Beckett CF 2500/ 3500 Burner fuel flow, Two-pipe oil flow, one nozzle, low fire,H pump

Instruction Manual – Model CF2500/CF3500 Oil Burner

Figure 9a

Two-pipe oil flow, one nozzle, low fire,“H” pump

			200 psig	g
d	c	c	to
			300 psig
200 psig				b
to				a
300 psig				p

c

k

3512

•Install two high-quality shutoff valves in accessible loca- tions 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 8 for the fuel flow paths for high-fire and low-fire operation. Oil supply connects to one of the fuel unit Inlet ports.

Do not install by-pass plug in a one-pipe system. Could cause unit seal failure, oil leakage and potential fire and injury hazard if ignored.

•Two-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. Oil return connects to the fuel unit Return port.

Figure 9b

Two-pipe oil flow, two nozzles, high fire, “H” pump

			200 psig	g
	c	c	to
d			300 psig
200 psig				b
to				a
300 psig				p
	c
200 psig				k
to
300 psig				3513

Legend (for Figures 8a, 8b, 9a and 9b)

aReturn port

bNozzle port

cOil valves

dNozzle & adapter

gInlet port

kReturn line to oil tank

pAir bleed valve

By-pass plug must be installed in a two-pipe system. Failure to comply could cause unit seal failure, oil leakage and potential fire and injury hazard.

•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.

Form 6104 BCF-35-R0699 9