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  1. P

    Can I replace a sunvicSDM1901 actuated valve with a sunvic SDMV2304

    The SDM1901 is now almost obsolete. The SDMV2304 looks like a drop in replacement. I have a boiler/storage tank setup with a 3 port divert valve for heating/hot water. There is no room stat as all rads have thermostatic controls. Is this a safe replacement?
    • PhilDesanex
    • Thread
    • america replace sunvic usa valve
    • Replies: 0
    • Forum: USA
  2. B

    How can I fix a banging noise in CH system- 14 years new drayton and sunvic valves -sealed system?

    This started last night at 11.25 and has me completely flummoxed. A banging noise that is hard to track down. When I'm in Bathrooom that has airing cupboard it seems to come from hallway when in hallway it seems for come from cupboard. The system is a grant boiler in an outside house, purpose...
    • bomitie
    • Thread
    • america banging drayton fix hot rads new noise sealed system sunvic system usa valves years
    • Replies: 3
    • Forum: USA
  3. K

    Help!? Replacing Old Sunvic stat w Nest Learning Thermostat 3rd Gen - Heat only system

    Evening all, Apologies if this has been covered in another thread - I've never called upon a forum before! šŸ˜¬ We're in the process of upgrading our old heat only boiler with a new Ideal Logic heat only boiler. So, feels like an opportune time to upgrade our ancient (albeit reliable) Sunvic...
    • Krissyboy87
    • Thread
    • boiler existing heat heat only help learning nest old replacing sunvic system thermostat
    • Replies: 3
    • Forum: Central Heating Forum
  4. I

    2 port sunvic diverter valve not activating

    I have a sunvic 2 port diverter valve on a tribune HE hot water tank, it's not activating when hot water needs heating. I've replaced the thermostat, but have to hit the diverter valve a few times to get it to activate. Any idea what may be causing the motor to stick as it is working just needs...
  5. F

    Advice on Sunvic 3 port valve

    Hi All, I'd like to swap my Sunvic 3 port motorised port for a Honeywell. The issue I have is that the Sunvic has 4 wires and the Honeywell has 5? Anyone know if this can be done? Thanks
  6. F

    Advice on Sunvic actuator

    Hi All, I've need to change the actuator on a three port 4 wire. The actuator that is on it currently is a Sunvic SDM1901. Is there an equivalent make I could use without having to change the pipe work and follows the same wiring? Thanks
  7. R

    Sunvic MOMO 3 port problem

    I have a problem with a fairly new Sunvic SDMV2304 Motorised Mid Position 3-Port Valve (MOMO). It won't completely shut off the DHW and consequently the cylinder water is too hot. I have checked for complete rotation and this is fine. If I switch on the valve to make a complete rotation it then...
  8. J

    Sunvic motorised valve 3 port query

    I was having a few problems (rads on with only water switch down). Engineer came and fitted a new three port valve and acutator (was Danfoss, fitted Sunvic SD2701). the Sunvic has a metal lever, one side says normal use, the other end say flushing only. The metal lever can be locked on either...
    • JessDay
    • Thread
    • 3 port heating lever motorised motorised valve normal query sunvic valve water
    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  9. D

    Draining Cental Heating System To Replace Complete Sunvic 3 Way Valve Assemly.

    Hi, I will need to drain down the CH system to install a complete new Sunvic motorised 3 way valve assembly. The only drain tap I can find is on the pipework adjacent to the bathroom radiator. This radiator is permanently hot whenever the hot water system is activated--whether the CH is 'on' or...
    • duttonmark
    • Thread
    • complete draining heating heating system replace sunvic system valve
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  10. gassafe

    Satchwell 2 port replacement help - wiring

    Gotta replace this ancient 2 port... Is it compatable with a modern 28mm Honeywell 2 port, can't find anything online! Wiring is obviously different according to the label! It's a satchwell 2 port on the cylinder return, the boiler is floor standing gravity set up where the boiler only fires...
  11. U

    Old Sunvic TLX thermostat

    Hi all, We've got an old Sunvic TLX 2000 electromechanical thermostat on the wall in our hall. It looks considerably older than our combi boiler (Ariston E-Combi) which is probably less than 5 years old. How can i tell if the thermostat is wired up to the boiler or if its a relic that just...
  12. phil hair

    changing randall 4033 programmer/ timer to sunvic 2000

    hi, i am going to change my broken randall 4033 timer to a sunvic 2000 timer. i have found a conversion chart which gives the alternative locations for the wires from the randall to the sunvic, ie, 7 to N, 6 to L,ect. There is a birdsnest of wires in the back of the randall, and i was...
  13. N

    Sunvic Motorised Valv Actuator Replacement DM5601/SD2701

    Hi, I had problem where my central heating was tripping the circuit breaker on my house. A heating engineer and electrician resolved by replacing the timer and actuator. The original actuator was a Sunvic DM5601 and had 5 wires. The replacement is a Sunvic SD2701 with only 4 wires. Since then...
  14. H

    Sunvic 3 port valve

    Hi ... I'm changing a 3 port Sunvic valve (MK1453). I've read that instead of replacing the body you can replace just the inners as this is held by 4 screws. If this is possible, will the system need to be drained first or is there a 'shortcut' ? Thanks in advance for any replies.
  15. M

    sunvic motorised valves

    Hey chaps, I am in need of some help. I have the above motorised valves on a system and cannot figure out or find out any where what the wires are. It has yellow, white, orange and blue and green and yellow. No grey on it. So which will need to be wired into the live in the wiring centre? Also...
  16. W

    Radiators cold when boiler fires up on automatic on/off settings

    My boiler (Potterton Suprima 60) fires up OK but the radiators stay cold. It happens when the heating controller is on automatic on/off time settings. The pipes close to the pump (a 20+ years old Grundfos) and Honeywell (new) diversion valve do get hot though. The controller is a Sunvic...
    • wongo
    • Thread
    • automatic boiler central heating system cold fires oil radiator radiators settings sunvic valve
    • Replies: 10
    • Forum: Plumbing Jobs | The Job-board
  17. B

    Sunvic relay junction box connected to Drayton MA1 Valve

    Having been told by Sunvic and Drayton that I couldn't wire a Drayton MA1 mid position valve to a Sunvic RJ 2801or 2802 relay junction box I set out to do just that! After some head scratching with the RJ wiring diagrams the result was amazingly simple and was fully tested in all the Htg and HW...
  18. J

    replacing a Sunvic TLX 7506

    We recently moved into a house that has a Sunvic TLX 7506 Thermostat connect to a Vaillant combi boiler. I am looking to upgrade it to a programable one so I can set timers etc. and I was hoping to get some advice as to what models would work with my current equipment. I was hoping to be able to...
  19. B

    Sunvic 207 Programmer & Main HE30

    I'm having a clear out and came across an unused Sunvic 207XLS programmer, my question is can it be used with the Main HE30 boiler?
  20. M

    Sunvic motorised valve help

    Hi. I am hoping for some help (I'm afraid I don't know much about plumbing etc but will give all the info I know). we currently hAve sunvic Dm5601 motorised valve which has become unreliable - it seems the pin gets stuck preventing the head from turning it but even applying grease has not...
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