Manitowoc RFP Series Technician's Handbook

Flake & nugget models

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Flake & Nugget Models

RFP/UFP/RNP/UNP Ice Machines

Technician's Handbook

Part Number STH108 6/21

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Summary of Contents for Manitowoc RFP Series

Page 1 Flake & Nugget Models RFP/UFP/RNP/UNP Ice Machines Technician’s Handbook Part Number STH108 6/21...
Page 3 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.
Page 4 Warning 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.
Page 5 Warning 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.
Page 6 Warning Follow these precautions to prevent personal injury while operating or maintaining this equipment. • Legs must be installed and the legs must be screwed in completely. • 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).
Page 7 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.
Page 8 Warning When installing, using, or servicing this equipment, follow these flammable refrigeration system requirements. (Continued) • This equipment cannot be installed in a corridor or hallway of a public building. • Equipment installation must comply with local sanitation and fire regulations. •...
Page 9 Nugget Air & Water-Cooled Models . . . . . . . . . . .13 Manitowoc Cleaner/Descaler and Sanitizer . . . . . . . 13 Ice Machine Heat of Rejection .
Page 10 Sequence of Operation Ice Making Sequence of Operation . . . . . . . . . . . . . . . 33 UFP0200/UFP0350/UNP0200/UNP0300 Operation .
Page 11 Component Specifications Bin Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . .59 Low Temperature Thermostat Evaporator safety thermostat .
Page 12 Diagrams Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Flake Models .
Page 13 RNP1100W Manitowoc Cleaner/Descaler and Sanitizer Manitowoc Ice Machine Cleaner/Descaler and Sanitizer are available in 16 oz. (473 ml) bottles. These are the only descaler and sanitizer approved for use with Manitowoc products. Cleaner/Descaler Part Number Sanitizer Part Number 16 oz.
Page 14 Ice Machine Heat of Rejection Series Ice Machine Heat of Rejection BTU/Hour UFP0200 - RFP0320 2400 UNP0200 2800 UNP0300 - UFP0350 5000 RNP0320 3075 RFP0620 - RNP0620 5200 RNP1100 7500 Part Number STH108 6/21...
Page 15 REGISTRATION Model/Serial Number These numbers are required when requesting information from your local Manitowoc Distributor, or Manitowoc Ice. The model and serial number are listed on the MODEL/ SERIAL NUMBER DECAL affixed to the ice machine. Part Number STH108 6/21...
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Page 17 Installation Installation Requirements The location selected for the ice machine must meet the following criteria. If any of these criteria are not met, select another location. • Air temperature - Minimum 50°F (10°C), Maximum 110°F (43°C) • The location must be free of airborne and other contaminants.
Page 18 Potable Water Requirements • Plumbing must conform to local codes. • Water temperature: Minimum 37°F (3°C), Maximum 90°F (32°C). • Do not connect the ice machine to a hot water supply. Be sure all hot water restrictors installed for other equipment are working.
Page 19 Ice Machine Clearance Requirements All Models Clearance Requirements Back 5” (12.7 cm) Sides/Top 8” (20.3 cm) RCUF Units Remote Condensing Unit Front/Back 24” (61.0 cm) Sides/Top 6” (15.2 cm) 24 inches clearance on top and sides is recommended for serviceability NOTE: Allowance must be made for removal when the ice machine is built-in.
Page 20 Electrical Service Warning All wiring must conform to local, state and national codes. VOLTAGE The maximum allowable voltage variation is ± 10% of the rated voltage on the ice machine model/serial number plate at compressor start-up. FUSE/CIRCUIT BREAKER A separate fuse/circuit breaker must be provided for each ice machine.
Page 21 Maximum Breaker/Minimum Circuit Amperage Chart NOTE: Due to continuous improvements, this information is for reference only. Please refer to the ice machine serial number tag to verify electrical data. Model/Serial tag information overrides information listed on these pages. RFP/RNP/UFP/UNP AIR-COOLED MODELS Air-Cooled Voltage Series Ice...
