The MR Series temperature controls are designed for use with hot gas or electric heat defrost in both refrigeration and freezer units. Either time or temperature based defrost termination may be selected.
The MR Series incorporates control functions such as compressor control, defrost management, fan management, and alarm management.
Refer to the MR4PMUHV Electronic Temperature/Defrost Control with Relay Pack Product Bulletin (LIT-125190) for important product application information.
Figure 1. MR4PMUHV Temperature Control