A.O. Smith - page 24

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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® INSTALLA TION WITH TWO CIRCULA TORS
FIGURE 15
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.
4. Should motor load exceed 7.5
AMPS,
use relays or motor starters.
5. In absence of main flow switch
and low water cutoff, jumper
"A" and "B" together.
CONTROL APPLICATION DIAGRAM - EIGHT BOILER LINEAR-TEMP® INST ALLA TION WITH INDIVIDUAL CIRCULAT ORS
FIGURE 16
Boilers and Secondary Circulator areControlled by Dual Bulb, Dual Switch Controller Staging and Outdoor Reset of Main Water Temperature