Vokera Excell 80SP

watertight · 9 Apr 2009

Guys,

I've recently noticed that my Vokera Excell has had delay in firing when turning on a hot water tap (about 15 seconds), after reading similar posts on here I reckon that the divertor valve needs refurbishing. In past posts you mention a service kit for the valve, do any of you have the part number for this ket so I can order one???

Additionally I have also noticed that if the hot water is not used for a period of over 15 minutes when I turn a tap on I here a noise from the boiler almost like it is filling up, or there is a restriction of flow. This occurs for about 3 seconds before remedying itself. It is also accompanied by a reduced flow from the hot water tap, again this remedies itself after 3 seconds or so.

If it helps I recently replaced both the flow and domestic HW diapragm when I initially noticed the problem with the delay in the boiler firing.

Any advice would be appreciated,

Mark

nickso · 9 Apr 2009

does the fulcrum arm move all the way out put when you turn on a tap? does it hit the microswitch properly?

DP · 9 Apr 2009

I prescribe a full service that should resolve your problems. Not many engineers do it and not many householder ask for it.

Householder often think boilers can be service in 10- 15 minutes.

watertight · 15 Apr 2009

Nickso,

Thanks for the reply, sorry I've not answered I've been away for a few days. The fulcrum arm does move but it takes a good 15 seconds or so to make contact witht the microswitch, it is very difficult to move the arm by hand, I'm not sure if this is unusual.

Do you think the sound that I discussed is related?

DP · 15 Apr 2009

I repeat, your boiler needs a service.

nicknox · 15 Apr 2009

Check your pump. Turn it down to its lowest setting and see if it stops. If it does replace it. If not running correctly it won't operate the flow switch but will in CH mode as there is less resistance to flow.

DP · 15 Apr 2009

Pump has nothing to do with movement of fulcrum arm. This movement is dependent on domestic manifold. Domestic manifold should operate the diverter EVEN when boiler is not plugged into the mains for power.

If the boiler works OK for CH and not for HW (fulcrum arm having traveled the full distance) only then would I be looking at possible pump malfunction (having checked flow manifold and diaphragm within)

BingoBongo · 15 Apr 2009

DP said:
I prescribe a full service that should resolve your problems. Not many engineers do it and not many householder ask for it.

Householder often think boilers can be service in 10- 15 minutes.

BingoBongo · 15 Apr 2009

BingoBongo said:
DP said:

I prescribe a full service that should resolve your problems. Not many engineers do it and not many householder ask for it.

Householder often think boilers can be service in 10- 15 minutes.

Click to expand...

while there at it check the flue inner hasnt corroded

diynot

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Vokera Excell 80SP

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