want to fit a room thermostat to saunier Duval thelia 623

[tklondon]

Hi

just found this site while trying to find a manual.
maybe someone here can help.

I want to fit a room thermostat to my boiler, but i can not see where to connect it on the boiler.
There is no obvious connections anywhere.

If someone knows this boiler, can you please tell me where to connect it ?

many thanks

TK

 

[kevplumb]

just found this site while trying to find a manual.
maybe someone here can help.

just sent to [email protected]

stat goes across 2 & 3

if it has an anticipator heater the neutral is connected to 5

black terminal box where the mains goes in

 

[tklondon]

HI

and thanks

i just found this
http://centralheating.wordpress.com/2008/05/20/saunier-duval-thelia-623-down-to-detail/

diag 9 shows the answer (in part) in think
i compared this to a diag on the boiler and can see that these terminals go to the black terminal box as you say.

i can also see that terminal 9 andf 12 are shorted together.
Im not sure how this info relates to your answer (unless you gave the terminal numbers in the black plastic box)
If i have it wrong please advise.

 

[kevplumb]

Water OK, no heating Internal clock does not turn boiler ON, it holds boiler OFF!
(internal clock) If the clock is suspect, unplug it from the PCB. Boiler
should now operate with the selector arm set to Winte
and any external thermostats calling (out at terminal 2.
back at terminal 3).

my answer was from the mi's

so yes terminal nos in black box

View media item 16932