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Page 23 Maintenance procedures covered in this manual are not covered by the warranty. Caution Use only Manitowoc approved Ice Machine Cleaner/ Descaler (part number 000000084) and Sanitizer (part number 9405653). Do not mix Cleaner/Descaler and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.
Page 24 Detailed Descaling and Sanitizing Procedure Use Ice Machine Cleaner/Descaler part number 000000084. Use Ice Machine Sanitizer part number 9405653. Remove front and top covers and set the toggle Step 1 switch to the OFF position. Remove all ice from the bin. Step 2 Turn off the ice making water supply and drain Step 3...
Page 25 Move the toggle switch to the ON position. The Step 7 ice machine will make ice with the descaling solution and deposit the ice in the bin. Add the remaining descaler/ water solution as the water level in the reservoir drops. NOTE: Do not allow the descaler/water solution level to drop below the minimum water level.
Page 26 Hand descale the removed part(s) in a properly mixed solution of descaler and water. Solution Type Water Mixed With Descaling 1 gal. (4 L) 16 oz (500 ml) Cleaner/Descaler Part Number 000000084 Use a soft-bristle brush or sponge (NOT a wire brush) to carefully clean the parts.
Page 27 Reassemble all components removed in step 10 Step 11 into the ice machine. Refer to chart and premix water and sanitizer. Step 12 Amount of Water Amount of Sanitizer 1 Gallons (4 L) Water 1/2 ounce (15 ml) Fill the evaporator and reservoir with sanitizer/ Step 13 water solution.
Page 28 Remedial Cleaning Procedure for Heavily Scaled Ice Machines Perform this procedure if you have some or all of these symptoms. • Excessive grinding, popping or squealing noises from the evaporator • Grinding noise from gearbox • Ice machine trips speed sensor NOTE: A Cleaning/Sanitizing Procedure must be performed after this procedure.
Page 29 Refer to chart and premix cleaner/descaler Step 5 with lukewarm water in a non-metallic container. Model Water Mix Cleaner/Descaler and Reservoir Water Capacity Use Ice machine cleaner/ descaler, part number 000000084 only Cleaner Water UNP0200 UFP0200 14 oz (400 ml) 9 oz (266 ml) 5 oz (148 ml) UFP0350...
Page 30 CLEANING THE AIR FILTER AND CONDENSER Warning Disconnect electric power to the ice machine at the electric service switch before cleaning the condenser. The condenser fins are sharp. Use care when cleaning them. Air-Cooled Condenser Clean the condenser at least every six months. Follow the steps below.
Page 31 Removal from Service/Winterization Caution If water is allowed to remain in the ice machine in freezing temperatures, severe damage to some components could result. Damage of this nature is not covered by the warranty. Follow the procedure below. 1. Disconnect the electric power at the circuit breaker or the electric service switch.
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Page 33 Sequence of Operation Ice Making Sequence of Operation NOTE: Flake ice machines use an auger to remove ice from the evaporator. Occasional noises (creaks, groans, squeaks, or pops) are a normal part of the ice making process. UFP0200/UFP0350/UNP0200/UNP0300 OPERATION The ice machine will not start until: The rocker switch is moved to “ON”.
Page 34 RNP0620/RFP0620/RNP1100 OPERATION When the toggle switch is placed in the ON position the following controls must be in the closed position before the ice machine will start: Bin Thermostat High Pressure Cut-out Switch Ice Chute Safety Switch Low Pressure Switch Low Water Level Switch Placing the toggle switch in the ON position starts the gear motor.
Page 35 Ice Production/Quality Check QUALITY CHECK Ice quality varies with ambient and water temperatures, and is measured by the amount of water in the ice. Generally speaking, higher incoming water temperature results in lower ice quality. Lower water temperature results in higher ice quality. ICE PRODUCTION CHECK NOTE: Ice production checks that are within 10% of the charted capacity are considered normal due to variances...
Page 36 Thermostat Settings Bin Thermostat: The bin thermostat sensing bulb is located in the ice chute on modular models and in the bin thermostat holder on the right side of the bin on self storage models. The bin thermostat turns the ice machine on and off as the level of ice in the bin changes.
