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Output Connections . . . . . . . . . . . . . . . . . . . . . 3-9
Input Connections . . . . . . . . . . . . . . . . . . . . . . . 3-9
To Disconnect Charger
(When Replacing or Servicing Battery) . . . . . 3-11
Battery Charger Operation . . . . . . . . . . . . . . . . 3-11
Charging Lead-Acid Batteries . . . . . . . . . . . 3-11
Checking Specific Gravity
(Lead-Acid Batteries) . . . . . . . . . . . . . . . . . . . . 3-12
Charging Nickel-Cadmium Batteries . . . . . . . . 3-13
Charger Voltage Adjustment . . . . . . . . . . . . . . 3-13
Charger and Battery Maintenance . . . . . . . . . 3-13
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Standard Accessories . . . . . . . . . . . . . . . . . . . . 3-14
Current Limiting . . . . . . . . . . . . . . . . . . . . . . . 3-14
Reverse Polarity Protection . . . . . . . . . . . . . 3-14
Automatic Float Operation . . . . . . . . . . . . . . 3-14
Temperature Compensation . . . . . . . . . . . . 3-14
AC Input Fuse . . . . . . . . . . . . . . . . . . . . . . . . 3-14
DC Output Fuse . . . . . . . . . . . . . . . . . . . . . . 3-14
Power On Lamp . . . . . . . . . . . . . . . . . . . . . . 3-14
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Battery Charger
240 Volt AC (HKA-24-D)
220 Volt AC (HKA-24-G) . . . . . . . . . . . . . . . . . 3-21
Information Prior To
Charging Battery . . . . . . . . . . . . . . . . . . . . . . 3-23
To Connect/Disconnect Charger . . . . . . . . . 3-23
Voltage Control . . . . . . . . . . . . . . . . . . . . . . . 3-24
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 3-25
Voltage Surge Withstand Protection/
(HKA-38-A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
Section 4. General Maintenance . . . . . . . . . . . 4-1
Section 5. Testing and Troubleshooting . . . . 5-1
Sequence Of Operation . . . . . . . . . . . . . . . . . . 5-1
Automatic Transfer Switch . . . . . . . . . . . . . . 5-1
Manual (Nonautomatic) Transfer Switch . . 5-1
Functional Test . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Manual Operation . . . . . . . . . . . . . . . . . . . . . 5-2
Electrical Operation . . . . . . . . . . . . . . . . . . . . 5-3
Disconnecting The Inner Control
Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
To Disconnect The P1 Plug . . . . . . . . . . . . . 5-4
To Reconnect The P1 Plug . . . . . . . . . . . . . 5-5
Manual Load Transfer . . . . . . . . . . . . . . . . . . . . 5-5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Troubleshooting Flowchart . . . . . . . . . . . . . . . . 5-7
Section 6. Wiring Diagrams . . . . . . . . . . . . . . . 6-1
Section 7. Installation of Transfer Switch . . . 7-1
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Line Connections . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Auxiliary Connections . . . . . . . . . . . . . . . . . . . . 7-2
Section 8. Installation Drawings . . . . . . . . . . . 8-1
