Filter
Top Products
BYPASSING & ISOLATING
(continued)
3 --- 5
RETURN TO SERVICE continued*
This procedure explains how to return the Bypass
Switch Handle to the OPEN position. The Bypass
Handle must be in the CLOSED position (yellow
indicator on NORMAL or EMERGENCY)andthe
Isolation Handle must be i n the TEST position
(window). If the handles are not in these positions,
refer to Return to Service on page 3–3. See Figures
3–11, 3–12, and 3–13.
You can only bypass to the same source
that the ATS is connected. Solenoid
interlock prevents incorrect operation.
1 Observe which Bypass Switch Position indicator is
yellow (NORMAL or EMERGENCY)attheBypass
Switch Handle. This indicates the source
connected to the load.
2 Un–Bypass to same source as the Bypass
Switch
Position
as follows (select Normal or Emergency).
To un–Bypass Normal push in handle
all the wa y & turn it counterclockwise.*
To un–Bypass Emergency pull out
handle all the way & turn it
counterclock wise.*
Indicator shows:
green
O
OPEN when the
ATS is not
bypassed.
Indicator shows:
yellow
O
EMERGENCY CLOSED
when ATS is bypassed to Emergency
or
yellow
O
NORMAL when ATS is
bypassed to Normal Source.
Figure 3–11. Bypass Handle and position indicators.
To Un–Bypass Normal Source*
(L oad connected to Normal Source)
The Transfer Swit ch Connected To Normal light is on
and Transfer Switch Connect ed To Emergency light i s off.
Push in* the Bypass Handle then turn it counterclock-
wise until Bypass Switch Position shows OPEN (green
indicator). The Unit Not in Automatic light should be
off.
E
L
N
Push in
Bypass
Handle
&
turn it
counter-
clockwise.
ATS
Bypass Switch
Figure 3–12. Un–Bypass Normal.
To Un–Bypass Emergency Source*
(Load connected to Emergency Source)
The Transfer Switch Connected To Emergency light is on
and Transfer Switch Connected To Normal light is off.
Pull out* the Bypass Handle then turn it counterclock-
wise until Bypass Switch Position shows OPEN (green
indicator). The Unit Not in Automatic light should be
off.
E
L
N
ATS
Bypass Switch
Pull out
Bypass
Handle
&
turn it
counter-
clockwise.
Figure 3–13. Un–Bypass Emergency.
The Automatic Transfer & Bypass–Isolation Switch should be left in this position.
*NOTE: When Accessory 66A (reversed Normal & Emergency connections) is specified,
the handle push–pull operation is reversed. Follow instructions on the door.