Kohler 20EFOZ/24EOZ, 8.5EFOZ, 9EFOZ/10EOZ Circuit Breaker Installation 27EFOZ and 5--32EOZ Models

Disabling the generator set. Accidental starting can cause severe injury or death. Before working on the generator set or equipment connected to the set, disable the generator set as follows: (1) Place the generator set start/stop switch in the STOP position. (2) Disconnect the power to the battery charger, if equipped. (3) Remove the battery cables, negative (--) lead first. Reconnect the negative (--) lead last when reconnecting the battery. Follow these precautions to prevent the starting of the generator set by the remote start/stop switch.

WARNING

Hazardous voltage. Moving rotor.

Can cause severe injury or death.

Operate the generator set only when all guards and electrical enclosures are in place.

Grounding electrical equipment. Hazardous voltage can cause severe injury or death. Electrocution is possible whenever electricity is present. Open the main circuit breakers of all power sources before servicing the equipment. Configure the installation to electrically ground the generator set, transfer switch, and related equipment and electrical circuits to comply with applicable codes and standards. Never contact electrical leads or appliances when standing in water or on wet ground because these conditions increase the risk of electrocution.

Short circuits. Hazardous voltage/current can cause severe injury or death. Short circuits can cause bodily injury and/or equipment damage. Do not contact electrical connections with tools or jewelry while making adjustments or repairs. Remove all jewelry before servicing the equipment.

Electrical backfeed to the utility. Hazardous backfeed voltage can cause severe injury or death. Connect the generator set to the building/marina electrical system only through an approved device and after the building/marina main switch is opened. Backfeed connections can cause severe injury or death to utility personnel working on power lines and/or personnel near the work area. Some states and localities prohibit unauthorized connection to the utility electrical system. Install a ship-to-shore transfer switch to prevent interconnection of the generator set power and shore power.

6.2.2Circuit Breaker Installation

(4--27EFOZ and 5--32EOZ Models)

1.Place the generator set start/stop switch in the STOP position.

2.Disconnect the generator set engine starting battery, negative (--) lead first.

3.Remove the controller cover screws and remove the access cover.

4.Remove the screws and nuts to remove the circuit breaker cover plate. Save the mounting hardware.

5.Install the circuit breaker from the inside of the cutout panel and mount it using existing screws removed in step 4. Position the circuit breaker with the ON in the normal upright position or to the left side. Cover the cutout opening, if applicable, with the circuit breaker cover plate. Use existing screws to mount the cover plate.

6.See Section 8 for voltage reconnection.

Note: Kohlerr marine diesel generator sets are fully frequency adjustable and voltage reconnectable. To determine reconnection options, check the model’s specification sheet.

7.Install insulation boots over stator lead terminals if the kit includes insulation boots.

Note: See Section 8 for wiring instructions.

8.Make the recommended connections for the following four reconnection systems using circuit breakers:

Two-pole circuit breaker with a single-voltage system (example: 120-volt, 3-wire). Attach stator leads marked 2 and 4 to the side of the circuit breaker marked LINE. Install the jumper lead across the LINE side of circuit breaker terminals (see Section 8). Attach stator leads 1 and 3 to L0.

Single-pole circuit breaker with a 120-volt, 2-wire, single-voltage system. Attach stator leads marked 2 and 4 to the side of the circuit breaker marked LINE (see Section 8). Attach stator leads 1 and 3 to L0.

Two-pole circuit breaker with a dual-voltage system (example: 120/240-volt, 3-wire). Attach stator leads marked 1 and 4 to the side of the circuit breaker marked LINE. Do not use a jumper lead (see Section 8). Attach stator leads 2 and 3 to L0.

Single-pole circuit breaker with a 240-volt, 2-wire, single-voltage system. Attach the stator lead marked 2 to the side of the circuit breaker marked LINE (see Section 8). Bolt together leads 1 and 4 and tape to insulate from ground. Attach the stator lead marked 3 to L0.

9.Connect the stator lead(s) used for neutral connection to the L0 stud. See the illustrations in Section 8.

TP-6069 6/03 Section 6 Electrical System 21