Manitowoc STH042 4/16 Manuale utente

Part Number STH042 4/16

Undercounter Ice Machines

Technician’s Handbook

This manual is updated as new information and models

are released. Visit our website for the latest manual.

www.manitowocice.com

Safety Notices

Read these precautions to prevent personal injury:

• Read this manual thoroughly before operating,

installing or performing maintenance on the

equipment. Failure to follow instructions in this

manual can cause property damage, injury or death.

• Routine adjustments and maintenance procedures

outlined in this manual are not covered by the

warranty.

• Proper installation, care and maintenance are

essential for maximum performance and trouble-free

operation of your equipment.

• Visit our website www.manitowocice.com for manual

updates, translations, or contact information for

service agents in your area.

• This equipment contains high voltage electricity and

refrigerant charge. Installation and repairs are to be

performed by properly trained technicians aware of

the dangers of dealing with high voltage electricity

and refrigerant under pressure. The technician must

also be certified in proper refrigerant handling

and servicing procedures. All lockout and tag out

procedures must be followed when working on this

equipment.

• This equipment is intended for indoor use only. Do

not install or operate this equipment in outdoor

areas.

• As you work on this equipment, be sure to pay close

attention to the safety notices in this handbook.

Disregarding the notices may lead to serious injury

and/or damage to the equipment.

nWarning

Follow these electrical requirements during

installation of this equipment.

• All field wiring must conform to all applicable

codes of the authority having jurisdiction. It is

the responsibility of the end user to provide the

disconnect means to satisfy local codes. Refer to

rating plate for proper voltage.

• This appliance must be grounded.

• This equipment must be positioned so that

the plug is accessible unless other means for

disconnection from the power supply (e.g., circuit

breaker or disconnect switch) is provided.

• Check all wiring connections, including factory

terminals, before operation. Connections can

become loose during shipment and installation.

• For a cord-connected appliance, the following must

be included:

• Do not unplug by pulling on cord. To unplug,

grasp the plug, not the cord.

• Unplug from outlet when not in use and before

servicing or cleaning.

• Do not operate any appliance with a

damaged cord or plug, or after the appliance

malfunctions or is dropped or damaged in any

manner. Contact the nearest authorized service

facility for examination, repair, or electrical or

mechanical adjustment

nWarning

Follow these precautions to prevent personal

injury during installation of this equipment:

• Installation must comply with all applicable

equipment fire and health codes with the authority

having jurisdiction.

• To avoid instability the installation area must be

capable of supporting the combined weight of

the equipment and product. Additionally the

equipment must be level side to side and front to

back.

• Ice machines require a deflector when installed on

an ice storage bin. Prior to using a non-OEM ice

storage system with this ice machine, contact the

bin manufacturer to assure their ice deflector is

compatible.

• Remove all removable panels before lifting and

installing and use appropriate safety equipment

during installation and servicing. Two or more

people are required to lift or move this appliance to

prevent tipping and/or injury.

• Do not damage the refrigeration circuit when

installing, maintaining or servicing the unit.

• Connect to a potable water supply only.

• This equipment contains refrigerant charge.

• Installation of the line sets must be performed by

a properly trained and EPA certified refrigeration

technician aware of the dangers of dealing with

refrigerant charged equipment.

nWarning

Follow these precautions to prevent personal

injury while operating or maintaining this

equipment.

• Legs or casters must be installed and the legs/

casters must be screwed in completely. When

casters are installed the mass of this unit will allow

it to move uncontrolled on an inclined surface.

These units must be tethered/secured to comply

with all applicable codes. Swivel casters must be

mounted on the front and rigid casters must be

mounted on the rear. Lock the front casters after

installation is complete.

• Some 50 Hz models may contain up to 150 grams

of R290 (propane) refrigerant. R290 (propane)

is flammable in concentrations of air between

approximately 2.1% and 9.5% by volume (LEL lower

explosion limit and UEL upper explosion limit). An

ignition source at a temperature higher than 470°C

is needed for a combustion to occur.

• Refer to nameplate to identify the type of

refrigerant in your equipment.

