Having a systematic approach for the walk-in freezer and cooler maintenance is the best guide.
The walk-in freezer or walk-in cooler is a major part of many convenience stores, cafeterias, and restaurants. It is also a big energy user but is rarely even thought of until an issue happens.
Walk-in cooler and freezer problems like compressor failure and failure to maintain pressure can result in a costly loss of products inside the cooler. These issues, as well as high energy use, can actually be avoided by maintaining equipment and taking action.
How Evaporators Work
Moisture from the air will freeze on the cooling coils of the freezer and will form a barrier from heat transfer. The airflow will then decrease due to ice buildup on the passages. Each evaporator will have a defrost cycle that will melt the built-up ice on the coils. Water from the ice is drained from the freezer, normally.
Ice On The Evaporator
It isn’t unusual to find the evaporator in a poor state. For an evaporator unit, whenever water isn’t drained right or the ice has not melted it could cause ice on the evaporator. Whenever the coil freezes, heat transfer is reduced which makes the compressor work longer and harder. It works harder due to suction pressure drops which makes the compressor work at a higher pressure, which requires more power. It will work longer because the heat transfer is reduced. Whenever there is excessive ice buildup, the compressor will run constantly and the freezer temperature won’t be maintained.
Water Won’t Drain Out Of Freezer
When the ice melts, the water has to drain out of the freezer. This does not always happen. Trapped water that freezes can do a lot of damage, especially to an older freezer where the cracks allow water to come in and then it freezes and expands. Stalagmites and stalactites of ice will show up in the freezer are a reason to take action to avoid a lot of expensive damage.
How Condensers Work
A condenser coil in the system will remove heat from the refrigeration system. It isn’t unusual to find the condenser in an enclosed space or spaces that do not have a lot of air flow to remove heat from the space. The temperature near the compressor will result in a high head pressure for the compressor, which increases the power of the compressor.
Condenser Should Be We Ventilated
To remove the heat, the condenser needs to be in a ventilated area where the temperature is controlled to allow heat to be removed. Enclosed spaces will need openings for exhaust and cooling air intake. In most cases, there will be a need for a fan to move enough air into space. Whenever the heat from the condenser is not needed, it should be sent outside.
There are times where it can be used for heating areas such as a dry storage room, controls can be installed to direct the flow inside for heating and outside when the heat is not required.
Check Condenser Coils Regularly
Condenser coils need to be regularly checked to see if they are clean. Debris and dust will act like ice buildup. This insulates the heat transfer and reduces airflow, which makes the compressor run longer and harder which may cause the compressor to fail.
Inspecting Refrigerated Space & Shell
However, if space does not have any equipment or mechanical parts, it still needs to be checked. The freezer or cooler shell needs to be regularly inspected for loose panels or installation and leaks. Leaks and other issues in the shell can cause too much moisture to get in which can cause a bigger issue. The door will be a main part of the cooler. Doors need to be sealed right to remove air infiltration which will increase the cooling load and cause a build-up of moisture on the evaporator and in the space on as well. A buildup of frost on the door is normal as whenever a door heater starts to fail, it will either keep it from closing or freeze shut. Proper care needs to be taken whenever placing items inside of the freezer. If the freezer is overcrowded with things, or things are in front of the evaporator fans, the circulation of air will be reduced as well as the performance of the refrigeration system.
Walk-In Cooler & Freezer Maintenance Helps Avoid Energy Waste & Repairs
Walk-In Cooler/Freezer maintenance and operation issues need to be addressed to avoid costly repairs and excessive energy use as well as the potential loss of product.
Oria Heating and Cooling is an expert in Walk-In Cooler Repair & Walk-In Freezer Repair in Ottawa. If you live in Ottawa Barrhaven Nepean and could use our services give us a call Oria Heating and Cooling today at 613 866 1869.