TM 10-4610-310-14
WP 0017 00
OPERATOR INSTRUCTIONS
LIGHTWEIGHT WATER PURIFIER
OPERATION IN UNUSUAL CONDITIONS
DUST, HEAT, HIGH TDS SOURCE AND WET AREAS
GENERAL
This work package contains information and instructions for operating the Lightweight Water Purifier (LWP) in
unusual environmental conditions such as dust, heat, high TDS source water (higher than 45,000 ppm) and wet
areas.
OPERATION IN DUSTY AND SANDY AREAS
1. Protect the LWP equipment. Keep all enclosures shut and secured.
2. Keep the ground around the LWP damp to help prevent loose, blowing sand and dirt.
3. Shelter modules when possible from blowing winds.
OPERATION IN EXTREME HEAT
1. To prevent damage to the Reverse Osmosis (RO) elements in the RO element module, keep elements
away from temperatures above 113F (45C).
2. When air temperature is above 90F (32C), position the LWP in the shade if possible.
3. Monitor water levels in the settling tank T1, fabric filtrate tank T4, and product tank T3 more frequently in hot
weather.
4. Carefully inspect power cable insulation for damage.
OPERATION WHEN USING SOURCE WATER WITH TDS GREATER THAN 45,000 PPM
If the feed water TDS is higher than 45,000 ppm, bypassing membranes may be needed if product
water of less than 1000 ppm is produced.. This is done by opening the sample valves from vessel 7,6,
and if needed, 5 all the way and drain the permeate out. The purpose is to take the permeate from the
tail end vessels, which has higher TDS, out of the final product water. The product water will be made at
a reduced flow rate. Never exceed 1200 psi.
WARNING
Never exceed 1200 psi. Failure to follow this precaution may result in injury or death to
personnel.
1. Bring the operating pressure to 1200 psi by closing the RO reject valve V11 slowly.
2. Take the TDS reading of the product water.
3. If it is higher than 1000 ppm, bypass vessel 7 by opening the sampling valve from vessel 7 and
allow the permeate to drain out. See figure 1 for locations.
0017 00-1
