Emerson 300 manual INSTALLATION continued Functional Test, Manual Operation Test

INSTALLATION (continued)

Functional Test

The Functional Test consists of three checks: manual operation, voltage checks, and electrical operation.

NOTICE

Do these checks in the order presented to avoid damaging the automatic transfer switch.

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 detachable maintenance handle is provided on the frame of 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 remove the mainte- nance handle from the clips on the left side of the transfer switch frame. Insert the handle into the hole in the molded hub on the left side of the operator. See Figures 1–3 and 1–4 and Table B.

2.Move the maintenance handle 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.

Table B. Maintenance handle positions.

ATS Position	Handle	Indicators
E	up	E = O
Normal		upper contacts open
		N = C
N
		lower contacts closed
E		E = C
Emergency		upper contacts closed
		N = O
N	down
		lower contacts open
handle	UP closes the
	Normal source
	contacts (lower)
hub	DOWN closes the
	Emergency source
	contacts (upper)

frame

left side of

transfer switch

maintenance

handle

storage clip

Figure 1-3. Maintenance handle & storage location.

3.Return the transfer switch to the Normal position. Observe that the window indicators (right side) show the top shaft O (open) and the bottom shaft C (closed).

Note: If Normal and Emergency connections are

reversed this operation is also reversed.

4.Remove the maintenance handle and store it on the frame (left side) in the clips provided.

NOTICE

Verify that the maintenance handle has been removed before proceeding!

Now continue to 2 – Voltage Checks on next page.

Emergency contacts

window
indicators	contact position
O is open	indicators (right side)
C is closed
Normal
contacts

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