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s plan

The S-Plan or Sabotage Campaign or England Campaign was a campaign of bombing and sabotage against the civil, economic and military infrastructure of the United Kingdom from 1939 to 1940, conducted by members of the Irish Republican Army (IRA). It was conceived by Seamus O'Donovan in 1938 at the request of then IRA Chief of Staff Seán Russell. Russell and Joseph McGarrity are thought to have formulated the strategy in 1936.

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  1. Z

    Unvented cylinder with heat only boiler??

    I'd like to install an unvented cylinder in the loft. With limited headroom it would have to be horizontal. I want to keep my existing valiant condensing boiler. I currently have a vented set up. A couple of plumbers said this could work. Will the feed and expansion tank for the central...
  2. M

    Heat Only Boiler + S Plan+ + Weather Compensation Query

    Hi looking for some advice here if anyone would be so kind. Our existing system consists of an Ideal Logic Heat H15 heat only boiler paired to a 180L Kingspan Tribune XE Unvented Indirect Hot Water Cylinder (this is the Dual Stat version). Zone 1 (Downstairs) consists of 7 Radiators + Plumbed...
  3. N

    Wiring s plan from old set up y plan...?

    Hi all, so things are coming on now at last! New 250 cylinder in loft all pretty much plumbed in. F+E tank binned off, new ups pump, 2 new zone valves imstalled... Now im up to wiring up, have done the immersion, so we have hot water, ive wired in the dual stat. I have me head roughly into what...
  4. S

    S Plan heating system, heating coming on with hot water

    Hi Guys, Had a question about a S plan system. When customer turns on a hot water tap the boiler gets demand for heating as well and radiators heat up, the heating radiator sign (Vaillant Boiler) flashes on the boiler display screen. Customer has said it has been like this for a year. I have...
  5. C

    Ufh to y plan with upgrade to s plan

    It looks like I have 2 options. The first uses the existing pump, the second uses another pump to pump water exclusively to the ufh manifold and pump. I have already taken off a separate flow and return from the top of the boiler. I would like to know which would work best. Any advice welcome...
  6. G

    How to fully TRV'd an S PLAN CH/HW system

    S Plan CH, unvented, system boiler, hot water plus 2 additiional zones ( zone 1 (landing, bedrooms and bathrom), zone 2 ( downstaris livig areas) I am thinking of 1. removing the automatic by pass 2. adding TRV's to all rads using apple home kit /cloud connected. 3. rewiring the pump to the...
  7. ecm200

    Installing a Drayton Wiser 3 kit with an S plan 2 zone CH + HW system

    Objective: I have an existing s-plan plus (see below for details) heating and hot water system, with 2 independent heating zones. There is a separate programmer and a simple room thermostat for zone 1 and programmable thermostat for zone 2. I have purchased the Drayton Wiser 3 zone kit and...
  8. Lidds82

    S plan return back feed??Hi

    Hello everyone my first post so here go's. I have a combi boiler heating system which is zoned for upstairs and downstairs rads. I have noticed that when only one of the zones is calling for heat and the other one is not, the rad circuit that is off is getting luke warm. It seems that the...
  9. Bogart

    Change to S plan or stick with Y plan

    I currently have a 28mm Honeywell 3 port valve that works, most of the time, occasional blip by ball sticking or staying mid position or whatever. I have a pair of 28mm Honeywell 2 port valves and have contemplated for a while ditching the 3 port and fitting these. This obviously entails some...
  10. J

    Aquastat in S plan

    Just having a look at S plan systems. I want to know where the boilers aquastat comes in, I'd imagine all zones have to go through it as a failsafe. Cant find much info online, thanks. to know where
  11. B

    S plan - pump config causing problems for UFH

    Hi everyone Other posts on secondary circulating pumps have been partially useful but grateful for any guidance on the following: S-plan system, UFH, upstairs rads and HW in 4 story town house. 8 rads and 4 towel rails. Worcester Bosch Greenstar 30CDi system boiler. In order: boiler in...
  12. M

    immersion heater on s plan

    Is an immersion heater on a splan usually just used for back up. Incase the boiler stops working thus no flow through the coil. Wentto a house where the customer keeps the immersion on all year around. So his basically using it as a direct cylinder?
  13. king of pipes

    Valliant pure 15kw heat only on a s plan

    I will start a heating upgrade on Monday removing a old glowworm boiler and upgrading the system from a y plan to a s plan , new pump , twin channel programmer , room stat , auto bypass , new Trv's and lockshields, am I right in thinking I will need a pump overrun facility for this boiler all...
  14. AMGasServices

    S plan blowing fuse any ideas

    Hi, A friend has s plan system, unvented how water tank, ideal logic heat only boiler and potterton programmer (was changed with like for like about 6 months ago). It keeps blowing the 3a fuse in the fuse spur. Boilers been turned off at the front of the boiler (the control knob) and issue...
  15. Best

    S plan probable wiring fault?

    I replaced a programmer on an S plan system in a small bungalow and when checking zone valves operation, I discovered an existing problem. There is the usual 2 port MV for radiators, (controlled with hall stat), plus a second 2 port MV for hot cylinder, (controlled with cylinder stat)...
  16. B

    Short cycling Bosch Worcester 30CDi Greenstar - Bypass Valve?

    My first post, so apologies for any incorrect terminology I had a Bosch Worcester 30CDi Greenstar Classic Regular Boiler installed in 2014. The Boiler is used in a vented S-plan system, with two motorised valves, a manual Bypass Valve, a British Gas (Grundfos) Multi-head pump, Hot Water...
  17. A

    Advice needed : changing from Partly pumped to fully pumped S Plan

    Dear all, I have the following setup at my house for past 15 years. 1: Oil fired 35W Firebird boiler with flue in Garage ground floor 2: Convection based HW system with non-pressurized Cylinder which is fed by attic cold water storage tank . Only a Pleger Thermo mechanical valve with mercury...
  18. O

    Automatic bypass - s plan

    hello guys, I need your brain for a second. Do i need to install an automatic bypass external of the Vaillant ecotec exclusive 627 IQ ? It has an built in bypass and don’t see a reason to install another one below the boiler before the 2 zone valves. Could anyone give me an idea or a help ...
  19. S

    Upgrade Honeywell Smartfit S Plan

    I have lived in the same house for 22 years from new, I have had a few TRV's fail in the last few years and there are a few acting up now so I think I need to replace the lot. I have a Honeywell Smartfit in S Plan configuration which I believe is no longer made and difficult to get spares for...
  20. M

    Nest S Plan wiring into 2 port valves

    Hello, Looking at the nest s plan wiring diagram, what does the BW wire stand for on the 2 port valves? Thanks!
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