The following terms are defined in Chapter 2:
FURNACE CLASS A.
FURNACE CLASS B.
FURNACE CLASS C.
FURNACE CLASS D.
Valves for fuel supply lines shall be located within 6 feet (1829 mm) of the appliance served.
Exception: When approved and the valve is located in the same general area as the appliance served.
Safety data for Class A solvent atmosphere ovens shall be furnished on the manufacturer’s nameplate. The nameplate shall provide the following design data:
- The solvent used.
- The number of gallons (L) used per batch or per hour of solvent entering the oven.
- The required purge time.
- The oven operating temperature.
- The exhaust blower rating for the number of gallons (L) of solvent per hour or batch at the maximum operating temperature.
Exception: For low-oxygen ovens, the maximum allowable oxygen concentration shall be included in place of the exhaust blower ratings.