layer in the burner will absorb water and this will interfere
b. Protect the heater with an overhead shelter whenever
with the operation of the heater.
c. Do not expose the burner to moisture. The asbestos
Section VII. OPERATOR'S AND ORGANIZATIONAL MAINTENANCE
4-17. Organizational Repair Parts
4-16. Special Tools and Equipment
Organizational maintenance repair parts are listed after
No special tools or equipment are required by the operator
or organizational maintenance personnel for maintenance
of the immersion heater.
Section VIII. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
in serious damage or failure. The necessary preventive
To insure that the immersion heater is ready for operation
maintenance checks and srvices to be performed are listed
at all times, it must be inspected systematically so that
defects may be discovered and corrected before they result
Section IX. OPERATOR'S MAINTENANCE
(2) Use fine sandpaper to rub off rust spots.
(3) Remove scale using Scale Removing Compound
operator's maintenance of the immersion heater. The
(a) Set up the heater in a 32-gallon (121.12-liter)
maintenance includes a visual check of the assembly.
can and fill the can with water. Add 5 cups (1.18 liters) of
compound and stir until dissolved.
(b) Fire up the heater and heat the solution for 30
minutes. Check the color of the solution and look for
(1) Refer to figure 4-6 and inspect heater body for
remaining scale. If the solution is yellow and there is still
dents or broken welds. Report broken welds to direct sup-
scale on the heater, add 5 more cups (1.18 liters) of com
pound and heat for another 30 minutes.
(2) Inspect stack partition for holes or broken welds.
Broken welds and holes in stack partition should be
(c) When the solution remains red or pink and the
scale is gone, turn off the heat and pour out the solution.
reported to direct support maintenance.
Rinse thoroughly with fresh water.
(1) Refer to figure 4-6 and clean dust and grease off