Mid point 3-port diverter?

[mrcro]

Hi, I've just about read every diverter valve thread on here now as at one point I thought that was my issue but now I'm not too sure.

Any advice?

Have conventional Y set up with Drayton Flowshare2 diverter, ASL electronic programmer and stats all heated by Gloworn Ultimate boiler.

For few months had some ticking noises from airing cupboard and having read about this thought might be air in system. Continually bled all rads and opened air vents either side of pump on regular basis which let out only a little air each time. So thought maybe pump on way out and would soon have to replace.

Last week have had issues with boiler igniting, programmer all lit on LEDS and pump running but no heat to CH.

Then having tried switching on and off (very technical) noticed that boiler lit when only selecting HW, then selected CH too and rads heated. But then when HW reached temp to satisfy cylinder stat and the the whole lot turned off.

At this point thought was 3-port valve having read loads on here. Found operating instructions for valve and did tests (i.e. both stats high then CH low valve moves to HW reverse and valve moves to CH) and it appears to be moving as it should???

But now boiler not lighting at all even when just HW in demand, pump continues to run so I am confused as cannot find in any threads whether pump should still be running? Test pump speeds andsound to run ok at all 3 speeds (Wilo Gold 50)

So my thoughts are microswitch in diverter valve - so do I replace whole thing??

But would pump still be running if microswitch was at fault??

Can I replace with Hortmann using nuts and olives on existing pipework, are these all standard?

Thanks for any help.

 

[Paul Barker]

If pump is running is it fed from the mid pos valve via wiring centre or is it fed from boiler?

If the former then the mid pos valve is functioning normally.

Check wiring to boiler.

One manufacturer tends to obstruct use of other manufacturers mid pos valve by slightly varying thread and length into bodey pipe will reach.

Sometimes just need to hacksaw a little off the pipe usually have to cut off the olive and fit new nuts and olives.

Or relace like for like.

 

[seco services]

But now boiler not lighting at all even when just HW in demand,

this has nothing to do with the valve then.
as calling for hw only does not have anything to do with the valve
the call for hw gos straight from the stat to the pump/boiler.

if your pump is running constant it maybe the overrun on the boiler pcb.

 

[mrcro]

thanks for quick response!

pump is connected into wiring centre. Mid point valve do seem to move across to each side.

Pump making ticking noises again having just tried again after being off a while. Seems worst on normal setting 2 and even worse on one but seems to dispappear after a min when on speed 3?

Back to speed 2 though and ticking again?

Could the pump be at fault as per my original thoughts? Would this stop boiler firing?

Mid point vale now looks to be in mid position with spindle slightly moving between HW and CH and also has a ticking, is this normal when demand for both?

If I need to change pump I had previously tries closing gate valves each side and then opening vent screw on front but lots of water continued to come out so do I need to drain system if pump change required?

Thanks

 

[seco services]

if pump is constanly running when no demand for hw/heating then you need to check in the wiring centre where its getting its live from.

is the boiler not firing up?

 

[mrcro]

pump only runs when demand from programmer for HW,CH or both but boiler does not fire up now.

did yesterday but only when demand for HW alone, then switched to demand for CH and both ran but only until cyliner stats satisfied and it all shut down?

that's what had me thinking valve?

 

[seco services]

check boiler has not tripped and needs resetting.

if it only run yesterday till cyl stat satisfied even though heating was calling, thats a faulty micro switch inside the actuator.

 

[mrcro]

boiler not tripped re-set is in the on position.

what about this ticking/knocking from the pump again seems to come and go?

only started after I'd vented through screw on front to ensure no air in there??

 

[seco services]

if the clicking is coming and going i wouldn't worry to much.
had one like that before turned out to be a lump of solder rolling about.

boiler still not firing ?

 

[mrcro]

no not firing, pump runs, diverter valve seems to do its stuff but no fire when demand for either HW or heat sepertate of both together even the the valve moves the the appropriate side.

Would pump still run with faulty actuator?

 

[mrcro]

forgot to mention when pump running for while but no fire on boiler the top of the divertor valve (metal casing on the flowshare 2) got pretty hot even though there was no heat whatsoever in the pipes???

any significance?

 

[seco services]

if a valve is being held in heating mode or last position heating it will get hot as the motor is still energised.

 

[seco services]

is the stat turned up on the boiler etc?

 

[mrcro]

stat on boiler at nearly max (always set at around 80%) room stat up high and cylinder at 70 degress. Did move this to max but still same happens, boiler runs no ignition!?

 

[seco services]

can you hear the fan running on the boiler etc ?