Beckett NX

Glen

which I Inherited from another contractor. And after reading the posts - I would think we are all now either gray/white (hair) or bald. At the end of the day - we replaced the pump (aside from all the other stuff too) - the solenoid would abruptly shut down. No warning or other cause visible or measurable. My vote is still with Riello. Its the only burner used in the arctic - for very good reason. That said - I am still a big fan of the Viessmann chassis burner and the Hansa.

Singh_6

so far

of the two NX burners I encountered, I have numerous problems.
One I installed about 20 months ago, on a Buderus G115 Direct Vent. Back then checked setting with analyzer, running great, a few months later lockout. I can go thru a list of things that were checked , replaced. But , myself included about four different techs worked with this thing.(Two visits were from oil co.) Home owner must have called me about 10 times in the course of 20 months for no heat/dhw.
I did speak with tech service at Beckett, a couple of times. They were great. Last month they sent me a new nozzle assembly with a piece of glass in the retention cup to reflect more light to the cad. to lower very high resistance readings. Also new 7224P control. I was told there a revision on the older dated control. Always about 11.5% CO2, no smoke.
Sadly , today I replaced the burner with a Riello BF3, on my dime, even though past my one year warranty . The longest run a got is 10 months, each time someone else touched it , less than a month.
Last month I inherited a new install, now this job has many problems, but one of them is a Beckett NX on a weil mcclain ultra oil DV. Same nuisance lockouts, same four flashes cad reading.
Is it just me? If someone else has some good tips , please let me know , other than buying a few cans of white spray paint. : )

bill nye_3

Well

Well, I had a Viessmann. I was back four times, my ex-partner 6 times, and once when he was on vacation another company.

We finished the install late at night so I didn't check stuff real good. I must not have tightened the lock nut on the adjuster? Once I must not have tightened the screw that held the cad cell holder. Once I changed the primary control. Once a handi-man turned the breaker off and I had to go there at 10:30 PM. Once I think they let the tank run out.

But once there is a problem the customer is quick to point a finger and it always your fault. Especially if it was an expensive install.

Robert O'Brien

Get

a QuickLook72 from Onwatch and you will know the exact ohm reading instead of counting flashes.1650ohms gives you the same 4 flashes as 6000. It's nice to know exactly where you are instead of just a range. FWIW Direct vents in general are problematic,I've had problems with direct vent boilers with Riello's also.

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kevin coppinger_4

Robert point...

about direct vents is true...they can be tricky.....I have done many 115's w/ carlins and have some issues(mostly when it was very cold) I did have one issues w/ a Thermodymaics LMDV and a Beckett AF2....arrrh! After a couple of years I through in the towel,on my own dime too and installed the BF5...problems disappeared. Three pass boilers and Direct venting are not a great match.I stick to chimneys...kpc

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Weezbo

it is not just you Guru Singh...

i too have had the acquaintance a couple years ago with the NX....If the owner runs out of fuel on a cold day....it is the worst set of events you can imagine getting it back on the right angle of the dangle...

i took the primary off and ran it for two hours keeping an eye on temps....the fire eye(cadd cell) is just too finikey thats my belife...i wanted a Riello in the first place...ended up completely at witts end with it...took it out and replaced the burner....ran another combustion test no problem....must have new rentors who pay the fuel bills on time....

Ragu_5

Singh, it's not you....

There were and still are problems with the NX. I had oneon a small Viessmann and it kept locking out; tested and tried everything. Found that there was a redesigned burner which got shipped to me. Set it up and it would lose its flame in about 20 seconds. Called tech services and had to change controls and cad cell on this brand new burner; still wouldn't run. Called again and wired it for constant ignition. Now it runs.

That cad cell situation is a real pain. Here's a funny thing: I originally brought outside air to this burner. With the outside air disconnected, I got an ohm reading of around 600. With the outside air hooked up, the ohms shot up to about 1,200.

I'm staying away from them in the future.

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Noel

Cold fresh air.

When I was doing service, a customer had made up an "air warmer" for an oil burner with an air boot on it that used outdoor air for combustion.

He took a piece of ductwork, 8x30, and put two endcaps on it. Before he assembled it, he screwed it to the side of the boiler, a couple inches above the floor.

He cut two 4" starter collars into it on one side; one near the top and one near the bottom. The top one was connected to the burner, and the bottom one was connected to the fresh air intake.

Every time the burner started, it had a box full of warm air to start combustion with.

Noel

Noel

Cold fresh air.

When I was doing service, a customer had made up an "air warmer" for an oil burner with an air boot on it that used outdoor air for combustion.

He took a piece of ductwork, 8x30, and put two endcaps on it. Before he assembled it, he screwed it tightly to the side of the boiler, a couple inches above the floor.

He cut two 4" starter collars into it on one side; one near the top and one near the bottom. The top one was connected to the burner, and the bottom one was connected to the fresh air intake.

Every time the burner started, it had a box full of warm air to start combustion with.

Noel

Cosmo_3

oil and direct vent

Not happy dancing partners at all in my book.

It doesn't matter whose brand of burner, 10 out of 10 oil techs should agree that direct vent and oil burners are more prone for nuisance calls than ditching the whole direct vent route, and using a combustion air intake fan instead when combustion air is required.

I have had the best luck with the BF-5 but can't say I never had a nuisance call on that either.

Cosmo

rjm

cross contamination

I was talking to a rep from carlin recentl and he told me that cross contamination of exhaust/intake air is a problem with direct vent boilers. Sounds like that is the problem with high ohms readings from the cadcell. Does the prevailing winds blow against the venting?

Big Bob_2

Cross Contamination

Thats what I hear, when the ohms start to hit around 3000 you know the flame is starting to turn blue, the cadcell cant read blue

Singh_6

One of the usual suspects.

Feilds Termination KIt FT-4. Not much you can do about x-contamination.

Devan