Emergency Help for gas furnace?

Emergency Help for gas furnace?

PostBy: Richard S. On: Sat Mar 21, 2009 5:08 pm

My buddy has gas furnace that is eating transformers, anybody know anything about them and what could possibly cause this?

It's a well-mcclain and they installed a transformer and it got burned up in 18 seconds.

If you're famialiar with these units PM me.
Richard S.
 
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite

Re: Emergency Help for gas furnace?

PostBy: 009to090 On: Sat Mar 21, 2009 6:41 pm

any generic xformer that smokes in 18 secs, its gotta be a short somewhere
009to090
 
Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

Re: Emergency Help for gas furnace?

PostBy: jim d On: Sat Mar 21, 2009 7:12 pm

sounds like a dead short on 24v side get your cont. tester out and start looking ,are you sure it's a furnace
jim d
 
Stove/Furnace Make: alaska//coaljck
Stove/Furnace Model: liberty// cj3


Re: Emergency Help for gas furnace?

PostBy: rberq On: Sat Mar 21, 2009 7:57 pm

Is it possible it's getting 220v instead of 110v?
rberq
 
Hand Fed Coal Stove: DS Machine 1300
Coal Size/Type: Nut -- Kimmel/Blaschak/Reading
Other Heating: Oil hot water radiators, propane

Re: Emergency Help for gas furnace?

PostBy: Poconoeagle On: Sat Mar 21, 2009 8:10 pm

18 seconds is a long time for a 220/110 issue I think. a mere 1-3 seconds would be more likley for a high voltage issue. the 24 volt side is prolly where a short is. measure the resistance in each circut, also for continuity .

what model mc clain?
Poconoeagle
 
Stove/Furnace Make: Buckwalter & Co. , EFM520
Stove/Furnace Model: No. 28 Glenwood 1880, Alaska

Re: Emergency Help for gas furnace?

PostBy: Richard S. On: Sun Mar 22, 2009 2:43 am

Well they "fixed" it for the time being, not sure what they did but it's not permanent. It was for an apartment which was what the emergency was. Looks like they'll have someone come in this week to really fix it.

Thanks.
Richard S.
 
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite

Re: Emergency Help for gas furnace?

PostBy: Dann757 On: Sun Mar 22, 2009 9:28 am

A pine branch fell on my friend's service entrance wires once and broke the neutral wire in two. With no neutral to the house, a bunch of transformers blew, including one on the furnace.

In a separate incident, an electrician had done some wiring at her house during the construction of her addition;
I stayed out of the way during that circus of incompetency. Later I tapped into a 110v junction box to power her furnace and a few components blew immediately. The "electrician" had rewired the junction box to carry 220v, with no indication of it on the white neutral wires. I inadvertantly ran 220 to the furnace. I took something for granted, that's the way it always goes.
Dann757
 

Re: Emergency Help for gas furnace?

PostBy: rberq On: Sun Mar 22, 2009 12:51 pm

Richard S. wrote:Looks like they'll have someone come in this week to really fix it.

If you find out what the problem was, post it so we'll all learn from it.
rberq
 
Hand Fed Coal Stove: DS Machine 1300
Coal Size/Type: Nut -- Kimmel/Blaschak/Reading
Other Heating: Oil hot water radiators, propane

Re: Emergency Help for gas furnace?

PostBy: steamup On: Mon Mar 23, 2009 12:59 pm

1. Make sure the replacement transformer VA rating is equal to or larger than the orginal transformer.

2. Consider fusing the secondary side. You can buy transformers with a built in circuit breaker. Inline fuses work just as well and are cheaper than transformers.

3. Check for shorts and voltage backfeed on the secondary. This winter I had an instance where a squirrel chewed the insulation off of some wires. The 110v line touched the 24v control wire. Burned out the transformer, control board and thermostat in a flash.

4. Check the thermostat. Could be it has a problem.

good luck.
steamup
 
Stoker Coal Boiler: Axeman-Anderson AA-130, Keystoker K-6
Hand Fed Coal Boiler: HS Tarm 502 Wood/Coal/Oil
Coal Size/Type: pea, buck, rice