Emerson 7000 manual INSTALLATION continued, Functional Test, Harnesses, Engine Starting Contacts

INSTALLATION (continued)

Harnesses

The transfer switch is connected to the left side of the controller by a plug-in harness (two plugs).

Engine Starting Contacts

The engine control contact connections (if used) are located on the transfer switch. Connect signal wires to appropriate terminals as specified in Table A and shown in Figure 1-2.

Table A. Engine Start Connections

When normal	Terminals on
source fails	transfer switch
contact closes	TB14 and TB15
contact opens	TB14 and TB16

ENGINE STARTING CONTACTS ( SHOWN DE–ENERGIZED )

TOP	14
STUD
MIDDLE	TS	TB 14
	NR
STUD	15
BOTTOM	16	TB 16	TB 15
STUD
	NR

Figure 1-2. Engine starting contact label and location on left side of transfer switch.

Auxiliary Circuits

Connect auxiliary circuit wires to appropriate terminals on the transfer switch. Note the control features that are furnished on this switch. Make the necessary auxiliary connections by referring to the Wiring Diagram.

Functional Test

The Functional Test consists of three checks:

S1 — Manual Operation Test, on this page

S2 — Voltage Checks, page 1–3

S3 — Electrical Operation, page 1–4

Do these checks in the order presented to avoid damaging the ATS.

direction of the weight. Turn it up or down as shown to manually operate the transfer switch. It should operate smoothly without any binding. If it does not, check for shipping damage or construction debris.

3.Return the transfer switch to the Normal position.

Note: If Normal and Emergency connections are

reversed this operation is also reversed.

Now continue to 2 – Voltage Checks on next page.

Position of the transfer switch is indicated here

Read all instructions on the Wiring Diagram and labels affixed to the automatic transfer switch. Note the control features that are provided and review their operation before proceeding.

1 – Manual Operation Test

A maintenance handle is provided on the Transfer Switch for maintenance purposes only. Manual operation of the transfer switch should be checked before it is energized (operated electrically).

Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.

1.After deenergizing both power sources, open the enclosure door. Locate and the maintenance handle on the left side of the transfer switch. See Figure 1–3.

2.Grasp the attached maintenance handle and turn it with thumb and fingers as shown to manually operate it. The maintenance handle turns the opposite

1---2

weight marked N (normal) and E (emergency)

maintenance handle

weight

floating weight

With ALL POWER OFF grasp maintenance handle and turn it quickly with your thumb and fingers.

Figure 1–3. Maintenance handle and positions.