Beckett CF500, 800 manual Wire the burner R7184, Sequence of operation, Electrical Shock Hazard

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.

See Figure 10 for a typical wiring diagram, with R7184 oil primary, for reference purposes only.

Figure 10. - Typical wiring

Legend (Figure 10)

FD	Fused disconnect
LM	Limit controls
OP	Operating controls
PP	Oil primary controls
CC	Flame sensor, CAD cell type
TR	Ignition transformer
M1	Burner motor
S1	Oil valve
T-T	24-volt thermostat
F-F	Flame sensor terminals

10

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 3- to 10-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-second 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 manually 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 ignition 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 applicable, or it is shut down and sent to standby.

7.Recycle — If the flame is lost while the burner is firing, the control shuts down the burner, enters a 60-second recycle de- lay, and then repeats the ignition steps outlined above. If the flame is lost three times in a row, the control locks out to pre- vent continuous cycling with repetitious flame loss caused by poor combustion.

8.Burner motor-off delay — If applicable, the fuel valve is closed and the burner motor is kept on for the selected post- purge time before the control returns the burner to standby.

Resetting to cad cell

yIf the control locks out three times in a row without a com- plete heat cycle between attempts, the lockout becomes re- stricted. A qualified service technician should be called to inspect the burner.

Figure 11. - Typical sequence of operation

1

			Standby
2	Valve-on	3	Trial for	4
	delay		ignition	Lockout
		5	Ignition
			carryover
8 Motor-off		6		7
	delay		Run	Recycle
	(postpurge)
			6104 BCF5 R07