Underwriters Laboratory (UL)

National LP Gas Association (NLPGA)

Safety

WARNING! Detroit Radiant Products Company cannot anticipate every use which may be made of their heaters. Check with your local fire safety authority if you have questions about local regulations.

WARNING! These heaters are not explosion-proof. Where there is the possibility of exposure to flammable vapors, consult the local fire marshal, the fire insurance carrier and other authorities for approval of the proposed installation.

WARNING!  NOT FOR RESIDENTIAL USE!  (Unless otherwise noted)  Do not use in the home, sleeping quarters, attached garages, etc.

CAUTION!  Check the AGA/CGA (CSA) rating label on the heater to verify the proper gas to be used. Check the other labels on the heater to verify proper mounting and clearance to combustibles. The installation of this heater must conform with local building codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1 (NFPA 554, latest edition). Applications in Canada must conform to CAN/CGA B149.1and .2 codes and Canadian Electrical Code C22.1 (latest edition).

WARNING!  Failure to comply with the stated clearances to combustible could result in personal injury, death and/or property damage.

WARNING!  This heater should be installed so that the minimum clearances to combustibles, as marked on the heater, will be maintained from vehicles parked below. If vehicle lifts are present, ensure that these clearances will be maintained from the highest raised vehicle. For the safe installation of this unit, consult the clearance to combustibles chart for your series of heater. It contains clearances that must be maintained.

WARNING! In locations used for the storage of combustible materials, signs must be posted to specify the maximum permissible stacking height to maintain the required clearances from the heater to the combustibles.  Signs must either be posted adjacent to the heater thermostats or in the absence of such thermostats in a conspicuous location.

Determination of Clearances to Combustibles. Clearances to combustible distances are determined to be the point (usually measured in inches) at which a black surface is raised 90 degrees hotter than the room temperature.  

Highly absorbent black walls are placed around the heater’s exchanger at the hottest point. These walls are moved inward or outward until the standard temperature* of 90 degrees plus ambient (room temperature) is achieved. *ANSI Z83.6.  

Once this temperature is achieved, the distance from the heater to these outer walls are then measured and recorded as the minimum clearance to combustibles.  

This process is repeated at a distance 20 feet downstream from the heater to gather reduced clearance to combustibles data.