Honeywell v4073a valve noise

[johnthom]

For those interested I have refitted my 28 year old HEAD unit to my new valve.....(interim as I am busy and do not want to drain down in the cold weather) ............. and the noise whilst not totally erdicated IS much reduced. So for all us conspiracy theorists out there Honeywell HAVE hanged something ( or their tolerances are not what they once were.......)

I wonder if it's just the weaker spring in the old head leading to more gentle closing when falling back to DHW Only. Is there a noise when the valve is crossing the other way onto CH Only?

 

[Bennachie]

No. Silent apart from DHW only required. I see from a US blogger tht the problem is widespread in USA and that Honeywell 'are not aware of it'!!!! All sorts of cunning solutions over there but not available here without exhorbitant shipping fees. Its because as soon as the motor in the valve is 'released' by the micro switch the pump starts and slams the ball into its seat. There needs to be a delay between the de-energising of the stalled motor and the external power feed from the tank stat...........

or

as I think may case is with the old head, the clearances are reduced in the pivot providing a more damped action.

Internet trawling provides a lot of information.............

 

[ShaunCorbs]

No. Silent apart from DHW only required. I see from a US blogger tht the problem is widespread in USA and that Honeywell 'are not aware of it'!!!! All sorts of cunning solutions over there but not available here without exhorbitant shipping fees. Its because as soon as the motor in the valve is 'released' by the micro switch the pump starts and slams the ball into its seat. There needs to be a delay between the de-energising of the stalled motor and the external power feed from the tank stat...........

or

as I think may case is with the old head, the clearances are reduced in the pivot providing a more damped action.

Internet trawling provides a lot of information.............

be easier to change the valve to a different brand tbh drayton are fine no noise

 

[Bennachie]

Trying to avoid draining down until the spring when there are other bits of pipework to do.
Trying to save the inhibitor...............:8:

 

[DirksPlumbing]

But, with most pumps, if the pressure increases then the flow rate, and consequently the velocity, reduces.

Right but wrong. The overall flow rate reduces because there are less easy paths to go. But in the remaining easy paths the flow rate increases because off the higher pressure. Possibly have a look at the Danfoss RA DV valves. They have been invented to overcome exactly this problematic.

 

[DirksPlumbing]

No. Silent apart from DHW only required. I see from a US blogger tht the problem is widespread in USA and that Honeywell 'are not aware of it'!!!! [SNIP].

At current I am under the impression that Honeywell is having difficulties to recognize problems in all areas. Since 2013 I continuously have to change Honeywell parts that are either still under warranty or just out of warranty.

A lot of them I have done on my own accounts including the parts. "Not amused" is a good description. I love my profession but not to this degree.

 

[DirksPlumbing]

That valve had just been 13 month fitted. Yes I had modified it (top right to provide a temporary demand signal) but after it struck. All it was switching was a new Worcester Camray and an Alphal 2L 15/50.

CM9x7 is another soar spot. And I am not talking about the occasional random flame symbol not matching the demand signal.

 

[Bennachie]

Interesting my Honeywell prog thermostat often says it is calling but nothing happens.........
On delay timer is the answer to 'knocking balls', (snigger :wacko🙂 but why something that is available easily in the US for approx $5 delivered (to US address) should sell for £25 to £30 in the UK is beyond me. Finding a supplier is hard enough! Sadly most US wont ship to UK unless many dollars changes hands, so if anyone knows a source of TD69 solid state, on-delay timers in the UK at reasonable price..........................?

 

[ShaunCorbs]

Low Cost Adjustable Solid State Timer, Delay-on-Make, Delay-on-Break

but have a word with these guys first

RS Components | Electronic and Electrical Components

 

[Bennachie]

Thanks shaun RS was my first port of call but £30 if they have one. They have relays but not in-series timers

They are $5 stateside, on supplier offering 5 for $10! Rip off Britain or what?

Omega £30!!! with delivery and a 5 week lead time!!

I don't understand, we must use them over here somewhere......