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Maytag MWF4100AWS Operation And Maintenance Manual

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MAYTAG Whole Home Water Filtration System Owners Manual MA1-5

November 2003

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6. Open the outlet ball valve. Open the closest cold water high demand tap

(ie. bathtub faucet) for 30 minutes.

7. Open all cold taps one at a time for 1 minute. Flush all toilets once.

8. Close the inlet ball valve. Partially drain System using the flush function

for 1 minute to depressurize the System, refer to “Replacing/Cleaning the

Internal Prefilter and Cleaning the System” use the System controller in

step 4.

9. Remove System Cap using the Cap Wrench.

10. If using a Stainless Steel Prefilter, remove and set aside the Stainless Steel

Prefilter in a clean pail or sink.

11. Be sure the water level in the System is approximately ½ way up the

prefilter cavity. Add more water using the inlet ball valve if necessary.

Add 500 mL of unscented household chlorine bleach (approximately

5.25% chlorine), maximum 3 months old, to the System.

Note: Do not allow chlorine to come into contact with the Carbon

Prefilter.

12. Allow the System to soak for 15 minutes. Drain the System using the

controller as in step 8 above.

Note: If the winterization spring start up is combined with the annual

maintenance sanitizing/cleaning procedure, the System must soak for 60 minutes.

If the System is on well water, the chlorine must be substituted with MAYTAG

MC1 Cleaning Solution instead of chlorine bleach. Never mix chlorine bleach

with the MAYTAG MC1 Cleaning Solution.

13. If using a Carbon Prefilter, install a new Carbon Prefilter. If using a

Stainless Steel Prefilter, reinsert the Stainless Steel Prefilter.

14. Replace the System Cap using the Cap Wrench.

15. If using an External Prefilter, drain the External Prefilter Housing (refer to

“Replacing the External Sediment Filter Cartridge” section) and insert a

new External Prefilter Cartridge into the External Prefilter Housing.

Close the External Prefilter stopcock.

16. Partially open the inlet ball valve slowly and watch for leaks. The air vent

will make a hissing noise as air escapes. If no noise is heard, open the

small black cap on top of the air vent. Once the System is full of water,

open the inlet ball valve fully.