Combustion air supply
yThe burner requires combustion air and ventilation air for reliable operation. Assure that the building and/or com- bustion air openings comply with National Fire Protec- tion Standard for
yIf there is a risk of the space being under negative pres- sure or of exhaust fans or other devices depleting available air for combustion and ventilation, the appliance/burner should be installed in an isolated room provided with out- side combustion air.
Clearances
yWith the burner installed in the appliance, there must be adequate space in front of and on the sides of the burner to allow access and operation. Verify that the clearance dimensions comply with all local codes and with the ap- pliance manufacturer’s recommendations.
Fuel supply
yThe fuel supply piping and tank must provide #1 or #2 fuel oil at pressure or vacuum conditions suitable for the fuel unit (oil pump) on the burner. Refer to fuel unit literature in the literature envelope in the burner carton to verify al- lowable suction pressure.
Oil Supply Pressure
Control Required
Damage to the pump, filter or other compo- nent seals could cause possible oil leakage and potential fire hazard.
yThe oil supply inlet pressure to the fuel unit cannot exceed 3 psig.
yDo NOT install valves in return line.
yEnsure that a
If fuel supply is level with or higher than fuel unit —
yWhen the fuel unit is not required to lift the oil, the instal- lation is usually suitable for either a
yRefer to the Mount the Burner Section of this manual for
If fuel supply is below the fuel unit —
yUse a
Nozzle pressure
Correct Nozzle and Flow
Rate Required
Incorrect nozzles and flow rates could result in impaired combustion,
Use only nozzles having the brand, flow rate (gph), spray angle and pattern specified by the appliance manufac- turer.
Follow the appliance manufacturer’s specifications for the required pump outlet pressure for the nozzle, since this affects the flow rate.
yNozzle manufacturers calibrate nozzle flow rates at 100 psig.
yThis burner utilizes pressures higher than 100 psig, so the actual nozzle flow rate will be greater than the gph stamped on the nozzle body. (Example: A 4.00 gph nozzle at 140 psig = 4.75 gph.
yFor typical nozzle flow rates at various pressures see accompanying chart.
yThe fuel unit nozzle port pressure is factory set at 140 psig. Some original equipment manufacturer burner appli- cations may call for a lower pressure to obtain a required firing rate. Do not change this pressure unless directed to do so by the appliance manufacturer.
ySee burner nameplate rating label for factory settings and specifications.
Vent system
yThe flue gas venting system must be in good condition and must comply with all applicable codes.
Electrical supply
yVerify that the power connections available are correct for the burner. All power must be supplied through fused dis- connect switches.
Verify burner components —
yBurner, Model CF500 or CF800
yAir tube assembly
yMounting flange kit
yOil nozzle, per Table 1 — Only 45° to 70° solid pattern nozzles are recommended unless otherwise specified by appliance manufacturer. (See specific appliance recom- mendation sheet or refer to OEM Spec Guide). Find the required firing rate in the 140 psig column
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