Sample interview questions: Can you discuss your knowledge of different pump types used in hydronic systems and their applications?
Sample answer:
- Centrifugal Pumps:
- Most common type used in hydronic systems
- Impeller rotates to create centrifugal force, moving water through the pump
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Applications: circulating hot water in baseboard heating systems, chilled water in air conditioning systems, and boiler feedwater systems
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Positive Displacement Pumps:
- Use mechanical action to move water in a specific volume with each cycle
- Types: piston pumps, diaphragm pumps, and gear pumps
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Applications: high-pressure applications, such as water supply systems, pressure boosting, and boiler feedwater systems
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Variable Speed Pumps:
- Speed can be adjusted to match system demand
- Benefits: energy savings, reduced noise, and improved comfort
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Applications: residential and commercial hydronic systems, including radiant floor heating systems
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Condenser Pumps:
- Specifically designed for condensate removal in HVAC systems
- Compact size and low noise operation
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Applications: condensing units, air handlers, and dehumidifiers
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Submersible Pumps:
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Source: https://hireabo.com/job/12_0_14/Hydronic%20Technician