Prep tables are often one of the most neglected pieces of equipment in the kitchen since they are high-use and can be difficult to move for cleaning. These tables get messy since there are many ingredients involved, for example, flour, sauce and toppings with pizza prep.
For this reason, keeping up with cleaning and maintenance should be a priority, with operators keeping an eye out for corrosion caused by food items, such as acidic sauces and tomatoes.
During cleaning, turn off the prep table and remove the food. Leaving it on and keeping the doors open sucks warm air in. When this occurs, the unit can’t pull down the temperature, and this results in the evaporator icing over.
Regular cleanings should include clearing drain lines, cleaning evaporator coils with a brush and carbon dioxide or a shop vacuum, cleaning fan blades and condensers, ensuring motors are clean, and checking for refrigeration leaks. Remove food debris from in and around the unit as necessary. For the table’s storage section, use soap or a mild cleanser.
Operators also run the risk of compressor coils becoming dirty and gummy, especially due to the deeper fins on these units. Coils can be 3 inches to 4 inches thick, so chemicals are necessary to thoroughly remove caked-on flour and grease. Condenser coils need to be cleaned weekly by turning off the unit and using a soft fin brush. If debris is embedded, operators can spray coils with warm water and let them air-dry for 10 to 15 minutes. If operators spray the coil with a water hose, it can bend the fins and restrict the condenser’s airflow. This may result in the prep table having problems reaching proper temperatures. Coated evaporator coils are available and may be a good option for a longer service life.
Top rails with various toppings stored inside, like fresh vegetables and sauces, can get into the air and cause corrosion. This can result in evaporator problems, including leaks that require a pricey replacement. Clean the rails with the unit turned off, using warm water that empties into a bucket or down a drain.
If the doors do not seal properly, ambient air will enter the cavity and can cause the coil to work harder and possibly freeze. Use a mild cleaner when cleaning gaskets. Some units require the condensate pans to be cleaned and replaced; hot gas evaporators do not require replacement. Air-conditioning filters need to be changed, as well as door seals.
Service technicians typically work on these units quarterly, but if the temperature fluctuates, a service call is necessary. Never tamper with a thermostat.
The average service life of prep tables is about seven years. Signs that service is necessary include condensing units icing up and the interior not reaching proper temperatures. Gaskets often need replacing due to slamming, along with spring-loaded hinges, which wear out over time.
