Astria Montecito CAT troubleshooting

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Niblet

New Member
Sep 1, 2021
4
USA
Hello, I’m new to the high efficiency wood insert scene, just starting with my new Montecito. Having trouble getting the temp gauge into the catalyst operation range. Per the manual I’m supposed to only need to have the catalyst bypass open when starting from cold or during reloading. The manual warns not to operate the unit with the bypass open otherwise. However I can’t seem to get the catalyst bypass gauge into operation range despite having an extremely hot fire. It came up only once but then dropped during reloading and never came up again. The catalyst has even been red hot at times. Starting to worry that there’s something wrong with the temperature gauge and that I’ve over-fired the unit. Anyone have any experience or insights that may be helpful? The company is only available for help via phone mon-fri.
 

begreen

Mooderator
Staff member
Nov 18, 2005
98,081
South Puget Sound, WA
A defective thermometer is possible. If the cat is glowing red and stays glowing after the bypass is closed, then it is active. You can verify it is working also by checking the chimney outside. If no smoke, the cat is working.

How large is the fire? How many splits are being burned at one time? How well seasoned is the wood? Do you have an IR thermometer for measuring the temperature on the top of the fireplace door?
 
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Niblet

New Member
Sep 1, 2021
4
USA
A defective thermometer is possible. If the cat is glowing red and stays glowing after the bypass is closed, then it is active. You can verify it is working also by checking the chimney outside. If no smoke, the cat is working.

How large is the fire? How many splits are being burned at one time? How well seasoned is the wood? Do you have an IR thermometer for measuring the temperature on the top of the fireplace door?
I only briefly closed the bypass bc the gauge hasn’t been indicating that the cat would be active. The fire got quite large as I was attempting to get back up to temp. I had about 5-6 splits in there at one point. The wood was from a dead tree, hasn’t been cut a year yet but moisture meter ranges b/r 14-20%. No IR thermometer, maybe I should pick one up tho.
 

stoveliker

Minister of Fire
Nov 17, 2019
6,483
Long Island NY
How did you measure the moisture? On a room temperature split that you resplit to measure on the freshly exposed surface?

Because the cat not getting hit could be (a broken thermometer or) wet wood.
 

begreen

Mooderator
Staff member
Nov 18, 2005
98,081
South Puget Sound, WA
5-6 splits is not a lot of wood in that big firebox unless the are big logs. It's hard for us to know whether things are working right or not without some visual verification or temp readings. But again, if the cat stays glowing and there is no smoke after the bypass damper is closed, then it could be ok. What happens to the fire when the bypass is closed? Does it remain actively flaming or die out? If still actively flaming, what happens if the air supply is reduced via the air control?
 

Niblet

New Member
Sep 1, 2021
4
USA
Thank you all for taking the time to reply. I have basically started ignoring the temperature gauge and have been engaging the cat whenever the fire gets established. Included are the pics of my current burn. As you can see the fire is going strong with a red hot cat but the temp gauge still is not in the green.

C7B7E7AD-E268-4F42-92F7-7D4625FDD7EE.jpeg E112B3A9-F6A6-4CEE-AE4A-A4ABE047407B.jpeg
 

stoveliker

Minister of Fire
Nov 17, 2019
6,483
Long Island NY
I think your gauge is faulty. I'd contact the dealer or mfg for a replacement.
 

stoveliker

Minister of Fire
Nov 17, 2019
6,483
Long Island NY
But while it looks ok, please do look at the chimney 10 mins after (preferably) the stove air has been turned down (so not a lot of flames) and the cat glows.
 

begreen

Mooderator
Staff member
Nov 18, 2005
98,081
South Puget Sound, WA
The fire and cat look good. Yes, call the dealer. The gauge may be ok if the probe fell out of place. Regardless, it needs to be fixed.