Operating instructions

8
13. Humidifi er
• Humidifi er is optional accessory available through
most heating supplies outlets.
• Follow humidifi er manufacturer's installation
instructions
• Protect furnace heat exchanger from water or water
droplets from humidifi er.
• Do not use direct drive motor connections as source
of power for 120 VAC humidifi ers and humidifi er
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, fi ttings and
oil fi lter.
• Install oil fi lter 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 fi lter between fuel oil storage tank and oil burner.
When using oil burner nozzle smaller than 0.65 U.S. Gal-
lons Per Hour, install additional 7 to 10 micron fi lter as
close as possible to oil burner.
16. Oil Burner Nozzles
HML and HMLV are certifi ed for multiple fi ring rates,
ranging from 59,000 to 96,000 Btu/h output. Furnace
may be fi red at ideal rate for wide range of structures by
manipulating oil burner nozzle, fl ame 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" fl ames, resulting
in soot build-up throughout heat exchanger passages.
• Excess combustion air causes bright roaring fi re
and high stack temperatures resulting in poor fuel
effi ciency.
• HML and HMLV operate most effi ciently 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 fl ue gas passageways
of heat exchanger. Soot behaves as insulator and
impairs good heat transfer. Stack temperature
increases, and effi ciency 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
specifi cations.
• 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 fl oor,
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.