Installation Instructions

Document No. 129-405
Installation Instructions
October 5, 2009
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models
as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners.
© 2009 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
+ 1 847-215-1000
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Document No.129-405
Printed in the USA
Page 14 of 14
Figure 12. NEMA Type 3R/3RHE Bypass Power Circuit.
NOTES:
1. Branch circuit protection to be provided by installer, per UL508A, if not provided with drive.
2. For bypass operation modify these drive parameters: P0704 (0) and P0704 (1) = 3.
3. Control and communication wiring should be 300V UL minimum.
4. Communication wiring should be run with maximum separation possible from all other wiring.
5. Essential service mode operates the motor full speed (bypass) with no protection for the motor or system.
6. Ensure that automatic bypass will not damage the system before activating.
7. See Siemens Publication No. 125-3377 for proper fuse and wire sizes.
8. See Siemens Publication No. 125-3201 for SED2 VFD input/output signal wiring details.