Discuss Solar hot water controller in the Solar Thermal Advice Forum area at ElectriciansForums.net

Br716

-
Reaction score
0
Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:  American Electrical Advice Forum

Hi all

I have a viridian solar clearline v200 controller which has failed. The warranty on the unit is 2 years and it's 2.5 years old. Having spoken to them they aren't willing to help me at all and no longer stock the controller so I can't replace it. Honestly Viridian Solar are just useless. The PV inverter they installed failed too but luckily that was in warranty.

Anyway the solar thermal controler clicks on at the right time, but once it is on it doesn't trip off and will run all night.

I need some help finding a new controller for my system. It is a drainback system and I'm happy to replace the current 3 sensors.

Ideally I'm looking to spend less than £150. Does anyone have recomendations?

Thanks in advance
 

Worcester

-
Mentor
Reaction score
516
There are loads of good quality solar thermal controllers out there. and one can almost certainly be configured to your setup.

Give SeconSolar or Navitron a call. We use RESOL controllers for lots of functions other than solar - after all they only differential temperature controllers.

Controllers - https://www.seconsolar.com/controllers-433-c.asp

if it's old, its probably a non-PWM controller if new then it is a PWM controller.
 
Reaction score
292
Be careful in relation to the age of your system. Older Viridian panels and controllers use PT100 temperature sensors. The later ones use PT1000. The latter are compatible with most Resol controllers. Also PM me, I might have a controller, but not sure if it is PT 100 or PT 1000.
 
OP
B

Br716

-
Reaction score
0
The system is only 2.5 years old (clearline v200).

The odd thing is that the controller does seem to work. It will kick on at the right temperature but won't stop unless I hold the tank bottom sensor in my hand for about 30 seconds.

Today the tank temp was around 55 deg at the top. By the time I had pulled the bottom sensor to put it in my hand, the circulating cold solar feed had reduced the temp to 45deg at the top.

The the sensors on my system are USB for bottom sensor and Ethernet for collector sensor, so as far as I'm aware not an easy swap.
 
OP
B

Br716

-
Reaction score
0
The above temp drop was with no water usage btw. It has run itself right down to 35deg before from 50-60deg, but that's when I turned the system off at about 1am as it was still going flat out.

Viridian said it's likely the controller unit but if you have any other ideas please let me know.
 
Reaction score
292
They are both ehternet (network type cable) connectors. If you look carefully you will see that only two of the wires are used. It is very unusual for the sensors themselves to fail.

You could go back to Viridian with the serial number of your controller. They should be able to confirm whether it is one that uses PT100 or PT1000 sensors. This will then help with effecting a solution. There is also a sticker on the inside of the controller/pump station which has some manufacturing and test dates. This could also be useful in identifying this information.
 

johntheo

DIY
Reaction score
18
Is the system pressure 1.5 to 2.5bar??, is there a flow gauge to show circulation with solar circ pump on, possibly air in system although one would expect collector temp to be sky high.
Its easy to test the PT1000/PT100 probe, check the resistance as per table (if PT100, divide by 10), remove sensor wires at nearest JB and test with a M.meter and compare with display temperature, remove from pocket and see does resistance compare with equivalent ambient temp. Of if no M.meter does the displayed temperature fall with sensor removal. Also check differential on/off settings in controller.
 

Attachments

    You don't have permission to view attachments. Attachments are hidden.

Reply to Solar hot water controller in the Solar Thermal Advice Forum area at ElectriciansForums.net

Similar Threads

P
Hello everyone, hope your all well. So I have a little time on my hands and decided I would use it to build a small solar solution to heat the inflatable hot tub and save a little cash in the process. I've bought a couple of solar mats to heat the water and a 12v whale pump to push the water...
Replies
6
Views
571
telectrix
telectrix
S
Hello, I am looking at getting a solar PV installation (8 x 350W plus 4.6 kWh battery) and wondered how I might best take advantage of it when re-designing the central heating system, with the aim of reducing natural gas usage without spending more money on electricity from the grid. This is...
Replies
1
Views
627
Jamieo
J
A
Hi all I have a solar iboost unit on my hot water system. It's about 3 years old. It's been working fine up to now but appears to have died. The display is completely blank, no lights, no messages, nada... and we have no hot water. Must have happened today or maybe yesterday cos my boy was the...
Replies
21
Views
3K
PeterB7385
P
J
HI Folks. This is my first post so apologies if it's in the wrong location. I recently installed a 3kw Solar system with an iboost diverter which diverts electrical power to the dual elements (3kw and 2kw) on the water cylinder when there is an excess of power. I recently discovered that a...
Replies
14
Views
752
Jamieo
J
A
Hi all. I'm after some help and probably a quote. I posted a while ago but no response so hopefully this time I might get an answer or two. I have a 4kw solar system running through a solax hybrid inverter into the house and I have a 48v lead acid battery bank (8×6v leisure batteries) giving...
Replies
4
Views
536
Ajax123
A

Electrical News from Electricians Forums and Friends

E
  • Article
Want to become a qualified electrician? Look carefully at the training courses on offer to avoid wasting time and money, is the advice in a new campaign from electrical industry body The Electrotechnical Skills Partnership (TESP). With thousands of searches each year on terms such as...
Replies
49
Views
6K
Marty92
Dan
  • Article
You can now link your account with social media by going to the following page. https://www.electriciansforums.net/account/connected-accounts/ We had this feature some time ago but I removed it when Facebook was found to be selling the data they collected without informing the users of what...
Replies
0
Views
2K
Dan
Dan
  • Article
There was a dodgy advert, typical clickbait, showing "how to save 90% on your electricity bill" which was not the case and it was actually showing some dangerous wiring tactics. Read the actual threads here:- What should be the code for this - C2 or C3 -...
Replies
37
Views
8K
Jurassic Sparks
Jurassic Sparks
James
  • Article
The Go Plus hot tub is being recalled because you could get electrocuted taking a dip, according to press releases from the Chartered Trading Standards Institute (CTSI). An Amazon spokesperson said: "Safety is a top priority at Amazon. "We require all products offered in our store to comply...
Replies
6
Views
3K
Dave Appleby
D
Dan
  • Article
Posted on behalf of @CKI:C.K-Tools Carl Kammerling International Ltd, also known to as ‘CKI’, are the company behind the C.K Tools brand. Founded in Germany in 1904 and with roots stretching back to 1790, we provide a wide range of hand tools, tool storage, power tool accessories and...
Replies
2
Views
4K
telectrix
telectrix

New Posts (Please Reply)

Search Forum

Top