Operating a 460 VAC Control on 380-400 VAC
Size A and B controls may be used directly with a 380-400 VAC power source, no reconfiguration of
the control is necessary.
Control sizes C, D, E, and F all must be reconfigured for operation on the reduced line voltage.
Specifically, the control transformer (see Figure 2-2) must have the wire on terminal 5 moved to
terminal 4 as shown below. Remove the front cover to gain access to the control transformer.
Figure 2-2 Configuring the Control Transformer for 380 - 400 VAC Operation
Operating the Control with a Single Phase Input
Single phase AC input power can be provided to the control instead of three (3) phase input to the
controls when the changes listed below have been made.
Power Connections
Connect the incoming power to input terminals L1 and L2. Place a jumper between control input
terminals L2 and L3. Size this jumper wire the same as the incoming line to L1. Change circuit board
jumpers as instructed below.
Hardware Jumpers Changes for Single Phase Input
1-50 HP 230 VAC controls: No hardware jumper changes to control necessary.
1-10 HP 460 VAC controls: No hardware jumper changes to control necessary.
2-11
INSTALLATION
1 2 3 4 5 6
460V
1 2 3 4 5 6
380V/400V
NOTE: WIRES 3 & 6
MAY NOT BE PRESENT
ON ALL MODELS
MOVE WIRE FROM
POSITION 5 TO 4
MN723H-10/95 11/28/95 1:08 AM Page 23 (Black plate)
Summary of Contents for 23H Series
Page 11: ...1 8 GENERAL INFORMATION MN723H 10 95 11 28 95 1 07 AM Page 12 Black plate...
Page 83: ...3 30 KEYPAD PROGRAMMING AND OPERATION MN723H 10 95 11 28 95 1 13 AM Page 84 Black plate...
Page 99: ...4 16 DIAGNOSTIC INFO AND TROUBLESHOOTING MN723H 10 95 11 28 95 1 14 AM Page 100 Black plate...
Page 125: ...5 26 APPENDIX G MN723H 10 95 11 28 95 1 21 AM Page 126 Black plate...
Page 126: ...MN723H 10 95 11 28 95 1 21 AM Page 127 Black plate...