TM 10-7310-241-12&P
2-20 Change 1
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2-11. GENERAL
This section contains special instructions/precautions for operating the HWR under unusual
environment/weather conditions and procedures for operating the HWR under emergency conditions.
2-12. UNUSUAL ENVIRONMENT/WEATHER
The HWR is designed to operate over a wide range of operational and climatic conditions within the protection
of a vehicle. However, the following extreme conditions may require procedures which ensure that safe and
efficient operation of the HWR can be maintained.
a. Operation in Extreme Cold. There are no special instructions/precautions for operating the HWR in
temperatures as low as -40 OF (40 OC).
b. Operation in Extreme Heat. There are no special instructions/precautions for operating the HWR in
temperatures as high 140 OF (60 OC).
c. Operation in High Humidity. There are no special instructions/precautions for operating the HWR in
humidity greater than 94 ± 4% at a temperature of 140 OF (60 OC).
2-13. EMERGENCY PROCEDURES
The HWR should not be operated when either, or both, of the following conditions are present:
a. The load current (up to 15 A) will degrade the host vehicle electrical system.
b. Power usage is restricted for operational reasons.
2-14. NUCLEAR, BIOLOGICAL AND CHEMICAL (NBC) DECONTAMINATION PROCEDURES
Refer to the appropriate host vehicle manual(s) for the NBC decontamination instructions (if any) which are
applicable to the HWR.
