Unit 33 review

The flashcards below were created by user salvatorefricano on FreezingBlue Flashcards.

A terminal unit in a hydronic system may be________unit

Finned tube baseboard
boilers that have efficiencies over 90% are commonly referred to as

condensing boilers
in a wet base boiler, the water being heated is located

both above and below the combustion area
All of the following are characteristics of a cast iron boiler are
- they are classified as high-mass
- they have long run times and off times
- they typically contain between 15 and 30 gallons
what are copper water boilers considered

low mass boilers
what does a limit control do

shuts the heat source down if the temp gets to hot
the pressure relief valve does what

is set to relieve pressure in the boiler below the maximum design pressure of the boiler
the expansion tank provides a means of removing the air from the system as well as

provides extra space for the water exspansion and contraction with water temp changes
the parts of the centrifugal pump that spins and forces water through the system is the

impeller
are centrifugal pumps positive displacement pumps

no
where should the circulator be installed in the system

point of no pressure change
the air separator in a hydronic system does what

seperates air from the water line
what does the air vent in a hydronic system do

removes air from the water line
where is the water pressure reducing valve located in a hot water hydronic system

between the main water supply and the point of no pressure change
what are zone valves controlled by

thermostats
a flow control valve is also called_______valve

check vave
in a series loop hydronic system the heat piping system heats

all of the heated water flow through all of the terminas
in a primary-secondary pumping arrangement, the largest circulator pump will be located

in the primary loop

Author:	salvatorefricano
ID:	300918
Card Set:	Unit 33 review
Updated:	2015-04-19 13:46:48
Tags:	boilers
Folders:
Description:	Boilers
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