U.S. Coast Guard Certified-Type I MSD


TABLE OF Contents

I. DESCRIPTION........ . . . . .
        1. Treatment Unit
        2. Control Unit
        3. Salt Feed Unit .........
III. INSTALLATION....... . . . . .
   A. Mounting
        1. Treatment Unit
        2. Control Unit
        3. Salt Feed Unit .......
   B. Wiring
        1. Control Unit
        2. Treatment Unit
        3. Battery Power .......
   A. General . . . . . . . . .
   B. Operating Sequence
   C. Operating Instructions . .
   D Salt Feed Adjustment ....
   E. Salt Feed Tank Refilling Procedures
VIII. STORAGE . . . . . . . .
   A. Winter Storage ........
   B. Recommissioning . . . .
X. PARTS LIST .............
XI. SPECIFICATIONS and control Panel Internal wiring

LECTRA/SAN Is a US Coast Guard certified Type I Marine Sanitation Device, The unit is available in 12 volt D.C., 24 volt DC.. and 32 volt D.C. models. (U.S. Coast Guard Certification numbers 159.1511001/311; 15915/100114/1; and 15915/1001/5/1 respectively.
LECTRA/SAN provides flow-thru treatment of the wastewater from a marine toilet by maceration and chlorination. The treatment process destroys bacteria and odors. reduces solids, and lowers the biochemical oxygen demand of the wastewater The disinfecting agent, hypochlorous acid, is produced during the treatment cycle by electrolyzing the seawater used to flush the toilet. On brackish or fresh water a salt solution is automatically metered into the flush water
The LECTRA/SAN system is activated before flushing the marine toilet by turning the knob on the control unit. The flush water enters the flooded treatment chamber displacing an equal volume of treated waste for overboard discharge through a sea cock The control unit automatically times the treatment cycle The treatment tank holds about four flushes; therefore, the waste is treated four times before discharge A complete description of the LECTRA /SAN operate on s given in Section V.

1. Treatment Unit
The three gallon treatment tank is divided into two chambers. The dividing partition contains the electrode pack with electrodes protruding into each chamber The first chamber contains the macerator which reduces the sewage to tiny particles The electrode pack produces sodium hypochlorite from the salt in the water which treats and disinfects the macerated sewage. During subsequent flushes this macerated sewage flows through a crossover pipe into the second chamber The waste must flow up and over into the second chamber which keeps larger particles in the macerating chamber for further size reduction. In the second chamber the waste receives further treatment and mixing before it is discharged

2. Control Unit
The control unit contains a timing mechanism and a relay for the automatic treatment cycle Operating lights indicate when the unit is operating in the flush/pre-treat and treatment portions of the cycle. A meter indicates whether the electrode pack is operating in a low, normal or high range, and thus serves as an indicator of the degree of treatment attained

3. Salt Feed Unit
A solution of ordinary table salt is stored in the two gallon salt feed tank. This salt solution is metered into the flush water when it is brackish  or fresh if seawater is used for flushing, the salt solution addition is not required. An alternate method of salt addition to the flush water is to manually pour about 1 3/4 oz of granular table salt into the toilet during flushing This method is often used when the boat only occasionally cruises into brackish or fresh water. in which case some owners do not install the salt feed tank or the "T" check valve

See Section IX. Materials Required, for a list of items needed to mount and wire LECTRA/SAN

1. Treatment Unit
The LECTRA/SAN treatment unit should be located as close to the toilet as possible, preferably within three feet, and with the treatment unit discharge elbow fitting lower than the head discharge fitting. If it is impossible to locate the treatment unit with n three feet. or ii the treatment unit is on a level with or higher than the head. install a vented loop' between the head and the treatment unit The vented loop MUST be vented to the exterior of the boat by means of a 1/4" or larger I.D. hose and NOT to the interior of the head compartment as is the usual practice.
The reason for installing the vented loop is that the "joker" or discharge valves on most heads cannot always be depended upon to prevent back-flow See figure 2a.
A solid support with side flanges should be built to nest the treatment unit in much the same way that a storage battery is secured. In no case depend upon hose connections to secure it A sponge rubber pad placed under the unit will reduce operating noise See figure 1.
We favor non-hardening pipe sealing compound in making up all screw-in plumbing connections. Inlet fittings are provided for either side of the treatment unit. Use whichever is more convenient and plug the other with the 1 1/2" NPT PVC plug that is included. Use 1 1/2" ID plastic or neoprene hose or wherever possible PVC piping    Do not use metal pipe -- it is too heavy and is also prone to corrosion. Where sharp bends cannot be avoided it is preferable to use standard auto radiator hoses that auto supply houses carry in a variety of pre-molded curves. Do not use "flexible" type hoses that have internal annular grooves. The inside of the hoses should be smooth so as to not impede the flow of sewage Pre-molded curved hoses are far preferable to PVC sharp plumbing "ells".

NOTE: See the updated information on sanitation hose concerning
        use of hose other than marine sanitation hose.

In connecting the discharge hose to the discharge seacock, it is best to work from the seacock toward the treatment unit. Use screw type

(Continued on page 220)

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