Product DescriptionThe INTERMATIC DDFM is an adaptive defrost control module designed to manage defrost cycles in refrigeration and heat pump systems. It replaces traditional time-based defrost timers with demand-based logic, initiating defrost only when frost accumulation requires it. This reduces compressor run time and energy consumption without sacrificing system performance. Licensed HVAC-R technicians and refrigeration service pros install this type of control during routine timer replacements or system efficiency upgrades. The DDFM measures 5.25 inches by 2.25 inches by 8.5 inches and weighs 0.45 pounds, making it a compact drop-in format for tight equipment compartments.The DDFM is suited for commercial and residential refrigeration equipment and heat pump applications where standard interval-based defrost controls are currently installed. Adaptive defrost logic is especially valuable in variable-load environments such as reach-in coolers, walk-in refrigeration units, and split heat pump systems where frost accumulation rates change with ambient conditions and door cycling frequency. It is installed by qualified refrigeration technicians or HVAC-R service professionals.Key FeaturesAdaptive demand-based defrost logic reduces unnecessary defrost cycles compared to fixed-interval timersCompact enclosure at 5.25 x 2.25 x 8.5 inches fits standard equipment compartmentsLightweight at 0.45 pounds for easy handling during installationDrop-in replacement format compatible with common defrost timer mounting footprintsReduces compressor run time and energy draw by eliminating excess defrost eventsCompatibilityDesigned as an OEM-style adaptive defrost replacement for refrigeration and heat pump systems that currently use interval-based defrost timer controls.Installation NotesInstallation should be performed by a licensed HVAC-R technician or qualified refrigeration service professional. Disconnect power to the unit at the disconnect or breaker before removing the existing defrost timer or control. Verify wiring terminations match the existing circuit configuration before energizing. Follow applicable local codes and manufacturer wiring diagrams during replacement.Technical SpecificationsLength: 5.25 inchesWidth: 2.25 inchesHeight: 8.5 inchesWeight: 0.45 poundsUPC: 07827514853Standard InformationBrand: INTERMATICManufacturer Part Number: DDFM