Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning are similar to the flu with headaches, dizziness and/or nausea. If you have these signs, obtain fresh air im- mediately. Have the Unvented Gas Heater serviced as it may not be operating correctly.
•Due to high temperatures, the firebox should be located out of traffic and away from furniture and draperies.
•Children and adults should be alerted to the hazard of high surface temperature and should stay away to avoid burns or clothing ignition.
•Young children should be carefully super- vised when they are in the same room with the heater.
•Do not place clothing or other flammable material on or near the heater.
•Any safety screen or guard removed for servicing the firebox must be replaced and/or closed prior to operating the heater.
•Installation and repair should be done by a qualified service person. The heater should be inspected before use and at least annually by a professional service person. More frequent cleaning may be required due to excessive lint from carpeting, bedding material, etc. It is important that control compartments, burners and circulating air passageways of the heater be kept clean.
•Allow the heater to cool before servicing. Always shut off any electricity or gas to the heater while performing service work.
•Do not install the firebox in a sleeping room or bathroom.
•The appliance and its individual
•The heater must be isolated from the gas supply piping system by closing its individual manual
•Keep heater area clear and free from com- bustible materials, gasoline and other flam- mable vapors and liquids.
•Do not use this heater if any part has been under water. Immediately call a qualified ser- vice technician to inspect the heater and to replace any part of the control system and any gas control which has been under water.
•Ensure that the heater is clean when operat- ing. Excessive dust accumulation on the burner and logs will increase the amount of carbon monoxide formation and could lead to carbon monoxide poisoning and death.
CODES
Adhere to all local codes or in their absence the latest edition of The National Fuel Gas Code ANSI Z223.1 or NFPA54 which can be obtained from The American National Standards Insti- tute, Inc. (1430 Broadway, New York, NY, 10018) or National Fire Protection Association, Inc. (Batterymarch Park, Quincy, MA, 02269).
COMBUSTION AND VENTILATION AIR
Heaters installed in these appliances shall not be installed in a confined space. Heaters installed in these appliances may be located in unusually tight construction provided the space is unconfined, or if confined, is pro- vided with two permanent openings commu- nicating directly with an additional room(s) of sufficient volume so that the combined volume of all connected spaces meets the criteria for an unconfined space, (National Fuel Gas Code ANSI Z223.1 1992, Section 5.3). Generally 50 ft 3 per 1,000 BTU input of all operating appliances in the space.
The National Fuel Gas Code defines a confined space as a space whose volume is less than 50 ft 3 per 1,000 BTU/Hr (4.8 m3 per kw) of the aggregate input rating of all appliances in- stalled in that space and an unconfined space as a space whose volume is not less than 50 ft 3 per 1,000 BTU/Hr (4.8 m3 per kw) of the aggre- gate 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.
Unusually tight construction is defined as con- struction where:
a. wall and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating or one perm or less with openings gasketed or sealed, and
b. weather stripping has been added on oper- able windows and doors, and
c. caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall- ceiling joints, between wall panels, at penetra- tions for plumbing, electrical, and gas lines, and at other openings.
Use the following equations to determine if you have a confined or unconfined space.
1.Determine the volume of space — ft 3.
Length x Width x Height = _____ ft 3
(Include adjoining rooms with doorless pas- sageways or ventilation grills between rooms.)
Example: 24' (L) x 16' (W) x 8' (H) = 3072 ft 3
2.Divide the volume of space by 50 ft 3 to determine the maximum BTU/Hr the space can support.
______ (volume of space – ft 3)/ 50 ft 3 = (Maximum BTU/Hr the space can support)
Example: 3072 ft 3 / 50 ft 3 = 61.44
or 61,440 BTU/Hr the space can support.
3.Add the BTU/Hr of all the fuel burning appli- ances in the space.
_______ | BTU/Hr | |
Gas appliance #1* | _______ | BTU/Hr |
Gas appliance #2 | + _______ | BTU/Hr |
Total = _______ | BTU/Hr | |
Example: |
|
|
26,000 | BTU/Hr | |
Gas appliance #1 | 40,000 | BTU/Hr |
(water heater) |
|
|
Total = 66,000 | BTU/Hr | |
*Do not include
4. Compare the maximum BTU/Hr the space can support with the actual amount of BTU/ Hr used.
_________ BTU/Hr
(max. the space can support)
_________ BTU/Hr
(actual amount of BTU/Hr used)
Example:
61,440 BTU/Hr
(max. the space can support)
66,000 BTU/Hr
(actual amount of BTU/Hr used)
The space in the above example is a confined space because the actual BTU/Hr used is more than the maximum BTU/Hr the space can sup- port. You must provide additional fresh air.
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