Outdoor Wood Furnace Info

Outdoor Furnaces - Manufacturers WITH EPA-Certified Models => Central Boiler => Topic started by: plumb bob on November 01, 2013, 09:52:25 AM

Title: Pump noise and furnace bubbling
Post by: plumb bob on November 01, 2013, 09:52:25 AM
I have a CB5036 that is starting its third winter  :thumbup: right now I am burning oak and maple. My question is, the bed of coals is so hot that the furnace is bubbling but the water temp says 175-185. Now i'm wondering if the bubbling is causing air which is making my grunfoss pump at the furnace squeal. I turned the pump off and then back on and the noise stopped. Do you think the pump may be on its way out? Thoughts?
Title: Re: Pump noise and furnace bubbling
Post by: slimjim on November 01, 2013, 11:23:58 AM
Are you full of water
Title: Re: Pump noise and furnace bubbling
Post by: plumb bob on November 01, 2013, 04:22:47 PM
Yes, according to the water guage it's full
Title: Re: Pump noise and furnace bubbling
Post by: slimjim on November 01, 2013, 04:53:05 PM
I don't like the bubbling, can you check the actual water temp on the top of the boiler, is your temp guage accurate, OK central guys can you help here
Title: Re: Pump noise and furnace bubbling
Post by: plumb bob on November 02, 2013, 07:24:08 AM
I assume the electronic therm is accurate, but I will try to test the actual temp when it stops raining.Do you think the air/bubbling could cause the pump squeal? I haven't added any wood in the last 13 hours and the temp is still ok (185) and the bed of coals is about 8-10" thick. No bubbling.
Title: Re: Pump noise and furnace bubbling
Post by: slimjim on November 02, 2013, 08:48:16 AM
Yes it could make the pump go bad but more importantly it can prematurely hurt your stove if it consistantly boils in one spot inthe unit
Title: Re: Pump noise and furnace bubbling
Post by: sabercat on November 03, 2013, 06:32:32 AM
Mine does that also, I'm going to check the temp with a thermometer, mine sounds like air bubbles rising to the top. I'm full of water too.
Title: Re: Pump noise and furnace bubbling
Post by: plumb bob on November 03, 2013, 08:33:33 AM
Mine does that also, I'm going to check the temp with a thermometer, mine sounds like air bubbles rising to the top. I'm full of water too.
.EXACTLY. This morning I did take out about 15 gallons of coals to lower the bed and only added 4 pieces of wood to the remaining coals. Im hoping that lowering the heat source will help. This is my first time burning good wood and I think I will have to adjust the amount of wood I add. 4 pieces of oak/maple is lasting 12-14 hours as opposed to poplar,pine, birch that I had been burning last year.We shall see.

P.s.  no squealing as of late  :thumbup: