But I think the OP was asking about something labelled Pl which is probably Permanent Live.
MEANWHILE...
BACK AT THE POINT IN QUESTION...
(who took this thread off topic by talking about Pi??? :innocent )
From previous track record of posts....
I don't think the OP has a clue what he is asking..?!?!?!? :coat
Lets consider the facts:-
1/ There is a question about a Honeywell wiring centre..
2/ The OP has access to the internet.. (proven by virtue of the the question posted on here!!) :B-
3/ A quick internet search for Honeywell easily brings access to their OWN site ..
which includes an abundance of info and help about products and wiring...
4/ One such document is the the Honeywell Wiring Guide..
which can be found here..
http://www.honeywelluk.com/downloads/Useful-Documents/
5/ A brief read of this document shows on numerous pages...
a terminal designated PL..
with a little line representing the wire going to the "Live" connection at the "Pump"..
6/ So what conclusion would a competent person come to...
with the evidence of "Live" "Pump" & "PL" all at Honeywell's own website.....
7/ Yep you are correct..
the answer is...
I had better ask on a forum what "PL" stands for!!!!!!!!!
headbang headbang headbang headbang