Flashcards in Boiler, Low Temperature Hot Water Piping And Trim Deck (23)
What best describes the amount of heat energy required to raise the temperature of a pound of water through 1*f
Btu- British Thermal Unit
Which boiler is limited to a maximum working pressure of 30psig (Water) or 15 psig (Steam)
High Mass cast iron
Within a hot water boiler, which device indicates pressure and temperature ?
The device used to shutdown the fuel to the burner when the water level in the boiler drops below its operating level is called a/an?
Float operated low water cut off or a/an probe type water cut off
A globe valve pattern device that is used t reduce incoming water pressure to the minimum desired boiler system pressure and that also serves as an automatic water feeder is know as a:
Pressure reducing valve/ PRV
What are the maximum operating temperatures and pressures of a low temperature high mass cast iron hot water boiler
120*c (250*f),207kPa (30psig)
What is the maximum operating temperature and pressure of a low-temperature low-mass copper or steel tube hot water boiler
120*c (250*f), 1100kPa (160psig)
Low-temperature low-pressure hot water boilers are usually rated in?
Net Btu/hr or EDR
The amount of heat energy available at the heat transfer units is defined as:
The net rating
A hot water EDR has a Btu value of:
The amount of heat energy consumed by the boiler is defined as:
The input rating
The purpose of a balancing valve is to:
Adjust flow rates to each heat transfer unit
The purpose of a wild-loop is to:
Prevent the pump from deadheading
The type of radiator valve that should be installed to prevent unauthorized use is a:
Lock shield radiator valve
The purpose of a zone valve is to:
Provide control of heating emission
The part of a circulator that transfers energy to the water is:
What is the function of a circulator in a hot water heating system?
Moves the water within the system
The 2 variables you will find on a pump curve are?
Head and flow
The best place for the circulator in a hot water heating system is:
Downstream of the compression tank
Finned tubed baseboard is rated by what method?
Btu per foot hour based upon supply water temperature, flow rate and entrance air temperature of 65*f
How do you control the heat output of finned tube baseboard?
By adjusting the damper
What is the length of fin that would be required for a room with a heat loss of 8000 Btu/hr if the f'in had an output rating of 45Btu/ft/hr