A.O. Smith HW 610 warranty Boilers and Secondary Circulator are Controlled by

NOTE:

1.Building temperature controls supply electric power to building circulator.

2.Main flow switch proves main water flow before energizing sequencing and resetting controls.

3.Outdoor thermostat required if building controls do not provide automatic shutdown of reset controls during warm weather. Boilers and Secondary Circulator are Controlled by

• Dual Bulb, Dual Switch Controller

Staging and Outdoor Reset of Main Water Temperature

CONTROL APPLICATION DIAGRAM - TWO BOILER LINEAR-TEMP® INSTALLATION WITH TWO CIRCULATORS

FIGURE 18.

NOTE:		Boilers and Secondary Circulator are Controlled by
1.	Building temperature controls supply electric power to building circulator.
2.	Main flow switch proves main water flow before energizing	•	One Dual Bulb, Dual Switch Mechanical Controller and
	sequencing and resetting controls.	•	One Dual Bulb, single Switch Mechanical Controller

3.Outdoor thermostat required if building controls do not provide

automatic shutdown of reset controls during warm weather. Sequencing and Outdoor Reset of Main Water Temperature.

CONTROL APPLICATION DIAGRAM - THREE BOILER LINEAR-TEMP® INSTALLATION WITH THREE CIRCULATORS

FIGURE 19.

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