Beckett CF375 manual Wire the burner R7184, Electrical Shock Hazard, Fuel unit gearset capacities

Table 2 - Fuel unit gearset capacities

Fuel unit	Gearset capacity
model number	(gallons per hour)
A2EA-6520	17
A2VA-7116	17
A2YA-7916	20
B2VA-8216	21
B2YA-8916	25

yInstall two high-quality shut-off 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

yOne-pipe systems – See Figure 7 for the fuel flow path. y Figure 7 is based on type B fuel unit.

y Oil supply connects to one of the fuel unit inlet ports.

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

for two-pipe oil systems.

y Figure 8 is based on type B fuel unit .

y Oil supply connects to one of the fuel unit inlet ports. Oil return connects to the fuel unit return port. (Install the by-pass plug in the fuel unit for two-pipe sys- tems.)

Figure 7 - One-pipe oil flow with “B” pump

125-200 psig

125-200 psig

3502

Figure 8 - Two-pipe oil flow with “B” pump

Wire the burner — R7184

Electrical Shock Hazard

Electrical shock can cause severe personal in- jury or death.

yDisconnect electrical power before installing or servic- ing the burner.

yProvide ground wiring to the burner, metal control en- closures and accessories. (This may also be required to aid proper control system operation)

yPerform all wiring in compliance with the National Electric Code ANSI/NFPA 70 (Canada CSA C22.1).

Install the burner and all wiring in accordance with the National Electrical Code and all applicable local codes or requirements.

Wire the burner in compliance with all instructions provided by the appliance manufacturer. Verify operation of all controls in accordance with the appliance manufacturer’s guidelines.

Sequence of operation — typical

1.Standby — The burner is idle, waiting for a call for heat. When a call for heat is initiated, there is a 2- to 6-second delay while the control performs a safe start check.

2.Valve-on delay — As applicable, the ignition and motor are turned on for a 15-second prepurge.

3.Trial for ignition (TFI) — The fuel valve is opened, as ap- plicable. A flame should be established within the 15-sec- ond lockout time (30-second lockout time is available).

4.Lockout — If flame is not sensed by the end of the TFI, the control shuts down on safety lockout and must be manu- ally reset. If the control locks out three times in a row, the control enters restricted lockout. Call a qualified service technician.

5.Ignition carryover — Once flame is established, the igni- tion remains on for 10 seconds to ensure flame stability. It then turns off.

6.Run — The burner runs until the call for heat is satisfied. The burner is then sent to burner motor-off delay, as ap- plicable, or it is shut down and sent to standby.

125-200 psig

Legend

aReturn port

bNozzle port

cOil valve

dNozzle & adapter

125-200 psig

3503

gInlet port

kReturn line to oil tank p Air bleed valve

Figure 9. - Typical sequence of operation

	1
		Standby
2 Valve-on	3	Trial for	4
delay		ignition	Lockout
	5	Ignition

yNozzle pressure – The fuel unit nozzle port pressure is factory set at 140 psig. Some original equipment manufacturer burner applications may call for a lower pressure to obtain a required firing rate. Do not change this pressure unless directed to do so by the appliance manufacturer.

	carryover
8 Motor-off	6	7
delay	Run	Recycle
(postpurge)

6104 BCF3 R02 Page 9