What is an other name for air water systems?
Hydronic systems
Where are hydronic systems usually found?
In multi-storey commercial buildings
Give me 5 examples of small air handling systems?
Portable air conditioners, Window air conditioners, Ductless split air conditioners, and centrial air condtioners in furnaces.
What does AHU mean?
Air handling unit
What are portable air conditioners?
They are air conditioners that can be wheeled from room to room.
Why does portable air conditioners need access to outdoor air?
They need for the removal of condenser heat.
All portable units extract moisture from the room? (true or false)
True
What’s an another name for centrifugal fan?
squireel cage fans or blowers
What are the main components of a Centrifugal Fan?
The Housing, Shafts, bearings and the Centrigual wheel.
What are the most common centrifugal wheels?
Forward curved, Backward inclined and Radial
What are forward curved fans?
They are common in small air conditioning systems that require high airflow volumes at static pressures up to 4” of water gauge
What are backward incline fans?
They are fans that deliver air volume flow rates in the mid to high range and at static pressures up to 20” of water gauge
What are the three types of backward inclined fans?
Flat blade,radial tip and curved airfoil.
The fan that has its blades mounted on the wheel perpendicular to the shaft, what’s that fan called?
Radial fan
Which type of fan is parallel to the shaft driving the blades in a circular motion?
Propeller fans or axial fans
Which belts are for heavy industrial duty?
A and B belts
Which belts are for light duty?
4L and 5L
Make up air units that heat air are either what type of fired?
direct-fired or indirect-fired
Isolation AHU is achieved by what?
Rubberized blocks under the AHU, Springs under the AHU, Springs used to suspend vibrating components or Canva connectors between ductwork and the AHU
What are the two types of fans used to move air?
Centrigugal fans and Propeller fans
What are the components that make up a Centrigual fan?
Housing, shaft, bearing, and the centrifugal wheel
Which fans are used in ducts for exhausting air?
Axial fans with propellers.
What are the two reasons why bel tensioning is important?
It prevent noises from belt slippage or belt sections flapping together and it provides and maintains maximum energy transfer from the motor to the fan.
What is a sheave
Its a wheel used to transfer mechanical energy
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140102d part 220
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Hvac Lecture Oct 86
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140102d part 311
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140102e34
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140102E ilm Questions25
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Describ Air Handling Components And Thier Functions46
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Apply Natural Gas and Propane Legislation to Piping and Fitting Installation Scenarios (Quiz)33
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Outcome #6 - Describe Properties of Natural Gas and Propane and Perform Combustion Calculations23
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140102K22
