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what draft moves flue gas through the heat exchange -
ANSWER-mechanical
furnace designed with the blower motor under the heat
exchange is the -
ANSWER-
upflow
a gas furnace is installed in a garage, the burners are -
ANSWER-18 inches
above
floor
a carryover on a gas burner.. - ANSWER-provides smooth
lighting of all burners
100% shutoff means - ANSWER-gas to the pilot and manifold
are shut off
, a limit switch deenergizes the - ANSWER-gas valve if it
overheats
what checks the pressure of a furnace - ANSWER-manometer
burning 1ft of natural gas produces - ANSWER-900-1100 BTU
efficiency ratings of gas burning appliances is
determined with - ANSWER-
AFUE
a furnace is converted from natural gas, there is soot, why -
ANSWER-low gas
pressure
btu/hr / 1.08 x td calculates - ANSWER-CFM
btu is the amount of heat requires to raise the temp of
1lb of water... -
ANSWER-1 degree
fahrenheit
heating thermostates have anticipators to - ANSWER-reduce
temp swing
the lowest concentration of fuel that ignites is - ANSWER-LEL
the volts of a hot surface igniter is - ANSWER-120 volts