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3. Installation and Wiring
3.6.4 Dual Input Modification
WARNING:
1. Only experienced engineers or service personnel should modify single input/dual input setup.
2. For dual input, the main AC source's Neutral (N) must be connected with the bypass source's Neutral (N).
The UPS default setting is single input. To modify it into dual input, follow these steps.
1
Remove the panels shown in the figure below.
SUTX20K
(20kVA Model)
PARALLEL
PARALLEL
PARALLEL
RS-232
SWITCH
1 2
MANUAL BYPASS SWITCH
ON
P1 P2 P3 P4 P5 P6
P1 P2
WARNING:
OUTPUT
INPUT
CHARGER
REPO
DRY CONTACT
DRY CONTACT
DETECTION
OPENING THIS COVER PLATE WILL
CAUSE INVERTER SHUTDOWN.ONLY
AUTHORIZED SERVICE PERSONNEL
CAN OPEN AND OPERATE IT.
I
ON
ON
I
I
ON
I
ON
I
ON
I
ON
I
ON
ON
I
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
INPUT BREAKER
BYPASS BREAKER
(Figure 3-14: Panel Location)
SUTX40K
(40kVA Model)
PARALLEL
PARALLEL
PARALLEL
RS-232
SWITCH
1 2
ON
P1 P2 P3 P4 P5 P6
P1 P2
OUTPUT
INPUT
CHARGER
REPO
DRY CONTACT
DRY CONTACT
DETECTION
I
ON
I
ON
I
ON
ON
I
I
ON
I
ON
I
ON
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
INPUT BREAKER
BYPASS BREAKER
18
MANUAL BYPASS SWITCH
WARNING:
WARNING:
OPENING THIS COVER PLATE WILL
OPENING THIS COVER PLATE WILL
CAUSE INVERTER SHUTDOWN.ONLY
CAUSE INVERTER SHUTDOWN.ONLY
AUTHORIZED SERVICE PERSONNEL
AUTHORIZED SERVICE PERSONNEL
CAN OPEN AND OPERATE IT.
CAN OPEN AND OPERATE IT.
I
ON
O
OFF
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