Fuel oil burner

The fuel oil burner for my home furnace system.

Problem state

Primary control locked out or failing.

Holding red button for extended period of time (30 seconds, 60 seconds) does not clear the lockout.

Diagnosis:

1. Hardware is good, control unit is in locked state, unlock procedure needed
2. Control unit is bad, needs repair
3. Oil pump bad, needs repair

I think the oil pump (3) is least likely. The control system is the problem.

Oil burner

Beckett.

Primary control

White Rodgers 668-451 Oil Burner Primary Control with Transformer.

Beckett oil burner and White-Rodgers primary control unit.

White-Rodgers 668-451 Kwik-Sensor Cad Cell Relay Oil Burner Control 2-Wire 45-Second Timer & External Transformer

This is a "stack relay" device — an older technology.

Specifications

ELECTRICAL DATA

Input voltage: 120 VAC, 60Hz.

Maximum Load Current:

Oil Burner Motor (Orange Wire): 10 Amps F.L. 60 Amps L.R.

Ignition Transformer: 360VA (3.0 Amps)

Relay Voltage: 24 Volts AC, 60Hz.

Room Thermostat:

Set adjustable heat anticipator at 0.4 Amps.

Low Voltage Rating (Terminals R&C):

Maximum cooling load of 40VA @ 24v. 60 Hz.

Continuous duty. W & C cycled through thermostat.

Safety Timing: 45 seconds

Documentation

• White-Rodgers 668-451 Installation Manual
• Reset Button Operation on Primary Controls for Oil Fired Heating Equipment
• Cad Cell Relay Switches on Oil Burners
• Tech specs, replacement parts
• Tech specs, replacement parts

Safety

• Oil Burner Puffbacks - an explosion of un-burned oil in the combustion chamber of an oil-fired boiler, furnace, or water heater.

See also

• Oil burner @ Wikipedia