Power Flame UCM-1000, Installation And Operation Manual

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Refer to Figure 4 for fuel pump oil piping connection information. Further information relating to burner oil piping
can be found in Table 3.
Burner
Model
Pump Suction Compressor Flow
Capacity (GPH)
Rate (CFM) @
145 psi
UCM-200 130 10.8
UCM-250 130 10.8
UCM-300 130 10.8
UCM-350 220 20.5
UCM-400 220 20.5
UCM-500 220 20.5
UCM-600 220 20.5
UCM-700 292 28.8
UCM-800 292 28.8
UCM-900 480 28.8
UCM-1000 480 28.8
UCM-1100 480 28.8
UCM-1200 480 28.8
UCM-1300 510 46.4
Table 3: Oil Pump Suction/Compressor CFM Capacity Chart
2.2.10 It is very important to properly size the oil suction line and oil filter, to provide fuel flow to the burner
without exceeding 10” suction pressure (vacuum) at the oil pump suction port. The method to properly
size the fuel pump supply line is outlined below.
1)
Check oil pump GPH Suction Capacity shown in Table 3 to pipe size shown in Figure 3, Oil Line
Sizing.
2) Measure total piping length (horizontal and vertical) from the end of the line in the tank, to the
connection at the oil pump.
3) Choose the appropriate graph below based on the pipe size. Read up from horizontal line Total
Feet of Iron pipe to Suction Capacity in GPH.
4) Read left to the vertical line Inches of Vacuum at Fuel-Unit. (This is the vacuum required to draw
oil through the length of pipe selected.)
5) If installation has lift (Lift is defined as the vertical distance the fuel unit(pump) is above the top of
the tank) add 1” of vacuum for every foot of lift.
6) Add the vacuum determined from items 4 and 5 together to determine total inches of vacuum.
7) If total is over 10”, move to next larger pipe size chart and re-calculate total inches of vacuum.
8) The instructions above do not allow for any added restrictions, such as line filter, elbows, sharp
bends, check valves, etc. Suction line vacuum values for such components vary from one
manufacturer to another.
9) It is always safe to size the return line from the pump to the tank at the same size as the selected
suction line.
10) A Rule of Thumb to determine total vacuum for suction line sizing is to add 10% to vacuum
determined from Figure 3 calculations.
11) If a pressure feed (Flooded Loop, Remote Feed Pump, etc) is used to supply oil to the burner oil
pump, pressure at the pump inlet must be kept below 3 PSI to comply with NFPA 85.