28141 Rev A 10-27-06
7
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.
NOTE: SIDEWALL VENTED MODELS SHOULD
BE SET UP TO DELIVER ZERO (0)
SMOKE.
BEFORE OPERATING THE FURNACE
CHECK BURNER ALIGNMENT WITH
COMBUSTION CHAMBER. THE END
CONE OF THE AIR TUBE MUST BE
CENTRED TO THE ACCOMODATING
RING PROVIDED IN THE DESIGN OF
THE COMBUSTION CHAMBER. ADJUST
AS NECESSARY.
See the Venting Instructions included in the Vent
Kits for set-up details for sidewall vented
furnaces.
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 burner is essential for smooth light
ups and proper operation. Refer to the oil burner
instructions shipped with the furnace for electrode
specifications.
NOTE: Beckett AF Series Burner electrode
specifications have been revised. They should be
adjusted to be 5/16” above the nozzle centerline.
Use of Beckett’s “Z” gauge is recommended
17. BURNER PRIMARY CONTROL
The furnace is equipped with a primary
combustion control, sometimes refer 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
down combustion.
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 support bracket and stainless steel retaining
band and clamp.
CHECK THE ALIGNMENT OF
THE COMBUSTION CHAMBER AND OIL
BURNER BEFORE FIRING. IT IS POSSIBLE
FOR THE COMBUSTION CHAMBER TO SHIFT
IF SUBJECTED TO ROUGH HANDLING
DURING TRANSIT
. The combustion chamber
should be inspected for damage or carbon build
up whenever the oil burner is removed for repairs
or routine maintenance.
DO NOT START THE BURNER UNLESS
THE BLOWER ACCESS DOOR IS
SECURED IN PLACE.
19. CIRCULATING AIR BLOWER
The BCL and BFL furnaces are equipped with
either direct drive or belt drive blower systems.
Direct drive blower speed adjustments are not
normally required in properly sized extended
plenum duct systems. The motor RPM and air
CFM delivery will vary automatically to
accommodate conditions within the usual range of
external static pressures typical of residential duct
systems. Under-sized duct systems may require a
higher blower speed to obtain a reasonable
system temperature rise. Some older duct
systems were not designed to provide static
pressure. They typically feature special reducing
fittings at each branch run and lack block ends on
the trunk ducts. These systems may require
modification to provide some resistance to the
airflow to prevent over- amping of the direct drive
blower motor. Selecting a lower blower speed
Summary of Contents for BCL
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Page 24: ...28141 Rev A 10 27 06 24 TABLE B 2 BECKETT AND RIELLO DIRECT VENT WIRING DIAGRAM BCL S BFL ...
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