|
"Within
your particular area, select a Contractor who has the expertise to
enable
you to achieve optimal comfort, efficiency, and savings with your
Heating
and Air Conditioning system.
"A lot
of AC systems, older
furnace
air handlers and duct systems, are not delivering anywhere near the AC
Unit's BTUH and SEER Ratings. This is primarily due to inadequate cubic
feet per minute (cfm) of airflow through the evaporator coil, and/or
dirty
fins/coils and blower wheels.
Additionally,
even more common
in
northern areas of the USA, is the result of supply discharge air and
return
intake air being at the floor level where all the coldest air is merely
being recycled through the evaporator coil. It is near impossible to
fully
heat load an air conditioning evaporator when the air flow is recycling
too much of the cold supply air from the floor level. For
air conditioning,
the supply air outlets and air returns should be at, or near, the
8-foot
ceiling level.
The
later model furnaces with
bigger
horsepower blower motors and blower wheels can result in too much
airflow
through the cooling coil, the result is that some incompetent,
so-called,
technicians end-up overcharging the system, trying to get a beer can
cold
suction line. The result is greatly reduced btuh system capacity and a
deadly drop in the paid for SEER level!
Adjusting
the furnace for
maximum efficiency: This cannot be done by visual inspection alone; it
requires four different measurements made through a pencil-sized hole
in the flue pipe, close to the furnace. Flue gases will not
escape through the hole.
After
the furnace has been running for about 15
minutes to a steady flue temperature, a sample of the flue gases is
tested for its smoke content and the draft pressure is checked. The
final two measurements are then taken to determine the steady-state
efficiency of the furnace: these are the temperature and the carbon
dioxide or
oxygen content of the flue gases leaving the furnace.
All four
tests are necessary to properly adjust an oil furnace for optimal
performance.
You
can tell whether your furnace has ever been tested by
looking for a pencil-sized hole in the flue pipe. If there is no hole,
then the smoke level and draft pressure have never been tested, and the
steady-state efficiency has never been checked. If this is the case,
talk to your fuel oil supplier or service person about it.
Cleaning
the interior channel surface areas of oil furnace heat
exchanger. Use heat exchanger brushes and a
shop vac with a ten foot one inch diameter hose to remove soot buildup
from Thermo Pride OL11 heat exchanger cavities. These are difficult to
reach in many oil furnaces. This is critical to efficient performance
and safe burner operation!
It will pay you to find
an A/C
tech
that knows his field from A to Z.
Darrell
Udelhoven
udarrell.com
======================
DISCLAIMER:
Any
of
the HVAC companies I list on any of my web pages have nothing to do
with the information I post on any of my Web pages nor do I assume any
responsibility for how anyone uses that information.
All HVAC/R work
should always be done by a licensed Contractor! This information is
only placed on these pages for your understanding & communication
with contractors & techs.
This
information is for the edification of contractors and techs. I
am NOT liable for your screw-ups, you are liable for what you do! -
Darrell Udelhoven
Darrell's Refrigeration Heating and Air Conditioning -
Federal
Refrigerant Licensed - Retired
Licensed Contractor from another state.
"Getting
it done RIGHT, makes all the difference in the world."
Grant County, Iowa County, Lafayette County, Wisconsin;
Crawford County, Wisconsin; Fennimore, Wisconsin
Beetown,
Cassville, Potosi,
Dickeyville, Lancaster, Wisconsin
|
#1 HVAC Talk Community