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Caleffi iSolar Techs and Specs
Differential Temperature Controllers for Solar Hot Water Heating Systems
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Standard operation functions:
- AT Control
- When the switch-on difference is reached, the pump is activated until the differential temperature
drops below.
- Maximum Tank Temperature
- When the adjusted maximum tank temperature is exceeded, the pump switches off.
- Collector Emergency Shutdown
- If adjusted collector temperature is exceeded, the solar pump is switched off.
- System Cooling
- If the temperature rises to the maximum collector temperature the solar pump remains on until the
temperature drops.
- Minimum Collector Temperature
- A minimum set temperature which must be exceeded before the solar pump is switched-on.
- Antifreeze Function
- If the adjusted temperature drops, the solar pump is switched on to protect the fluid from freezing.
- Tank Cooling Function
- In the evening, the solar pump continues running until the storage tank is cooled down.
- Tube Collector Function
- The controller measures an increase of heat rise in the collector and adjusts operation for
maximum efficiency.
- Heat Generation Measurement kWh (BTU)
- The heat generated is measured by the flow and the temperature of feed and return sensors.
- Operating Hours Counter
- Operating hours counter stores the solar operating hours of the respective relay.
- Manual Operating Mode
- For control and servicing, the operating mode of the controller can be switched manually.
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Technical Specifications:
- PC-ABS plastic housing
- Indoor only protection type
- Wall mounting
- LCD display with symbols and text
- Three soft push button interface
- 4 temperature sensor inputs
- 1 or 2 electronic or standard relay outputs
- 2 (1) A 115V switching relay capacities
- 115V - 60Hz power supply
- V-Bus interface
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