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Home›Repair guides›Kohler›Paralleling System Setup

Kohler — Paralleling System Setup

Installation · Decision-Makerr 3500 controller / paralleling system

From a Kohler service manual covering: 125REZGT, 145REOZT4, 175REOZT4, 30REZG, 35 REOZT4, 45 REOZT4, 50REZG, 55REOZT4, 70REZGT, GM88594-KP1-QS, REOZT4. Check it applies to your exact model before use.

Applies to: Kohler 125REZGT, Kohler 145REOZT4, Kohler 175REOZT4, Kohler 30REZG, Kohler 35 REOZT4, Kohler 45 REOZT4, Kohler 50REZG, Kohler 55REOZT4, Kohler 70REZGT

Before you start

  • Generator management must be disabled manually at each generator set controller.

Procedure

  1. Check that the voltage selector switch and/or alternator wiring matches the building voltage configuration for all generator sets.
  2. Set the digital output to Contactor (SiteTech Programmable Digital Output 116).
  3. Set reactive droop to 0.5-2% (default 1%), using the same reactive droop setting on all generators.
  4. Set the target voltage on all paralleled generators to the same value.
  5. Set engine speed adjustment to 50 on all generators (default 50; range 40-60).
  6. Verify metering; if voltage is incorrect, use the calibration procedure.
  7. Set Sync Mode in AUTO to ACTIVE and Sync Mode in Run to CHECK on all generators.
  8. Set Generator Management Enabled to OFF at each generator unless generator management is requested.
  9. Set up load management (load shed priorities) for non-critical loads.
  10. Stop all generators by pressing the OFF button on each controller.

Tools required

  • Personal computer with SiteTech software Amazon

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • Reactive droop 0.5 - 2% (default 1%)
  • Engine speed adjustment 50 (range 40-60)

Full service-parts list: Kohler 125REZGT →, Kohler 145REOZT4 →, Kohler 175REOZT4 →, Kohler 30REZG →, Kohler 35 REOZT4 →, Kohler 45 REOZT4 →, Kohler 50REZG →, Kohler 55REOZT4 →, Kohler 70REZGT →

Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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