240005126 Rev A 10/27/2005
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not use direct drive motor connections as a source of
power for 120 VAC humidifiers and humidifier
transformers.
13. PIPING INSTALLATION
The entire fuel system should be installed in
accordance with the requirement of CAN/CSA B-139,
and local regulations. Use only an approved fuel oil
tanks piping, fittings and oil filter.
In the United States the installation must be in
accordance with NFPA No. 31 and local codes and
authorities.
Install the oil filter as close to the burner as possible.
For further details of the oil supply tank and piping
requirements, please refer to the instructions and
illustrations in the oil burner and oil pump instructions
shipped with the furnace.
14. OIL FILTER
All fuel systems should include an oil filter between the
fuel oil storage tank and the oil burner.
15. OIL BURNER NOZZLES
The HTL is certified for multiple firing rates, ranging
from 79,000 to 119,000 Btu/h. By selecting a nozzle
size that most closely matches the calculated building
heat loss, 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 ideal nozzle.
16. 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 HTL furnace operates most efficiently
with an approximate 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.
NOTE: FIELD CONTROLS 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.
17. 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.
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.
18. 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 down
combustion.
ALL FURNACE CONTROLS ARE SENSITIVE
AND SHOULD NOT BE SUBJECTED TO
TAMPERING. IF PROBLEMS PERSIST, CALL
YOUR SERVICE CONTRACTOR.
19. COMBUSTION CHAMBER
This furnace is equipped with a high quality cerafelt
combustion chamber. It is held in place by a retaining
bracket.
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.
