INSTALLATION
(continued)
1---3
Functional Test
The Functional Test consists of three checks: manual
operation, voltage checks, and electrical operation.
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
Normal
E
N
up
E = O
upper contacts open
N = C
lower contacts closed
Emergency
E
N
down
E = C
upper contacts closed
N = O
lower contacts open
maintenance
handle
left side of
transfer switch
storage clips
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.
Verify that the maintenance handle
has been removed before proceeding!
Now continue to
2 – Voltage Checks
on next page.
handle
hub
UP closes the
Normal source
contacts (lower)
DOWN closes the
Emergency source
contacts (upper)
frame
window
indicators
O
is open
C
is closed
Emergency
contacts
Normal
contacts
contact position
indicators (right side)
Figure 1-4. Maintenance handle operation and contact position indicators.