• Only trained and qualified personnel aware of the

dangers are allowed to work on the equipment.

• Read this manual thoroughly before operating,

installing or performing maintenance on the

equipment. Failure to follow instructions in this

manual can cause property damage, injury or

death.

• Crush/Pinch Hazard. Keep hands clear of moving

components. Components can move without

warning unless power is disconnected and all

potential energy is removed.

• Moisture collecting on the floor will create a

slippery surface. Clean up any water on the floor

immediately to prevent a slip hazard.

nWarning

Follow these precautions to prevent personal

injury while operating or maintaining this

equipment.

• Objects placed or dropped in the bin can affect

human health and safety. Locate and remove any

objects immediately.

• Never use sharp objects or tools to remove ice or

frost.

• Do not use mechanical devices or other means to

accelerate the defrosting process.

• When using cleaning fluids or chemicals, rubber

gloves and eye protection (and/or face shield) must

be worn.

DANGER

Do not operate equipment that has been misused,

abused, neglected, damaged, or altered/modified

from that of original manufactured specifications.

This appliance is not intended for use by persons

(including children) with reduced physical, sensory

or mental capabilities, or lack of experience

and knowledge, unless they have been given

supervision concerning use of the appliance

by a person responsible for their safety. Do not

allow children to play with, clean or maintain this

appliance without proper supervision.

DANGER

Follow these precautions to prevent personal

injury during use and maintenance of this

equipment:

• It is the responsibility of the equipment owner to

perform a Personal Protective Equipment Hazard

Assessment to ensure adequate protection during

maintenance procedures.

• Do Not Store Or Use Gasoline Or Other Flammable

Vapors Or Liquids In The Vicinity Of This Or Any

Other

• Appliance. Never use flammable oil soaked cloths

or combustible cleaning solutions for cleaning.

• All covers and access panels must be in place and

properly secured when operating this equipment.

• Risk of fire/shock. All minimum clearances must be

maintained. Do not obstruct vents or openings.

• Failure to disconnect power at the main power

supply disconnect could result in serious injury or

death. The power switch DOES NOT disconnect all

incoming power.

• All utility connections and fixtures must be

maintained in accordance with the authority

having jurisdiction.

• Turn off and lockout all utilities (gas, electric,

water) according to approved practices during

maintenance or servicing.

• Units with two power cords must be plugged

into individual branch circuits. During movement,

cleaning or repair it is necessary to unplug both

power cords.

We reserve the right to make product improvements at

any time. Specifications and design are subject to change

without notice.

Table of Contents

Part Number STH042 4/16 9

General Information

Model Numbers............................... 15

How to Read a Model Number ................ 16

Ice Machine Warranty Information............ 17

Installation

Location of Ice Machine....................... 18

Ice Machine Clearance Requirements......... 19

Ice Machine Heat of Rejection ................ 19

Leveling the Ice Machine...................... 20

Electrical Requirements....................... 21

Electrical Specifications....................... 22

Water Service/Drains ......................... 24

Water Supply.............................. 24

Water Inlet Lines .......................... 24

Drain Connections ........................ 25

Cooling Tower Applications................ 25

Water Supply and Drain Line Sizing/

Connections .............................. 26

10 Part Number STH042 4/16

Maintenance

Interior Cleaning and Sanitizing .............. 27

General ................................... 27

Cleaning and Sanitizing Procedure......... 27

Touch Pad Operation ...................... 28

Remove Parts for Cleaning................. 32

Preventative Maintenance Cleaning .......... 37

Ice Machine Inspection ....................... 38

Cleaning the Condenser ...................... 39

Removal from Service/Winterization ......... 40

Bin Removal .................................. 41

Operation

Touch Pad Features ........................... 43

On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Delay ..................................... 44

Clean ..................................... 44

Bin Full.................................... 45

Service.................................... 45

Ice Making Sequence of Operation ........... 46

Control Board Timers ...................... 49

Safety Limits .............................. 50

Energized Parts Chart...................... 52

Operational Checks ........................... 54

Ice Thickness Check ....................... 54

Ice Thickness Adjustment.................. 54

Minimum/Maximum Slab weight .......... 55

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