TM-9-2540-207-14-P
HEATER, VEHICULAR COMPARTMENT, MODEL: A20
TECHNICAL MANUAL; OPERATOR, FIELD, AND SUSTAINMENT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2007
TM-9-2540-207-14-P - Page 3 of 288
TM 9-2540-207-14&P
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WARNING SUMMARY
Failure to follow these safety precautions could result in serious injury or death to personnel
and/or property damage.
Refer to FM 4-25.11 for first aid information.
WARNING
Carbon monoxide is a colorless, odorless gas, and if inhaled can be lethal.
Never operate a
heater indoors without venting the exhaust out of the test area or vehicle.
The heater consumes
oxygen and produces carbon monoxide gas, which is vented through the exhaust.
Adequate
exhaust ducting must be provided to avoid carbon monoxide leakage and poisoning of
personnel.
WARNING
Should the heater not start within three (3) consecutive attempts, refer to the Troubleshooting
guide in Section 6 of this manual.
DO NOT
try to start a flooded heater and
DO NOT
use
starting aids such as ether to assist in heater Start-Up, a fire hazard may occur which could
result in injury or death to personnel.
WARNING
DO NOT
place combustible materials within three (3) feet of the heater exhaust.
WARNING
DO NOT
smoke or allow open flame nearby while conducting maintenance work on the heater
as diesel fuel and its fumes can be explosive.
WARNING
If the heater has been running recently, the Ignitor, the Exhaust Port, and the Heat Exchanger
are hot enough to burn unprotected skin.
WARNING
Hearing can be PERMANENTLY DAMAGED if exposed to constant high noise levels of 85 dB
or greater.
Wear approved
hearing protection devices when working within two (2) feet of the
heater inlet.
Personnel exposed to high noise levels shall participate in a hearing conservation
program in accordance with DA PAM 40-501.
Hearing loss occurs gradually but becomes
permanent over time.
WARNING
After disconnecting electrical power from the heater and detaching the MS Power Connector,
the Pins A and D of the heater’s male connector remain electrically live with 24VDC. This
condition remains for approximately five (5) minutes while the capacitor discharges.
Personnel
should avoid touching the contacts of this connector as electrical shock may occur.
WARNING
Remove rings, bracelets, wristwatches, and neck chains before performing maintenance on the
heater.
Jewelry can catch on equipment and cause injury or may short across an electrical
circuit and cause severe burns or electrical shock.
WARNING
Remove A20 heater from vehicle prior to any welding on hull as transient current could damage
circuit boards.
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