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TIERED FLOW DECK
A multi-tiered flow deck is incorporated in all LF Series 4000
tablet feeders. This allows consistent chemical application
to low, sustained, variable, intermittent and surge flows.
Liquid is channeled through the three tiers of the flow deck
in proportion to the hydraulic load (See Figure D). The
lowest tier of the flow deck is the inert drainage tier. The inert
drainage tier directs liquid to the feed tube during low flow
conditions and forms a drainage channel to dry the tablets
when there is no flow. As the flow increases, the liquid is
channeled through the intermediate flow tier. This tier directs
the increased flow to the chemical tablets and allows more
tablets to contact the liquid. At higher flow rates, the liquid
rises to the upper flow tier. The upper tier dissipates excess
flow velocity and produces a consistent chemical dosage.
The flow deck incorporates a retaining ring with locating ribs
for the feed tubes. The locating ribs engage positioning slots
in the feed tube to secure the tube in the proper installation
position for the feeder's rated capacity.
FIGURE C
CONTINUOUS AND UNSPLICED
CLEARCHECK
FEED TUBE AND CAP
®
The LF Series 4000 tablet feeders are equipped with molded,
chemical feed tubes with twist lock caps. Each feed tube and
cap are constructed of NSF/ANSI Standard 61 listed PVC
for durability and long life. The feed tube is manufactured
with the translucent ClearCheck design. This design allows
the operator or service provider to determine whether tablet
refill is required simply by visual inspection without removing
the tube from the feeder. The feed tube utilizes chemical
tablets with the nominal weight and dimensions of 5 ounces,
2 5/8" diameter and 13/16" to 1" height. Slots molded directly
into the bottom of the feed tube allow the chemical tablets
to dry during intermittent or prolonged no flow periods. The
twist lock cap fits securely inside the chemical feed tube to
allow convenient installation of the tube and cap within a 4"
Schedule 40 PVC riser pipe.
REMOTE REMOVAL SYSTEM
A remote removal system is available for direct burial
installations to allow for safe removal, recharge and
reinstallation of the feed tubes from grade. The remote
removal system consists of four top-threaded feed tube
caps, four extensions and four handles. For use, replace the
standard caps with the top-threaded caps. The top-threaded
caps lock into the feed tubes, then the extensions and handles
are threaded onto the top of the new caps (See Figure E).
Additional extensions are available for deeper installations
and can be added or removed any time. The extensions
and handles remain in place during system operation and
standard feed tube filling instructions apply.
FIGURE D
THREE TIERED FLOW DECK
FILLING AND INSTALLING THE FEED TUBE
Before handling any chemical tablets, carefully read the
product container label and the CAUTION section of these
instructions. When filling the feed tube, always wear rubber
gloves and safety goggles or a face shield for proper
protection. Follow all handling instructions for the chemical
tablets used. To fill the feed tube, remove it from the feeder.
Rinse the feed tube and cap thoroughly with fresh water.
Dry as required. Hold the tube, slotted end up, at a 30° to
45° angle and slide the chemical tablets into the open feed
tube, one tablet at a time. Insure that each tablet lies flat,
against the next and evenly on top of one another, in the
feed tube (See Figure F). Use a gloved hand to retain the
tablets inside the open end of the inverted tube until it has
been evenly and completely filled. Carefully return the tube
to the upright position. Replace the cap and slide the feed
tube into the body of the feeder, slotted end down. The
slots in the bottom of the feed tube must properly engage
the locating ribs molded into the flow deck. Be sure the feed
tube is fully engaged within the feeder and rests evenly on
the flow deck. Utilize the Chemical Consumption Record on
the back of this manual to track the chemical refill pattern.
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