
Section: Connect Fuel Lines
Connect Fuel Lines
Fuel Unit
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
yDo not remove the
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,
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
○Use continuous lengths of
○Install an oil filter sized to handle the fuel unit gearset flow capacity (Table 3) for
○Install two
Burner Fuel Flow
○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
Table 3 – Fuel Unit Gearset Capacities
Fuel Unit Model | Gearset Capacity |
Number | (gph) |
|
|
79 | |
|
|
10