Here's a good HVAC question I haven't seen here before...

In my house I've got two oil burners (hot air furnace and separate water heater) vented by a Field SWG power venter. At the
ripe old age of 8 years, the blower wheel (squirrel cage) in the power vent rusted out and actually lost a blade.

So I ordered a new wheel and installed it. The new wheel is stainless and is designed very slightly differently from the old
one, but is definitely the correct part and is intended to replace the one that was in there. I did *not* touch any
adjustments, just disassembled the venter enough to replace the wheel, replaced said wheel, and reassembled it.

So my question, finally: it seems like we're getting a lot more "burning oil" odor in the house than we were before. I can
easily believe this could just be the wind direction, but I wonder if changing that wheel might have changed the draft on the
oil burners enough that they're now not burning cleanly.

Anyone ever dealt with this before? Should I get a tech out to readjust the burners?

Eric Law
Wilmington, MA

Eric wrote:
Here's a good HVAC question I haven't seen here before...

In my house I've got two oil burners (hot air furnace and separate water heater) vented by a Field SWG power venter. At the
ripe old age of 8 years, the blower wheel (squirrel cage) in the power vent rusted out and actually lost a blade.

So I ordered a new wheel and installed it. The new wheel is stainless and is designed very slightly differently from the old
one, but is definitely the correct part and is intended to replace the one that was in there. I did *not* touch any
adjustments, just disassembled the venter enough to replace the wheel, replaced said wheel, and reassembled it.

So my question, finally: it seems like we're getting a lot more "burning oil" odor in the house than we were before. I can
easily believe this could just be the wind direction, but I wonder if changing that wheel might have changed the draft on the
oil burners enough that they're now not burning cleanly.

Anyone ever dealt with this before? Should I get a tech out to readjust the burners?

Eric Law
Wilmington, MA


If the wheel is designed differently as you described it certainly is
reasonable to think its performance has changed requiring a readjustment.

http://www.cnd-industry.com/

Seems to me, a question you might want to direct toward the techs at Fields
controls. The blower's controls won't allow the burner to fire unless a
sufficient air flow is established, so I can't imagine the smell coming from
inside the house



"Eric" wrote in message
g.com...
Here's a good HVAC question I haven't seen here before...

In my house I've got two oil burners (hot air furnace and separate water
heater) vented by a Field SWG power venter. At the ripe old age of 8
years, the blower wheel (squirrel cage) in the power vent rusted out and
actually lost a blade.

So I ordered a new wheel and installed it. The new wheel is stainless and
is designed very slightly differently from the old one, but is definitely
the correct part and is intended to replace the one that was in there. I
did *not* touch any adjustments, just disassembled the venter enough to
replace the wheel, replaced said wheel, and reassembled it.

So my question, finally: it seems like we're getting a lot more "burning
oil" odor in the house than we were before. I can easily believe this
could just be the wind direction, but I wonder if changing that wheel
might have changed the draft on the oil burners enough that they're now
not burning cleanly.

Anyone ever dealt with this before? Should I get a tech out to readjust
the burners?

Eric Law
Wilmington, MA

On Oct 26, 9:32 am, "Eric" wrote:
Here's a good HVAC question I haven't seen here before...

In my house I've got two oil burners (hot air furnace and separate water heater) vented by a Field SWG power venter. At the
ripe old age of 8 years, the blower wheel (squirrel cage) in the power vent rusted out and actually lost a blade.

So I ordered a new wheel and installed it. The new wheel is stainless and is designed very slightly differently from the old
one, but is definitely the correct part and is intended to replace the one that was in there. I did *not* touch any
adjustments, just disassembled the venter enough to replace the wheel, replaced said wheel, and reassembled it.

So my question, finally: it seems like we're getting a lot more "burning oil" odor in the house than we were before. I can
easily believe this could just be the wind direction, but I wonder if changing that wheel might have changed the draft on the
oil burners enough that they're now not burning cleanly.

Anyone ever dealt with this before? Should I get a tech out to readjust the burners?

Eric Law
Wilmington, MA

are you sure the new wheel is installed and of the correct design
such that it is pushing the air in the correct direction and not in
the opposite direction.

Someone that has more hands on experience than I do can answer this
question...if you put a squirrl cage blower wheel onto the motor shaft
backwards, will the airflow be reveresed?


Mark

The burner won't fire!!



"Mark" wrote in message
ps.com...
On Oct 26, 9:32 am, "Eric" wrote:
Here's a good HVAC question I haven't seen here before...

In my house I've got two oil burners (hot air furnace and separate water
heater) vented by a Field SWG power venter. At the
ripe old age of 8 years, the blower wheel (squirrel cage) in the power
vent rusted out and actually lost a blade.

So I ordered a new wheel and installed it. The new wheel is stainless
and is designed very slightly differently from the old
one, but is definitely the correct part and is intended to replace the
one that was in there. I did *not* touch any
adjustments, just disassembled the venter enough to replace the wheel,
replaced said wheel, and reassembled it.

So my question, finally: it seems like we're getting a lot more "burning
oil" odor in the house than we were before. I can
easily believe this could just be the wind direction, but I wonder if
changing that wheel might have changed the draft on the
oil burners enough that they're now not burning cleanly.

Anyone ever dealt with this before? Should I get a tech out to readjust
the burners?

Eric Law
Wilmington, MA

are you sure the new wheel is installed and of the correct design
such that it is pushing the air in the correct direction and not in
the opposite direction.

