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Controls
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Sun Spot Solar is an authorized distributor for Resol solar thermal controls and data acquisition products.
With over 25 years of experience in the solar industry, Resol offers proven technology to intelligently control solar thermal systems.
All Resol controls are backed by a two year manufacturer's warranty and are certified by TUV Rheinland of North America, which insures that the controller has been tested to both US and Canadian standards (cTUVus ).
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Special Order Controllers
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Additional Resol controllers such as the E and M series and other accessory parts are available through special order.
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Standard Controllers
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DeltaSol BS/1
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Digital differential controller with three temperature sensor inputs and one standard relay output. Ideal for controlling a basic solar installation having one storage tank and one circulating pump. Features include :
- 2-line illuminated LC digital display with integrated system schematic
- Flashing symbols for sensors, pumps and valves
- Easy adjustment of control parameters via three button keypad
- Frost protection, system cooling and special evacuated tube collector operating functions
- Energy measurement capability
- Dimensions: 173 x 110 x 47 mm
- Power : 115 VAC / 60 Hz
- Controller sold with (2) two Pt1000 temperature sensors.
- VBus® capable for data communication and remote service, bidirectional communication to remote modules, PCs, and data loggers. The controller can be configured comfortably by PC with the RESOL Service Center Software.
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Sales - click on 
General Information - click on 
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DeltaSol BS/3
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Digital differential controller with three temperature sensor inputs and two standard relay outputs. Ideal for controlling a solar installation having one storage tank and one or two circulating pumps (valves). Features include :
- 2-line illuminated LC digital display with integrated system schematic
- Flashing symbols for sensors, pumps and valves
- Easy adjustment of control parameters via three button keypad
- Frost protection, system cooling and special evacuated tube collector operating functions
- Energy measurement capability
- Thermostat function (to divert excess heat or supply back-up heat)
- Dimensions: 173 x 110 x 47 mm
- Power: 115 VAC / 60 Hz
- Controller sold with (3) three Pt1000 temperature sensors.
- VBus® capable for data communication and remote service, bidirectional communication to remote modules, PCs, and data loggers. The controller can be configured comfortably by PC with the RESOL Service Center Software.
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Sales - click on 
General Information - click on 
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DeltaSol PLUS
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Digital differential controller with four temperature sensor inputs and two standard relay outputs. Ideal for controlling and monitoring a solar installation having one or two storage tanks, East & West collectors, one or two circulating pumps (valves), or two separate control loops. Features include:
- 2-line illuminated LC digital display with up to (9) integrated system schematics
- Flashing symbols for sensors, pumps and valves
- Easy adjustment of control parameters via three button keypad
- Frost protection, system cooling, and special evacuated tube collector operating functions
- Energy measurement capability
- Thermostat function (to divert excess heat or supply back-up heat)
- Real time clock for time based control functions
- VBus® capable for data communication and remote service, bidirectional communication to remote modules, PCs, and data loggers. The controller can be configured comfortably by PC with the RESOL Service Center Software.
- Dimensions: 173 x 110 x 47 mm
- Power : 115 VAC / 60 Hz
- Controller sold with (4) four Pt1000 temperature sensors.
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Factory Link:
www.Resol.de
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Sales - click on
General Information - click on
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