Technical information

12/01/02

PREVENTATIVE MAINTENENCE: Perventative Maintenance

is the key to long equipment life and maximum efficiency.

Hoshizaki recommends preforming the following mainte-

nance steps at least annually. The PM frequency will de-

pend 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.

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 municipali-

ties 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.

12/20/03

2/20/03