A disadvantage of a central forced air electric furnance is?
there is no zone control for individual rooms
Three common controls used in central electric heat applications are thermostats, contactors (or relays), and ?
The low voltage thermostat is used for central electric heat because it is compact, it is responsive and it is?
safe, easy to install and troubleshoot.
The heat anticipator setting is determined by?
adding all the current draws in the 24volt circuit that passes through the thermostat control bulb and heat anticipator.
The sequencer uses ______________(high or low) voltage control power to stop and start the electric heaters?
State the formula used for detemining the cubic feet per minute (cfm) airflow across the furnace heating elements?
cfm=Qs/1.08 x temperature difference
Central forced-air electric furnances frequently use ______________ to start and stop multiple heating circuits.
A sequencer often utilizers a ______________ to initiate its operation.
bimetal heat motor or bimetal snap disc
The componet located in the thermostat that shuts the electric furnance down prematurely so that the space will not overheat is ____________.
The disadvantage in using a contactor to open and close the circuit to the electric heating elements is?
1.) A large current draw when the conteactor coil is energized
2.) heating elements all starting at the same time unless separate time delays were used.
A limit switch or control is used to?
Open the circuit to the heating elements if the furnance overheats.