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RESOL controllers can do more then just control delta T. Every RESOL controller comes with a watchdog functionality built-in. But there is more than that inside of a DelatSol microprocessor controller! What about energy management and control process optimization? It has all that!

system_diagram.jpgIn the previous article we were talking about OREC - the recooling  function or Vacation Mode - a very useful function to keep the system operable (and your business profitable) and to prevent the overheating by low hot water consumption or no usage at all.

Another effective way to manage energy flow is to install multiload systems exactly how it's done in hydronic heating. Many of us have already used this technique to create dump loads like air handling units, tubing in the slab and panel radiators.

My point here is - does it create a benefit for your customer to blow away BTUs (dollars) he or she paid for in advance? Everything that we don't use - we lose! Think about it, please. Our goal should be to install a system which provides maximum energy use (not delivered) per dollar invested. Ok, back to the bolts and nuts of the DeltaSol controller.

Read more: Load PRIORITY - Using the DeltaSol Controller Features

Sun and Wind Energy Magazine LogoExclusive for our readers from SUN & Wind ENERGY magazine Solar stations without collector sensors, latent heat storage tanks, drain-back systems - there was much more on display in the German city of Munich than hgh strength just innovative collector concepts.

The world's biggest solar energy trade show, Intersolar, presented innovations in storage, stations, complex heating systems with solar heat pumps and solar heating/gas-condensation hybrids.

pdf Read the Full Article (PDF)

RESOL DeltaSol Controller features - use them to save service calls.

RESOL controllers can do more then just controlling of delta T.  Every RESOL controller comes with watchdog functionality built-in.

We previously have discussed OCX - High Summer Mode or 'Overheating Watchdog Mode' - when a few extra sun hours in high summer could be safely utilized in the solar storage by charging it over the set point, but keeping the tank temperature below the safety high-temperature limit of 95C/203F.

But what will happen if Solar Thermal system maintainers have to deal with two weeks of extra sun hours at a time our customers are away on holidays? Should we go on vacation at the same time and be back on time and ready for a service call? Not with RESOL, my friends!

Read more: Vacation Mode

Price is what you pay – Value is what you get.

I have my own story about glycol pumps which I’d like to share with all of you guys.  We'll call it "The Big Bang" - or - "When Things Go Wrong on the Job"

As a 21 years young apprentice working for Walter Zimmerly -one of the best HVAC contractors I ever met (Augsburg, Germany), I was in charge of picking up materials and tools for my crew and other crews and getting the items to the job sites the following morning.  I would typically receive a list at the end of the workday - after the various crews had already headed home.

One list contained a surprising item: “die SPUELMASCHINE” – if you translate the word to English – a Dishwasher! I looked all over the shelves and cabinets of our shop storage for a dishwasher and couldn’t find it! Finally, I worked it out; - hey we need a machine for glycol, so I need to look for a pump!

Read more: A Checklist for Winning Solar Thermal Value

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