TM 9-2540-205-24&P
Section IV. DIRECT SUPPORT AND GENERAL SUPPORT TEST PROCEDURES
Explanation of Columns . ...........3-193
Test Procedures-Espar Heaters .3-199
Introduction . . . . . . . . . . . . . . . . . . . . .. 3-192
Test Procedures-Stewart Warner
Required Equipment for Testing
and Hupp Heaters . . . . . . . . . . . . 3-193
Heaters . . . . . . . . . . . . . . . . . . . . . ....3-192
INTRODUCTION
Personnel heaters should be fully tested to make sure they work properly after servicing. Perform all steps in
the test procedure, even if repairs were made to only one part. This way you will be sure the whole heater is
working properly.
NOTE
Overheat switches should only be tested after being replaced or they are believed to
be defective.
REQUIRED EQUIPMENT FOR TESTING HEATERS
The following items will be required to test heaters:
1. Heater test stand model VHTS heat and -89102. See TM 9-4910-7551-13&P.
NOTE
When testing the Stewart-Warner 10560M24B1 model heater, the 24-volt dc power
source must be filtered to 5 percent ripple maximum.
2. A power source (either a power supply or batteries) capable of supplying 24 Vdc. at a
current of at least 20 amps.
3. An ammeter (0-25 amps minimum) for measuring supply current. This can be part of the
power supply or a separate meter.
4. A supply of fuel delivered to the heater at a pressure of 3 to 15 psi (20.7 to 103.4 kPa).
5. A flexible hose for piping exhaust gases outside when testing heaters inside.
WARNING
Never operate heater inside without venting the exhaust out of the test area.
Heaters generate carbon monoxide gas. Injury or death to personnel could
result.
6. A timer or wristwatch with second hand for timing heater functions.
NOTE
ltem 7 is mandatoryfor testing the overheat switch. Do not attempt the overheat test
without the proper ductwork.
3-192
