Motak PKU0155 User manual

Part Number: 000016426 Rev 00 01/2021
Ice Machines
Installation and User Manual
For customer service please call - KaTOM @ 1-800-541-8683

Safety Notices
DANGER
Indicates a hazardous situation that, if not avoided, will result in death or serious injury.
This applies to the most extreme situations.
nWARNING
Indicates a hazardous situation that, if not avoided, could result in death or serious
injury.
,Caution
Indicates a hazardous situation that, if not avoided, could result in minor or moderate
injury.
Notice
Indicates information considered important, but not hazard-related (e.g. messages
relating to property damage).
Important
Indicates useful, extra information about the procedure you are performing.
͹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.
͹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.

nWarnings for the Installer
͹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.
͹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.
nWarnings for the End User
͹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.
͹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.
͹It is the responsibility of the equipment owner to perform a Personal Protective
Equipment Hazard Assessment to ensure adequate protection during maintenance
procedures.
͹The on-site supervisor is responsible for ensuring that operators are made aware of the
inherent dangers of operating this equipment.
͹All covers and access panels must be in place and properly secured when operating this
equipment.
͹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 according
to approved practices during maintenance or servicing.
͹Risk of fire/shock. All minimum clearances must be maintained. Do not obstruct vents
or openings.
͹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 utility connections and fixtures must be maintained in accordance with the authority
having jurisdiction.
͹Do not operate any appliance with a damaged cord or plug. All repairs must be
performed by a qualified service company.
͹Never use a high-pressure water jet for cleaning on the interior or exterior of this unit.
Do not use power cleaning equipment, steel wool, scrapers or wire brushes on stainless
steel or painted surfaces.
͹Two or more people are required to move this equipment to prevent tipping.
͹Locking the front casters after moving is the owner’s and operator’s responsibility.
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.
͹All replacement parts must be like components obtained from the equipment
manufacturer’s authorized replacement part network.

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Table of Contents
Part Number: 000016426 Rev 00 08/2020 7
Safety Notices
Section 1
Installation Instructions
Model Numbers ......................................................................11
Ice Deflector............................................................................11
Bin Installation ........................................................................11
Location of Ice Machine...........................................................12
Clearance Requirements..........................................................12
Ice Machine Heat of Rejection .................................................12
Ice Storage Bin Installation ......................................................13
Dispenser Installation..............................................................14
Air Gap ....................................................................................14
Electrical Service......................................................................15
Ground Fault Circuit Interrupter........................................... 16
Minimum Power Cord Specifications.................................... 16
Maximum Breaker Size & Minimum Circuit Amperage Chart....16
Water Supply and Drain Requirements ....................................17
Water Inlet Lines................................................................... 17
Drain Connections ................................................................ 18
Auxiliary Base Drain Installation ........................................... 18
Water Supply and Drain Line Sizing/Connections.....................19
Installation Check List..............................................................20
Before Starting the Ice Machine ........................................... 21
Minimum/Maximum Slab Weight ........................................ 21

8 Part Number: 000016426 Rev 00 08/2020
Table of Contents (continued)
Section 2
Ice Machine Operation
Ice Making Sequence of Operation - PKM0335/PKM0425/
PKM0535................................................................................. 23
Control Board Timers............................................................ 23
Safety Limits.......................................................................... 24
Operational Checks - PKM0335/PKM0425/PKM0535 .......... 24
Ice Thickness Check - PKM0335/PKM0425/PKM0535.......... 25
Ice Making Sequence of Operation - PKU0155 .........................26
Freeze Sequence................................................................... 26
Harvest Sequence ................................................................. 26
Automatic Shut-off ............................................................... 27
Safety Limits.......................................................................... 27
Operational Checks - PKU0155 ............................................. 28
Siphon System - PKU0155..................................................... 28
Water Level - PKU0155 ......................................................... 28
Water Level Check - PKU0155 Only ...................................... 29
Ice Thickness Check - PKU0155............................................. 29
Minimum/Maximum Slab Weights ..........................................30
Section 3
Cleaning and Sanitation
Descaling and Sanitizing ..........................................................31
General ................................................................................. 31
Detailed Descaling and Sanitizing Procedure........................ 31
Remedial Descaling Procedure ............................................. 32
Exterior Cleaning................................................................... 32
Ice Machine Inspection......................................................... 32
Door Removal PKM0335/PKM0425/PKM0535 ........................32
Detailed Descaling and Sanitizing Procedure............................33
Sanitizing Procedure ............................................................. 34
Part Removal for Detailed Descaling/Sanitizing .......................36
PKM0335/PKM0425/PKM0535 Part Removal ...................... 36
PKU0155 Part Removal ......................................................... 37
Remedial Descaling Procedure.................................................40
Cleaning the Condenser Filter..................................................41
Cleaning the Condenser...........................................................41
Removal from Service/Winterization.......................................41

