Shop Resol solar controller DeltaSol ES. Free delivery on eligible orders of £20 or more. Differential temperature controller DeltaSol ES, complete pack with 5 sensors. Order no.: 60 €/unit.»Please login to view our prices. immediately. Home; Our Product; Resol Solar; DeltaSol® ES. DeltaSol® ES. es. Contact Us: 24 Cosmos Road Primrose Germiston Opennig hours: Mon-

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It can also be found on the Wiki section of the website at http: This topic is detasol to prevent it becoming an eternal thread, as it is intended to be an FAQ only. It will be updated whenever suitable topics arise. What are the differences between the solar controllers?

RESOL STA – Translation into French – examples English | Reverso Context

The Resol DeltaSol A is a basic solar controller with one output to control the solar pump and supplied with two sensors. Simple setup with adjustable DeltaT setting and selectable freeze-protection only. The DeltaSol Ax adds adjustable maximum and minimum temperature operating limits and a manual operation switch useful for setting up and testing.

Also has RS and VBus interfaces. The DeltaSol M does everything except tie your shoe laces – but you may spend as long programming it as installing the system itself:: Additional parameters are used to program the functions and setpoint temperatures hence there are fewer direct equivalents of program parameters when compared to the Resol controllers in the table.

The table below attempts to compare and illustrate the major differences between the Resol range and Navitron TDC3 controllers together with the common control parameter detasol and values.

It should be noted that Resol products are under continuous development and parameter values can be subject to change between shipments. Not simultaneously Note 2: They can be readily extended using any twin flex or bell-wire.

It is best to use screw-terminal blocks choc-blocks with delatsol built-in wire protectors to prevent damage to the wires. How hot will the water get?

The controller monitors the temperature difference between the panel manifold and the lower cylinder sensor. The circulating pump is triggered when the difference exceeds the DTO setting say 6 degrees The pump will stop once the difference drops below the DTF setting say 4 degrees.


This means that if the cylinder base temp is 25C then the pump will start to run when the manifold temp reaches 31C. As the water circulates and gives off its energy to the stored water the temperature in the cylinder will rise and the circulating water will drop. Once the difference drops below 4 degrees then the pump will stop. Therefore the actual cylinder temperature achieved will depend on the amount of solar radiation received by the panel on a given day and the volume of DHW used by the household in the meantime.

Do I need a Heat Dump? OK – so this is the controversial one and has been the subject of much debate on the Forum – just put Heat Dump into the Search box The usual recommended cylinder temperature is degrees C for a conventional DHW system. However a well designed solar system has the potential to exceed this during summer months – especially, and most importantly, when the householder is away for any length of time, e.

If a solar system is designed so as to never exceed 65 deg C cylinder temperature under any circumstances without a Heat Dump then its performance will be marginal and it is unlikely to result in the expected fossil-free summer months of DHW production.

It has been confirmed that the Navitron supplied cylinders are guaranteed by the manufacturer to withstand and be functional to 95 degrees C.

Do not assume that other manufacturers will automatically offer a similar guarantee! However, anyone who installs a system that is ‘permitted by design’ to operate at elevated temperatures must install a Thermostatic Mixing Valve TMV on the outlet of the cylinder.

This is essential to prevent a virtually guaranteed scalding injury that would result from skin contact with DHW at elevated temperatures. Anyone who doubts the wisdom of doing this should refer to the Thermostaic Mixing Valve Association website at http: A professional installer should be aware that there would be little chance of a defence in court for scald injury claims resulting from an inadequately controlled solar system since a competent installer should know that a well-designed solar system is potentially capable of producing dangerously high DHW temperatures under ddltasol insolation conditions.


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That said, you need to decide what temperature you are prepared to accept as stored water. Consider also that where the cylinder is permitted to operate at elevated temperatures, the solar loop will be DTO degrees hotter. This may have implications on long term reliability of components especially the pump. It may well be that you prefer to dissipate the significantly excess thermal energy via another route such as a dedicated Heat Dump or existing CH radiator s.

Before this point, there is a need to reduce the temperature of the stored water – via a heat dump. AHO should ideally be 0. If the Heat Dump is incorporated utilising the boiler coil with the boiler inhibited via a relay, it is essential that both boiler and solar systems are supplied from the same socket or DP switch-fused spur.

This is to prevent electrical danger arising from only one ‘half’ of the linked system being isolated during maintenance work.

This method is easy to implement with boilers having a common-neutral connection between boiler and system pump. Many modern condensing boilers have complex control electronics with the system pump electronically controlled and fed direct from the boiler control PCB. Modification of most of these is not recommended!

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However the Alpha CDR models are known to be compatible and rs system schematics are available to suit. A new file covering S-Plan based system schemes covering the Alpha CDR range of modern condensing boilers is now included. I contacted Vaillant earlier in with a view to adding the EcoTec Plus to the compatible wiring schematics but they failed to respond to my email!