Wiring - PENN Controls - MR534AFDN - MR534AFDV - Electronic Refrigeration, Defrost, and Multi-Purpose Controller - MR5xx Panel‐Mount Refrigeration and Defrost Controller

MR5 Series Panel Mount Case Controller Installation Guide

PENN Controls
Product name
MR5xx Panel‐Mount Refrigeration and Defrost Controller
Document type
Installation Guide
Part number
Document revision
Revision date
Product status

Observe the following wiring guidelines.

  • Risk of Electric Shock
  • Disconnect or isolate all power supplies before making electrical connections. More than one disconnection or isolation may be required to completely de-energize equipment. Contact with components carrying hazardous voltage can cause electric shock and may result in severe personal injury or death.
  • Risque de décharge électrique
  • Débrancher ou isoler toute alimentation avant de réaliser un branchement électrique. Plusieurs isolations et débranchements sont peut-être nécessaires pour-couper entièrement l'alimentation de l'équipement. Tout contact avec des composants conducteurs de tensions dangereuses risque d'entraîner une décharge électrique et de provoquer des blessures graves, voire mortelles.
  • Do not exceed the electrical ratings. Exceeding electrical ratings can result in permanent damage and void any warranty.
  • Electrostatic discharge (ESD) can damage control components. Use proper ESD precautions during installation, setup, and servicing to avoid damage.
  • Do not connect supply power before finishing wiring and checking all wiring connections. Short circuits or improperly connected wires can result in damage and void any warranty.
  • Run all low-voltage wiring and cables separate from all high-voltage wiring and route wires per national electrical code (NEC) or local electrical code requirements. Use shielded cable for low-voltage cables that are exposed to high electromagnetic or radio frequency noise.
  • Use copper conductors only. Make all wiring in accordance with local, national, and regional regulations.