Swapping Drayton HTS3 for Honeywell L641A

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Good afternoon,

I wondered if someone could help me. I am wanitng to swap my very old Drayton HTS3 Cylinder Stat for a new Honeywll L641A Stat.

Could someone possibly confirm the wiring for swapping these two out.

The HTS3 layout is :

1 Call For Heat
2 Satisfied
C Common

The Honeywell Guide says:

Use connections C and 1 when system operation is required on temperature fall and that Terminal 2 used on Y-Plan Systems

http://www.plumbase.co.uk/link/1/h001557_272_t.pdf

Cheers
 
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Joined
16 Mar 2015
Messages
2
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1
Country
United Kingdom
yes we have a mid position valve so that makes sense.

I just wanted to check before running into any potential issues.

I'll wire it up identical :)

Many Thanks
 

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