Protect and Perfect Your Installations

From our series on best-practices with RESOL DeltaSol Controllers.

RESOL controllers include a built-in control process optimization algorithm.  This optimization is based custom setup options - so the installer should learn to recognize and use these features effectively.

One of the Special Functions for control optimization is OTC - Tube Collector Special Function.

Control Optimization

The heat produced in the tube will not freely rise to the sensor well if the collector is installed horizontally. The resulting delay in the temperature readings necessary to start the circulator could create a problem, especially for systems with large collector arrays.

But this will not happen with the RESOL controller , my friends! The use of OTC function for that application will do the trick.

Marketing for Solar Thermal Installers

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!

In 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.

Exclusive 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 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.

Read the Full Article (PDF)

The UNISTAR 2001-A just got a Filter Kit!

In the last newsletter I told my story about die SPUELMASCHINE (aka "The Washing Machine" aka "When Things Go Wrong on the Job" aka "The Big Bang") which resonated to me back with multiple phone calls, emails with testimonials from my customers who made the switch and are using ZUWA pumps now.
 
Here are just a couple of them, we'll publish more soon!

I appreciate the German quality of construction and design of the ZUWA Solarcheck. Europe and Germany in particular has lead the world in solar thermal installations and the ZUWA Solarcheck's development comes from this experience.

It absolutely works great, is ergonomic in all respects, and saves my time. It goes hand in hand with the quality all solar components I install.(between you and me, I was at a XXXXXX class in which they introduced their own solar fill tool, which while similar, was half as well built but cost 70% more.)

Bob Doyle
Giranda Energy Systems LLC, WA USA
www.girandaenergy.com

The smallest powerful ZUWA Drill Attachment pump is now available with Heavy-Duty Filter Kit as a very handy accessory. Check our Toolbox , what is in yours?

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!