Item
No.
6
Table 2-2. Operator Preventive Maintenance Checks and Services-Continued
B—Before Operation
D—During Operation
A—After Operation
Interval
B
D
•
A
ITEM TO BE INSPECTED
PROCEDURE
HEATER OPERATION
Surfaces of and near heat exchanger and exhaust system can
become hot enough to cause severe burns if touched.
Do not operate heater in enclosure unless exhaust gases are
piped outside. Exhaust gases contain carbon monoxide, a
colorless, odorless, deadly poisonous gas. Failure to provide
proper elimination of the exhaust can cause severe illness or
death.
Monitor operation of unit using senses of sight, hearing, touch, and
smell:
a.
b.
c.
d.
e.
Look for signs of excessive vibration, fuel leaks, exhaust leaks,
arcing, overheating of heater and/or electrical components, and
incomplete combustion.
Listen for abnormal noise that may indicate possible failures in
motor bearings, fans, fuel feed systems, combustion chamber,
and heat exchanger.
Touch cool portions of heater to determine vibration level.
Note unusual smells that may indicate overheating, exhaust
leaks, heat exchanger leaks, fuel leaks, incomplete combustion,
and faulty electrical circuits.
If inspection indicates combustion problem, open front access
door (1) and adjust fuel needle (2) as follows:
Equipment is
Not Ready/
Available If:
Excessive vibra-
ion, fuel leak-
ing, exhaust
leaking, defects
in electrical
system, burned
out bearing,
damaged fan,
leaking heat
exchanger.
Combustion
problems con-
tinue after fuel
needle adjusted
2-2.4
Change 1
TM 5-4520-253-13
