DIY Doctor

Fitting Honeywell DT90E in Place of old Dial Thermostat

Postby M_arnold218 » Wed Oct 30, 2019 5:32 pm

I have a dial thermostat with the following 3 wires (according to the connections in it): N, L also looped through to COM, ON (and no wire in OFF).

I'm not sure how these should connect to the DT90E A,B,C connections.

Help appreciated.
M_arnold218
Rank: Labourer
Progress to next rank:
25%
Posts: 2
Joined: Tue Oct 29, 2019 8:55 pm


Sponsor

Simply Build It

Postby ericmark » Thu Oct 31, 2019 1:56 pm

http://www.free-instruction-manuals.com ... 457920.pdf

It seems A = Com
B = NO
C = NC
So you only use A and B so make the neutral safe, and other two go to A and B and really does not matter if wrong way around.
ericmark
Rank: Project Manager
Posts: 2430
Joined: Fri Oct 02, 2009 8:49 pm
Location: Llanfair Caereinion, Mid Wales.



Display posts from previous
Sort by
Order by



  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!


 
  • Related Topics