Beckett CF 2300A instruction manual Burner fuel flow, Fuel unit gearset capacities

Instruction Manual – Model CF2300A Oil Burner

Figure 9a – Two-pipe oil flow, low fire,“H” pump

• Use continuous lengths of heavy-wall copper tubing,

routed under the floor where possible. Do not attach fuel

d	c	c	300 psig
125 psig			b
to
175 psig

f

e

g

p

a

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. 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 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

k 2313a

Figure 9b – Two-pipe oil flow, high fire, “H” pump

• One-pipe systems – See Figure 8 for the fuel flow paths

for high-fire and low-fire operation. Figures 8a and 8b

are based on type H fuel units, with external by-pass pres-

sure regulator. The low-fire by-pass regulation is done in-

d	c	c	300 psig
300 psig			b

f

e

g

p

a

ternally for type B fuel units, shown in Figure 8c. Oil

supply connects to one of the fuel unit Inlet ports.

• Two-pipe systems – See Figure 9 for the fuel flow paths

for high-fire and low-fire operation. Figures 9a and 9b

are based on type H fuel units, with external by-pass pres-

sure regulator. The low-fire by-pass regulation is done in-

ternally for type B fuel units, shown in Figure 9c. 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 the oil

k 2313b

Figure 9c – Two-pipe oil flow with “B” pump

nozzle, causing full input.

• At low fire, the by-pass valve (item e) opens. For type H

fuel units, this allows oil to by-pass the nozzle path

through the external by-pass pressure regulator (item f).

			f
d	c	c
			b
		300 psig high fire	k
	125 to 175 psig low fire

h

g

p

a

2323a

For type B fuel units, the by-passing is done inside the

fuel unit when the by-pass valve operates.

• The by-pass oil flow is returned to the fuel unit Inlet

port for type H fuel units.

• This by-passing of oil reduces the oil pressure at the

nozzle (to between 125 psig and 175 psig), reducing

the input.

Table 3 – Fuel unit gearset capacities

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

a	Return port	f	By-pass pressure regulator
b	Nozzle port	g	Inlet port
c	Oil valves	h	By-pass valve (“ B” pump)
d	Nozzle & adapter	k	Return line to oil tank
e By-pass valve (“ H” pump)		m	One-pipe by-pass loop, ³⁄₈"
		p	Air bleed valve

Fuel unit	Gearset capacity
model number	(gallons per hour)
B2TA8852	39
H4PAN-C151H	69

Form 6104 BCF-23-R0399 9