Pick Up Factor- AGAIN

GW · October 10

I realize this has been covered a million times. I thought for sure someone once said 1.33 was on the conservative side; if the mains were fully insulated, it was once said you could easily drop. I don't recall how much though, down to 1.2 recall.

Gotta guy with a dead boiler, and if I downsize a smidge I can get it up and running in a week. Or it's a 2-3 week wait for the Carlin 201GAS

Thanks for your opinion

GW · October 10

Context- rads are 772 EDR. Thinking of a W/M SGO-7 with an EZ Gas running full bore- 275k. Just don't wanna get pinched😁

Steamhead · October 10

Are the mains well vented and insulated?

Jamie Hall · October 10

Make sure the mains are well insulated and that is in range of should work well.

Jamie Hall · October 10

Oh. And near boiler piping! Meticulous!

The Steam Whisperer · October 10

What they said above for 1 pipe steam! For 2 pipe steam, you usually can orifice down the radiator capacity to about 60% of the existing EDR and then add about a 15% factor. You'll need to check heat loss if you go to orifices to make sure you have enough radiator capacity once downsized.

EBEBRATT-Ed · October 10

7 section is good for 758 sq feet rads are 772. Your within 3280 over on btus. It will be fine.

I wouldn't give it a second thought.

GW · October 11

https://forum.heatinghelp.com/discussion/comment/1867444#Comment_1867444

the venting is super lame, several of theee

GW · October 11

Cool - it’s a one pipe

GW · October 11

Ed Does the 275k input make you squirm at all?

EBEBRATT-Ed · October 11

@GW

I don't understand the question.

If you rads are 772 sq feet and the boiler will do 758 those ratings are without the PU factor. The actual load is 772 x 240=185280 + piping and PU.

The boiler can fire 280,000 input gross output is 240,000 after chimney and jacket loss. the difference between 240,000 and the radiation load of 185280 is 54720 which is what is left for piping and pick up.

240,000/185280 so your left with a PU factor of 1.295 instead of the normal 1.33

GW · October 11

@EBEBRATT-Ed sorry Ed I am throwing different factors.

The bigger carlins are not available off the shelf.

The Carlin EZ will run at 275k max, am I slicing hairs and running thin?

Can I still expect the .85 with a gas gun? Will the EZ gas truly pump out 275?

275 x .85 is 233

233,000/ 185,280 = 1.25

let it rip?

GW · October 11

https://forum.heatinghelp.com/discussion/comment/1867447#Comment_1867447

Jamie the current boiler seems to be a big ole 1970s Weil McClain, no header, no equalizer, no H Loop. I gonna try hard to make it better😊

EBEBRATT-Ed · October 11

@GW, Got it.

I think you will still be ok. I always question why the pick up needs to be so much. 33% is a lot. I can see needing more PU in the spring and fall when the boiler cycles a lot and sits off for a long time.

When its really cold the boiler sits idle for a shorter time and the piping stays warmer and would need less PU in my opinion.

The difference between 1.33 and 1.25 isn't much.

Rather than taking the suppliers word for it it might be worth a call to Carlin to see if they can scare up a 201. Sometimes the distributors don't try hard enough

GW · October 11

Thanks Ed

I have a few EZ burners in my bone yard too, I could mount one if the 201 takes a couple weeks

Or I can run an oil gun too, there are good tanks in the basement.

EBEBRATT-Ed · October 11

@GW that would work I am sure they can get you the larger burner before it gets really cold.

Pick Up Factor- AGAIN

Comments

Categories