Full Product Manual

TP-7092 4/23 25
1.8.9 PowerSync Automatic Paralleling Module (APM)
The PowerSync
®
Automatic Paralleling Module (APM) allows the use of two Model 14RCA/L or two 20RCA/L or 26RCA/L
generator sets in a single-phase paralleling system to supply power to one building or site. See Figure 18.
The APM provides a common connection point for paralleling generators and permits individual control of the generator
connections, allowing for synchronization, redundancy, and generator management.
Automatic paralleling requires:
1. Two single-phase generator sets. The generator sets must be the same size (kW) and model.
2. APM RDC2.4 paralleling firmware for the blue-board controller on each generator set. Download the latest version of
paralleling firmware from the Service Support section of the Kohler Power Resource Center (KPRC).
3. One Model RXT automatic transfer switch (ATS).
4. One Automatic Paralleling Module (APM) kit.
5. A personal computer (laptop) with Kohler
®
SiteTech™ software is required for system setup.
6. A load management device is required if one generator set cannot support the maximum total load. The load
management device (load shed kit or RXT combined interface/ load management board) is necessary in order to shed
non-critical loads in the event that one generator set shuts down and the other generator set cannot support all of the
loads.
See TT-1596, provided with the APM, for complete installation instructions. The APM and associated equipment must be
installed by a Kohler
®
trained and authorized dealer.
If the APM is not installed within sight of the generator sets, local codes may require the installation of circuit breakers near the
APM. Circuit breaker kits are available for installation inside the APM enclosure. See TT-1596 for the circuit breaker kit numbers.
Figure 18 PowerSync
®
Automatic Paralleling Module
1.8.10 Programmable 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
®
Plus 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.
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