TM 10-4610-241-10
TO 4OW-13-41
2-21. OPERATION IN EXTREME COLD.
WARNING
Do not operate heater in fuel vapor areas or areas lacking adequate ventilation.
Inhalation of fumes will result in serious illness or death.
a.
Locating, installing and operating the equipment at subfreezing temperatures requires taking precautions.
Adequate shelter and heating are required when operating in temperatures below 32°F (0°C).
b.
When locating the equipment, take advantage of existing shelter and windbreaks.
c.
Erect tenting shelters for protection. The product water storage tanks may be installed inside a tent or other
shelter. Filtered water may be recirculated with the distribution pump between the two product water
storage tanks to prevent freezing in the hose lines, tank outlets and pump. Fuel, coal or wood burning
heaters or other heating devices may be installed inside the erected tents to protect the equipment and
prevent freezing of water. During cold weather, keep in mind all warnings, cautions, and procedures.
d.
Install canvas covers on pumps.
WARNING
To prevent hands from freezing to metal, wear rubber gloves when handling hose
couplings and setting valves.
CAUTION
If raw water hoses freeze, poor water flow will reduce pressure in R.O. pump. The
R.O. PUMP LOW PRESSURE lamp will come on and R.O. pump will shut itself
off. Bring hoses under cover until ice melts.
Turn valves slowly during cold weather, because metal contracts and becomes very
brittle.
NOTE
The ROWPU produces less product water when the temperature of raw water drops.
e.
During operation in extreme cold, inspect the ROWPU closely for split or frozen hoses, clogged suction
and backwash strainers, and cracked couplings.
2-150
