SECTION IV. OPERATION UNDER UNUSUAL CONDITIONS.
2-29. GENERAL. This section contains instructions for use of ROWPU in unusual conditions.
2-30. HOT WEATHER OPERATION.
a. Temperature Limits. Operation of the ROWPU changes when outside temperatures or source water temperatures
exceed 85°F (29°C). The capability and reliability of the ROWPU may be reduced if temperatures exceed those listed
Maximum deployment temperature: 110°F (43°C).
Maximum storage temperature: 145°F (63°C).
Maximum RO element storage temperature: 110°F (43°C).
Maximum source water temperature: 110°F (43°C).
b. Motors. Motors may overheat when the ROWPU is used in hot weather in direct sunlight. Shade netting should be
used to protect raw water and distribution pump motors in extreme conditions.
c. Main Contro/ Pane/ (Figure 2-68). If temperatures inside the ROWPU reach 120°F (49°C) motor starter thermal
overloads may trip. Keep ISO container (van) doors open. Push appropriate starter resets (1) if overload trips occur.
Figure 2-68. Starter Resets
d. High Pressure Pump Assembly. Open both access flaps to provide ventilation and cooling.
To avoid unsafe work conditions do not allow the temperature inside the ROWPU to rise
above 120°F (49°C). Keep doors open and water flowing to help cool the ROWPU.
(1) The RO elements must not be stored where temperatures may rise above 110°F (43°C). If there is a possibility
of higher temperatures, move RO elements to another storage site.
(2) The ROWPU itself maybe stored at up to 145°F (63°C) inside temperature.
Do not store the ROWPU where direct sunlight can cause the temperature inside the
ROWPU to rise above 145°F (63°C).