TM 10-4610-232-12
(a)
Water is flowing through the waste outlet hose.
NOTE
If water is not flowing through the hose, check that pressure control valve is open and
waste hose is not capped.
(b)
FEED PRESSURE LOW light (2) is off.
(c)
System pressure control valve (3) is open.
(d)
Cartridge inlet/outlet pressure gage (4) shows at least 50 psig (345 kPa). All flags on media level gage should be
orange before continuing.
NOTE
If water level in media filter is low when the high pressure pump is started, the low level
switch (P37) will not activate the air blanket solenoid (V20).
(e)
Push HIGH PRESSURE PUMP START (5). Check that AIR BLANKET V20 blue light (6) is on.
CAUTION
Stop pump and refer to Troubleshooting, Table 3-1 if pump vibrates excessively, or the
piping pulses severely.
CAUTION
DO NOT exceed 900 psig (6210 kPa).
(f)
When the system pressure gage stops rising, turn system pressure control valve (3) slowly clockwise until product
flowmeter (7) shows mission normal water flow. Refer to Tables 2-18 and 2-20. Do not exceed 900 psig. Refer to
troubleshooting, Table 3-1, if mission normal flow cannot be obtained.
(g)
Check generator as follows:
Adjust throttle to provide 60 Hz.
Adjust voltage to provide 440 VAC.
CAUTION
Stabilizers must be "'fine tuned"' to eliminate noise and excess vibration which will cause
damage to the ROWPU.
(h)
Check high pressure pump assembly for noise and excessive vibration. Slowly decrease air pressure in the
stabilizers until noise and vibration diminish. If the noise and vibration do not diminish and all the air is out of the
stabilizers, then slowly and equally put air into the stabilizers until noise and vibration diminish.
CAUTION
Operating at push limit may damage RO elements and require more frequent leaning.
(4)
The average mission normal water flow for the ROWPU is related to the type of water and its temperature as listed by
Tables 2-18 and 2-20. Higher water flows up to listed limits may be set under "push" conditions to meet unusual mission
demands. Do not push beyond the flow listed for 75F (24C) when operating on well water sources
Table 2-18. Average Mission Normal Water Flow for Fresh/Brackish
Water Sources Up to 1000 ppm TDS
Temp. F (C)
Flow gpm (I/m)
Daily Gallons (ltrs)
32 (0)
26 (98)
29,000 (110,000)
35 (2)
27 (102)
31,000 (117,000)
40 (4)
29 (110)
33,000 (125,000)
45 (7)
32 (121)
36,000 (136,000)
50 (10)
34 (129)
39,000 (148,000)
55 (13)
37 (140)
42,000 (159,000)
60 (16)
40 (151)
45,000 (170,000)
65 (18)
44 (167)
50,000 (189,000)
70 (21)
48 (182)
54,000 (204,000)
75 (24)
53 (201)
60,000 (227,000)
Over 75 (24)
53 (201)
60,000 (227,000)
Push Limit
70 (265)
79,000 (299,000)
Change 12 2-79
