Clogs cause water to pool and freeze over time.
Walk in cooler evaporator coil freezing up.
Is at 39 degree f.
If airflow is blocked you ll end up with a frozen coil.
First it is a walk in chiller using r22 when it ice up it starts from the bottom until it cover the entire coil and the unit is a chiller it does not carry a defrost cycle.
This was a service call on a walk in cooler that was iced up i found multiple problems with the system including a very dirty evaporator coil and a refrige.
The walk in freezer or walk in cooler is a major part of many convenience stores cafeterias and restaurants.
In a properly functioning system the evaporator circulates refrigerant vapor at about 40 degrees the optimum temperature to extract heat from the airflow passing through the.
Moisture from the air freezes onto the evaporator coils the cooling coils in the freezer and forms an insulating barrier to heat transfer.
Why an evaporator coil freezes the first concept to understand while troubleshooting a frozen evaporator coil is that the coil is supposed to be cold but not freezing.
If the thermostat is set below the unit s minimum designed temperature or if your thermostat is simply faulty then excessive evaporator coil icing may occur.
Next check for a clean coil and clear drain line.
Your evaporator coil could also just be dirty.
If the walk in cooler is freezing up the first step is to melt ice off the evaporator and then check that the evaporation fan is running and rotating correctly.
One other thing i notice the low side pressure would go down to 25psi at times when the room temp.
This is something an experienced technician can diagnose and repair.
Improper air flow check to make sure there is nothing blocking the return air vent this is the opening where the air goes across the evaporator coil and returns to the unit.
5 reasons spot cooler coils freeze up and what to do about it.
The evaporator coil is the part of your cooler that is responsible for actually removing the heat from the unit.
Each evaporator has a defrost cycle to melt frost ice that has built up on the evaporator coils.
Ice can also develop near your drain if your drain line becomes clogged.
Walk in cooler and freezer problems like compressor failure and failure to maintain pressure can result in costly loss of products inside the cooler.
If you notice ice build up around your evaporator coil your freezer may be experiencing a fan delay relay failure.
