TM 10-4610-310-14
OPERATOR INSTRUCTIONS
LIGHTWEIGHT WATER PURIFIER
CHEMICAL INJECTION
GENERAL
This work package contains information and instructions on injecting chemical solutions into the Lightweight
Water Purifier (LWP). The bisulfite or coagulant is injected into the raw water input line before entering the
settling tank if the source water contains chlorine. The antiscalant solution is injected into the high-pressure
pump input line before the high-pressure plunger pump for the Reverse Osmosis (RO) elements. The HTH
solution is injected into the product water line before the water enters the product tank T3 for residual
disinfection.
If the source water is above 150 Formazine Turbidity Units (FTU) or Nephelometric Turbidity Units (NTU), then
coagulant injection is required. The preferred term, NTU, is to be used with the LWP. Both provide the same
values.
CHEMICAL STORAGE
The LWP is provisioned with enough chemicals for approximately 140 hours of operation. The sodium
hypochlorite (bleach) and calcium hypochlorite (M229) are stored inside two dry boxes on the chemical module
separately. The rest of the chemicals are carried inside a storage container, which is in turn placed inside the
cable box for protection. See Figure 1 and Figure 2.
WARNING
Never mix the chemicals, especially calcium hypochlorite, with any other chemicals. Death or
injury to personnel may result.
M217
CITRIC ACID
M334 UF
CLEANER
M323 SODIUM
METABISULFITE
M331 UF
DETERGENT
M325 LOW
pH
M326 HIGH
CLEANER
pH
CLEANER
M321
ANTISCALANT
M322
COAGULANT
CABLE BOX
Figure 1. Chemical Storage In Cable Box.
