Immersion Thermostat wire burns out | Page 3 | on ElectriciansForums

Immersion Thermostat wire burns out

Discuss Immersion Thermostat wire burns out in the Central Heating Systems area at ElectriciansForums.net

Cotherm TSD01106 Thermostat - 280mm Stem, 20AMP | eBay - https://www.ebay.co.uk/itm/183661179944

It was this company advertising on ebay to sell the control stat that included the advice I pointed out in red. Perhaps email or call them for further information. If you learn more from this company on why the advice was given would you mind sending another post so others can know too please?

Regards
Marconi

WH (Water Heating) Co Ltd
Trevor Guy
2 Horsecroft Place
Harlow
Essex
CM19 5BT

Phone: 01279641722
Email: [email protected]
 
As an eBay Associate we earn from qualifying purchases.
Total resistance was measured at 14 ohms so 3 elements in parallel = approx 42 ohms/element but total current through stats is still the same, "4kw" immersion is 3.779kw @ 230V = 16.43A. or 4.114kw @ 240V = 17.14A so new stat is just doing what it's supposed to do and not burning out?. (single phase supply).
 
Last edited:
Wrote to supplier who replied:

The thermostats are designed for single phase elements, or three phase elements wired in single phase configuration up to 4kw.
To use with elements wired in three phase configuration, the thermostat needs to switch a contactor.
So, the thermostat you received with your 4kw element is suitable for single phase use.
The 4kw element is rated at 17.5a and the thermostat is rated at 20a.
We have never had a thermostat burn out. Please check your wiring as the problem is not with the thermostat.

However, it seems to contradict the instruction leaflet (not received with the immersion - emailed after) which seems to say that higher loadings than 3kW need a contactor?

[ElectriciansForums.net] Immersion Thermostat wire burns out
 
I'm suspicious of the binary pricing of the Cotherm thermostat in the marketplace - around £12 general outlets, around £30 from reputable suppliers, one of whom publishes this footnote with the details of the stat:

SANTON S8203 THERMOSTAT TSD01106 11" 5-80'C COTHERM
This part is compatible for use with:
  • Santon DF range R25/R45/R70/R115
PLEASE BE AWARE: This a genuine Heatrae Sadia manufactured part, unlike many of our competitors.

The genuine part seems to have a 'properly approved' 20A resistive rating, so I would have thought capable of handling the 4kW load. Perhaps your leaflet covers the, dare I say, " Chinese Export" version 🤔
 

Reply to Immersion Thermostat wire burns out in the Central Heating Systems area at ElectriciansForums.net

News and Offers from Sponsors

PCBWay
  • Article
Meet PCBWay at electronica A1.163
Join us at electronica 2024 in Munich! Since 1964, electronica has been the premier event for technology enthusiasts and industry professionals...
    • Like
Replies
0
Views
265
PCBWay
PCBWay
Electrical2go
  • Sticky
  • Article
📢 Best Sellers Catalogue Now Available! 📢
Good to know thanks, one can never have enough places to source parts from!
Replies
4
Views
756
Bob Labla
B
Dan
  • Article
The Official Sponsors of ElectriciansForums - There are currently 8
OFFICIAL SPONSORS These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then...
Replies
0
Views
745
Dan
Dan

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top