Direct dry-expansion evaporation takes place in the cooling and freezing appliances and condensation takes place in air-cooled condensers mounted on the roof of the building. ISO-4 has a heat exchanger between the cooling and freezing circuits, but it was used during the period of measurement.

Make this lower case
direct dry-expansion evaporation takes place in the cooling and freezing appliances and condensation takes place in air-cooled condensers mounted on the roof of the building. iso-4 has a heat exchanger between the cooling and freezing circuits, but it was used during the period of measurement.