Ice is the number one enemy of portable temperature controlled storage solutions. It can significantly impact the efficiency and cooling capacity of cold stores. Ice is typically caused when warmer moist air enters the unit and comes into contact with cold surfaces. The water vapour in the air then turns into condensation and freezes to form ice.
Even very thin layers of ice build-up on evaporator coils, floors, ceilings and other surfaces can cause major problems with cooling efficiency and ultimately lead to component failure.
The evaporator coil is important for maintaining the required temperature so any sign of frost needs to be addressed quickly to avoid long term damage and interruption to operation.
During warm weather with high humidity ice can build up on evaporators very quickly, especially during prolonged and frequent door opening or through incorrect use of the cold store
Ice on the floor and around entrances can also cause damage to the cold store or blast freezer body and be a health and safety hazard with an increased risk of slips and falls.
Below are some tips to help customers maintain the efficiency of their cold store or blast freezer and eliminate chargeable callouts caused by ice build-up.
- Opening and closing of the doors to a cold store or blast freezer is often unavoidable, but try to minimise door openings and make sure doors are not left open for any longer than 15 minutes in any 60 minute period.
- Keep the plastic thermal curtains fitted at all times even during loading periods. It is important to remember that air can still be sucked into the cold store when the doors are closed.
- Manually defrost the unit at least once per day, more if needed.
- Clear up any ice on the cold store floor – don’t let it build into a mountain.