TECH - SPEC'S Technician's Pocket Guide - Hoshizaki America, Inc.

PREVENTATIVE MAINTENENCE: Perventative Maintenance
is the key to long equipment life and maximum efficiency.
Hoshizaki recommends preforming the following maintenance
steps at least annually. The PM frequency will depend
on the local water quality and operating conditions.
PREVENTATIVE MAINTENANCE STEPS:
1. Clean the removable air filter. Hoshizaki air-cooled units
include a front accessible, cleanable air filter. This filter
collects dirt, dust, and grease can be cleaned with warm
soapy water. Hoshizaki recommends cleaning the air filter
twice a month or more as conditions dictate.
2. Service the external water filter system (if equipped)
and check and clean inlet water valve screen.
3. Clean and sanitize the water system and bin. A cleaning
label with detailed instructions is usually located on the
inside of the front panel.
4. Check bearings for wear annually on Flaker/DCM.
Pull the auger and inspect evaporator, auger, and bearing
surfaces for wear. More frequently bearing inspections
may be needed in areas with poor water quality.
5. Visually inspect the unit for loose wires, oil spots, water
drips, etc.
6. Clean & wipe exterior with a soft cloth and neutral cleaner.
STAINLESS STEEL CLEANING:
Water quality is constantly changing and local municipalities
are now adding higher levels of chlorine, chloramine,
and sometimes, chlorine dioxides to reduce bacteria in the
water. Stainless steel is a durable metal however it can be
suseptable to corrosion from exposure to chlorine gas.
As ice forms on a cuber evaporator, chlorine outgases and
the chlorine gas settles in the lowest point in the bin. This
gas sticks to wet surfaces and around the mouth of the bin
and forms hydrochloric acid. If this acid remains on the
stainless steel, rust colored corrosion occurs. With enough
exposure, the corrosion can pit and damage the stainless.
If rust colored corrosion is found, it should be cleaned
throughly with a non-abrasive cleaner and protected with
a stainless steel polish. Heavy corrosion will require some
effort to remove and may require the use of a cleaning
agent like “Brasso” or non-abrasive powdered cleaner like
“Zud” or “Bon Ami”. Care should be taken so as not to
scratch the stainless during the cleaning process.
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