Leakage may present a fire and/or health hazard. No leakage of any type is permitted
within the heater. No leakage of any type is permitted within the area or compartment
Heater operation is allowed if:
Class I or Class II leaks occur in fuel supply lines external to the heater and the area or compartment
And, such leakage does not present a fire or health hazard.
Class III leaks shall be reported immediately to your supervisor.
a. CLASS I-Slight seepage of fuel, but not great enough to form a drop. Indicated by slight wetness or discoloration.
b. CLASS II-Seepage of fuel great enough to form drops but not great enough to cause drops to drip from the item
CLASS III-Leakage of fuel great enough to form drops that fall from the item being checked.
2-7. PMCS TABLE.
Table 2-3. Operator Preventive Maintenance Checks and Services for Heater Model UH48-E
If the equipment must be kept in continuous operation, do only the procedures that can
be done without disturbing operation. Make complete checks and services when the
equipment is shut down.
Not Fully Mission
Check fuel supply and that fuel
Fuel is not available.
supply valve is open.
Check that power cable and
thermostat connector are fully
Connect properly or notify