iSolar - Differential Temperature Controllers

Caleffi iSolar multi-functional temperature differential controller with add-on system functions. The iSolar series can be used for a wide variety of applications and has inputs for four PT1000 sensors. Preset factory defaults are defined for control of a standard solar water heating system with a second relay (some models) to divert any surplus heat. The auxillary relay can be used to maintain the tank temperature, protect the system from overheating, or use another source to heat the storage tank. 

The Caleffi iSolar EDTCU is capable of managing one collector field or one DHW storage tank. Operating hours counter for solar pump, tube collector special function, as well as heat quantity balancing.

Features and Benefits of Caleffi iSolar - Solar Control Unit:

  • System-monitoring display
  • Up to 4 temperature sensors PT1000
  • 9 basic system selections
  • Heat balancing
  • Function control
  • Thermostat function (time controlled)
  • Parameterisation and control of the system by Service Center; Software possible
  • User-friendly operation
  • VBus
  • Can be wall mounted or mounted into patch-panels
  • 3 simple function buttons for operating