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Michael
Michael, Home Appliance Technician
Category: Home Improvement
Satisfied Customers: 9130
Experience:  Home Appliance Technician
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I wish to fit a Honeywell DT90E Digital Room Thermostat to

Customer Question

I wish to fit a Honeywell DT90E Digital Room Thermostat to replace a Drayton manual one. wiring advice please
Submitted: 1 year ago.
Category: Home Improvement
Expert:  Michael replied 1 year ago.
Hi Are bot the Honeywell and and Drayton Tstats low voltage?
Thank you *****
Customer: replied 1 year ago.

24....230V - 8(3)A if that helps

Expert:  Michael replied 1 year ago.
Hi please explain if both are this way?
Or one 24v volt and one 230v?
Thanks
Tech Mike
Customer: replied 1 year ago.

Drayton is currently wired as

Live (brown) term A

Neutral (brown sleeve Blue) term B

Switched (brown sleeve Grey) term C

Earth to earth

Expert:  Michael replied 1 year ago.
Hi thanks, ***** ***** have the wiring diagram for the Honeywell?
Customer: replied 1 year ago.

yes it says to

live to term A

neutral to term B

terminat switched and earth

I done the above but if you try and adjust the temp it blows the fuze on the control unit and or trips the consumer unit RCD

Expert:  Michael replied 1 year ago.
Hi it sounds like you have either a bad new T stat or you are mistaken about those two connections you can try it opposite to see if that does anything. : Live to B and Neutral to A.
let me know how that goes. But I have seen a few of these come in bad especially recently.
I will stick with you until this is fixed, please don’t forget to rate my service to you before you close this page. I will be available to you at no additional cost , you can then get in touch with me anytime by simply replying to this message.
Thank you and have a great day evening.
Tech Michael

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