Asco 7000 Series - Operate to NORMAL; Operate to EMERGENCY

Bypassing & Isolating Operator’s Manual
381333-194 B 17
Bypassing & Isolating
Middle amber light
should come on.
position
window
CONN
TEST
ISOLATE
clockwise – draws in
the transfer switch
Figure 25 Isolation Handle turned to TEST
3. The ATS can be tested now without load
interruption (see page 9).
Solenoid interlock prevents you from closing the
isolation contacts until the ATS is in the same
position as the Bypass Switch.
4. Observe which Bypass Switch Position window
indicator is yellow (NORMAL or EMERGENCY) at
the Bypass Switch Handle. This indicates the source
connected to the load.
5. Observe which Transfer Switch Connected To light
is on (Normal or Emergency) on the door. This is the
position of the Transfer Switch. If it is not in the same
position as the Bypass Handle change the position
of the Transfer Switch as follows:
To change the position of transfer switch
Operate to NORMAL Operate to EMERGENCY
Turn Transfer Control
switch to Retransfer
Dela
y
B
y
pass.
Turn Transfer Control
switch to Transfer Test
(
hold 15 seconds
)
.*
Connected To Normal
li
g
ht should come on.
Connected To Emergency
li
g
ht should come on.
* If Feature 2B time delay is used, there will be a delay
before transfer to Emergency
NOTE: With Normal available, the automatic transfer
switch will not stay in the emergency position unless
Feature 3A time delay is used (at least 30 seconds).
Do not close the isolation contacts unless
the Transfer Switch (ATS) and Bypass Switch are
in the same position!
6. When the transfer switch is in the same position as
the Bypass Switch handle, continue turning the
Isolation Handle clockwise (about 8 turns) until the
window shows CONN (connected).
Figure 26. TEST to CONN (connected) position.
Upper amber
light should be
on.
position
window
CONN
TEST
ISOLATE
clockwise – draws in
the transfer switch
Figure 27. Isolation Handle turned to CONN