Ashpit, outdoor intakes, glass doors, circulators, gas ignitors Flashcards
(15 cards)
The function of an ashpit is:
Collect ashes so that they can easily be removed.
List five common ashpit problems.
- Cleanout door missing
- Cleanout door too close to combustibles
- Floor below cleanout door
- Wood forms not removed
- Ash dump (ashpit cover) missing
How far should combustibles be from an ashpit cleanout door?
Minimum 6 inches from door
List two reasons why outdoor combustion air for fireplaces may be a good idea.
- Makes fireplaces more efficient
- Modern tighter construction made it harder to supply air to fireplaces
Give one reason outdoor combustion air for fireplaces may be a bad idea.
Combustion products may flow backwards through the combustion air duct from the fireplace.
List two reasons you may want to insulate the outside combustion air duct.
- Prevents condensation on the outside of the duct
- Helps shield combustible materials from the heat that can travel
through the duct
What is the minimum combustible clearance requirement for combustion air inlet ducts?
2 inches for at least the first 3 feet of duct measured from the firebox.
Glass doors are designed to replace fireplace dampers.
False
List five common glass door problems.
- Cracked or broken glass
- Frame or door rusted
- Frame or door warped
- Inoperative
- Inappropriate installation
Describe in one sentence the function of heat circulators.
improve the efficiency of fireplaces by allowing cool room air to pass over the warm firebox and discharge the warmed air back into the room.
List two common heat circulator problems.
- Fan inoperative
- Obstructed intakes or outlets
Heat circulator systems always require a fan that is thermostatically controlled.
False
Most gas igniters use pilot lights.
False
Most gas igniters use manual gas valves.
True
List six gas igniter problems.
- Piping obstructed
- Piping rusted
- Inadequate seal at firebox wall or floor
- Inadequate combustible clearance
- Gas leak
- Missing insulation or conduit for pipe
