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18 Cards in this Set
- Front
- Back
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Hydronics circulate heated water to devices known as? |
Terminals |
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Boilers commonly fire at what degree? |
180F |
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Boilers can run between what temps? |
90F and 200F |
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What temperature does flue gas condense at? |
130F |
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Heat exchangers are made from what types of metal? |
Cast iron Steel Copper |
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Boilers assemblies are classified one of two ways- what are they? |
Dry and wet base |
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Expansion tanks are classified 1 of two ways, what are they? |
Compression and Diaphragm |
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Diapraghm tanks are filled with typically how much psi? |
12 psi |
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Circ pumps are typically what type of displacement |
Non positive displacement Centrifugal |
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Broze of stainless steel fittings are used to mitigate? |
Rusting / corrossion |
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Pipe built upward is known as? |
Feet of head |
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Maximum point a pump can move water is known as? |
Cut off point |
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2.309 ft of water column = how much psi? |
1 |
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1 psi = how many inches of water column? |
27.7 |
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The difference between pump inlet and outlet pressures is known as |
Pump head pressure |
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How does gpm affect amperage of a pump? |
As Gpm is reduced Amperage is also reduced |
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Point of the system where pressure will never change no matter what the system is doing is known as |
Point of no pressure change |
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The point of no pressure change is good for two reasons? |
- A focal point for installing main components - a focal point for diagnosing boilers |
