Programable room thermostats

breezer · 5 Aug 2006

Gasman1015 said:
breezer said:

you still need a programmer (which is what i also said)

Click to expand...

No, a programmable room stat is a programmer.

now that i dont believe (sorry)
if one day prog sta gave up its not a prob to change it to a mechaincal stat, where's your programmer now?

also a programmer determines hat time water should come on as well as heating (assuming no combi)

Gasman1015 · 5 Aug 2006

Wiring for prog stat is different than ordinary roomstat, anyway if it broke, you replace like for like.

Programmable roomstat are used mainly for combis, being single channel.

DP · 5 Aug 2006

Gasman, I have a combi boiler (Vaillant VCW 242), a cylinder, a programmer for (cylinder) HW and two programmable roomstats to control two zones.

Wiring a programmable roomstat is (virtually) the same. If a battery powered roomstat was to be used, two wires are required (red live in and yellow switched live back if four wire cable was run in). If a mains powered roomstat is used, all four wires would effect the connection- exactly the same as a mechanical roomstat (live, neutral, switched live and earth).

fitz1 · 5 Aug 2006

you supposed to have three forms of control. 1. trv. 2. room stat. 3. boiler stat. dont believe you actually have to have a time switch.boilers (combis) generally have an on off switch.

Gasman1015 · 6 Aug 2006

DP said:
Gasman, I have a combi boiler (Vaillant VCW 242), a cylinder, a programmer for (cylinder) HW and two programmable roomstats to control two zones.

Wiring a programmable roomstat is (virtually) the same. If a battery powered roomstat was to be used, two wires are required (red live in and yellow switched live back if four wire cable was run in). If a mains powered roomstat is used, all four wires would effect the connection- exactly the same as a mechanical roomstat (live, neutral, switched live and earth).

Then you have a similar setup to my own house, which is totaly irrelevant to the subject, which was you do not need an additional programmer with a programmable stat in normal circumstances, and virtually the same is not the samefor wiring.

Heating Boy · 6 Aug 2006

DP said:
A timeswitch is a simple unit that has a set timbase for two on/ offs every 24 hours.
A programmer is a timeswitch that allows different selections each day of the week.
A prostat is what breezer has already stated.

no,
A timeswitch is a single channel unit, usually used to control your heating from a combi or to control an extra heating zone.
A programmer is a two (or more) channel unit, usually controlling heating and hot water.
24hour vs 7day has nothing to do with it, neither does number of on/offs.

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Programable room thermostats

breezer

Gasman1015

DP

fitz1

Gasman1015

Heating Boy

DIYnot Local

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