Honeywell 3 ports!!!

[gassafe]

What's the crack with Honeywell 3 port valves... I put two together and the whole in the centre of the valve is pretty much the same on both 28 & 22 valves!!! Seems like a scam to me... Why run 28 all the way if there just gonna throttle it down like that!

 

[Killy Bing]

look into the bottom inlet.

that's where you don't want a restriction

 

[Roger Welton]

And this is why 2 ports are the way forward.

 

[Killy Bing]

i seriously wonder why they dont do two ports with unions. would make life so much easier

 

[Nostrum]

Because they couldn't be bothered to change the ball size inside no doubt!

 

[Roger Welton]

i seriously wonder why they dont do two ports with unions. would make life so much easier

Makes a easy swap from other makes so opens up larger market.

Would be even better if all control valves were fitted to pump valves so no draining to replace.

 

[vern]

3 port 22 mm will pass 20KW
3 port 28 mm will pass 30KW

2 port 22mm will pass 23KW
2 port 28mm will pass 30 KW

yes all the above came from honeywell tech 2 weeks ago, when I queried it!

 

[Killy Bing]

3 port 22 mm will pass 20KW
3 port 28 mm will pass 30KW

2 port 22mm will pass 23KW
2 port 28mm will pass 30 KW

yes all the above came from honeywell tech 2 weeks ago, when I queried it!

*grins*

but with the three port i bet it will only pass 10/15kw each way when both sides are in use !!!

 

[vern]

*grins*

but with the three port i bet it will only pass 10/15kw each way when both sides are in use !!!

Lol Billy, mid pos always spilt 70/30 heating to hot water they are not 50/50 as mid pos would suggest lol

 

[Roger Welton]

3 port 22 mm will pass 20KW
3 port 28 mm will pass 30KW

2 port 22mm will pass 23KW
2 port 28mm will pass 30 KW

yes all the above came from honeywell tech 2 weeks ago, when I queried it!

Different from the levels specced in there training manual.

 

[Killy Bing]

ahhh !!! never knew that

so more like 14kw for heating, 6kw for hot water on a 22mm
21kw for heating and 9kw for hot water on 28 mm

pretty much means a 3 port isn't suitable for a megaflow or oso cylinder then !!!!

 

[vern]

Different from the levels specced in there training manual.

Post em up Roger, this was 2 weeks ago when I got through eventully! I queried the guy on Delta t and pump volocity etc, he went quiet, but pulled these figs from his PDF

 

[vern]

ahhh !!! never knew that

so more like 14kw for heating, 6kw for hot water on a 22mm
21kw for heating and 9kw for hot water on 28 mm

pretty much means a 3 port isn't suitable for a megaflow or oso cylinder then !!!!

Nah most MI's insist on 2 port anyhow, Vaillant used to have a 3 port set up with their boiler and unvented though

 

[Roger Welton]

Post em up Roger, this was 2 weeks ago when I got through eventully! I queried the guy on Delta t and pump volocity etc, he went quiet, but pulled these figs from his PDF

 

[albatross]

I was once told the rest or europe and the US use two port only and 3 port are (or were originally) made just for the UK because it's cheaper and consumers in this country always want a cheap job.

I find it believable. I bet northern europe, the US and canada would turn their noses up at a 3 port valve.

 

[Roger Welton]

I was once told the rest or europe and the US use two port only and 3 port are (or were originally) made just for the UK because it's cheaper and consumers in this country always want a cheap job.

I find it believable. I bet northern europe, the US and canada would turn their noses up at a 3 port valve.

I believe there are quite a few 3 port diverters (w plan) on the continent.

 

[Nostrum]

Let's face it, 3 ports suck.

18kw for a 22mm 3 port, I'll dig for the instructions.

 

[Kev the gas]

ahhh !!! never knew that

so more like 14kw for heating, 6kw for hot water on a 22mm
21kw for heating and 9kw for hot water on 28 mm

pretty much means a 3 port isn't suitable for a megaflow or oso cylinder then !!!!

Using a 3 port valve with any unvented cylinder is pointless, as you have to have a 2 port valve as well. This is to stop the cylinder been heated when the pump over run is in operation.

 

[Killy Bing]

Using a 3 port valve with any unvented cylinder is pointless, as you have to have a 2 port valve as well. This is to stop the cylinder been heated when the pump over run is in operation.

I know, but most have coils over 10kw now.
You woulden't be aable to get the most out of them no matter the size of boiler the moment you have the heating on.

ive seen quite a few with three ports with a two port in tandem for the high limit.
would explain the shoddy recovery rates.

 

[doitmyself]

It would be useful to know what it says on the bottom three lines, under the table! Something about domestic ....

Is this document available online?

View attachment 17197

 

[Roger Welton]

It would be useful to know what it says on the bottom three lines, under the table! Something about domestic ....

Is this document available online?

Not aware of it being available on-line, it is part of the training manual I got when attending a course with Honeywell. Paragraph below is as follows

 

[Howsie]

Using a 3 port valve with any unvented cylinder is pointless, as you have to have a 2 port valve as well. This is to stop the cylinder been heated when the pump over run is in operation.

Close enough

 

[vern]

Cheers Roger, that goes back to OV days, sealed systems and pumps are more efficient these days too, I mean if you look at a WB DIV VALVE on a combi fully open is no bigger a 22mm 3 port and they pass 30 + KW lol