Product Manual

3. Installation8-2018

The transfer switches require a combination of genset battery (B-) and (B+) for control wiring depending

on whether the genset is a PC1.1 control model or an air-cooled model (C13N6H, C17N6H, C20N6H).

See Interconnect Wiring Diagram for pictorial representation.

1. N/C or N/O Utility Source Available Indicators: (B-) present when Utility Source is available (TB4-2).

(B-) present when Utility Source is unavailable (TB4-1).

2. N/C or N/O Switch Position Indicators: (B-) present when Utility Source is Connected (TB4-5). (B-)

present when Utility Source is Disconnected (TB4-9).

3. N/C or N/O Switch Position Indicators: (B-) present when Emergency Source is Connected (TB4-6).

(B-) present when Emergency Source is Disconnected (TB4-8).

4. Transfer Switch Control (PC1.1 Genset Application): (B+) is wired to (TB4-7) and (B-) is wired to

(TB4-4). Switch transfers to available Generator Source upon receiving (B-) signal at (TB4-3) and

retransfers to available Utility Source when (B-) signal is removed.

5. Transfer Switch Control (Air-cooled Genset Application): (B-) is wired to (TB4-4). Jumper is installed

across (TB4-3 and TB4-4). Switch transfers to available Generator Source upon receiving (B+) signal

at (TB4-7) and retransfers to available Utility Source when (B+) signal is removed.

Wire resistance must not exceed 0.5 ohm per line. Use stranded or solid wire. For connection to the screw

terminal, strip the insulation back 3/8 inch (10 mm).

3.2.3 Final Inspection and Cleanup

Prior to energizing the transfer switch:

1. Inspect all wiring to be certain that:

• All cabled connections are correct.

• All generator start low voltage signal connections are correct (refer to drawings at the end of

this manual and in the generator manual).

• Wiring does not interfere with switch operation.

• Wiring is not damaged as the door opens and closes.

• Wiring does not contact sharp or abrasive surfaces.

• No wiring is left loose and unconnected.

CAUTION

Debris lodged in the electrical and mechanical components may result in equipment

damage. Do not use a blower to remove debris.

2. Use a vacuum cleaner to remove any dust, filings, chips, or debris from the cabinet interior and

components.

3. Check the lug torque values of the power connections.

NOTICE

Lug torque values are specified on the label inside of the enclosure and in the Section 3.2.1

on page 30 tables.

4. Double check the power supply voltages to make sure they match the voltages listed on the

nameplate.

5. Make sure that all covers and barriers are installed and properly fastened.