Page 37 Thermostat Setting Chart NOTE: Settings are for reference only. Factory setting is indicated on control label and overrides information listed on this page. Model Bin Thermostat Evaporator Setting Thermostat Setting UNP0200 UFP0200 UNP0300 RFP0320 RNP0320 UFP0350 RNP0620 RFP0620 RNP1100 Part Number STH108 6/21...
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Page 39 Troubleshooting Diagnostic troubleshooting for the ice machine involves following flowcharts that are dependent on symptoms of the failed machine. Follow the flowcharts for the failure symptom and model you are working on. NOTE: Refer to the sequence of operation to determine where in the sequence the ice machine has failed.
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Page 45 RFP0320/RNP0320 Troubleshooting SELF-CONTAINED AIR-COOLED When the toggle switch is placed in the “ON” position the following controls must be in the closed position before the ice machine will start: Bin Thermostat Ice Chute Safety Switch Low Water Level Switch High Pressure Cut-out Switch Low Pressure Cut-Out Switch Placing the toggle switch in the ON position starts the gear motor and an 8 minute compressor time delay.
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Page 51 RFP0620/RNP0620/RNP1100 Troubleshooting SELF-CONTAINED AIR-COOLED Normal Operation When the toggle switch is placed in the ON position the following controls must be in the closed position before the ice machine will start: Bin Thermostat High Pressure Cut-out Switch Ice Chute Safety Switch Low Pressure Switch Low Water Level Switch NOTE: Placing the toggle switch in the ON position starts...
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Page 59 Component Specifications BIN THERMOSTAT Model Setting Cut-Out Cut-In UFP0200 / UNP0200 37°F ±1 43°F ±1 UNP0300 / UFP0350 3°C ±.1 6°C ±.1 RFP0320 / RNP0320 35°F ±1 41°F ±1 RFP0620 / RNP0620 1.6°C ±.1 5.0°C ±.1 RNP1100 LOW TEMPERATURE THERMOSTAT EVAPORATOR SAFETY THERMOSTAT Model Setting...
Page 60 FAN CYCLE CONTROL Model Cut-Out (Open) Cut-In (Close) UFP0200 / UNP0200 UNP0300 / RNP0320 215 ±5 232 ±5 RFP0320 / UFP0350 (14.8 bar ±.3) (16 bar ±.3) RNP0620 / RFP0620 RNP1100 Part Number STH108 6/21...
Page 61 ROTATION SENSOR RFP0620 / RNP0620 / RNP1100 Light Definition Yellow Blinking Time Delay Period Yellow Solid Normal Operation Sensing Red Blinking 2 Time Delay Period - First 1 To 7 Faults Flashes Per Second Red Solid Lockout - 8 Consecutive Faults Due To A Speed Fault Remove/Restore Power To Reset Red Blinking Slowly...
Page 62 TOTAL SYSTEM REFRIGERANT CHARGE This information is for reference only. Model/Serial plate information overrides information listed in this table. Model Refrigerant Charge Flake Models UFP0200A 100 Grams UFP0350A 148 Grams RFP0320A 148 Grams RFP0620A 140 Grams RFP0620W 148 Grams Nugget Models UNP0200A 100 Grams UNP0300A...
Page 63 FILTER-DRIERS The size of the filter-drier is important. The refrigerant charge is critical. Using an improperly sized filter-drier will cause the ice machine to be improperly charged with refrigerant. Important Driers are covered as a warranty part. The drier must be replaced any time the system is opened for repairs.
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Page 65 Charts Ice Production & Refrigerant Temperature These charts are used as guidelines to verify correct ice machine operation. Accurate collection of data is essential to obtain the correct diagnosis. • Zero out manifold gauge set before obtaining temperature readings to avoid mis-diagnosis. •...
Page 66 Flake Models UFP200A SELF CONTAINED AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 hour Water Temperature Ice Production 70°F/50°F 257 lbs 21°C/10°C 116 kgs 90°F/70°F 198 lbs 32°C/21°C 90 kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Entering Discharge...
