rotating backward

rotating backward

PostBy: Normy On: Fri Dec 27, 2013 7:25 pm

Found a new issue while cleaning my gearbox and oil pan areas, I 99% believe the motor for the blower is rotating in the wrong direction. Looking at the open side where the shaft connects to the gearbox, the fan will rotate clockwise. I read some posts stating it should rotate counter clockwise. Is this correct from the viewing angle I mentioned.

I tried to cross the wires in the electrical box (where the motor is spliced), just to see if it would rotate other way, no deal, same direction. Of course I put them back.

I never really noticed anything odd with the fire when in demand, I still see air blowing the flame, but I keep the air setting 5 or less. I never really get the dark center ring like everyone else, is this why?

Any suggestions?

Thanks
Normy
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: Rob R. On: Fri Dec 27, 2013 7:31 pm

The motor should have a reverse switch.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: rotating backward

PostBy: Normy On: Fri Dec 27, 2013 8:29 pm

Hi, here are a couple of pics.

Is the switch the red thing in the first pic, or is it under the black thing in the second pic?

Thanks

Normy
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Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: Rob R. On: Fri Dec 27, 2013 8:34 pm

black thing in 2nd picture.

nice job cleaning things up.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: rotating backward

PostBy: Normy On: Fri Dec 27, 2013 8:45 pm

Thanks Rob, I used Purple Power spray from NAPA, worked good.

Rob R. wrote:black thing in 2nd picture.

nice job cleaning things up.
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: Normy On: Fri Dec 27, 2013 9:38 pm

Sure enough, it was running in reverse. Once I moved the switch (I think the motor itself was wired wrong), and turned on the demand, the flames were sky high and the "black spot" in dead center was well pronounced and coals are really hot.

Night and day compared to previous.
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: Rob R. On: Fri Dec 27, 2013 9:39 pm

You will need to make it run for 30-40 minutes and observe the ash ring, adjust the air as necessary.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: rotating backward

PostBy: Normy On: Fri Dec 27, 2013 11:48 pm

I was at 5 clicks, 6 air prior. I dropped it to 4 clicks, 5 air. I'll try to tune it in tomorrow during the day.

Thanks

Rob R. wrote:You will need to make it run for 30-40 minutes and observe the ash ring, adjust the air as necessary.
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: stoker-man On: Sat Dec 28, 2013 7:05 am

I discovered this switch issue about 4 years ago and posted on here. They came from the factory with the switch in the wrong position.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: rotating backward

PostBy: Normy On: Sat Dec 28, 2013 9:31 pm

Yes, I happened upon the "string", which gave me the idea to double check. :)

stoker-man wrote:I discovered this switch issue about 4 years ago and posted on here. They came from the factory with the switch in the wrong position.
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: Normy On: Sat Dec 28, 2013 9:52 pm

I set the draft at .04 & over the fire at ~ .015, brought the clicks back up to 5 & the air a smidge above 5 (all on full demand 40+ minutes continuous). The ash ring is between 1.5 & 2 inch. So I think it's ok with the outside temps. Living it CT., we always seem to have some big temp swings thru out the winter.

A penny for your thoughts......... I run a programmable thermostat, during the week no ones home I keep it set for 62, when we are home I have it set for 70, (but I like to manually bump it up to 73. Bed time, its set to drop to 62 until 4:30am when it set for 68 until 6:30am, back to 62. (This is how I used to run oil). The question is....I want to use as less coal as possible, should I keep the current settings, or should they be bumped up even though no one will be home, so there is not such a big recovery temp to get back up to 70+. (Usually the actual temp is around 64-65 when no one is home and the outside temp is around 20 +/- 5.)

I haven't vacuumed the baseboards yet, I need to do this too.

Thanks
Normy

Normy wrote:I was at 5 clicks, 6 air prior. I dropped it to 4 clicks, 5 air. I'll try to tune it in tomorrow during the day.

Thanks

Rob R. wrote:You will need to make it run for 30-40 minutes and observe the ash ring, adjust the air as necessary.
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: Rob R. On: Sat Dec 28, 2013 10:06 pm

How long does the stoker run while bringing the house out of setback? Does the boiler overshoot when the thermostat stops calling for heat?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: rotating backward

PostBy: Normy On: Sun Dec 29, 2013 12:47 pm

The boiler can run up to an hour, but the thermostat is also slow to reach temp leaving me to believe the baseboards are full of dust etc . I can't say it over shoots, but it did reach the high limit and shut off while still calling for heat. I have the aquastat set HL 195, LL 175, diff 10.

It's probably worth noting I had to add a draft inducer on the horizontal section of the exhaust pipe with a variable switch, with a some safety devices that automatically cut off all power to the unit if it attempts to run above high limit. Also it will not turn on if the inducer is too low to pull a vacuum. I try to set the inducer to run a bit above minimum to use the least amount of electricity (it runs up the bill). Once I set the inducer as low as I dare, I tried to set the draft to .04 & the over fire to .02, while the air I want it as high as I could without loosing the negative pressure over the fire. Air is at 5, and I up'd the clicks to 5 hoping it won't run long and still burn coal to complete ash as possible.

I do have a portable humidifier close to the thermostat which may or may not influence the demand run time. I did plan on moving that too & clean baseboard.

Rob R. wrote:How long does the stoker run while bringing the house out of setback? Does the boiler overshoot when the thermostat stops calling for heat?
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: rotating backward

PostBy: stoker-man On: Sun Dec 29, 2013 1:58 pm

efm recommended keeping the high 40º above the low limit and that's what I always did. 50º in the Summer. This prevents outfires. It's not unusual for the temp of the boiler to go up 20-40º after the stoker shuts off.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: rotating backward

PostBy: Normy On: Mon Dec 30, 2013 10:07 pm

Thanks, so I changed it to the 40º spread as recommended. Also lowered the air to 4.5 with a 5 click as the recommend.

Thanks
Normy

stoker-man wrote:efm recommended keeping the high 40º above the low limit and that's what I always did. 50º in the Summer. This prevents outfires. It's not unusual for the temp of the boiler to go up 20-40º after the stoker shuts off.
Normy
 
Coal Size/Type: rice
Stove/Furnace Make: EFM
Stove/Furnace Model: 520