Solar thermal - Servicing

M

macfran

Registered User
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My Solar Thermal system for heating water has served me well these past 15 years.
It is now some long time since I've had it serviced - but I can't find anybody to service same!
Anybody know who still services these systems? Dublin area
 
I am having the exact same problem. I got a company to come out and they looked at the machine under the stairs which monitors my solar thermal panels and said this indicates the panels are not working. When I asked them to fix the panels they they announced 'we don't do roof work' - eh sorry, what do you mean I said? They clarified they won't go out on the roof to check the panels I will need to get another company to do that!
 
The roof panels are just a passageway for a liquid to be pumped through. This would be solar fluid. The only electronic item on the roof is a heat sensor (thermistor).

The machine under your stairs is the pump station.
This consists of a pump, a pressure guage, an electronic controller, an expansion vessel and a safety valve.

The likely faults would be
Pump not working
Pressure loss because of leakage of the solar fluid.
The electronic controller is faulty.

These faults can probably be remedied without needing roof work.

You could check what pressure is indicated on the pressure guage.

You could download the installation manual for the controller.
This will include information on how to test run the pump.

The system could be refilled or a faulty pump could be replaced by a competent plumber.
 
There is a possibility that after 15 years the coolant has evaporated.

I am in the Midwest and had the coolant replaced last year as after 7 years there wasn't much left.
 
Yes, I suspect that the coolant has evaporated.
My problem is getting somebody to do a complete service on the system.
Any imput much appreciated.
 
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