Area Requirements

PRE-INSTALLATION

Pre-Installation Considerations

Purer water will freeze first in the ice making molds. The reason for this is that anything dissolved in water lowers the water’s freezing temperature.

This concentrates most of the impurities in the ice maker water reservoir where they may form hard deposits known as scale. The Model 315 dilutes the concentration of min- erals by over-filling the reservoir during the harvest cycle (with the excess water flowing down the drain). About 3 quarts of water flow into the unit each cycle. About 1 quart of that rinses the reservoir and goes down the drain.

Some impurities will inevitably remain, and will stick to the parts in the ice maker, and will cause malformed ice cubes. Eventually, built up mineral scale can shorten ice maker life.

To keep the ice maker operating properly, these impurities or minerals will have to be regularly dissolved by an acid cleaning, using Sub-Zero ice maker cleaner. Directions for this may be found in the section under cleaning.

In general, it is always a good idea to filter the water. A water filter, if it is of the proper type, can remove taste and odors as well as particles. Some methods of water treat- ment for dissolved solids include reverse osmosis, and polyphosphate feeders. A reverse osmosis system should include post treatment to satisfy the R.O. water’s "aggres- siveness".

Deionized water is not recommended.

Because water softeners exchange one mineral for anoth- er, Sub-Zero does not recommend their use for ice makers. Where water is very hard, softened water may result in white, mushy cubes that stick together.

Sub-Zero suggests, that if in doubt about the water, that a local point of use water specialist be contacted for recom- mendations on water treatment.

Before moving the units in place, be sure the finished dimensions, electrical and plumbing locations and mini- mum door clearances are accurate. Refer to the "Pre- installation Specifications" illustrations on pages 6 and 7.

Be sure your plumber, electrician and cabinet installer have this information before finishing work is completed.

The Model 315 is a gravity drain model that requires a drain tube that’s pitched down from the outlet at the back of the cabinet to the connection to the sanitary sewer.

The Model 315P has a built in drain pump that will pump water up to a drain point, such as a nearby sink.