Kohler M340 Automatic Transfer Switches Installation Manual (tp5460)

In a facility or commercial building, the M340 automatic transfer switch is what quietly moves your load between utility and generator power when the grid drops. This installation manual is what I keep on hand when I’m mounting a new switch, tying it into the service, and verifying it will actually transfer cleanly under load. If I run into nuisance trips or the switch hesitates to transfer after a generator start, I’ll go back to this document to trace wiring, confirm terminations, and check that the installation matches Kohler’s requirements.

Applications & Use Cases

• Plan and verify mounting so the switch is supported, level, and accessible for future service.
• Route and land line/load conductors correctly, reducing the chance of mis-phasing or loose terminations.
• Connect control and auxiliary wiring so the switch talks properly with the generator and any remote signals.
• Confirm ratings and clearances match the site’s service and environmental conditions.
• Use as a reference on retrofits to compare an older field install against current installation practices.

FAQ

Q: Can I keep this manual on a tablet while I’m installing the switch?

A: Yes, it’s practical to use digitally; you can zoom in on diagrams and keep it clean in electrical rooms.

Q: Is it worth printing a copy for the jobsite?

A: I usually print key pages so I can mark notes, tape them near the gear, and leave a copy in the switch enclosure.

Safety Note

Always isolate all power sources, lock out, and verify zero energy before opening or working inside the transfer switch.

Kohler M340 Automatic Transfer Switches Index:

Safety Precautions and Instructions
Ratings

Installation
Unpacking
Lifting
Mounting
Line Connections
Auxiliary Connections
Engine Starting Connections

Functional Tests
Manual Operation Check
Voltage Checks
Electrical Operation Test

Initializing the Control
Setting the Time and Date
Checking Installed Control Options
Time Delays
Normal and Emergency System Setpoints
Plant Exerciser Settings
Load Shed Settings

Communications Settings

Remote Communication Requirements

Wiring Diagrams and Drawings
Interconnection Diagrams
Enclosure Dimensions
Contactor Wiring
Schematic

Kohler