HELP please on my Lochinvar WHN085

Harvey Ramer

You were pumping through a conventional boiler that had almost no pressure drop. Now your boiler and near boiler piping has considerably more pressure drop.

That, of course is with an assumption of normalcy. I didn't see any pictures of the previous install.

maybemark

Harvey
things you said is true
I have pictures of the old boiler piping, but i don't know if it's something that needs to be seen, unless you want me too.
somewhat similar to mine, but 1 1/4" and all iron pipe, you see mine is all copper, and 1"

maybemark

Harvey, it would be great, if that's all it is in changing a pump

Harvey Ramer

Well, from over here it looks like you will be doing extensive manual rad balancing or you'll put in the bigger pump.

SWEI

Most of us have pumps on hand that we would try in a situation like this.

Hatterasguy said:

15-58: 16 GPM at 2
007: 14.5 GPM at 2

I seem to have different curves than you do. Here's what I get:

15-58 007 Series 100
2' 15.3 20.4 29
4' 13.7 17 25
6' 12.2 13 18

The unknown here is the new system curve.

Gordy

I was going to say those curves are the ones I'm familiar with.

Steve Minnich

Good theatre if nothing else. Good thing it's not cold out.

maybemark

just got off the phone with Fred, i asked him if he has a pump laying around, the answer was no

Gordy

The NRF33 will give you 27GPM with 3.5' of head. Your head is probably doulble that. This equates to an EDR of 1151 sf. IIRC that is close to your EDR Mark. Correcta?

maybemark

Gordy
Help me out to understand what your asking me.
Also, why is the upstairs got good heat, and just the back of the house is colder, and the radiator in the entryway is just warm, and that radiator is close to the living room radiator that is very hot

maybemark

the living room radiator is closest to the boiler, next i

Harvey Ramer

deleted

Gordy

Yeah I agree I edited my post in that Marks head will be more.. I think its the perfect selection

maybemark

is the direction of my pum proper, I'm not talking about flow, this is correct. I mean how I installed it

maybemark

if you don't mind me asking, what is bull headed tees mean?

maybemark

what I don't understand, the 2nd floor is good heat, even the back of the 2nd floor which is above where i am having some of my problems

SWEI

Technically, a bullhead tee is a fitting where the branch is a larger diameter than the run.

In this case, it means the flow of water is into the branch of the tee.

maybemark

what i did, to bring the 2 sides together?
is this a no no? I repeated what the other pluber did 35 years ago, on the return, the supply, he did not use a tee

Harvey Ramer

When your flow enters the side port of a tee and exits both end ports or vice versa, you are bull heading it and you get a large pressure drop as the result.

maybemark

the pressure on my tee is coming from both sides, then going to the near boiler pipping

maybemark

should I change this

maybemark

I put the heat on maybe 2 hours ago, to 75
again the living room is hot, so is the dining room, my bedroom is close, my bathroom is less, and my kitchen back radiator is cold, no heat at all, and the front entryway is a little warm

Harvey Ramer

It wouldn't hurt.

maybemark

I have a fairly large kitchen/ office in the rear of the house I have 3 radiators in there, 1 is warm, the other 2 are cold, so is the small bathroom, cold

maybemark

both return and supply, should i change
and how would i do it, bring all 4 pipes to the wall of my boiler?

Harvey Ramer

That drawing I posted earlier shows you how. It's a PDF

maybemark

why are the rooms on the 2nd floor not having any problems?
I just went upstairs, 3 radiators are hot, 2 are very warm

maybemark

Harvey, i ended up being able to open it, thanks

maybemark

help me understand how the 2nd floor, which is farthest from the boiler is hot, but directly below it in my kitchen is cold
a bigger pump will fix that?

Harvey Ramer

The cooler return water is at a higher elevation then from the first floor. The weight of this water in the returns is drawing the lighter hot water up to the second floor.

maybemark

a thought came to my mind, mayb e i am way off, but, i want to put it out there
20 years ago, I remodeled my kitchen/office, fred put in 4 radiators 3 in the kitchen, and one in the small bath, he used 3/4" copper for the piping to the radiators, could this cause a problem?

Harvey Ramer

It will certainly contribute to the imbalance unless you have manually balanced them over the years.

If the house was heating satisfactorily before you changed the boiler, you can make it heat satisfactorily again.

maybemark

actually, the kitchen was too warm, I had to throdel down the radiators in the back

maybemark

but why the 2nd floor no problem now, and underneath, big problem, and entry way, big problem?

maybemark

should i redesign the piping that my old supply and return do not go into a tee, before it gets to the near by radiator piping
and get rid of the bull head tees

maybemark

I meant to say, the bull head tee going to the near by boiler pipping

maybemark

Hat
I'm sorry, but I don't understand the numbers you put on the post, can someone help me with that?

SWEI

I'm going to guess that the question above may have been directed at me? The forum SW nicely shortens any repeated spaces into one space, thus mis-aligning the table I made.

First row lists three pumps.
Next three rows start with feet of head and then show GPM for each of the three pumps.

maybemark

ok
is hat saying anything about what he might think would solve my
issue?

Gordy

Harvey did.