Format: PDF (Printable Document)
File Language: English
File Pages: 43
File Size: 0.64 MB (Speed Download Link)
Brand: Kohler
Model: MMS, MNS, MMT, MNT Automatic Transfer Switches
Book No: tp5662
Type of Document: Operation and Installation Manual
$ 40
In a standby power setup—like a commercial building or small plant—these Kohler MMS, MNS, MMT, and MNT automatic transfer switches sit between utility and generator, quietly deciding where your load gets its power. This manual helps you install, wire, set up, and operate those switches so they transfer cleanly and reliably. On a call where the generator starts but the building never picks up the load, I’d use this document to verify control wiring, check settings, and confirm we’re using the switch the way Kohler intended.
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 wiring diagrams and search terms while standing at the switch.
Q: Should I still print parts of it?
A: Many techs print the key wiring pages or procedures to mark notes, tape near the gear, and avoid handling a device with dirty gloves.
Safety Note
Always isolate all power sources and verify they are de-energized before opening or working inside the transfer switch.
Safety Precautions and Instructions . . . . . . . . . I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
List of Related Materials . . . . . . . . . . . . . . . . . . . . . . . . . . i
Service Assistance . . . . . . . . . . . . . . . . . . . . . . . . . ii
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Section 1 Specifications . . . . . . . . . . . . . . . . . . . . 1
1.1 Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Section 2 Operation . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Controls and Indicators . . . . . . . . . . . . . . . . . . . . . 4
2.3 Manual Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Automatic Operation . . . . . . . . . . . . . . . . . . . . . . . 4
2.4.1 Normal Power Source Failure . . . . . . . . 4
2.4.2 Normal Power Source Restoration . . . . 5
2.5 Programmed Transition Switch . . . . . . . . . . . . . . 6
2.5.1 Normal Power Source Failure . . . . . . . . 6
2.5.2 Normal Power Source Restoration . . . . 6
Section 3 Accessories . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Typical Mounting Locations . . . . . . . . . . . . . . . . . 8
3.2 DA-23—Plant Exerciser . . . . . . . . . . . . . . . . . . . . . 9
3.2.1 Clock Resetting Procedure . . . . . . . . . . 10
3.2.2 Initial Setup (Time and Day) Procedure
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.3 Plant Exercise and Shutdown Timers
Programming Procedure . . . . . . . . . . . . 10
3.2.4 Time Resetting Procedure . . . . . . . . . . . 11
3.2.5 Reviewing the Program . . . . . . . . . . . . . 11
3.2.6 Modifying an Existing Program . . . . . . . 11
3.2.7 Manual Override Procedure . . . . . . . . . 11
3.2.8 Continuous Manual Operation . . . . . . . 11
3.2.9 Ending Continuous Manual Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 DA-24—Battery Charger . . . . . . . . . . . . . . . . . . . . 12
3.3.1 Specifications . . . . . . . . . . . . . . . . . . . . . 12
3.3.2 Installation Connections . . . . . . . . . . . . 13
3.3.3 Disconnecting the Charger Before
Replacing or Servicing the Battery . . . . 14
3.3.4 Reconnecting the Charger After
Replacing or Servicing the Battery . . . . 14
3.3.5 Charging Lead-Acid Batteries . . . . . . . . 15
3.3.6 Charging Nickel-Cadmium Batteries . . 15
3.3.7 Charger Voltage Adjustment . . . . . . . . . 15
3.3.8 Charger and Battery Maintenance . . . . 15
3.4 DA-26—3-Phase Sensing . . . . . . . . . . . . . . . . . . . 16
Section 4 Scheduled Maintenance . . . . . . . . . . . 17
4.1 Inspection and Service . . . . . . . . . . . . . . . . . . . . . 18
4.1.1 General Inspection . . . . . . . . . . . . . . . . . 18
4.1.2 Other Inspections and Service . . . . . . . 19
4.2 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2.1 Weekly Generator Set Exercise . . . . . . 19
4.2.2 Monthly Automatic Operation Test . . . . 19
4.3 Service Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Section 5 Installation . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Receipt of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.2 Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1.4 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2 Mechanical Installation . . . . . . . . . . . . . . . . . . . . . 22
5.3 Check Manual Operation . . . . . . . . . . . . . . . . . . . . 22
5.4 Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.4.1 AC Power Connections . . . . . . . . . . . . . 23
5.4.2 Controller Logic . . . . . . . . . . . . . . . . . . . . 24
5.4.3 Accessory and Control Connections . . 24
5.5 Generator Set Preparation . . . . . . . . . . . . . . . . . . 25
5.6 Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.6.1 Voltage Check . . . . . . . . . . . . . . . . . . . . . 25
5.6.2 Automatic Operation Test . . . . . . . . . . . 26
5.7 Controller Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.8 Programmed Transition Setup . . . . . . . . . . . . . . . 28
5.8.1 Description . . . . . . . . . . . . . . . . . . . . . . . . 28
5.8.2 Timing Adjustment for Programmed
Transition . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.9 Ensure Warranty Registration . . . . . . . . . . . . . . . . 29
Appendix A Abbreviations . . . . . . . . . . . . . . . . A-1
