W/M Ultra testing

RELY

I have 3 ultra's up and running 1-155 and 2-105.Standard startup requires you test co2 and o2 my numbers are no not in tolerences as per w/m startup manual on 1 of the 105's.I was back to the 155 to run co2 and o2 tests and found a leak on upper left corner of block. Has anyone been testing at startup of these boilers and what was your readings. I will post mine as soon as I get home thanks

Floyd_5

Okay, just came up from the basement.....

here's what I got.....
the readings were all over the place when it fired up from cold.....
I have a 155...
as it ran up to high fire the co2 was around 8.1 - o2- 6.6
I restarted it hot and check the low fire....
8.4 - 6.1

as it ramped up again and settled out at about 40-50% fire
(10* differential) the readings settled at 8.9 & 5.3

co readings were between 12 and 20ppm


All of those readings are within the specs.

Did you wait for the boiler to warmup????

If you have any questions get with Matt Downs from WM, eml him @ mdowns@weil-mclain.com

Ask him also about the leak... he will be more than happy to help you with anything! Tell him Floyd sent you to him.

Kal Row

what model tester are you using?

LEAD PIPE

checked mine today

High fire

CO (Start) 215ppm (Run) 30ppm (End) 30ppm

CO2 8.5

O2 6.0


Low fire

CO (Start) 170ppm (Run) 24 (End) 24ppm

CO2 6.7

O2 9.0


At 180 degrees output temp. Flue temp was 148. Return temp was 158.

Every thing was within the ranges exsept the o2 on the low fire.

Floyd_5

Looks to me....

like you got the CO2 and O2 readings switched around on the low fire.

LEAD PIPE

I will

re-check, I did test it after working the midnight shift so you may be right.

Thanks once again

Kal Row

thats a lot of air left over after combustion

yeah it guarantees minimal co, but it's cooling down combustion way to much - something’s not right here, the co2 numbers are too low also for a high eff unit – you said that they modulated the fan speed also – so you should not have that much free air left at the end – unless there is a built-in blow through to cool the pvc outlet side – I didn’t notice it in weil's diagrams

LEAD PIPE

Re-test

gave the same result, high O2 on the low fire. It says to call W/M if there is a problem. There are no instructions on increasing the gas pressure it says to call.

Nron_9

ultra

thanks guys for posting your findings we just had the rep into see us today to see if he could intrest us in the ultra boilers nice to see some feed back as there just being introduced into the canadian market as somthing better than the trinity NTI and cheeper tha the vidodens

Floyd_5

Got two more about ready

to fire up... I'll check them out and see what I get.
Hopefully yet this week, but next week for sure.

Floyd

Kal Row

do any of your testers have an hc port

i would love to know the actual left over unburnt hc's in the flue - that will tell me if they truly have this modulating thing down pat - what i get from the low CO during “run” phase – is, that what actually burning , is burning very well, but all that o2, is telling me, that there are a lot of cold spots in the combustion chamber, where nothing is getting burnt, OR (the big OR), they are running too much air through, because they don’t have active combustion control - so they are loosing heat right there – I mention this in another thread – that a catalytic converter in the flue would work well for theses things since we could put a water jacket around it and extract the heat from it’s slow burning of the left over hc’s – unlike cars where we just lose it