cold air return?

cold air return?

PostBy: casino_boy On: Sun Dec 05, 2010 12:51 pm

I have a hitzer 82 furnace and have read the threads on which duct to plug into but unclear.
My propane furnace has a a/c hocked to the hot air side allready so thinking this is not going to work out well.
So should i connect to the cold air return dust?
My hitzer is about 10 feet away from the central located propane furnace and out away from the basment wall.
There is a 12 inch duct on top of the furnace for hot air supply but nothing for return.
I supose i could hook to the cold air return with a back draft damper just above the stove and leave the basment door open for a return.
But wont the hot air just come out of the cold air returns from the house?
I have a 900cfm blower on the stove not connected yet but shiped with the unit.
What might works best for me.
casino_boy
 
Hand Fed Coal Furnace: Htzer 82 FA
Coal Size/Type: sub-bit pea, kentky 2 x 6 bit

Re: cold air return?

PostBy: CoaLen On: Sun Dec 05, 2010 2:02 pm

Take a look at the Hitzer installation manual:
http://www.hitzer.com/documents/product ... 0Final.doc

Here's what Hitzer says NOT to do:
Do not have supply hot air flow downward as this will not allow the Hitzer Furnace to operate properly without electricity

Do not have the supply air flow back into the blower of existing oil or gas furnace. This will damage the existing furnace controls and/or void any warranty.

Do not have hot air from gas or oil furnace flow downward into the Hitzer Furnace and flow out the Hitzer Furnace to existing duct work.

I had my Koker installed by the dealer. Big mistake. He connected the hot air output into the cold air duct on my propane furnace. When the furnace blower wasn't on, all my heat drifted into the cold air duct. My "heat" ducts were cold when the blower came on, blowing cold air until they warmed up again. I reinstalled the Koker, running the heat duct into the top of the furnace plenum and installed baffles to close off the propane furnace from the Koker. MUCH better installation. Now all my idle heat drifts up the heat vents as it should.
You're asking good questions. You'll do a good installation I'm sure.
Good luck,
-Len
CoaLen
 
Hot Air Coal Stoker Furnace: Keystoker Koker
Coal Size/Type: rice

Re: cold air return?

PostBy: international86 On: Sun Dec 05, 2010 3:30 pm

I recently installed a Keystoker A-80 warm air furnace. What I did was connect the hot air plenum to the main hot air duct leading from my oil furnace, so that I could use all of the existing heat runs for either the coal or oil furnace. I then ran separate cold air returns from two locations in the house. I added a damper that I can slide into place in the hot air plenum of the coal furnace so that when I use the oil furnace, I can keep the heat from the oil furnace from running into the cold air ducts from the coal furnace. It works very well for me!
international86
 
Hot Air Coal Stoker Furnace: Keystoker A-80

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Re: cold air return?

PostBy: TAMNOZ On: Wed Dec 08, 2010 3:08 pm

I tapped my Kestoker to the supply side as I didn't want the heat to have to go down and then back up. But I keep my fan for my Heat pump running on med. speed all the time (with the heatpump shut off of course) and then the blower on the Keystoker comes on when it's up to temp. Works real well although I think I'm going to hook the two blowers to come on together and go off together.
Jim
TAMNOZ
 
Stove/Furnace Make: KEYSTOKER soon
Stove/Furnace Model: Koker

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