Honeywell DT90E

[fred812]

Hi All, applogies that variations of this question have already been asked, just not quite my setup.

I'm replacing an old rotary room thermostat with a Honeywell DT90E.

Old thermostat had a permanent live, switched live (by the thermostat), neutral and earth.

The DT90e is a two wire stat but it has three terminals as follows

A marked live in

B seems to be a neutral

C seems to be the internal thermostat switch

I see there have been other posts but not quite the same so any advice which of my four wires go where please?

Thanks.

 

[HERTS P&D]

This may help:

//www.diynot.com/forums/viewtopic.php?t=197241

Andy

 

[denso13]

A live, B switched live, make neutral and earth safe as not required.

 

[fred812]

Thanks both, I had seen that post but hadn't appreciated that com was the permanent live. Now all working as advised.