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18 Cards in this Set
- Front
- Back
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what is the greatest advantage of hydronic heating over any other system? |
multiple zoning |
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which floor covering has the greatest R Value? |
carpet and underlay |
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what can affect a way a house in zoned? |
north and south exposures |
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which three factors must be known in order to properly size tubing for an application? |
GPM Velocity length of circuit |
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what two factors must you know in order to determine floor surface temperature? |
btus per square foot and room temperature |
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when installing tubing in a radient floor heating system the water temperature at the beginning of the circuit is the highest. which area of the room should the beginning of the circuit be installed? |
in the areas with the greatest heat loss |
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double wall serpentine is best suited to which one of the following applications? |
two adjacent walls that are exposed to the outside |
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is insulation required below a poured in concrete application? |
code requires installation below poured in concrete applications |
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what is the minimum pressure test on tubing in radient floor heating? |
the greater of either 60 psi or 1.5 times the working pressure for a period of 1 hr with no pressure drop |
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when are supplemental heating units installed in radient floor heating systems? |
when the radient floor goes not keep up with the heat load |
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what two factors are required to calculate header size? |
GPM and Velocity |
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why are zone valves required in a system? |
to stop and start flow in the system as required |
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what is required when piping a low mass boiler that is flow sensitive? |
a bypass pump between the supply and return boiler piping |
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what is required when a conventional boiler is installed in a low temperature radient floor heating system? |
a mixing valve |
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what function does a 3 way or 4 way valve perform in a hydronic heating system? |
mixes water from the heat source and the system return in order to temper system water supply |
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what must be installed with a three way or four way mixing valve in order to protect the heat source and the radient floor system? |
a drive motor and controller |
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what should be installed to separate the boiler water and the system water when glycol is added to the water in a radient floor heating system? |
a plate heat exchanger |
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what is required when a variable speed injection pump is installed in a two temperature system? |
a controller for the pump |
