IO HVAC Controls UMM-FS Malfunction Monitor, Freeze Stat

Features:

• The UMM-FS can monitor the suction line temperature of an AC unit with the use of a freeze stat to prevent coil freeze up and potential water damage in the event of a blower motor failure or restricted airflow caused by a dirty filter, clogged coil, or low refrigerant.
• It is recommended that the time delay be set for 6 minutes to prevent false triggering due to cold ambient compressor start-up.
• It is highly recommended that the Freeze Stat be wrapped with insulated tape.

The UMM Universal Malfunction Monitor is a solid-state, 24 VAC interface module designed to accept a variety of dry contact inputs such as a current sensing relay, static pressure switch, refrigerant pressure sensor, or freeze stat. The module will trigger an SPDT relay after a selected time of 6 seconds or 6 minutes once the input contacts open. The relay contacts can be used to disrupt equipment operation and/or send a signal to an alarm or other external monitoring device that a malfunction has occurred. This can greatly reduce damage to equipment and property as well as save downtime and expensive equipment failure costs.

Wiring Diagram: