Section:
Nozzle Pressure
Correct Nozzle and Flow
Rate Required
Incorrect nozzles and flow rates could result in impaired combustion, under- firing,
asphyxiation hazards.
Use only nozzles having the brand, flow rate (gph), spray angle and pattern specified by the appliance manufacturer.
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 12.00 gph nozzle at 200 psig = 16.97 gph and at 300 psig = 20.78 gph)
yFor typical nozzle flow rates at various pressures refer to Table 1.
The fuel unit nozzle port pressure is factory set at 300 psig. Some original equipment manufacturer burner applications 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.
Table 1 - Nozzle Capacities
Rated |
| Pressure - Pounds per square inch |
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gph |
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@ 100 | 125 | 150 | 175 | 200 | 250 | 300 | |
psig | |||||||
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5.00 | 5.59 | 6.13 | 6.61 | 7.07 | 7.50 | 8.66 | |
5.50 | 6.15 | 6.74 | 7.27 | 7.78 | 8.70 | 9.54 | |
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6.00 | 6.71 | 7.33 | 7.94 | 8.48 | 9.49 | 10.40 | |
6.50 | 7.26 | 7.96 | 8.60 | 9.20 | 10.30 | 11.25 | |
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7.00 | 7.82 | 8.56 | 9.25 | 9.90 | 11.06 | 12.12 | |
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7.50 | 8.38 | 9.19 | 9.91 | 10.60 | 11.85 | 13.00 | |
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8.00 | 8.94 | 9.80 | 10.58 | 11.31 | 12.65 | 13.85 | |
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8.50 | 9.50 | 10.45 | 11.27 | 12.06 | 13.40 | 14.70 | |
9.00 | 10.06 | 11.02 | 11.91 | 12.73 | 14.20 | 15.60 | |
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9.50 | 10.60 | 11.70 | 12.60 | 13.50 | 15.00 | 16.45 | |
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10.00 | 11.18 | 12.25 | 13.23 | 14.14 | 15.81 | 17.32 | |
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10.50 | 11.74 | 12.85 | 13.90 | 14.85 | 16.60 | 18.18 | |
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11.00 | 12.30 | 13.47 | 14.56 | 15.55 | 17.39 | 19.05 | |
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12.00 | 13.42 | 14.70 | 15.87 | 16.97 | 18.97 | 20.78 | |
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12.50 | 13.98 | 15.31 | 16.54 | 17.68 | 19.76 | 21.65 | |
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13.00 | 14.54 | 15.92 | 17.20 | 18.38 | 20.55 | 22.52 | |
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13.50 | 15.10 | 16.53 | 17.85 | 19.09 | 21.34 | 23.38 | |
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Electrical Supply
Verify that the power connections available are correct for the burner. Refer to Figure 1. All power must be supplied through fused disconnect switches.
Vent System
The flue gas venting system must be in good condition and must comply with all applicable codes.
Fire, Smoke & Asphyxiation
Hazard
yCarefully inspect the chimney or exhaust vent system.
yMake sure it is properly sized and in good working condition.
yFollow the instructions supplied by the appliance manufacturer.
yThe installation must strictly comply with all applicable codes, authorities having jurisdiction and the latest revision of the National Fire Protection Association Standard NFPA 31 for the installation of chimneys and vent sizing, (or
yRegulation by these authorities take precedence over the general instructions provided in this installation manual.
Verify Burner Components
○Burner nameplate (Figure 1), Model CF2500A/ CF2500/CF3500A
○Air tube assembly
○Mounting flange kit
○Pedestal mounting assembly kit (recommended)
○Oil nozzle, per Table 1 — Use only 45° to 70° solid pattern nozzles unless otherwise shown by appliance manufacturer or on the burner nameplate rating label.
The CF2500A, CF2500, and CF3500A are dual nozzle burners. To select the nozzles, use half of the maximum firing rate and select a nozzle under the 300 psig column. Select the corresponding nozzle from column 1 (Rated gph
@100 psig) two nozzles will be required. Example: a 5.00 gph nozzle at 300 psig = 8.66 gph
Verify Firing Rate
Refer to appliance manufacturer’s instructions (if available) for firing rate and nozzle selection. Otherwise, the maximum recommended firing rate for the burner depends on the length of the firing chamber and the distance from the burner center to the chamber floor. Verify that the chamber dimensions are at least as large as the minimum values given in Figure 2. If the appliance dimensions are smaller than recommended, reduce the firing rate accordingly.
CF2500/CF3500 Burner Manual
5