6.
Temperature Rise - Supply air temperature minus return air temperature. The temperature rise
across the furnace (operating at steady state conditions) should be approximately 75
º
F. A higher
temperature rise would slightly lower the efficiency. The supply air temperature should be
measured in the supply air trunk-line approximately 12 inches down stream of the plenum.
Do not exceed the maximum temperature rise as listed on the furnace nameplate
.
7.
Check operation of the cad cell relay by removing cad cell wire from external terminal of primary
safety control to ensure that it goes off on safety.
8.
Check blower motor amperage under both heating and air conditioning loads and ensure that the
amperage is less than the full load nameplate amperage of the blower motor.
Operating and Maintenance Instructions
The furnace must be installed, adjusted and maintained only by a qualified service
agency annually. Have your unit inspected, cleaned and adjusted at least once a year to assure proper
operation. Do not tamper with the unit or controls. Incorrect operation of the unit could result in
severe personal injury and property damage.
WARNING
Never attempt to use gasoline in the furnace.
Never store gasoline or other combustible materials near the burner or appliance. The area around the
furnace should be kept clear of all combustible materials.
Never attempt to burn garbage or refuse in the furnace.
Never attempt to light the furnace by throwing burning material into the furnace.
Never attempt to use crankcase or waste oil or materials other than the approved fuel oils in this
furnace.
Never restrict the air inlet openings to the burner.
Do not attempt to start the furnace when excess oil has accumulated in the chamber or the furnace is
full of vapors.
Cleaning
Cleaning the heat exchanger must be done yearly by a qualified service technician.
WARNING
It is important to inspect and clean the heat exchanger once annually or as necessary to remove any
build up of soot. A layer of soot on the inside surface of the heat exchanger will result in reduced
efficiency.
HB/LB
1.
Turn off all power to the furnace.
2.
Remove the upper pouch plate and the flue pipe.
3.
Lower the combustion baffle
4.
Using a soft 2" flue brush, cleaning the upper half of each corrugation of any soot buildup.
5.
Inspect heat exchanger and combustion chamber.
6.
Place the combustion baffle back to its original position and proceed to clean the lower half
with the flue brush.
7.
Vacuum any loose debris.
8.
Replace the upper pouch plate and flue pipe. Should any of the gaskets break or otherwise
not be able to provide an adequate seal, the gasket should be replaced before reassembly.
9.
Clean and readjust the oil burner as required.
22
Summary of Contents for HBD1 15
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