ICUBE Adaptive Defrost Module

An easy, versatile, innovative, and affordable way to
reduce defrost cycles by 40% or more per day.

Calculate your energy savings

Generate energy savings with ICUBE

Generate energy savings in the food service industry with the new ICUBE.

Designed by Grässlin by Intermatic, this Adaptive Defrost Refrigeration Module for commercial walk-in coolers and freezers puts the chill on unnecessary defrost cycles and provides some refreshing savings on utility bills. Innovative, smart-sensing technology continuously monitors evaporator coil temperatures in walk-in coolers and freezers and only allows defrosting when necessary at the next programmed timer interval.

Click here to view product specifications.


Greater Energy Efficiency with a Time and Temperature Combination.

Running unnecessary defrost cycles in commercial walk-in coolers and freezers is impacting the utility bills of commercial food service businesses. Now there's a better way. Simply retrofit a Grässlin DTAV40 Defrost Timer with the ICUBE™ Module for smart, energy-efficient control of commercial walk-in coolers and freezers. The ICUBE™ Module uses adaptive defrost control algorithms to continuously monitor the conditions of the evaporator coil and only defrosts when necessary at the next programmed interval. Time scheduling is especially important during busy periods in food service, such as the lunchtime rush. The example below compares defrost cycles during high usage periods with a temperature-initiated only control versus the ICUBE™ Module with a DTAV40 Defrost Timer.

Benefit vs. Temperature initiate only
Defrost only when needed with ICUBE module

Defrost cycles during high-usage times with
a temperature-only initiated control.

With temperature-initiated controls, defrost cycles can run unnecessarily during high-usage periods which can result in frequent defrosting and efficiency loss from prolonged pull down durations. This is due to the exterior ambient air infiltrating the box and making contact with the evaporator coil, creating a frost load condition.

Defrost cycles during high-usage times with the
ICUBE™ Module.

When paired with a Grässlin DTAV40 Defrost Timer,
the ICUBE™ Module utilizes a time/temperature hybrid methodology which maintains the timer scheduling aspect which would in effect temporarily delay a defrost to initiate at an optimal low usage time.


back to top

ICUBE Module = EASY2 for Contractors.

Easy integration. Easy expandability.

Whether you’re installing a total time clock replacement or looking for a fast retrofit, the ICUBE™ Module is an easy-to-integrate, low-cost solution for commercial refrigeration systems found in all types of food-service facilities: Retail stores, food services, restaurants, convenience stores, gas stations, hospitality, universities, schools, grocery stores, hospitals, nursing homes, and healthcare.

Click here to view product specifications.

  DTAV40 with ICUBE Module and Sensor Wires 


  • EASY – Assembles directly into existing Grässlin DTAV40 Time Initiated, Temperature, Pressure, or Time Terminated Defrost Timers.
  • INNOVATIVE – Demand defrost; only defrosts evaporator coils when necessary.
  • SMART – LED indicator conveys status and fault conditions, including efficiency mode and probe fault.
  • RELIABLE – Maintains the timer’s scheduling to reduce frequent defrost initiations during high usage times.
  • EXPANDABLE – Reaches remote condensing units up to 400 ft with typical field-used 18 gauge shielded or unshielded wire.
  • VERSATILE – Four sensor inputs accommodate up to four evaporators or multiple sensor locations for larger coils.
  • THIN – Simply install the module right underneath the existing DTAV40 FM-Timer Module and run the sensing wire from the ICUBE™ Module inputs to the evaporator coils (sensor wire runs through existing conduit); there’s no need to change any other wiring in the system.

Retrofitting the ICUBETM Module to a Grässlin DTAV40 Defrost Timer:

1. Remove the FM-Timer Module.

2. Snap the ICUBE™ Module onto the existing timer relay board – it fits unobtrusively underneath the FM-Timer Module.

3. Insert quick connect temperature sensor to ICUBE™ sensor inputs (sensor included).

4. Run sensor wire from theICUBE™ Module to the system’s evaporator coils. There is absolutely no change required to wiring at the existing timer terminal locations or at the load or contactor points.

5. When the blue LED indicator illuminates, the ICUBE™ Module is in efficiency mode; the light will change to communicate other status or fault conditions.

Retrofitting the ICUBE Module to a Grässlin DTAV40 Defrost Timer
Model # Description

ICUBE™ Adaptive Defrost Refrigeration Module with Sensor


Adaptive Defrost Refrigeration Time Control with ICUBE™ Module, Sensor, and Type 3R Enclosure


Additional separate sensor accessory (for multiple evaporator applications)

back to top

Module = SAVINGS2 for the Food Service Industry.

Save on energy. Realize a rapid payback.

Increasing food prices and volatile energy costs are biting into the profit margins of food service businesses. The simple addition of the energy-saving ICUBE™ Module to a walk-in cooler or freezer can significantly impact a building owner's savings by reducing utility bills and delivering a fast return on investment. The ICUBE™ Module pairs with a Grässlin DTAV40 Defrost Timer to monitor based on both time and temperature. 

The timer scheduling function delays defrosts during those hectic in-and-out of the freezer periods and delays them to a low usage optimal time, such as when the kitchen is closed.Skipping unnecessary defrost cycles greatly reduces energy consumption. Since the ICUBE™ Module helps curtail the drain on the power grid during times of congestion, implementing this type of control could also provide an opportunity for even greater savings for businesses that participate in demand response programs.

Add up the savings

Compare the kilowatt hours at two restaurants: Both locations use two evaporators with 1500 watt electric defrost heaters that run 365-days. With the ICUBE™ Module, average usage per day decreases (per hour) and kilowatt hours are reduced. In this example, kilowatts decrease by 876-hours, generating a $150 annual cost savings and an ROI of just over 1-year.

Restaurant with Defrost Timer
Restaurant with Defrost Timer and ICUBE Module

Calculate your Energy Savings

Use our online Energy Savings Calculator tool to easily determine your company’s potential for saving money when you install an energy-efficient Intermatic control solution.

back to top

Green Goals
Achieve “green” goals.

More and more patrons are seeking establishments that support sustainability efforts. Installing the ICUBE™ Module at your facility helps contribute to a reduction in annual greenhouse gas and CO2 emissions –– supporting your "green" initiatives and deepening loyalty with your clientele and the community. Every building adds up to make a big impact. 50,000 installed Demand Defrost Controls reduce CO2 emissions by 15,101 metric tons. This is equivalent to:

Removing vehicles from the roads
Eliminating landfill waste
Conserving gasoline
Removing 3179 passenger 
vehicles from the roads
Eliminating 5,413 tons 
of landfill waste
Conserving 1.7 million 
gallons of gasoline
Green Goals




Download PDF brochure

Twitter  Facebook  YouTube  Google+  Instagram  Pinterest  LinkedIn TELL A FRIEND CONTACT US TO LEARN MORE