Page 67 RFP0320A SELF CONTAINED AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 hour Water Temperature Ice Production 70°F/50°F 370 lbs 21°C/10°C 168 kgs 90°F/70°F 286 lbs 32°C/21°C 130 kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Entering Discharge Suction...
Page 68 UFP0350A SELF CONTAINED AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 hour Water Temperature Ice Production 70°F/50°F 398 lbs 21°C/10°C 181 kgs 90°F/70°F 328 lbs 32°C/21°C 149 kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Entering Discharge Suction...
Page 69 RFP0620A SELF CONTAINED AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 hour Water Temperature Ice Production 70°F/50°F 747 lbs 21°C/10°C 339 kgs 90°F/70°F 506 lbs 32°C/21°C 230kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Entering Discharge Suction Condenser...
Page 70 RFP0620W SELF CONTAINED WATER-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 hour Water Temperature Ice Production 70°F/50°F 676 lbs 21°C/10°C 307 kgs 90°F/70°F 660 lbs 32°C/21°C 299 kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Entering Discharge Suction...
Page 71 Nugget Models UNP0200A SELF STORAGE AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 hour Water Temperature Ice Production 70°F/50°F 231 lbs 21°C/10°C 97 kgs 90°F/70°F 164 lbs 32°C/21°C 74 kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Entering Discharge...
Page 72 UNP0300A SELF STORAGE AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 hour Water Temperature Ice Production 70°F/50°F 330 lbs 21°C/10°C 150 kgs 90°F/70°F 275 lbs 32°C/21°C 125 kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Entering Discharge Suction...
Page 73 RNP0320A SELF CONTAINED AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 hour Water Temperature Ice Production 70°F/50°F 308 lbs 21°C/10°C 140 kgs 90°F/70°F 236 lbs 32°C/21°C 107 kgs OPERATING TEMPERATURES 8 Air Temperature Freeze Cycle Entering Discharge Suction...
Page 74 RNP0620A SELF CONTAINED AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 Hour Water Temperature Ice Production 70°F/50°F 591 lbs 21°C/10°C 268 kgs 90°F/70°F 451 lbs 32°C/21°C 204 kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Around Ice Discharge Suction...
Page 75 RNP0620W WATER-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 Hour Water Temperature Ice Production 70°F/50°F 598 lbs 21°C/10°C 271 kgs 90°F/70°F 583 lbs 32°C/21°C 264 kgs OPERATING TEMPERATURES * Air Temperature Around Freeze Cycle Ice Machine Discharge Suction °F/°C...
Page 76 RNP1100A AIR-COOLED Characteristics vary depending on operating conditions. ICE PRODUCTION * Air Temperature 24 Hour Water Temperature Ice Production 70°F/50°F 1078 lbs 21°C/10°C 489 kgs 90°F/70°F 825 lbs 32°C/21°C 374 kgs OPERATING TEMPERATURES * Air Temperature Freeze Cycle Around Ice Discharge Suction Machine...
Page 77 Diagrams Wiring Diagrams The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the ice machine you are servicing. Warning Always disconnect power before working on electrical circuitry. Part Number STH108 6/21...
Page 78 Flake Models UFP0200A/UFP350A AIR-COOLED Refer to Nameplate for Voltage Rating 241177_03.1 See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 79 Wiring Diagram Legend UFP0200A/UFP0350A Air-cooled Gear motor Compressor Condenser fan motor Water inlet valve Low water level safety Bin thermostat Fan cycle control Contactor Water level switch Chute Safety switch High Pressure Safety Switch On/Off Switch Compressor Delay Timer Low pressure safety switch Compressor Time Delay Bypass Wire Color Designation White...
Page 80 RFP0320A AIR-COOLED Refer to Nameplate for Voltage Rating 241289_01 See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 81 Wiring Diagram Legend RFP0320A Air-cooled Gear motor Compressor Fan motor Water inlet valve Evaporator Safety Thermostat Low water level switch Bin thermostat Fan cycle control Contactor Water level switch Chute safety switch High pressure safety switch On/Off switch Compressor time delay Compressor time delay by-pass Wire Color Designation White...