Part Number: 000016426 Rev 00 08/2020 9
Table of Contents (continued)
Section 4
Before Calling For Service
Checklist..................................................................................43
Safety Limit Feature................................................................. 45

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Part Number: 000016426 Rev 00 08/2020 11
Model Numbers
This manual covers the following models:
• PKU0155SA - Small Cube, Air-cooled, Undercounter Model
• PKU0155FA - Full Cube, Air-cooled, Undercounter Model
• PKM0335SA - Small Cube, Air-cooled, Modular Model
• PKM0335FA - Full Cube, Air-cooled, Modular Model
• PKM0425SA - Small Cube, Air-cooled, Modular Model
• PKM0425FA - Full Cube, Air-cooled, Modular Model
• PKM0535SA - Small Cube, Air-cooled, Modular Model
• PKM0535FA - Full Cube, Air-cooled, Modular Model
• PKB0425 - 22" Wide Modular Bin
• PKB0535 - 30" Wide Modular Bin
Ice Deflector
An ice deflector is required when the ice machine is installed on a dispenser.
Bin Installation
• Bins have a deflector installed and require no modifications when used with a forward
facing evaporator.
• Install legs by threading into base of bin.
• Align sides and back of ice machine with sides and back of bin, when placing ice
machine on bin.
• Install separate drain for bin and ice machine see “Drain Connections” on page 18.
NOTE: These products are hermetically sealed and contain fluorinated greenhouse gas
R410A.
Section 1
Installation Instructions

12 Part Number: 000016426 Rev 00 08/2020
Installation Instructions Section 1
Location of Ice Machine
The location selected for the ice machine must meet the following criteria. If any of these
criteria are not met, select another location.
• The location must be free of airborne and other contaminants.
• The air temperature must be at least 40°F (4°C), but must not exceed 110°F (43.4°C).
• The location must not be near heat-generating (ovens, dishwashers, etc.) equipment or
in direct sunlight and must be protected from weather.
• The location must not obstruct airflow through or around the ice machine. Refer to the
clearance requirements chart.
Clearance Requirements
PKU0155 Top and Sides 5" (13 cm) Back 5" (13 cm)
PKM0335 Top and Sides 8" (20 cm) Back 5" (13 cm)
PKM0425 and PKM0535 Top and Sides 8" (20 cm) Back 5" (13 cm)
Do not obstruct ice machine vents or openings.
Notice
The ice machine must be protected if it will be subjected to temperatures below
32°F (0°C). Failure caused by exposure to freezing temperatures is not covered by the
warranty.
Ice Machine Heat of Rejection
Series
Ice Machine
Heat of Rejection 1
Air Conditioning 2Peak
PKU0155 2200 2600
PKM0335 4600 5450
PKM0425 5400 6300
PKM0535 5300 6100
1 B.T.U./Hour
2 Because the heat of rejection varies during the ice making cycle, the figure shown is an average.
Ice machines, like other refrigeration equipment, reject heat through the condenser.
It is helpful to know the amount of heat rejected by the ice machine when sizing air
conditioning equipment where self-contained air-cooled ice machines are installed.

