Gas Orifice is 17/64".....off the charts I see...anyone know?

JUGHNE

Old NG steamer with 9 X 17/64" drill bit sized orifices. Looks to be .2656, a #1 is .2280.
Does anyone have a chart that goes larger than the #1? At the various WC ratings.
Thanks.

EBEBRATT-Ed

Used to have a chart somewhere................Went on Carlins website ez gas burners. They don't have 17/64 but a 9/32 (slightly bigger) is 150,000 and a 1/4" (slightly smaller) is 125,000 so I would think your about 137,500 x9 or 1,237,500 if that makes any sense. that's at 3.5 wc

Maybe can find something on a burner mfg web site

JUGHNE

This is a 1974 American Standard steamer 1B-J1.
Nameplate is almost gone. Only the stamped numbers are visible....the printed part isn't quite there.....??G-1010
Looks like 1,800,000 input/1,440,000 output. Mini input?? 360,000 ?? Could that be right?
4563 steam Sq Ft. then ?????1252.2

There is more fire there than needed I am sure. TRV's on most CI rads. Hanging heaters not used etc.
I just like to check out the numbers etc.
Thanks Ed

EBEBRATT-Ed

1,800,000 input x.8 (80% efficiency)=1,440,000 output. That makes sense

4563 square feet off steam x 240 (btu/sq ft)=1,095,120 btus x 1.33 piping and pick up=1,456,509

almost makes sense

Pretty close to the 1,440,000 above

Looks like they used a pick up factor of1.31492439 LOL!!

JUGHNE

Thanks Ed, I bet that took a lot of scratch paper....who else knows what that is?
The school is supposed to come up with the original print of the heating system. (1930's) It has upfeed risers, looking for any original air vent locations. Also connected EDR without doing all the leg work of 3 floors.

Canucker

JUGHNE said:

Thanks Ed, I bet that took a lot of scratch paper....who else knows what that is?
The school is supposed to come up with the original print of the heating system. (1930's) It has upfeed risers, looking for any original air vent locations. Also connected EDR without doing all the leg work of 3 floors.

So you'll be doing the leg work of collecting the EDR soon?

JUGHNE

Maint man said they were getting a copy for me.
Even with it I will still have to visit every room.

Still wondering about the item on the nameplate......
"Min? Input? 360,000" ??

EBEBRATT-Ed

Could it be minimum input 1,360,000?? That would make sense

JUGHNE

There is not a 1 in front of the 360,000. The hammered numbers are very distinct. It does look to say min. in??? above the hammered numbers. Doesn't make sense.
Thanks.