13. OIL FILTER
All fuel systems should include an oil filter between the
fuel oil storage tank and the oil burner. When using an oil
burner nozzle smaller than 0.65 U.S. Gallons Per Hour,
install an additional 7 to 10 micron filter as close as
possible to the oil burner.
14. OIL BURNER NOZZLES
The POF1HD140AVFA and POF1HD091AVFA are
certified for multiple firing rates, ranging from 58,000 to
116,000 Btu/h. By manipulating the oil burner nozzle,
flame retention head, static plate and temperature rise;
the furnace may be fired at an ideal rate for a wide range
of structures. Refer to Table A-1 and the furnace rating
plate to determine the proper combinations.
15. OIL BURNER ADJUSTMENT
The burner air supply is adjusted to maintain the fuel to
air ratio to obtain ideal combustion conditions. A lack of
air causes "soft" and "sooty" flames, resulting in soot
build-up throughout the heat exchanger passages.
Excess combustion air causes a bright roaring fire and
high stack temperatures resulting in poor fuel efficiency.
The POF1HD140AVFA and POF1HD091AVFA furnaces
operate most efficiently with a No. 1 smoke spot on the
Bacharach Scale. This is not necessarily the optimum
setting; however, because dust will inevitably build up on
the air moving components of the oil burner assembly.
This will result in decreased air supply with the potential
result of soot building up in the flue gas passageways of
the heat exchanger. Soot behaves as an insulator and
impairs good heat transfer. Stack temperature will
increase, and the overall efficiency will decrease. As a
means of avoiding this problem, it is advisable to adjust
the air supply to provide no more than a trace smoke
spot on the Bacharach Scale.
BEFORE OPERATING THE FURNACE CHECK
CHAMBER. THE END CONE OF THE AIR TUBE
MUST BE CENTRED TO THE ACCOMODATING
RING PROVIDED IN THE DESIGN OF THE
16. BURNER ELECTRODES
Correct positioning of the electrode tips with respect
to each other, to the fuel oil nozzle, and to the rest of
the burners is essential for smooth light ups and
proper operation. Refer to the oil burner instructions
shipped with the furnace for electrode specifications.
specifications have been revised. They should be
adjusted to be 5/16" above the nozzle centerline.
17. BURNER PRIMARY (SAFETY) CONTROL
The furnace is equipped with a primary combustion
control, sometimes referred to as the burner relay or
burner protector relay, which uses a light sensing
device (cad cell) located in the burner housing, to
monitor and control combustion. Over time, dust or
combustion residuals can build up on the lens of the
cad cell impairing its response to the flame. The cad
cell should be checked for cleanliness and proper
alignment if the primary control frequently shuts
ALL FURNACE CONTROLS ARE SENSITIVE
AND SHOULD NOT BE SUBJECTED TO
TAMPERING. IF PROBLEMS PERSIST, CALL
YOUR SERVICE CONTRACTOR.
18. COMBUSTION CHAMBER
This furnace is equipped with a high quality cerafelt
combustion chamber. It is held in place by a
COMBUSTION CHAMBER AND OIL BURNER
BEFORE FIRING. IT IS POSSIBLE FOR THE
should be inspected for damage or carbon build up
whenever the oil burner is removed for repairs or
DO NOT START THE BURNER UNLESS THE
BLOWER ACCESS DOOR IS SECURED IN
The combustion chamber