Field Connections - Kohler 26RCA Installation Manual

3.1.4

Field Connections

Customer connection points are located as shown in Figure 24. Open the enclosure roof and locate the cover panel over the
circuit breaker. Remove the cover panel to access the power and load connections.
Remove the air intake end panel for access to the engine start and communication connections to the transfer switch. See the
ATS and Accessory Communication Connections section for more details about the transfer switch connections.
Route AC leads through flexible conduit. Ensure that the leads and conduit do not interfere with the operation of the generator
set or obstruct the service areas. Route low-voltage communication leads through separate conduit.
Before connecting utility power to the generator or connecting the battery, connect the RXT transfer switch and any
RBUS accessories to the generator set terminal block (A, B, PWR, and COM).
Procedure
1. Punch or drill holes for the conduit fittings. See the figure titled: Electrical Lead Entry Locations for the recommended
electrical inlet locations. Feed the cables through the openings.
2. Connect the leads from the transfer switch emergency source lugs to the L1, L2, and L3 connections on the load circuit
breaker as applicable for single or three-phase applications. See Figure 24.
3. Connect the neutral (L0) and ground (GRD) leads from the ATS and the main panel to the corresponding connection
points near the circuit breaker. See Figure 24. Also see the Grounding section.
4. Connect AC power source leads to the terminal block connections labeled HOT, NEUTRAL and GROUND. Connect
to a circuit that is fed by the load side of the transfer switch to ensure that battery charging power is available
at all times. See the AC Power Supply section for more information about the AC power requirement.
Note:
To maintain the charge on the engine starting battery, AC power must be connected to a circuit that is fed by the load
side of the transfer switch so that it is backed up by the generator.
5. Connect a model RXT, RDT, or other transfer switch to the terminal block in the air intake area. See Figure 24 and the
Transfer Switch Connection section.
6. For connection of optional accessories, including the programmable interface module (PIM), and/or a load shed kit, see
the Transfer Switch Connection section.
Note:
Connect the shield on the outside of the accessory communication cable to the ground lug near the terminal block
(item 6 in Figure 24).
®
7. If the OnCue Plus Generator Management System will be used with the generator set, choose a hard-wired or wireless
connection.
•
For wireless connection, obtain the OnCue Plus Wireless Kit and follow the instructions provided with the kit.
•
For a hard-wired connection, follow these steps to run category 5E network cable from the generator set to
the customer's router or modem.
a. Route the network cable with other low-voltage signal wiring (for example, the RBUS communication leads or
engine start leads to the transfer switch), in separate conduit from the AC load leads. If the network cable is
longer than 100 meters (328 ft.), use a repeater or switch.
b. Use an RJ45 inline coupler to connect the Ethernet cable to the cable in the customer connection box. See
Figure 24. The inline coupler is included with the OnCue Plus kit.
As an alternative, the Ethernet cable can be connected directly to Ethernet connector P6 on the back of the
RDC2 controller.
8. When connections are complete, replace the cover plate.
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