Burnham Series 5B Installation, Operating And Service Instructions page 58

Burnham series 5b gas-fired boiler

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SecTiON iV - OPeRATiON (continued)

When operating control (A) calls for heat, it energizes main gas valves (B), starting burner operation.

The burners will operate until operating control (A) is satisfied. The high limit control (C), will stop burner

operation in case of excessive steam pressure (steam boiler) or excessive boiler water temperature (water boiler).

Low water cut-off (D) will stop burner operation if the water level in boiler drops below the lowest safe level.

The pilot safety switch (E), connected to main gas valve (B), prevents operation of the main burners in case the

pilot flame becomes extinguished. Pilot safety switch (E) provide for 100% shut-off of gas supply.

fiG. 46

wirinG diaGram - 5006b Thru 5014b secT. boilers

Thermocouple conTrol sysTem

canada only

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