Crown Boiler CHC68-96 用户手册

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18 
the gap between the outer surface of the air tube and the inner wall surface of 
the combustion chamber opening to provide a seal, keeping hot combustion 
gases within the chamber.  
 
6) 
Insert and secure the cable or conduit from the wiring harness in the burner 
junction box. Snap together the two (2) mating, multipin quick connections, on 
the wiring harness from the furnace fan center and the wiring harness of the oil 
burner, inside the burner junction box. 
 
•  For the Riello 40-F3 burner only, wiring connections are made inside 
the burner sound cover (an orange sheet metal shroud covering the 
front of the burner). Secure the cable or conduit to the burner 
enclosure back plate. 
 
The oil burner provided with this furnace requires initial inspection, set-up, and proper 
adjustment. Refer to this manual and the oil burner manufacturer’s operating 
instructions for detailed information on the following items.  
 
•  Initial firing of burner 
•  Adjusting the burner combustion air 
•  Adjusting the fuel pump pressure  
•  Setting the draft control 
 
NOTICE: This oil furnace must be installed and adjusted by only qualified oil 
heating contractor using calibrated combustion test instruments to ensure safe 
and reliable operation of the furnace. 
 
Fuel System Installation
  
 
In situations where the oil storage tank is installed at the same level with, or above, the 
burner, a single oil supply line run from the oil tank to the burner will be usually be 
adequate. No return line will be required. If the oil tank is installed below the burner and 
the lift exceeds approximately 8-ft. (6-1/2 ft. for the Riello 40-F3 burner), an oil supply 
line and an oil return line are recommended.  
 
Refer to the Standard for the Installation of Oil-Burning Equipment, NFPA 31-2001, and 
the oil burner operating instructions for detailed information on oil storage tank & oil 
supply/return line installation. 
 
NOTICE: We recommend installing a high efficiency oil filter, in the oil supply line, 
capable of filtering 10 to 20 micron diameter (or preferably smaller) particles from 
the fuel. 
 
If available, the use of ultra-low or low sulfur (less than 0.0015% S and 0.0015 - 
0.05% S, by weight, respectively), no. 2 fuel oil is highly recommended.
  Low sulfur 
fuel oil can help to significantly reduce instances of blockage and corrosion of the oil 
burner fuel delivery system (especially the nozzle), the furnace heat exchanger, and the 
flue gas venting system.  Air pollutants emitted by the furnace and the typical 
malodorous smell of oil combustion will be reduced.