Airco BCL-190, Installation, Operation & Maintenance Manual

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PN 28141 REV. K [10/30/2018]
13. Humidifier
• Humidifier is optional accessory available through
most heating supplies outlets.
• Follow humidifier manufacturer's installation
instructions
• Protect furnace heat exchanger from water or water
droplets from humidifier.
• Do not use direct drive motor connections as source
of power for 120 VAC humidifiers and humidifier
transformers.
14. Piping Installation
• Install fuel system in accordance with requirements
of CAN/CSA B-139, and local regulations.
• United States installation shall conform to NFPA No.
31 and local codes and authorities.
• Use only approved fuel oil tanks, piping, fittings and
oil filter.
• Install oil filter as close to burner as possible.
• Refer to instructions and illustrations in oil burner and
oil pump instructions shipped with the furnace.
15. Oil Filter
Install oil filter between fuel oil storage tank and oil burner.
When using oil burner nozzle smaller than 0.65 U.S.
Gallons Per Hour, install additional 7 to 10 micron filter as
close as possible to oil burner.
16. Oil Burner Nozzles
Furnaces are certified for multiple firing rates. Furnace
may be fired at ideal rate for wide range of structures by
manipulating oil burner, nozzle, flame retention head, and
temperature rise. Refer to Table A-1 thru A-3, and furnace
rating plate to determine proper combinations.
17. Oil Burner Adjustment
• Adjust burner air supply to maintain fuel to air ratio
to obtain ideal combustion conditions.
• Lack of air causes "soft" and "sooty" flames, resulting
in soot build-up throughout heat exchanger passages.
• Excess combustion air causes bright roaring fire and high
stack temperatures resulting in poor fuel efficiency.
• Furnaces operate most efficiently with No. 1 smoke
spot on Bacharach Scale. Dust will eventually build
up on air moving components of oil burner assembly
resulting in decreased air supply with potential soot
build up in flue gas passageways of heat exchanger.
Soot behaves as insulator and impairs good heat
transfer. Stack temperature increases, and efficiency
decreases. To avoid this problem, adjust the air
supply to provide no more than trace smoke spot on
Bacharach Scale.
• See Venting Instructions included in Vent Kits for set-
up details for sidewall vented furnaces.
19. Burner Primary (Safety) Control
Furnace is equipped with primary combustion control, also
referred to as burner relay or burner protector relay, which
uses a cad cell located in burner housing, to monitor and
control combustion.
Dust or combustion residuals can build up on lens of
cad cell impairing its response to flame. Check cad cell
for cleanliness and proper alignment if primary control
frequently shuts down combustion.
20. Combustion Chamber
Furnace is equipped with cerafelt combustion chamber, 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.
Inspect combustion chamber for damage or carbon build
up whenever oil burner is removed for repairs or routine
maintenance.
NOTICE
Set up sidewall vented models to deliver zero (0)
smoke.
NOTICE
Before operating furnace check burner alignment
with combustion chamber. End cone of air tube must
be centred to accommodating ring of combustion
chamber. Adjust as necessary.
18. Burner Electrodes
Correct positioning of electrode tips with respect to each
other, fuel oil nozzle, and burners is essential for smooth
light ups and proper operation.
Refer to oil burner instructions provided with furnace and
Appendix A Section A.2 for electrode specifications.
NOTICE
Do not tamper with furnace controls they are
sensitive. If problems persist, call your service
contractor.