CSLB C-20 HVAC ContractorHeating SystemsEasy
A hydronic heating system uses a boiler to heat water, which is then circulated through baseboard radiators. What type of pump is typically used to move the heated water through the closed loop system?
- AA sump pump.
- BA condensate pump.
- CA well pump.
- DA circulator pump.
Show answer & explanationAnswer & explanation
Correct answer: D. A circulator pump.
Circulator pumps are specifically designed to move water through closed-loop heating and cooling systems, such as hydronic heating systems, overcoming system resistance to ensure proper flow to all heat emitters.
Why the other options are wrong
- A. Sump pumps are used to remove water from basements or sumps, typically for flood prevention, not for hydronic heating.
- B. Condensate pumps are used to remove condensate from high-efficiency furnaces or AC units, not to circulate heating water.
- C. Well pumps are used to draw water from a well for domestic use, not for closed-loop hydronic systems.
Circulator Pump Function
A circulator pump is a type of centrifugal pump used in hydronic systems to circulate water or other heat transfer fluids through a closed loop, ensuring heat distribution.
- Designed for closed-loop systems.
- Overcomes system resistance (friction).
- Essential for distributing heat from boiler to emitters.
Memory trick: To make the hot water flow, a circulator pump must go.