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Page Title:
Table 2-1. Preventive Maintenance Checks and Services (cont) |
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 TM 55-1905-223-24-7
Table 2-1. Preventive Maintenance Checks and Services
D-Daily
W-Weekly
M-Monthly
Q-Quarterly
S-Semiannually
AR-As Required
ITEM
INTERVAL
Items to be
NO.
D W M Q S AR Inspected/Serviced
Procedures
6
o
RO Element
Chemically clean the RO element:
a. Start up system and run in the normal mode.
b. Turn off main power switch.
c.
Open the high pressure bypass valve on the
front dash of the unit.
d. Turn valve to the cleaning mode (arrow up).
e. Turn off the water quality monitor power
switch.
f.
The RO system is now in a closed-loop mode
and is ready for the addition of any
treatment chemicals.
g. Add package #1 (sodium metasilicate) from the
cleaning kit into a mixing bottle and mix
thoroughly with unchlorinated product water.
r.
Remove micron filter cartridges.
s.
Pour solution #1 (sodium metasilicate) into
prefilter. Turn on main power switch and
recirculate for 50 minutes with no back
pressure (high pressure bypass valve open).
t.
If the temperature is below 60F at the start
of the cleaning cycle, recirculate the
solution for 1 hour.
u. At the end of 50 minutes or 1 hour, turn the
cleaning valve to the operations mode (arrow
pointing down) to divert the chemical
solution to drain).
2-10
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