solar thermal

Hi, Got solar hot water tubes on the roof, don’t know much about them but they don’t seem to operate correctly, when there turned on the raydan controller temp display is very sporadic and jumps around and occasionally the relay which controls the circulation pump is constantly clicking on and...

I have a solar thermal system with a Resol Delta Sol BS Plus controller. I have recently had some works done to the system and since then it does not appear to be functioning properly and I wondered if anyone had any ideas about what could be wrong. The issue is that when the system’s pumps...

Hi All, Can someone help me identificere What size DN pipe diameter the below stainless steel flex hose is? I dont usually work with this type of flex hose and due to the corrigation i am not sure What size annular fitting I need? Is it based on the internal bore size of the external...

Hi Everyone, I was wondering if anyone knows of a way to shorten a flexible stainless steel flex hose for a Vaillant ASHP? I have previously purchased flex connection hoses from Vaillant that could be shortened using a circlip, but it would appear that they have changed their manufacturing...

Hi - first post but thought it was the right place to canvas opinion as I always find myself on here when doing various DIY jobs! I’ve just moved into a house with what I thought was a functioning solar thermal set up. I had no history of the set up when I got the house as the former owner had...

I'm putting in a completely new central heating system to feed radiators (150m2 of house across two floors - about 13 radiators) and provide hot water (1 shower, 4 sinks). For this, I'll be installing a Samsung 12kw Heat Pump and a 20tube solar thermal array (58mm hot tubes with alcohol fill)...