Sub-Zero 3 1 5 I P manual A I R S U P P Ly, Wat E R S U P P Ly, Wat E R Q U A L I T Y

S U B - Z E RO MODELS 315I A N D 315IP I N S TA L L AT I O N

ICE MAKER R E Q U I R E M E N T S
To properly make and store ice, the Model	Water with fewer impurities will freeze more
315I(P) requires access to air, potable water,	quickly. This occurs because impurities cause
115 V AC electrical supply and a drain. The	the water temperature to rise. This concen-
ice maker must be installed indoors, in a	trates most of the impurities in the ice maker
controlled environment.	water reservoir where they may form hard
	deposits known as scale. The Model 315I(P)
A I R S U P P LY	dilutes the concentration of minerals by over-
	filling the reservoir during the harvest cycle
The ice maker uses a fan to take in room air at	(with the excess water flowing down the
the front of the ice maker through the right	drain). About three quarts of water flow into
side of the kickplate/grille. It discharges warm	the unit each cycle. About one quart of that
air out the left side of the kickplate/grille.	rinses the reservoir and goes down the drain.
Anything placed in front of the kickplate/grille	Some impurities will inevitably remain and will
will restrict air flow and cause a decrease in
	stick to the inner parts of the ice maker result-
performance and efficiency. The minimum air
	ing in malformed ice cubes. Built up mineral
temperature the ice maker will operate in is
	scale can shorten the life of your ice maker.
50˚F (10˚C), and the maximum is 100˚F (40˚C).
	To keep the ice maker operating properly,
WAT E R S U P P LY	these impurities or minerals will have to be
	regularly dissolved by an acid cleaning using
The ice maker requires a continuous supply of	Sub-Zero ice maker cleaner. Directions for
potable water at no less than 20 psi (1.4 bar) of	cleaning the Ice Making System are on
flowing pressure. Static water pressure should	page 18.
not exceed 80 psi (5.5 bar). The minimum	In general, it is always a good idea to filter the
water temperature the ice maker will operate
	water. A water filter, if it is the proper type, can
in is 40˚F (5˚C), and the maximum is 100˚F
	remove taste and odors as well as particles.
(40˚C).
	Some methods of water treatment for
	dissolved solids include reverse osmosis and
WAT E R Q U A L I T Y	polyphosphate feeders. A reverse osmosis
There is no such thing as “pure” water. All	system should include post treatment to
	satisfy the reverse osmosis water’s ”aggres-
water, including potable water supplied by
	siveness”. Deionized water is not recom-
municipalities, contains some impurities.
	mended.
Water absorbs impurities from the air as rain
and as it flows through the ground. Some of	Because water softeners exchange one mineral
the impurities are solid particles; these are	for another, Sub-Zero does not recommend
known as suspended solids and a fine particle	their use for ice makers. Where water is very
filter will remove them. Other impurities are	hard, softened water may result in white,
chemically bonded to the water molecules and	mushy cubes that stick together.
cannot be filtered out; these are called	If there are questions about the purity of
dissolved solids.
	your water, contact a local point-of-use water
Ice made by the Model 315I(P) will have a	specialist in your area for recommendations on
lower mineral content than the water from	water treatment.
which it was formed.

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