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Caleffi iSolar Relay Controls
Differential Temperature Controllers for Solar Water Heating Systems
Caleffi iSolar Differential Temperature Controllers
Caleffi Solar 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 auxiliary relay can be used to maintain the tank temperature, protect the system from overheating, or use another source to heat the storage tank.

This controller features a large Liquid Crystal Dispaly (LCD) user interface with three function keys. The easy-to-use icons assist to operate and customize a solar heating system.
Caleffi Solar Differential Controller Features:
  • User-friendly operation
  • System screen LCD display with 16-segment display and 8 symbols for system status
  • Operating LED control lamp
  • 3 push-button controls
  • Attractive design and compact dimensions
  • Easy to install
Buy Caleffi Solar Controllers:

Caleffi Solar iSolar BX Delta T Controller - Pricing - Techs - Specs

Caleffi Solar iSolar2 257220A Controller - Pricing - Techs - Specs

Caleffi Solar iSolar4 257240A Controller - Pricing - Techs - Specs

Caleffi Solar iSolar Plus 257260A Controller - Pricing - Techs - Specs

Caleffi Solar iSolar Plus 257260A PV1 12 Volt Controller - Pricing - Techs - Specs

Caleffi Solar iSolar Plus 257260A PV2 24 Volt Controller - Pricing - Techs - Specs

Caleffi iSolar WMZ G1 kWh (Btu) Heat Meter 257202A G1 - Pricing - Techs - Spec

See prices and buy options for Caleffi iSolar Differential Temperature Controllers

Caleffi iSolar Techs

Caleffi iSolar PDF Manuals

Solar Heating FAQ's



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Solar Evacuated Tubes and Solar Panels


Stiebel Eltron Indirect Tanks - Heat Flo Indirect Storage Tanks
Solar Water Heating Indirect Tanks
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