Someone that has more hands on experience than I do can answer this
question...if you put a squirrl cage blower wheel onto the motor shaft
backwards, will the airflow be reveresed?


Mark

No, it's definitely flowing considerable air in the correct direction. The
fumes are being taken outside the house, and it's generating enough draft to
operate the safety switch and allow the burners to run.

I'm just wondering if the airflow was a few percent different thru the
venter, how much would it affect the burners? I'd think the draft
regulators (there's one at the output of each appliance) would take care of
it to an extent.

Eric

"Mark" wrote in message
ps.com...
On Oct 26, 9:32 am, "Eric" wrote:
Here's a good HVAC question I haven't seen here before...

In my house I've got two oil burners (hot air furnace and separate water
heater) vented by a Field SWG power venter. At the
ripe old age of 8 years, the blower wheel (squirrel cage) in the power
vent rusted out and actually lost a blade.

So I ordered a new wheel and installed it. The new wheel is stainless
and is designed very slightly differently from the old
one, but is definitely the correct part and is intended to replace the
one that was in there. I did *not* touch any
adjustments, just disassembled the venter enough to replace the wheel,
replaced said wheel, and reassembled it.

So my question, finally: it seems like we're getting a lot more "burning
oil" odor in the house than we were before. I can
easily believe this could just be the wind direction, but I wonder if
changing that wheel might have changed the draft on the
oil burners enough that they're now not burning cleanly.

Anyone ever dealt with this before? Should I get a tech out to readjust
the burners?

Eric Law
Wilmington, MA

are you sure the new wheel is installed and of the correct design
such that it is pushing the air in the correct direction and not in
the opposite direction.

Someone that has more hands on experience than I do can answer this
question...if you put a squirrl cage blower wheel onto the motor shaft
backwards, will the airflow be reveresed?


Mark

That's a great idea!

I didn't think of it since there's nothing on their website about replacing
the squirrel cage separately. They want you to replace the entire motor
assembly (which includes the blower wheel).

I downloaded & read the motor-replacement procedure, it doesn't say anything
about readjusting the burner(s). So maybe there's my answer!

Eric

"RBM" rbm2(remove wrote in message
...
Seems to me, a question you might want to direct toward the techs at
Fields controls. The blower's controls won't allow the burner to fire
unless a sufficient air flow is established, so I can't imagine the smell
coming from inside the house



"Eric" wrote in message
g.com...
Here's a good HVAC question I haven't seen here before...

In my house I've got two oil burners (hot air furnace and separate water
heater) vented by a Field SWG power venter. At the ripe old age of 8
years, the blower wheel (squirrel cage) in the power vent rusted out and
actually lost a blade.

So I ordered a new wheel and installed it. The new wheel is stainless
and is designed very slightly differently from the old one, but is
definitely the correct part and is intended to replace the one that was
in there. I did *not* touch any adjustments, just disassembled the
venter enough to replace the wheel, replaced said wheel, and reassembled
it.

So my question, finally: it seems like we're getting a lot more "burning
oil" odor in the house than we were before. I can easily believe this
could just be the wind direction, but I wonder if changing that wheel
might have changed the draft on the oil burners enough that they're now
not burning cleanly.

Anyone ever dealt with this before? Should I get a tech out to readjust
the burners?

Eric Law
Wilmington, MA

"Mark" wrote in message
ps.com...
On Oct 26, 9:32 am, "Eric" wrote:
Here's a good HVAC question I haven't seen here before...

In my house I've got two oil burners (hot air furnace and separate water
heater) vented by a Field SWG power venter. At the
ripe old age of 8 years, the blower wheel (squirrel cage) in the power
vent rusted out and actually lost a blade.

So I ordered a new wheel and installed it. The new wheel is stainless
and is designed very slightly differently from the old
one, but is definitely the correct part and is intended to replace the
one that was in there. I did *not* touch any
adjustments, just disassembled the venter enough to replace the wheel,
replaced said wheel, and reassembled it.

So my question, finally: it seems like we're getting a lot more "burning
oil" odor in the house than we were before. I can
easily believe this could just be the wind direction, but I wonder if
changing that wheel might have changed the draft on the
oil burners enough that they're now not burning cleanly.

Anyone ever dealt with this before? Should I get a tech out to readjust
the burners?

Eric Law
Wilmington, MA

are you sure the new wheel is installed and of the correct design
such that it is pushing the air in the correct direction and not in
the opposite direction.

Someone that has more hands on experience than I do can answer this
question...if you put a squirrl cage blower wheel onto the motor shaft
backwards, will the airflow be reveresed?


Mark


Reversing the blower wheel will not cause the air flow to reverse but it can
effect the amount of flow.

Don Young

"Stormin Mormon" wrote in message
...
Shouldn't affect the burners. The burners use air which is provided from a
fan in the burner gun, which is a whole different air flow than the hot
air
to the building.

--

Christopher A. Young
.

I believe the OP indicated that he was talking about a draft blower, not a
hot air circulating blower.

Don Young .

"EL" wrote in message
ng.com...
No, it's definitely flowing considerable air in the correct direction.
The
fumes are being taken outside the house, and it's generating enough draft
to
operate the safety switch and allow the burners to run.

I'm just wondering if the airflow was a few percent different thru the
venter, how much would it affect the burners? I'd think the draft
regulators (there's one at the output of each appliance) would take care
of
it to an extent.

Eric