Beckett CF2500 manual Connect Fuel Lines

Page 10

Section: Connect Fuel Lines

Connect Fuel Lines

Fuel Unit By-pass Plug

Factory-Installed Pump

Bypass Plug

Failure to follow these guidelines will cause the fuel pump seals to rupture and result in oil leakage, burner malfunction and potential fire and injury hazards.

yModels CF2500A/CF2500/CF3500 are shipped with the pump by-pass plug installed.

yDo not remove the by-pass plug from the pump. It is required for step-firing (Lo/Hi) operation.

yDo not operate the burner unless a return line or by- pass loop is installed or the pump seal will rupture.

yCarefully comply with the following instructions provided in this section of the manual.

Install Oil Supply To

Specifications

Failure to properly install the oil supply system could cause oil leakage, equipment malfunction, puff-back of hot gases, heavy smoke, asphyxiation,

explosion and fire hazards.

yCarefully install the oil supply lines, fittings and components using the guidelines provided in this section.

yThe oil supply must comply with the latest edition of NFPA 31 (Canada CSA B139) and all applicable codes.

yDo NOT install valves in the return line.

yIf the oil supply inlet pressure to the pump exceeds 3 psig or for gravity feed systems, install an oil safety or pressure reducing valve (Webster OSV, Suntec PRV or equivalent).

Oil Supply/Return Lines

Install the oil tank and oil lines in accordance with all applicable codes.

Size the oil supply and return lines using the guidelines given in the fuel unit literature included in the literature envelope. Oil line flow rate will equal the burner rate for one-pipe systems. For two-pipe systems, refer to Table 3 for the fuel unit gearset capacity - the rate at which fuel is recirculated when connected to a two-pipe system. Size two-pipe oil lines based on this flow rate.

Use continuous lengths of heavy-wall copper tubing, routed under the floor where possible. Do not attach fuel lines to the appliance or to floor joists if possible. This reduces vibration and noise transmission problems.

Install an oil filter sized to handle the fuel unit gearset flow capacity (Table 3) for two-pipe systems. However, size the filter for the firing rate for one-pipe systems. Locate the filter immediately adjacent to the burner fuel unit.

Install two high-quality shutoff valves in accessible locations on the oil supply line. Locate one valve close to the tank. Locate the other valve close to the burner, upstream of the fuel filter.

Burner Fuel Flow

One-pipe systems – See Figure 9 for the fuel flow paths for high-fire and low-fire operation. Oil supply connects to one of the fuel unit Inlet ports. A field- installed bypass loop (Figure 9 Item K) must be installed.

Two-pipe systems – See Figure 10 for the fuel flow paths for high-fire and low-fire operation. Oil supply connects to one of the fuel unit Inlet ports. Oil return connects to the fuel unit Return port. Low-fire/high-fire operation – The fuel unit nozzle port pressure is factory set at 300 psig.

At high fire, full pressure (300 psig) is applied at both oil nozzles, causing full input.

At low fire, full pressure (300 psig) is applied at one nozzle, causing reduced input.

One-pipe Oil System By-pass Loop

Refer to Figure 9 (item k). Note the addition of a field- installed by-pass loop (use 3/8” copper tubing) from the fuel unit Return port to the Inlet port. This line is required for low/high operation. It simulates the flow of a two-pipe system at the fuel unit.

Table 3 – Fuel Unit Gearset Capacities

Fuel Unit Model

Gearset Capacity

Number

(gph)

 

 

H5PAN-C100H

79

 

 

10

Image 10
Contents Potential for Fire, Smoke and Asphyxiation Hazards To the Homeowner or Equipment OwnerContents Hazard Definitions General InformationFrozen Plumbing Water Damage Hazard Clearances Pre-installation ChecklistFuel Supply Oil Supply Pressure Control Required Vent System Nozzle Pressure Correct Nozzle and Flow Rate RequiredElectrical Supply Fire, Smoke & Asphyxiation HazardVerify Air Tube Air Tube Combination CodesProtect the Air Tube From Overheating Mount the BurnerDust and Moisture Protect Against Dust Mount Flanges on Air TubeInstall Nozzle Line Assembly Install NozzleCheck Electrode Settings Maintain Electrode Specifications Mount Air Tube to BurnerSet Dimension Z Insert BurnerConnect Fuel Lines Psig to Electrical Shock Hazard Wire the BurnerIncorrect Wiring Will Result in Improper Control Operation Fire or Explosion HazardStandby Cad Cell Resistance MeasurementTypical Wiring 7505P Typical Burner Sequence of Operation RM7897A Control Typical Burner Sequence Operation RM7897ADo Not Bypass Safety Controls Professional Installation Service RequiredKeep Service Access Covers Securely Installed Adjusting Plate Assembly DimensionInitial Head Position Initial Air Settings Damper Motor with CoverSet Appliance Limit Controls Professional Service RequiredStart the Burner Prepare the Fuel Unit for Air VentingIf burner stops during venting Set High-fire AirSet Low-fire Air If burner stops after flame establishedAnnual Professional Service Required Perform Regular MaintenanceMonthly Maintenance by owner Replacement Parts Description CF2500 Part No CF3500 Part NoFlange a Limited Warranty Information