Hold My Beer Bro , I Got This

hvacfreak2

Saturday I go down to the basement to tune the burner. I figure I'll take some readings , adjust some air and draft , 2 hours tops messing around. I'm watching this thing ( Megasteam 396 new install ) and it's almost " sputtering " . The AFG sounds like a Riello that is sucking air every few seconds. So I pull the drawer and check stuff 1 more time , carefully place it back in , check retention head setting again. Start burner again , check breech draft 0.00 - 0.01 in. wc. , over fire .03 , stack is 300 - 320 sometimes , fuel is 180 psi. I look down at the burner and there is fuel coming from the bottom. I shut it down and lift the transformer , oil in the fan housing and not much in the gun.

I worked on burners back in the late 1980's when I had to. I could change a nozzle and a filter and be someones hero for the day but that was about it. Everything I worked on was 100 psi fuel pressure no more , no less ( Sunstrand A2VA-7116 ). I was amazed when I saw a Riello that ran at 140. So now I have a machine that works at 180 , I used a refrigeration gauge to set the pressure , my oil gauge stops at 150. The new pump is a 6527.

I looked over at the old burner from the V-75 boiler and it had a 7116 pump. I never noticed that it would go to 200 , like the one that is on the new burner . It would have been an easy swap except for the box mount on the new boiler left zero room for the solenoid. I called the only guy I know that would know what the heck I was talking about and he reminded me that the new primary sequence is different than what I worked on and that I had to use that valve. Bless you @Steamhead Frank for answering the phone , I was about to make a mess of things for sure. Anyway I was able to make it work by installing it upside down . I got real lucky with the nozzle line connection. Also I wanted to change the nozzle but did not have the right one. I changed the nozzle filter from another new nozzle , it seemed to help.



Today I removed the 2nd pass baffles and now have a solid 400 degree stack. I fired it up early and was glad to see that it was doing better ( in the end I think my problem may have been a loose door bolt ). I did a few slow skims and a complete dump or 2. While this was happening I remembered some No. 2's I bought from Ron Edwards in 2006 that I came across last week. I got drunk and put them in a box and forgot about them , but today was a great time to put them to good use. I did one last fire and man what a difference.







I have some more cleaning to do and being able to sweep all of the low pipe with fresh water helps.





But really I just went down to turn a few screws , lol good grief it took my whole weekend.

Steamhead

Glad it worked out. ISTR changing the primary on the old burner to an R7184B, which took full advantage of the solenoid valve by adding a delay to it. In that configuration it works the same as the MegaSteam burner, unless they've added motor-off delay to the mix.

hvacfreak2

It's the same , there is a post purge on the new burner though.

STEVEusaPA

Well you got it working...What's your draft, now that you pulled some baffles? I think they like it at 0 on the inspection hole in the back. You may have only increased your stack temp because you increased your draft. What size nozzle?
Any final combustion numbers?
Does the burner box fit back on.

KC_Jones

Shouldn't the title of this been hold my White Russian?

hvacfreak2

STEVEusaPA said:

Well you got it working...What's your draft, now that you pulled some baffles? I think they like it at 0 on the inspection hole in the back. You may have only increased your stack temp because you increased your draft. What size nozzle?
Any final combustion numbers?
Does the burner box fit back on.

You know to be honest I did check the over fire but not the canopy , the over fire did not change much still around .04. The nozzle is .75 60 B Delvan. I was just using my old analog Lynn to get close on the basics I did not get to the generously lent / borrowed digitals. I did not disturb the box , I flipped the fuel unit upside down to avoid that.

KC_Jones said:

Shouldn't the title of this been hold my White Russian?

Edit , the avatar. lol , man that took me awhile. I just thought that this would go relatively simple and , it reminded me a movie that someone said that before he got his *** stomped in a bar fight scene , lol. I havent't drank in two years so my humor may be out of touch .

Anyway , I have nozzles , pump is on order and I may go back into it today.

@STEVEusaPA - you were right , back down to 375 we go , lol. Draft was .03 in the canopy. It is going to take me awhile to get a handle on this . Half a turn on anything makes a big change in something.