TSU Range
27 models from 300 to 5000 kWh
Principle of operation
During periods of reduced cooling load or when there is no cooling load ice is built and stored within the ice thermal storage unit.
For "external melt" ice thermal storage units, there is direct contact between the ice and the water that circulates to the cooling load. The ice coils are immersed in a tank filled with water and, by feeding refrigerant or cold glycol to the coils, cylinders of ice are formed around the tubes. An ice thickness control will signal when the ice thermal storage unit is fully charged according to the desired set point, at which time the refrigeration plant is stopped. During melt-out warm return water from the cooling load is pumped through the ice tank thus melting the ice and cooling the water. The direct contact between the water and the ice assures a constant low water temperature during the entire melt cycle.


  • external melt design
  • direct refrigerant or glycol feed

Main features

  • high melt-out rates due to large surface area ice coils, effective water distribution and tank water agitation
  • prime surface steel tube ice coils pressure tested and hot-dip galvanized after fabrication
  • welded steel tank with insulation and outer cladding
  • rainproof insulated tank covers
  • suitable for gravity or pump recirculation refrigerant feed
  • fully factory assembled construction

Material options

  • hot-dip galvanized steel tube ice coils
  • steel tank with galvanised steel cladding and covers
  • extruded polystyrene insulation


  • ICE LOGIC ice thickness controller
  • analog output converter
  • water flanges
  • water counterflanges
  • refrigerant distributor for top feed
  • equalizing connection