8
P/N 30149, Rev. G [12/15/2016]
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 115 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
BML and BMLV are certified for multiple firing rates, ranging
from 59,000 to 89,000 Btu/h output. 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-4, 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.
•
BML and BMLV 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.
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 in this manual for electrode
specifications.
• Thermostat wiring connections are shown in wiring
diagrams in Appendix B. Some micro-electronic
thermostats require additional controls and wiring.
Refer to thermostat manufacturer's instructions.
•
Locate thermostat approximately 5 feet above floor,
on inside wall, and where thermostat is exposed to
average room temperatures. Avoid locations where
thermostat is exposed to cold drafts, heat from
nearby lamps and appliances, exposure to sunlight,
heat from inside wall stacks, etc.
• Adjust thermostat heat anticipator to amperage
draw of heating control circuit as measured at "R"
and "W" terminals of thermostat. Do not measure
current with thermostat connected to the circuit.
Measure amperage by connecting ammeter between
two wires which connect to thermostat "R" and "W"
terminals.
