TM 9-4540-202-12&P
Table 4-1. Organizational Preventive Maintenance Checks and Services - Continued
Procedure
For Readiness Reporting,
Item
Item To Be
Check for and have repaired,
Equipment Is
No.
Inspected
replaced, adjusted as necessary
Not Ready/Available if:
a. Set up the heater in a 32 gallon
(121.12 liter) can and fill the can with
water. Add 5 cups (1.18 liters) of
Scale Removing Compound (Item
14, Appendix E) and stir until
dissolved.
b. Fire up the heater and heat the solu-
tion for 30 minutes. Check the color
of the solution and look for remaining
scale. If the solution is yellow and
there's still scale on the heater, add 5
more cups (1.18 liters) of compound
and heat for another 30 minutes.
c. When the solution remains red or
pink and the scale is gone, turn off the
heat and pour out the solution. Rinse
thoroughly with fresh water.
2
COMBUSTION
Inspect for any broken welds and holes
Broken welds that would permit
CHAMBER AND
and for the presence of any contami-
water leakage into combustion
HEATER BODY
nants.
chamber.
a. An opening of any size or shape in
either flue partition or the baffle in the
base of the heater should not be
considered a safety hazard. No
adverse condition will occur if an
opening is present. Depending on the
size and location of the opening, a
decrease in output of the heater may
result in excessive water heating
time. This would be considered ineffi-
cient for a unit's designated mission.
b. An opening in the baffle greater than
Opening or hole larger than 1/2
1/2 inch in diameter is a sign that the
inch in diameter in flue partition or
metal has deteriorated beyond repair
baffle.
and the heater should be turned in to
the authorized activity for disposal.
c. Inspection can be made by inserting
a light down the flue tube and
checking the adjacent side for leaks
or holes.
4-3
