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BYPASSING & ISOLATING
(continued)
3 --- 4
RETURN TO SERVICE continued*
This procedure explains how to return the Bypass Switch
Handle to the OPEN position. The B ypass Handle must
be in the CLOSED position (yellow indicator on NOR-
MAL or EMERGENCY) and the Isolation Handle must
be in the TEST position (window). If the handles are not
in these positions, refer to R eturn 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 indicate s 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
counterclockwise.*
Indicator shows:
green
●
OPEN when the
ATS is not
bypassed.
Indicator shows:
yellow
●
EMERGENCY CLOSED
when ATS is bypassed to Emergency
or
yellow
●
NORMAL when ATS is
bypassed to Normal Source.
Figure 3–11. Bypass Handle and position indicators.
To Un–Bypass Normal Source*
(Load connected to Normal Source)
The Transfer Swit ch Connected To Normal light is on
and Transfer Switch Connected To Emergency light is off.
Push in
*the BypassHandlethenturn itcounterclockwise
until Bypass Switch Position shows OPEN (green indica-
tor). 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 lightshould beoff.
E
L
N
ATSE
Bypass Switch
Pull out
Bypass
Handle
&
turn it
counter-
clockwise.
Figure 3–13. Un–Bypass Emergency.
The Automatic Delayed–Transition 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.