Part Number: 000016426 Rev 00 08/2020 13
Section 1 Installation Instructions
Ice Storage Bin Installation
nWarning
To avoid instability, the equipment must be installed in an area capable of supporting
the weight of the ice machine and a full bin of ice (30" models 750 lbs [340 kg]). The bin
and must be level side-to-side and front-to-back before installing the ice machine.
1. Remove threaded plug from drain fitting.
2. Screw the leveling legs onto the bottom of the bin.
3. Screw the foot of each leg in as far as possible. The legs must be screwed in tightly to
prevent them from bending.
4. Move the bin into its final position.
5. Level the bin to assure that the bin door closes and seals and the ice machine
operates properly. Use a level on top of the bin. Turn the base of each foot as
necessary to level the bin.
6. Inspect bin gasket prior to ice machine installation.
7. Remove all panels from ice machine before lifting and installing on bin. Remove front
panel, top cover, left and right side panels.
8. Install a separate bin drain refer to “Drain Connections” on page 18 for drain
requirements.

14 Part Number: 000016426 Rev 00 08/2020
Installation Instructions Section 1
Dispenser Installation
Observe the following recommendations unless required by the dispenser manufacturer.
• An adapter is not required for ice machines that match the dispenser size.
• A deflector is required for dispensers.
• Ice level management is recommended to prevent water leakage or movement of ice
machine during agitation.
• Align sides and back of ice machine with sides and back of dispenser when placing ice
machine.
• Follow ice machine installation procedures in this manual and any additional installation
requirements specified by the dispenser manufacturer.
Air Gap
A greater than 1-inch (25 mm) air gap is built into the ice machine for back-flow
prevention. This air gap exceeds NSF 12 requirements for back-flow prevention.
This air gap is greater than 1" (25 mm)

Part Number: 000016426 Rev 00 08/2020 15
Section 1 Installation Instructions
Electrical Service
nWarning
All electrical work, including wire routing and grounding must conform to all applicable
national and local electrical codes.
Minimum Circuit Ampacity
The minimum circuit ampacity is used to help select the wire size of the electrical supply.
(Minimum circuit ampacity is not the ice machine’s running amp load.)
Electrical Requirements
Refer to Ice Machine Model/Serial Plate for voltage/amperage specifications.
• A separate fuse/circuit breaker must be provided for each ice machine. Circuit breakers
must be H.A.C.R. rated in U.S.A.
• The wire size (or gauge) is dependent upon location, materials used, length of run, etc.,
so it must be determined by a qualified electrician.
• The ice machine must be grounded. Check all green ground screws in the control box
and verify they are tight before starting the ice machine.
• The maximum allowable voltage variation is ±10% of the rated voltage at ice machine
start-up (when the electrical load is highest).
Notice
Observe correct polarity of incoming line voltage. Incorrect polarity can lead to erratic
ice machine operation. Operate equipment only on the type of electricity indicated on
the specification plate.

16 Part Number: 000016426 Rev 00 08/2020
Installation Instructions Section 1
GROUND FAULT CIRCUIT INTERRUPTER
Ground Fault Circuit Interrupter (GFCI/GFI) protection is a system that shuts down the
electric circuit (opens it) when it senses an unexpected loss of power, presumably to
ground. GFCI/GFI circuit protection is not recommended with our equipment. If code
requires the use of a GFCI/GFI, then you must follow the local code. The circuit must be
dedicated and sized properly, and there must be a panel GFCI/GFI breaker. We do not
recommend GFCI/GFI outlets as they are known for more intermittent nuisance trips than
panel breakers.
MINIMUM POWER CORD SPECIFICATIONS
Maximum Breaker Size Minimum Wire
Size
Maximum Length of Power
Cord
15 amp 14 gauge 6 feet (1.83 m)
20 amp 12 gauge 6 feet (1.83 m)
If a power cord is used, the wire size to the receptacle is dependent upon location,
materials used, length of run, etc., so it must be determined by a qualified electrician.
Local, state or national requirements will supersede our minimum requirements.
Maximum Breaker Size & Minimum Circuit Amperage Chart
Important
Due to continuous improvements, this information is for reference only. Please refer
to the ice machine serial number tag to verify electrical data. Serial tag information
overrides information listed on this page.
Ice Machine Voltage/Phase/
Cycle
Maximum Fuse
or
Circuit Breaker
Minimum Circuit
Amps Total Amps
PKU0155 115/1/60 15 N/A 7.4
PKM0335 115/1/60 15 9.44 N/A
PKM0425 115/1/60 20 11.3 N/A
PKM0535 115/1/60 20 12.7 N/A

