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Icing issues in walk-in freezers

Icing issues in walk-in freezers

A cold storage such as walk-in freezers meets its objective and delivers the efficient service if it is planned, operated and maintained well. Standard operating procedures, components, technical specifications, installation, general preventive maintenance and together with its interfacing equipment.

In a typical restaurant/kitchen/industry the working temperature of a walk-in cooler/ walk-in freezer units are controlled by their thermostat to maintain the inside temperature within +20C to +80C in case of walk-in-cold rooms and –150C to –250C in case of walk-in-freezer Rooms. One cooling/freezing unit is sufficient to maintain the temperature in the required range. While the condenser fans of which are the units outside the cold /freezer room cool the condenser coils and they run only when the compressor is running and sufficient pressure builds up in the condensers.

There are two types of icing issues in walk-in freezers these are frost or snow which is caused by warm and moist air infiltration. When water goes directly to vapor than to a solid deposition it creates frost or snow. This due to the constant walk-in door which the sealing property or penetration of air leaks on the pipes. First aid patch-ups on this is to have adjustments or new gasket on the pipes, while hinge or latch for the door leak problem. If doors are left open for a long period of time, install a strip curtain. Check for other sides of the walk-in freezers for air penetration and have them sealed properly. If the door appears to be correctly adjusted and the power is on, please call us, we here Bay Area Refrigeration Company, also known as BARCO, is the Bay Area’s choice for refrigeration, air conditioning, heating, and ice machine trusted Repair Company.  We work with commercial, foodservice and other industries in maintaining their refrigeration equipment.

Second icing issues in walk-in freezers are the hard, clear ice that forms from water coming out of the evaporator during defrost cycles. The buildup is much more likely in incomplete defrosts and poor drainage. Other sources are if ice is forming on the ceiling near the evaporator unit, or if the evaporator unit is icing too much, there might be a problem with the refrigeration system. Check for water drips from the evaporator unit inside the walk-In, the evaporator unit drain line might be plugged. If so, clean the drain pan and its pipe. In a freezer, check the drain line heater if it is working and is connected to a constant power source.

A defrost cycle system of these freezers does it work by placing a heating element attached to its evaporator, which reverses the freezer refrigeration cycle. The units’ evaporator coil will release heat to melt the ice that has gathered on it. For defrosting of the walk-in freezer is done automatically by the defrost timer or defrosting signal from the digital temperature controller, at preset intervals for a series of the period of time. Importantly modern walk-in freezers have a function called demand defrosts, constantly checks for the buildup of ice on an evaporator coil to determine if defrosting is required. If a defrost is needed, the standard reverse cycle defrost method is initiated. This allows the frost to melt and drain out.