TM 5-4610-218-12
NOTE
slurry feeder.
Coagulated water may be obtained for
general purpose from the valve CV-15.
(3) Using a measuring cup, measure out 1/2
pound of diatomaceous earth. Place the di-
atomaceous earth in a three-gallon rubber pail and
add one gallon of coagulated water to the pail and
operation.
mix well.
SET CONTROLLER VALVE CV-45 AT 25 GPM.
STEP 1.
PLACE CONTROL VALVE CV-46 IN FILTER POSITION.
STEP 2
OPEN FILTERED WATER EFFLUENT CONTROL VALVE
STEP 3.
CV-50.
STEP 4.
CHARGE DIATOMITE COMPARTMENT OF SLURRY
FEEDER.
WARNING: ALTHOUGH FILTERED WATER IS AVAILABLE FROM
WATER PURIFICATION UNIT, TESTS MUST BE TAKEN
BEFORE INITIAL ISSUE OF FILTERED WATER AND AT
REGULAR INTERVALS SO THAT CHLORINE RESIDUAL
CAN BE DETERMINED AND KEPT AT THE DESIRED
LEVEL.
STEP 5. WHEN THERE IS NO DEMAND FOR FILTERED WATER
BUT IT IS DESIRED TO KEEP COATING ON FILTER
ELEMENTS, DO NOT SHUTDOWN FILTERS. PLACE
CONTROL VALVE CV-46 IN THE RECIRCULATION
POSITION AND REDUCE THE SETTING OF FLOW
CONTROLLER VALVE CV-45 TO THE MINIMUM FLOW
REQUIRED TO KEEP THE COATING FROM FALLING
FROM THE FILTER ELEMENTS.
TS 4610-218-12/2-17
Filter operation.
Figure 2-17.
(2) Fill the pump housing with filtered water
NOTE
to prime the pump, then replace the plug.
Test must be taken before initial issue
(3) Press the distribution pump START but-
of water and at regular intervals, 80
ton (fig. 2-11).
that the chlorine residual can be de-
termined. If the residual chlorine con-
tent is less than 5 parts/million or less
2-11. Stopping Diatomite Filter.
than the amount prescribed by the Me-
a. General. When a filter run is stopped for any
dical Officer, manually add and stir
reason, backwash the filter elements and wash the
sufficient calcium hypochlorite to the
filter bottom.
water in the storage tanks to increase
the residual chlorine. Do not drink
the dechlorinated water until 30
c. Draining. When the filter is shut down, it is
minutes after the additional calcium
necessary that all liquid be drained from the filter
hypochlorite has been added.
section. To drain the filter section, perform the fol-
lowing steps referring to figure 2-1 for location of
2-10. Starting Distribution Pump.
all valves.
a. General. Each unit is provided with an elec-
(1) Open recirculation-filter water line drain
trical driven, self-priming centrifugal pump and 50
outlet cap DOC-39.
feet (15.24 m) of 1-1/2 inch rubber lined cotton hose,
(2) Open recirculation-filter water line con-
for distributing the filtered water.
trol valve CV-40 and set controller valve CV-45 at
30 gpm. Open draincocks DC-51 and DC-52 on con-
b. Service and start as follows:
troller valve CV-45.
(1) Remove the pump housing priming plug
(3) Turn filter effluent control valve CV-46 to
2-45
