Culligan M1 Series Installation, Operation And Service Instructions page 45

Step 3: Finish Cleaning Procedure
1. When 30 minutes have passed, adjust the system pressure to the pressure recorded during low pressure.
Measure the product flow rate, then compare this flow to the flow recorded during low pressure. If cleaning is
successful a noticeably higher product flow should now be observed.
2. Turn the unit power off. Remove the concentrate and product tubing from the solution tank and direct them both
to drain. Apply power to the unit, and then press the RUN NOW button to draw most of the remaining cleaning
solution from the tank.
CAUTION! Do not allow the unit to draw air from the tank, or the pump will be damaged.
3. Turn the unit power off. Close the cleaning valve, reconnect the wires to the pressure switch, then open the
feed water valve.
4. Apply power to the unit, press the RUN NOW button, and then flush the cleaning solution from the unit for 30
minutes or until the pH levels of the concentrate water and the product water remain constant.
CAUTION! Soft water must be used to flush the caustic solution, or hardness will precipitate. If
soft water is not available, use temporary portable exchange softener tanks.
5. Adjust the system pressure to the normal value. Measure all flows, TDS levels, pressures, and temperature.
Compare these values with the "new" and "now" values to determine if cleaning has been successful. If cleaning
has not been successful, contact the service department at Culligan International Company for suggestions on
alternate cleaning chemicals. If cleaning has been successful, note which chemicals were effective. Use the
same chemical(s) when the unit is cleaned again.
6. Replace the Pre-filter cartridge.
7. After cleaning and rinsing have been completed, connect the product tubing to the service line. Remove the
jumper installed and reconnect the pressure switch. Rinse the cleaning tank and tubing with fresh water.
Cat. No. 01022940
Service and Maintenance 41