A.O. Smith HW 610 Boilers and Secondary Circulator are Controlled by, Main Water Temperature

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 - FOUR BOILER LINEAR-TEMP® INSTALLATION WITH TWO CIRCULATORS

FIGURE 20.

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