Rick; you mention the MET probe shows lower temps for the hot/fast roasts. Does the MET probe show the same general temps during a roast with both normal and the hot/fast roasts? Or is it lower than the normal roast and roughly by how much?

Also, if I read correctly you mention you use the magnahelic to measure gas pressure? If so, where is it mounted in your system? And do you also have a gauge after the needle valve?

Asking these questions because I've experienced pressure regulators that have gotten wonky, and I've also blown gas gauges too. In lieu of the stove being flaky I'm wondering if it's something in your gas supply chain.

chuckcoffee wrote:Nice, I like that setup with the Magnehelic

Really only way to tell is to check the potential blockage points with a flashlight on future roasts. Any feature on the inside of the tube can be a starting point for blockages. I sometimes get minor ones where my 1/8" copper tube comes through for the phidget.

Just asking but do you remove chaff after each roast?

Btw getting a cyclone setup if you are doing multiple roasts in a session is a great improvement and one less thing to worry about.

Could you send some details on the Magnehelic model and where to purchase. What was involved in setting this up?

I'm pretty sure it's this model https://www.dwyer-inst.com/Product/Pres ... Series2000. PM me and I can tell you all about the set up. I highly recomend it. It's been super useful.

Brewzologist wrote:Also, if I read correctly you mention you use the magnahelic to measure gas pressure? If so, where is it mounted in your system? And do you also have a gauge after the needle valve?

Asking these questions because I've experienced pressure regulators that have gotten wonky, and I've also blown gas gauges too. In lieu of the stove being flaky I'm wondering if it's something in your gas supply chain.

Steve. No the Magnehlic is for exhaust pressure, not gas.
Gas pressure is one of my thoughts. I'm going off the stock Huky gauge for all my gas settings.

The MET on the profile I posted in my first post actually shows lower temps. This would suggest to me that my fan is high. The high fan could accelerate things, especially the beginning part of the roast when gas is high.

Maybe the best thing to do here is a full breakdown and clean out and see if I can trouble shoot next time the Huky gets angry!

I know I'm late here but had a wonky issue with my Huky before.

My stove developed a gas leak in the brass valve housing. Very weird and totally random. I replaced it and started getting consistent roasts again.

At least until I was tardy in cleaning the exhaust side and things got wonky again.

Do you recall what "wonky" looked like? High or low temps?

Was the leak identifiable by soapy water?

Rickpatbrown wrote: The MET on the profile I posted in my first post actually shows lower temps. This would suggest to me that my fan is high. The high fan could accelerate things, especially the beginning part of the roast when gas is high.

IMO, due to the location of the MET probe in the Huky, it is less affected by airflow than gas (at least on the solid drum model). So looking at that profile, I'd guess your MET is lower simply because you had to lower the gas to offset the BT/ET rising more than expected.

The rising BT/ET could be due to a hotter ambient roasting environment too, but I'm guessing you've ruled that out?

As for a change in airflow causing the rise in BT/ET, I've found this occurs when increasing airflow due to increased convection, BUT at a certain point increasing airflow further starts to cause cooling. So in theory, the rise in BT/ET you are experiencing could be caused by increased convective activity from increased airflow OR because there was too much airflow to begin with, and an obstruction caused the airflow to drop a bit thus increasing temps. But given your use of a magnehelic you'd have seen this airflow change?

Just some additional random musings on this issue...

Rickpatbrown wrote:Do you recall what "wonky" looked like? High or low temps?

Was the leak identifiable by soapy water?

Sorry for the delay. Work et al taking me away from my hobbies.

The leak was on the actual valve body-I could see flames from places they shouldn't be.