In cold storages,after a certain time of operation,there is build up of ice on the cooler fans and a defrosting cycle must take place.
Electrical resistances are inserted between the fans to melt the ice,and the water is collected and passed through drain pipes for disposal.Some waters if the drain pipes are inside the cold storage,so consequently the water may freeze again.To avoid this problem,a drainpipe antifreezing cable is inserted into the pipe.It is switched on only during the defrosting cycle.
