Disassemble the drain line and clean as required. Ensure that the drain line is clear (including the drain opening in
the evaporator) before using a cleaner. Reassemble the drain line.
Soft scale may be removed as described under "Soft Scale Removal." Silica scale may be removed as
described under "Silica Scale Removal." To remove hard scale or organic scale, fill, the evaporator with acid cleaner
(see "Hard Scale Removal").
Inspect the constant level device and drain line and clean as required.
G. Reassemble the still. Assembly is essentially the reverse of disassembly.
Connect the water, waste and distillate lines.
Start the still as described under INITIAL STARTUP.
Lower the water flowrate with the water throttling valve until steam spouts out of the condenser vent at least 12-
inches. Operate in this manner for 30 to 60 minutes to sterilize and clean out the still.
CAUTION: VENTILATE THE ROOM DURING THIS OPERATION.
Readjust the still as described in INITIAL STARTUP.
GENERAL. This section contains troubleshooting, testing and repair instructions. A troubleshooting chart is included to
help the repair man find the difficulty quickly.
TESTS FOR CONDENSER LEAKS
Visual Test for Leaks. A simple test for condenser leaks may be performed as follows:
A. Disconnect the still from the electrical service.
B. Let the water flow through the condenser until the condenser is cold.
C. Note whether there is a flow, even in drop quantities, from the distillate outlet. If there is a continuous flow, it is
possible that there is a leak from the cooling water side to the distillate side. If this is the case, the condenser (must be
NOTE: The condenser cannot be repaired and must be replaced as a unit.
Pressure Test for Leaks. If a more positive test is required, proceed as follows:
Remove the condenser from the still.
Remove the water discharge tubing. Plug the discharge connection on the condenser with a plug or stopper.
Attach a hose to the water inlet connection on the condenser and apply about 5-psi of air pressure to the