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room thermostat

 
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dave h



Joined: 17 Jun 2008
Posts: 4
Location: birmingham
PostPosted: Wed Jun 18, 2008 9:19 am    Post subject: room thermostat Reply with quote
i have recentely had fitted a ferroli optimax he 38c boiler and i want to fit a room stat. the stat i purchased is the siemens rev100 model, i have been told that the stat which needs to go with this ferroli boiler needs to be voltage free. the big question is, can this room stat be fitted with my boiler..
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vince knight
Moderator


Joined: 04 Mar 2004
Posts: 1345
Location: Essex/East London
PostPosted: Wed Jun 18, 2008 8:34 pm    Post subject: Reply with quote
NO.
The stat you have is electronic and needs a supply to work.
Change it for something like a Honeywell that does not need a supply and connect accross terminals 1 and 3.

Vince
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thescruff
Moderator


Joined: 03 May 2003
Posts: 4755
Location: Bath
PostPosted: Wed Jun 18, 2008 8:59 pm    Post subject: Reply with quote
I thought the REV100 was volts free Rolling Eyes its got a battery Laughing
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vince knight
Moderator


Joined: 04 Mar 2004
Posts: 1345
Location: Essex/East London
PostPosted: Thu Jun 19, 2008 9:03 pm    Post subject: Reply with quote
If it has volt free contacts then why does the spec sheet say ac24-240v.
It does not mention volt-free. The battery is for the display I think. Question
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dave h



Joined: 17 Jun 2008
Posts: 4
Location: birmingham
PostPosted: Sat Jun 21, 2008 4:41 am    Post subject: Reply with quote
if its not voltfree contacts, how come other stats (eg honeywell cm901) say they are volts free, then stat that switches 24 -240 v.

i have been to plumbing and heating shops with this rev100 and knowbody seams to have a clue about this stat, even the wiring diagram suplied lokks a little confusing

maybe its just me

Laughing Laughing Laughing
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dave h



Joined: 17 Jun 2008
Posts: 4
Location: birmingham
PostPosted: Sat Jun 21, 2008 5:06 am    Post subject: Reply with quote
just found this so it has to be volts free ???????????

Quote:
Plastic casing with a large display which also serves as a touch screen. A hinged battery compartment cover facilitates the straightforward exchange of the two 1.5 V alkaline batteries type AA. The base can be removed and fitted to all commercially available recessed conduit boxes or directly on the wall, to be wired before the control- ler is fitted.The casing accommodates the electronics with a '& switch and a relay with a potential-free N.O. contact.[/url] The connection terminals are integrated in the base.

http://www.uk-plumbing.com/siemens-rev100-programmable-room-thermostat-p-1361.html?gclid=COye4MvthJQCFQU11Aod9guRWw[/url]
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scotb



Joined: 06 Sep 2008
Posts: 6
Location: FALKIRK
PostPosted: Sat Sep 06, 2008 11:34 am    Post subject: Reply with quote
vince knight wrote:
NO.
The stat you have is electronic and needs a supply to work.
Change it for something like a Honeywell that does not need a supply and connect accross terminals 1 and 3.

Vince
mines is on 5 and 6.
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vince knight
Moderator


Joined: 04 Mar 2004
Posts: 1345
Location: Essex/East London
PostPosted: Sat Sep 06, 2008 12:27 pm    Post subject: Reply with quote
scotb wrote:
vince knight wrote:
NO.
The stat you have is electronic and needs a supply to work.
Change it for something like a Honeywell that does not need a supply and connect accross terminals 1 and 3.

Vince
mines is on 5 and 6.



Honeywell stats dont have terminals 5 and 6 Question
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scotb



Joined: 06 Sep 2008
Posts: 6
Location: FALKIRK
PostPosted: Sun Sep 07, 2008 6:12 pm    Post subject: Reply with quote
misunderstanding here, my stats not a honeywell ,but i meant the terminals 5+6 in the boiler.even so ,what temp should the boiler be set at if i have a room stat?
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vince knight
Moderator


Joined: 04 Mar 2004
Posts: 1345
Location: Essex/East London
PostPosted: Sun Sep 07, 2008 6:51 pm    Post subject: Reply with quote
I always set to near max other wise there boiler if forever going on and off
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scotb



Joined: 06 Sep 2008
Posts: 6
Location: FALKIRK
PostPosted: Sun Sep 07, 2008 7:00 pm    Post subject: Reply with quote
cheers, will try that. Smile
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