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2.0
Safety
•
Clearance to Combustibles
Clearance to Combustibles
Clearance to Combustibles is defined as the minimum distance that must exist between the tube surface,
or reflector, and any combustible items (see Figure 2.1). It also pertains to the distance that must be
maintained from moving objects around the tube heater. When installing the tube heater system, clearances
to combustibles for the model tube heater and configuration must be maintained. Refer to Chart 2.1 to
determine the required distances for your model.
Hazards:
For maximum safety the building must be evaluated for hazards before installing the heating system.
Examples of hazards include, but are not limited to:
• Gas and electrical lines
• Combustible and explosive materials
• Chemical storage areas
• Areas of high chemical fume concentrations
• Provisions for accessibility to the heater
• Adequate clearances around air openings
• Combustion and ventilating air supply
If you are unsure of the potential hazards, consult your local fire Marshall, fire insurance carrier or other
qualified authorities on the installation of gas fired tube heaters for approval of the proposed installation.
A critical safety factor to consider before installation is the clearances to combustibles. Clearance to
combustibles is defined as the minimum distance you must have between the tube surface, or reflector,
and the combustible item . Considerations must also be made for moving objects around the tube heater.
The following is a partial list of items to maintain clearances from:
Combustible items:
• Wood
• Paint
• Parked vehicles
• Paper
• Gasoline
• Fabric
• Storage racks
• Chemicals
IMPORTANT: Fire sprinkler heads must be located at an appropriate distance from the heater to avoid an
inadvertent discharge. This distance may exceed the published clearance to combustibles. Certain
applications may require the use of high temperature sprinkler heads or the relocation of the heaters.
Fire sprinkler systems containing propylene glycol, antifreeze or other potentially flammable substances
shall not to be used in conjunction with this heater without careful consideration for and avoidance of
inadvertent discharge hazards. For further information consult NFPA 13. Always observe applicable
provinces and local codes.
WARNING
!
Placement of explosive objects, flammable objects, liquids and vapors close to the
heater may result in explosion, fire, property damage, serious injury or death. Do not
store or use explosive objects, liquids and vapor in the vicinity of the heater.
CAUTION
!
• Vehicle parking areas
• Vehicles with lifts or cranes
• Storage areas with stacked materials
• Lights
• Sprinkler heads
• Overhead doors and tracks
• Dirty, contaminated environment
Moving Objects:
• Overhead doors
• Vehicle lifts
• Cranes
• Hoists
8
DES3
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