Vokera Excell 80SP -Intermittent hot water

[jack_s]

auto air vent just above the pump on the right

Do you mean just remove plastic cap of Auto Air Vent Bottle, or more ??

I have seen drip of water coming out of that cap (which has a hole) occasionally previously, hope that is not another problem !!

 

[kevplumb]

no need to remove it just slacken it
if its leaking it needs cleaning

hardly a major problem

 

[jack_s]

no need to remove it just slacken it
if its leaking it needs cleaning

hardly a major problem

Are you talking about the plastic cap or the whole metal bottle ??

 

[jack_s]

Just changing the DHW Diaphragm, just want to check something.

Took off old diaphragm, didn't notice which way round it was, as got distracted checking if it had a hole

The bowl of the diaphragm faces the plastic plate with pin, doesn't it ??

The plastic plate sits in that bowl, doesn't it ??

 

[kevplumb]

View media item 26411

 

[jack_s]

View media item 26411

Which side of DHW diaphragm faces out, can't see on that picture ??

 

[nickso]

side with pimples faces in, plastic part fits into the smooth side.

 

[jack_s]

I will also change the DHW Stuffing Nut, as I have leak/weep from this.

I assume you just replace nut (which has bit of silicone grease inside) & push DHW diaphragm pin through (??).
Nothing more.

Just wondering as I think there is mains pressure on other side inside valve, so surprised this is enough to seal, pin pushed through plastic seal in the nut.

From what I can see just those 2 parts in DHW valve to replace from vokera T0019 service kit (see pic below).

Untitled

• jack_s
• 23 Sep 2010
• 1

 

[DP]

& push DHW diaphragm pin through

What are you on about. Do you see a hole in the diaphragm? Are you not going to clean the spindle and lube it?

 

[nickso]

he means the hole in the nut i think.

just remove and re-fit mate. as danny says, clean the ****e off the pin too.

 

[jack_s]

& push DHW diaphragm pin through

What are you on about. Do you see a hole in the diaphragm? Are you not going to clean the spindle and lube it?

I mean the nut.

Of course I'm going to clean & lube it.

 

[jack_s]

he means the hole in the nut i think.

just remove and re-fit mate. as danny says, clean the s***te off the pin too.

Yes, I mean nut.

Just surprised that's good enough to seal moving part with mains pressure inside unit, must be tight fit.

 

[nickso]

he means the hole in the nut i think.

just remove and re-fit mate. as danny says, clean the s***te off the pin too.

Yes, I mean nut.

Just surprised that's good enough to seal moving part with mains pressure inside unit, must be tight fit.

not a particularly tight fit. you will see when you remove it.

i still get amazed by how wobbly some pushfit connections can be and still hold water.

 

[jack_s]

Thanks guys.

Sorry to be picky about checking things, as you see how easy it is to read things wrong way.

 

[jack_s]

I've tried repressurising boiler, but pressure on pressure gauge is not rising.
(Both CH flow & return valves under boiler are closed.)

Any ideas why ?