TM 9-4520-258-14
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2-10. UNUSUAL ENVIRONMENTAL / WEATHER.
a.
Operating the ASH Unit In Extreme Cold Conditions. Observe the following precautions when operating the
ASH Unit in extreme cold conditions.
WARNING
Do not touch cold metal parts with bare hands when operating
under extreme cold conditions. Frostbite can cause permanent
injury.
(1)
Always wear arctic mittens when handling heater and other equipment.
(2)
Be careful when handling the air duct assemblies to avoid cracking the ducts.
(3)
Always keep protective covers on the ASH Unit when not in use.
(4)
Perform operating procedure according to paragraph 2-8.
b.
Operating the ASH Unit in Strong Winds and Sandy or Dusty Conditions.
(1)
Strong Winds.
(a)
Should not affect the performance of the ASH Unit.
(b)
Perform operating procedures according to paragraph 2-8.
(2)
Sandy or Dusty Conditions.
(a)
Remove any sand or dust from the air inlet openings before installing the ducts or operating the
combustor motor.
(b)
Keep the protective covers installed when not in use.
(c)
Perform operating procedure according to paragraph 2-8.
c.
Operating the ASH Unit In Extreme Heat Conditions.
(1)
This equipment should not be operated in the heating modes when the ambient temperature is above
100°F for more than 10 minutes.
(2)
Perform operating procedure according to paragraph 2-8.
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