Buderus G115-21 question

Big Ed_3

The NPT thread is straight not tapered ,The supply tap is also a NPT thread.. NPT would not split the block like you can with a tapered thread.. You noticed the special marked conversion nipple ?

Unknown

We started a 2 day project

using rhe Buderus boiler and indirect combo . So far it's going quite well . Except for one little thing -

The 3/4 inch port for the boiler drain . There is some kind of insert installed that changes the threads to 3/4 NPT ( I'm guessing ) . But they ain't tapered . The boiler drain that came with the boiler threaded all the way in without stopping . We tried another 3/4 drain , same deal .

Is there something we're doing wrong ?

Thanks for any help in advance , Ron .

Ray Landry

Hey Ron hows it going man? You guys are putting in a buderus not a burnham??? You must be psyched to get a little change for once! The 3/4 boiler drain tap is inherent to that product line. I usually solve it with a 3/4x space nip, coupling and drain that way you don't end up with an upside down drain. Go like 8 times with tephlon and even though it still may feel loose, it won't leak. Good luck! Are you using the logomatic?

Mark Hunt

Nothing wrong


they all bottom out.

Freaks me out EVERY time Ron, but they don't leak.

Have fun with it!!

Mark H

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Unknown

OK

I'll go for it . I dunno about this hand tight stuff , but if you say it'll hold , then it'll hold ( I'm still crossing my fingers .

I noticed the return port is right next to the boiler drain . Any reason why the boiler can't be drained from the return port ? I put a drain on there too .

Thanks alot Mark .

Unknown

Hey Ray

Things are going bonkers down here . EVERYONE waited till the first chill in the air to upgrade their equipment . I think I've been saying that for the past 20 years though . And I'm one of em' .

The customer went with Buderus for a few reasons , the main one being a 5 inch liner in the chimney ( the MPO is 6 inch ) . Another was the Logamatic R2107 . I've read the literature for the Tier 3 bundled for Burnham and it's an amazing control , but way too much control for these small residential systems . This home is just 2 zones with an indirect .

Good idea with the nip and coupling , I think I'll try that . I'll wrap the crap out of the nipple too . Any reason why they make that adapter so loose for the drain ?

Thanks Ray . How you been doing ?

David Sutton_6

I feel your pain......

Man it still drives me nuts, What ever you do dont use a close nip in there it will go right thru...

like Ray said wrap it...alot.....like the hole roll baby.and it wont leak , its like a boiler mystery..

welcome to the blue club...


David

Ted_9

buderus

We install 90% buderus and never had one leak. but i did crack the nipple that comes with the G234 drain. Just dont over tighten it.

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kevin coppinger_4

ron

the return port acts to disperse the cooler water when it comes back...it has a flow diverter thingy there...I suppose they don't want to create a problem...I used a nipple in mine...but of course it leaked in mine ...not a job I did...kpc

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Ray Landry

I think I heard once that they are not tapered threads, they are flat... A few years ago the tank fittings on the buderus used to be flat too. They used to give you loctite lampwick to wick the threads otherwise you where guaranteed a leak! We've been busy as heck too just got home from a boiler job an hour and fourty five from my house, nice little GB/30 with a storage tank. Fun stuff!

Unknown

Yep , we used

the supply nip . I wonder why they wouldn't use the same type nip for the return and the drain ? What are those conversion gaskets made of ?

Unknown

Been in the club

since 1996 . Did a piggyback boiler / indirect . Back when all the instructions were in German . Gotta say their customer support was excellent even back then .

Unknown

It always happens

to your own stuff , huh ? When I installed a Peerless in my home the coil leaked internally , of course .

Big Ed_3

I am still trying to figure out .....

....... what the large flat nuts are used for on the Buderus hand truck ????


The truck by the way is a must when you install the G115's . Takes it right off the skid and bounces the boiler down the stairs . The tubed tires work well rolling over a lawn too. The handle has a nice feel and give a lot of control.
The wing nuts on the truck bolts the truck right to the back of the boiler . But G215 I am sorry to say will not and uses the supplied skinny strap... Which I am leery trusting since I prefer the bottom.

David Sutton_6

Cool

Charter member ;-)