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valve

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  1. C

    controlling CH 3-port mid position valve with a 5V DC SSR

    I'm currently controlling a CH 3-port valve using a 5V DC SSR to switch a Finder 12V DC spdt 250V AC rated contacts eletromechanical relay. The 5V DC SSR is a Meder SIL05-1A72-71D & has a coil draw of 50mW (10mA). This SSR is controlled by an Arduino which has a max draw of 40mA per I/O pin...
  2. P

    Underfloor heating via an s plan system

    hello Can anyone help am looking for a diagram I have an splan system with an extra valve for the u /f heating
  3. M

    Valve on Y Plan

    I was asked to wire up a boiler / pump / valve / 2 channel 7 day programmer / frost stat (no room stat) today "connect the boiler up, its a Y plan" However it has caused me some confusion. The valve has the following connections over 2 seperate flexes On one flex- blue (neutral) brown...
  4. D

    worcester greenstar ri Y-Plan

    Hi all been called out to a boiler replacement with the above boiler. The problem is it wont run on heating only. have check wiring and all I can spot is that from controller there is no wire going from HW OFF to cylinder stat terminal 2 and grey on valve. Any thoughts and no spare cores in...
  5. I

    Need Help Unvented cylinder with one 3 port valve.

    Hi, i have changed my hot water cylinder for a Megaflow hot water cylinder. now having problems to wire this thing in. the programmer i have (Tempus 7) has only got HTG on and DHW on options, so i it's only for 2x2 port valve system?!?! originally i have only 3 port valve at the moment, looking...
  6. T

    running more than one thermostat off one zone valve

    hello all im carrying out some work in a social housing building and they have problems with massive gas/electrical bills (£4000) a month, its a 3 storey building with 10 self contained bedrooms with en suit all with at lease one radiator in, they have recently had there boiler change by...
  7. G

    relay advice

    Hi, I m dealing with a heating system with 2 separate heat sources, a gas boiler and a wood burning stove. Both heat water and radiators but need to be able to work together or independently. The system has a motorised valve on heating and another for water. Firstly I need to be able to operate...
  8. J

    heating connections

    so I've got an s plan heating system in 3 story house, separate valve and stat for each floor, then the hot water valve and then another valve for underfloor heating in extension. altogether 5 valves. so this wont work on standard 10 way honeywell junction box right? I'm learning these systems...
  9. T

    Wireless stat, pump and valve.

    Hi there. I've not come across this before and I'm sure it's probably something simple but I thought I'd check here to be sure, I have to connect a wireless stat, pump and a valve, but the plumber tells me it's just doing the heating so it's sort of the same as a combi system. How would I go...
  10. A

    central heating nightmare

    Hi I wonder if someone can help me I'm having trouble getting my heating and hot water to come on at the same time I've recently replaced the pump and the 3 port valve The old 3 port valve was a Honeywell mid position v4073a And the new one is siemens 3pmp-v22 but i cant seem to get it to...
  11. jackhammerJIM

    working with too many plumbers

    been doing a lot of subbing to a heating firm recently , teams of 4 plumbers and one spark installing biomass boilers . the latest load of nonsense from them ... spark : why is there 3 x 2 port valves on that s plan ? plumber : the 3rd valve is a safety feature for the unvented cylinder ...
  12. T

    Bosch proportional valve amplifier

    Been trying to find a decent datasheet on the internet to no avail. I am dealing with a Bosch type 2M2.5-RGC2. It's used to control the speed of a conveyor driven by a hydraulic motor. It has a variable voltage from a pot to terminal 2. What appears to be an enable signal to terminal 4. A 24v...
  13. A

    Drayton 3 port valve - confirmation of fault?

    Called out to newly installed boiler, using the old Drayton MA1 3 port valve. When HW is on, CH is also on. Checked all connections/wiring, all seemed connected correctly. But, getting voltage at the white cable (HW on) at the valve. Clearly something wrong there, as there should be no voltage...
  14. C

    help with central heating s plan plus newbie

    Hi there, I'm currently in my 4th year, been given a job which includes wiring up the heating. Don't have any real experience in this area soo help would be much appreciated. 2 combi boilers feeding 2 seperate heating zones with rads, a underfloor heating zone and a hot water circuit which is a...
  15. HappyHippyDad

    Where to find a ducting 'Y' pice with a non return valve??

    Does anyone know where I can get a ducting 'Y' piece with a non return valve? I have looked all over the internet and cant find one, perhaps the answer is to use both? I need one of these: which has this: Cheers all...
  16. E

    S plan system with 2x under floor heating zones

    Good evening all, I'm first fixing property and customer is having splan system with one rad heating zone, hot water and an additional 2x under floor heating zones. I've taken a thermostat to 3 different zones. What I'm not sure of is how many cores will I need at the programmer? The under...
  17. O

    Motorised valve 2 port

    Hi all. I am wiring a 2 port motorised valve and would value advice re. wiring of aux. switch. Instead of having a permanent feed on orange (or grey) wire, could I loop a feed from the valve motor, that is to say, use the "feed" from the programmer that energises the motorised valve to feed one...
  18. C

    cyclinder stat blowing fuse

    Called out by a plumber I do work for. He had recently installed a new zone valve and chaged CH/HW programmer. A fortnight later the customer calls him because he has lost all heating. Plumber turns up, realises 3A fuse has blown in switched fused spur. He can't change it without it blowing...
  19. S

    Water heater/thermostat

    A customer of mine has got problems with their water heater. They say it seems to only come on if the heating is on and so on days like today whens its too warm the heating does not come and so they have no hot water. They got in a plumber to have a look but it always seems to work when they...
  20. G

    Valves on a combi volt free

    Hi all, got a combi boiler with volt free switching for the central heating all working fine, I put a conservatory up and put underfloor heating in , I asked the plumber to put a value on the UFH pipe and the CH Pipe so I could control them separately , from a salas wireless programmable stat...

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