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"WARNING: If the area in which the heater may be operated is smaller than that
defined as an unconfined space or if the building is of unusually tight construction, provide
adequate combustion and ventilation air by one of the methods described in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for Combustion and Ventilation, or applicable local
codes."
"The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space
whose volume is less than 50 ft3 per 1000 Btu/hr (4.8 m3 per kw) of the aggregate input
rating of all appliances installed in that space and an unconfined space as a space whose volume
is not less than 50 ft3 per 1000 Btu/hr (4.8 m3 per kw) of the aggregate input rating of all
appliances installed in that space. Rooms communicating directly with the space in which the
appliances are installed, through openings not furnished with doors, are considered a part of the
unconfined space." For example, add the BTU for each gas appliance in the room and then
compare the size of the room to see if it will accept 1,000 BTU for each 50 cubic feet. The cubic
feet in the room can be calculated by multiplying the length by the width times the height of the
ceiling. If the room has 8-foot ceilings and is 11 feet by 15 feet, it would have 1,320 cubic feet
(8x11x15). You can now multiply by 1,000 and divide this cubic volume by 50 cubic feet/1,000
BTU and the result (1,320x1,000÷50) of 26,400 represents the accumulated BTU capacity for
this room size. If the result is greater than the accumulated BTU of all the appliances in the room,
then the room is an unconfined space and qualifies for installation of the unvented heater. If the
result is less than the accumulated BTU of all appliances in the room, then the room is a confined
space and the unvented heater should not be installed in this room.
The formula for this calculation: BTU/HT = L x W x H x 1,000
If the room has a door to an adjoining room, use only the dimensions to the room where the
heater will be located. If the room has an open area between two rooms the total length, width
and height can be used in your calculations.
IMPORTANT! The logs MUST be placed exactly as shown in the diagram. If there is any
evidence of carbon or blackening on the logs they may be incorrectly placed in the unit.
NOTE (Models manufactured prior to 3/00) – For removal of the screen you must:
1)
Lift up on the screen.
2)
Push the screen toward the logs,
past the clips.
3)
Push the screen down to the bottom
of the firebox.
4)
Pull the top of the screen forward
and up.
For models manufactured 3/00 and later, simply
remove the four Phillips Head screws to take out
the screen. Do not over-tighten the screws when
reinstalling.
WARNING:
ANY CHANGE TO THIS HEATER OR ITS CONTROLS CAN BE DANGEROUS.
WARNING: Failure to position the parts in accordance with this diagram or failure to use
MODIFICATIONS TO THIS APPLIANCE MAY CAUSE SERIOUS INJURY OR DEATH.
only parts specifically approved with this heater may result in property damage or
ANY CHANGES WILL VOID THE WARRANTY.
FOR YOUR SAFETY - READ BEFORE OPERATING
MODIFICATIONS TO THIS APPLIANCE MAY CAUSE SERIOUS INJURY OR
DEATH. ANY CHANGE WILL VOID THE WARRANTY.
WARNING: ANY CHANGE TO THIS HEATER OF ITS CONTROLS CAN BE
50
LOG ASSEMBLY
personal injury.
DANGEROUS.
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