Air in CH system and hot water returning to FE tank via the cold feed

[Ric2013]

At 6l/m the old UPS 15/50 had around a 3m head and the UPS 15/60 around 3.6m head.

The very old Selectric UPS 15/50 and Super-Selectric 15/60 has 7 and 9 foot head, at 6l/min respectively, so a little less. (I say 'has' in the present tense because I know at least one that is still running.)

All the above are on speed 1.

I suppose it would be useful to plot a little chart showing various types of pump curve all on the same axes, so comparisons could be made.

Why am I still up?

 

[John.g]

At 6l/m the old UPS 15/50 had around a 3m head and the UPS 15/60 around 3.6m head.

The very old Selectric UPS 15/50 and Super-Selectric 15/60 has 7 and 9 foot head, at 6l/min respectively, so a little less. (I say 'has' in the present tense because I know at least one that is still running.)

All the above are on speed 1.

I suppose it would be useful to plot a little chart showing various types of pump curve all on the same axes, so comparisons could be made.

Why am I still up?

Will put together one (chart) later today, I will include my own old Salmson NYL 33 which I installed in Sept 2000 set to speed 2 and was still running perfectly and quietly when I replaced it last November with a Wilo Yonos Pico 1-6 last November.

 

[tonyt]

A bit off thread but I love this forum! It's so good to see people discussing issues using reasoned and evidenced facts supported by experience rather then slagging each other off.

 

[Ric2013]

A bit off thread but I love this forum! It's so good to see people discussing issues using reasoned and evidenced facts supported by experience rather then slagging each other off.

That's because I'm a left-leaning liberal **** as they say on Youtube when I'm trying to make a reasoned point.

 

[John.g]

Will put together one (chart) later today, I will include my own old Salmson NYL 33 which I installed in Sept 2000 set to speed 2 and was still running perfectly and quietly when I replaced it last November with a Wilo Yonos Pico 1-6 last November.

Here it is, I wouldn't care to be running a few of these on even fixed speed 1, especially the UPS 3 .

 

[Ric2013]

Here it is, I wouldn't care to be running a few of these on even fixed speed 1, especially the UPS 3 .

Doesn't work on Libreoffice. Thanks though.

 

[John.g]

Doesn't work on Libreoffice. Thanks though.

Here's a snapshot of it & also a Zipped word copy.

 

[Ric2013]

I take it that's the old UPS and not the very old one, but it looks wrong. The UPS 15-50 starts at a 0 flow at 3.5m exactly, so how are you getting 3.76? Have you yet another IOM, as that differs from my data?

 

[John.g]

I take it that's the old UPS and not the very old one, but it looks wrong. The UPS 15-50 starts at a 0 flow at 3.5m exactly, so how are you getting 3.76? Have you yet another IOM, as that differs from my data?

You posted

I take it that's the old UPS and not the very old one, but it looks wrong. The UPS 15-50 starts at a 0 flow at 3.5m exactly, so how are you getting 3.76? Have you yet another IOM, as that differs from my data?

I got it from one of your files above... "Selectric UPS Old Style" page 1 shows speed 1 curve starting at 3.75/3.76M ?.

 

[John.g]

At 6l/m the old UPS 15/50 had around a 3m head and the UPS 15/60 around 3.6m head.

The very old Selectric UPS 15/50 and Super-Selectric 15/60 has 7 and 9 foot head, at 6l/min respectively, so a little less. (I say 'has' in the present tense because I know at least one that is still running.)

All the above are on speed 1.

I suppose it would be useful to plot a little chart showing various types of pump curve all on the same axes, so comparisons could be made.

Why am I still up?

Can you post any links (charts etc) to a UPS 25-50 Selectric, power outputs 40W, 65W & 95W. (installed in a new build house in 2005/2006), still running.
Thanks.