question about built in programmer

[circusboy]

hi

Can a built in programmer on a boiler control 2x external valvues? (hot water and heating) The boiler has one sw line connection inside, is this incoming or outgoing?

 

[mogga]

I dont have any experiance but Model number ect might help as every manufacurer will be different and it will possibly help someone help you

 

[davelerave]

prob not if you mean a basic analogue timer on front of boiler

prob 2 channel timer,2stats ,your valves and call-loop or switched live to boiler(from valves) for basic setup

boiler timer would be redundant then

depending on plumbing and boiler type obviously

 

[Spudnik]

Sounds like a combi to me with a connection for room stat.

 

[rocker]

What the 'ell is going on with al these boiler questions lately?

 

[davelerave]

i was hasty-it will depend on the model/type i suppose

 

[ringer]

Combi boiler on a S-Plan (see Lenny's sticky post) the SW line is incoming.

The programmer switches live feed on to the thermostat (for heating) this then feeds the CH zone valve. Zone valve has a microswitch which activates a feed line (after the valve has opened) switching on both circulation pump and boiler (the Sw line you mentioned).
The programmer switches live feed direct to the HW zone valve. Zone valve has a microswitch which ativates a feed line switching on both circulation pump and boiler (the SW line you mentioned)

I should know - just spent most of the weekend figuring out why my heating wasn't coming on. Turns out a motor in the CH zone valve was open circuit.

 

[mogga]

What the 'ell is going on with al these boiler questions lately?

Possibly an influx of plumbers doing 17th 2day courses or otherway round

or could it be that Plumbing forum are less helpfull to Diyrs?