Section 1
General Information
Receiving & Installation 3-13
MN722
Hardware Changes for Reduced Voltage Input
Size C+, D+,D, E, F and G+ controls all require modification for operation at a reduced
line voltage (less than rated nominal). Table 3-8 defines the modifications for each
enclosure size. Figure 3-1 shows the locations of the transformer locations for each
enclosure size.
Table 3-8 Hardware changes for 380-400VAC operation
Enclosure
Size
Control
Transformer
Tap Change
Contactor
Transformer
Tap Change
Fuse Block
Connection
Change
C+
Yes
No
D+
Yes
No
D
Yes
No
E
Yes
Yes
F
Yes
Yes
G+
No
Yes
Yes
Figure 3-1 Control and Contactor Transformer Locations
Control Sizes
C+, D, D+
Logic Control
Board
Control
Transformer
Control Size
E
Control Size
F
Control
Transformer
Contactor
Transformer
Input
Contactor
Control Size
G+
Contactor
Transformer
Fan
Transformers
Input
Contactor
Control
Transformer
Contactor
Transformer
Input
Contactor
Not drawn to scale or proportion
Swing out panel
Fuse
Block
xfmr
xfmr
Summary of Contents for 22H series
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Page 105: ...Section 1 General Information 5 22 Troubleshooting MN722...
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Page 138: ...Appendix B Appendix B 1 MN722...
