unit 18 TSSA
where can a three-way valve be used as a diverter - answer on the return line
what is the maximum allowable velocity of a fluid in a supply and return lines that are
less the 2 in. - answer4 ft.
under what circumstances may a draft hood be altered - answer no circumstances allow
the alteration
where must the combustion air opening be located - answer in the same room as the
draft hood
what is a dedicated water heater system used for - answer hydronic radiant heat
how should the heating output of an air handler be calculated - answer greater then 100
percent of the space heating loss of a building
temperature sensors are set respond to temperatures of what input - answer-supply and
return fluid
-mixed fluid
-indoor and outdoor air
-all of the above
why should a fitting NOT bd directly soldered onto the cold water inlet of a water heater
- answerthe plastic dip tube inside the cold water inlet could melt
what is the maximum allowable clearance to combustibles from an under-fired storage
type gas-fired water heater - answerclause 7.27.4
2 inches
how is lime formed inside a water heater - answeras the heats up it becomes less
dense and the heavy minerals settle out and begin coating the bottom of the tank
when should the final settings on a bypass valve be done - answerwhen the system is
operating at normal temperature and low flow values
what device is installed in the flue of a residential water heater to improve heat transfer
to the water - answera spiral baffle
what is a common type of automatic control that can be used in an instantaneous water
heaters - answer-water pressure -drop sensor
-water flow sensor
where can a three-way valve be used as a diverter - answer on the return line
what is the maximum allowable velocity of a fluid in a supply and return lines that are
less the 2 in. - answer4 ft.
under what circumstances may a draft hood be altered - answer no circumstances allow
the alteration
where must the combustion air opening be located - answer in the same room as the
draft hood
what is a dedicated water heater system used for - answer hydronic radiant heat
how should the heating output of an air handler be calculated - answer greater then 100
percent of the space heating loss of a building
temperature sensors are set respond to temperatures of what input - answer-supply and
return fluid
-mixed fluid
-indoor and outdoor air
-all of the above
why should a fitting NOT bd directly soldered onto the cold water inlet of a water heater
- answerthe plastic dip tube inside the cold water inlet could melt
what is the maximum allowable clearance to combustibles from an under-fired storage
type gas-fired water heater - answerclause 7.27.4
2 inches
how is lime formed inside a water heater - answeras the heats up it becomes less
dense and the heavy minerals settle out and begin coating the bottom of the tank
when should the final settings on a bypass valve be done - answerwhen the system is
operating at normal temperature and low flow values
what device is installed in the flue of a residential water heater to improve heat transfer
to the water - answera spiral baffle
what is a common type of automatic control that can be used in an instantaneous water
heaters - answer-water pressure -drop sensor
-water flow sensor
