Weil-McLain 550-141-830/1202 SGO with probe-typelow water cutoff, Start-up, Pressure Control

Start-up

SGO with probe-type low water cutoff:

1.If burner does not fire, check for:

●Service switch on boiler or additional switches turned off.

●Fuses or breaker switch tripped.

●Thermostat set below room temperature.

●Fuel valves turned off.

●Not enough oil in tank to supply burner.

●No water in gauge glass.

2.Correct problems found in step #1. If burner does not fire, press reset button on burner primary control only once. Repeated presses will deposit oil in combustion chamber.

Burner must never be fired when oil is in combustion chamber. Immedi- ately call qualified service technician.

3.If burner still does not fire, call qualified service technician.

Steam Relief Valve (on back of boiler)

Pressure Control

n

Pressure Gauge	n
n

n

Tankless Heater

Control

Located in tankless heater plate (sizes 3-5)

or in tapping in back section (sizes 6-9)

		n	n	Probe-Type
n	n			Low Water
				Cutoff

Gauge Glass

Burner

Disconnect

Plug

6

n	n
	n

SGO Boiler with Probe-Type Low Water Cutoff (See Page 5 for Float-Type Low Water Cutoff)

Figure 2

Service Switch

on Boiler

Reset Button on Burner Primary Control

Burner Primary

Control

Part No. 550-141-830/1202