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Académie
HVAC
NATE Hydronics Gas Service Specialty
Circulator Pump Service
Vérification des connaissances
Circulator Pump Service
Vérification des connaissances
Vérification des connaissances
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In a 3-wire zone valve system, what condition must be met before the circulator pump and boiler are energized?
A
The boiler aquastat must confirm the water has reached operating temperature
B
System pressure must rise above the expansion tank pre-charge setting
C
The zone valve must reach the full-open position and the end switch must close
D
The thermostat must send a second confirmation signal after the initial call
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