Part Number: 000016426 Rev 00 08/2020 17
Section 1 Installation Instructions
Water Supply and Drain Requirements
Water Supply
Local water conditions may require treatment of the water to inhibit scale formation, filter
sediment, and remove chlorine odor and taste.
nWarning
Connect to a potable water supply only. Plumbing must conform to state, local and
national codes.
WATER INLET LINES
Follow these guidelines to install water inlet lines:
• If you are installing a water filter system, refer to the installation instructions supplied
with the filter system for ice making water inlet connections.
• Do not connect the ice machine to a hot water supply. Be sure all hot water restrictors
installed for other equipment are working. (For example: check valves on sink faucets,
dishwashers, etc.)
• If water pressure exceeds the maximum recommended pressure of 80 psi (552 kPa),
obtain a water pressure regulator from your local plumbing supplier.
• Install a water shut-off valve for both the ice making and condenser water lines.
• Insulate water inlet lines to prevent condensation.
Notice
Do not apply heat to water valve inlet fitting. This will damage plastic water inlet
connection.

18 Part Number: 000016426 Rev 00 08/2020
Installation Instructions Section 1
DRAIN CONNECTIONS
Follow these guidelines when installing drain lines to prevent drain water from flowing
back into the ice machine and storage bin:
• Drain lines must have a 1.5 inch drop per 5 feet of run (2.5 cm per meter), and must not
create traps.
• The floor drain must be large enough to accommodate drainage from all drains.
• Run separate bin and ice machine drain lines. Insulate them to prevent condensation.
• Vent the bin and ice machine drain to the atmosphere.
• Bin drain termination must have an air gap.
AUXILIARY BASE DRAIN INSTALLATION
An auxiliary drain is located in the ice machine base to remove moisture in high humidity
areas.
1. View the back of the ice machine base on the compressor side and locate and remove
the cap plug.
2. Route tubing to an open site drain:
• Use 1/2 inch CPVC tubing.
• Apply a bead of silicone around the exterior of the ice machine tubing and insert
into ice machine base. The silicone will secure the tubing and provide a watertight
seal.
3. Provide support for tubing.

Part Number: 000016426 Rev 00 08/2020 19
Section 1 Installation Instructions
Water Supply and Drain Line Sizing/Connections
Location Water
Temperature Water Pressure Ice Machine Fitting Tubing Size Up to Ice
Machine Fitting
Ice Making
Water Inlet
40°F (4°C)
Min.
90°F (32°C)
Max.
20 psi (140 kPa)
Min.
80 psi (552 kPa)
Max.
3/8" Female Pipe
Thread
3/8" min. inside
diameter
Ice Making
Water Drain – – 1/2" Female Pipe
Thread
1/2" min. inside
diameter
Bin Drain
PKM0335
PKM0425
PKM0535
– – 3/4" Female Pipe
Thread
3/4" min. inside
diameter
Bin Drain
PKU0155
1/2” Female Pipe
Thread
1/2” min. inside
diameter

20 Part Number: 000016426 Rev 00 08/2020
Installation Instructions Section 1
Installation Check List
 Is the toggle switch set to ice? (The toggle switch is located behind the front panel).
 Is the Ice Machine level?
 PKU0155 only - Is the float valve shut-off in the open position?
 Have all of the electrical and water connections been made?
 Has the supply voltage been tested and checked against the rating on the nameplate?
 Is there proper clearance around the ice machine for air circulation?
 Is the ice machine grounded and polarity correct?
 Has the ice machine been installed where ambient temperatures will remain in the
range of 40° - 110°F (4° - 43°C)?
 Has the ice machine been installed where the incoming water temperature will remain
in the range of 40° - 90°F (4° - 32°C)?
 Is there a separate drain for the potable water and bin?
 Are the ice machine and bin drains vented?
 Are all refrigerant lines free from contact with other components?
 Are all electrical leads free from contact with refrigeration lines and moving
equipment?
 Has the owner/operator been instructed regarding maintenance and the use of
Descaler and Sanitizer?
 Has the ice machine and bin been sanitized?
 Is the ice thickness set correctly? (Refer to Operational Checks to check/set the correct
ice bridge thickness).