Discussion:

Grounding Jumpers on Rockwell PF755 Drives for ACRA & CVHS/M model chillers

To avoid severe hardware damage in the presence of ground faults or lightning events, it is necessary to understand the power distribution source to the chiller and its grounding system.

• For grounding systems which utilize corner grounded, high impedance grounded or ungrounded system, it is required to disconnect both MOV (PE-A) and Common Mode (PE-B) grounding jumpers.
  See Figure 124 & 125 Disconnected positions.
• For sites with solidly grounded systems, it is required to connect both MOV (PE-A) and Common Mode (PE-B) grounding jumpers. See Figure 124 & 125 Connected positions.

Additional Notes:

For additional questions, please contact Pueblo Technical Service

Original Document: DOC-169746

WARNING:

Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.