Page 82 RFP0620A AIR-COOLED Refer to Nameplate for Voltage Rating 241182_01.1 See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 83 Wiring Diagram Legend RFP0620A Air-cooled Gear motor Compressor Fan motor Water inlet valve Low water level switch Bin thermostat Fan cycle control Contactor Water level switch Chute safety switch High pressure safety switch On/Off switch Low pressure safety switch Rotation sensor Compressor time delay by-pass Wire Color Designation White...
Page 84 RFP0620W WATER-COOLED Refer to Nameplate for Voltage Rating BU BK BN 241182_01.1wc See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 85 Wiring Diagram Legend RFP0620W Water-cooled Gear motor Compressor Water inlet valve Low water level switch Bin thermostat Contactor Water level switch Chute safety switch High pressure safety switch On/Off switch Low pressure safety switch Rotation sensor Compressor time delay by-pass Wire Color Designation White Blue...
Page 86 Nugget Models UNP0200A/UNP0300A AIR-COOLED Refer to Nameplate for Voltage Rating 24683_05 See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 87 Wiring Diagram Legend UNP0200A/UNP0300A Air-cooled Gear Motor Compressor Condenser fan motor Water Inlet valve Evaporator low temperature safety thermostat Low water level safety Bin thermostat High temperature limit (snap disc) Fan cycle control Contactor Water level switch Compressor relay On/Off switch Wire Color Designation White Blue...
Page 88 RNP0320A AIR-COOLED Refer to Nameplate for Voltage Rating 241289_01 See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 89 Wiring Diagram Legend RNP0320A Air-cooled Gear Motor Compressor Condenser fan motor Water inlet valve Evaporator low temperature safety thermostat Low water level safety Bin thermostat Fan cycle control Contactor Water level switch Ice chute safety switch High pressure cut out On/Off switch Compressor time delay Compressor time delay by-pass...
Page 90 RNP0620A AIR-COOLED Refer to Nameplate for Voltage Rating BK BN 241182_01 See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 91 Wiring Diagram Legend RNP0620A Air-cooled Gear Motor Compressor Water inlet valve Low water level safety Bin thermostat Fan cycle control Contactor Water level switch Ice chute safety switch High pressure cut out On/Off switch Low pressure cut out Rotation sensor Compressor time delay by-pass Wire Color Designation White...
Page 92 RNP0620W WATER-COOLED Refer to Nameplate for Voltage Rating 241182_01wc See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 93 Wiring Diagram Legend RNP0620W Water-cooled Gear Motor Compressor Water inlet valve Low water level safety Bin thermostat Contactor Water level switch Ice chute safety switch High pressure cut out On/Off switch Low pressure cut out Rotation sensor Compressor time delay by-pass Wire Color Designation White Blue...
Page 94 RNP1100A AIR-COOLED Refer to Nameplate for Voltage Rating 241198_01 See page 96 for compressor start component wiring. Part Number STH108 6/21...
Page 95 Wiring Diagram Legend RNP1100A Air-cooled Gear Motor Compressor Condenser fan motor Water inlet valve Low water level safety Bin thermostat Fan cycle control Contactor Water level switch Ice chute safety switch High pressure cut out On/Off switch Low pressure cut out Rotation sensor Compressor time delay by-pass Solenoid...
Page 96 Compressor Start Component Wiring UFP0200/UNP0200 UNP0300/RFP0320/UFP0350/UNP0350/RFP0620 (YEL) (YEL) Part Number STH108 6/21...
Page 97 RFP0620/RNP0620/RNP1100 Part Number STH108 6/21...
Page 98 Refrigeration Tubing Schematics UNP0200/UFP0350 AIR-COOLED Tubing Diagram Legend Compressor Condenser Liquid Line Drier Capillary tube Accumulator Heat Exchanger Evaporator Part Number STH108 6/21...
Page 99 RFP0320 AIR-COOLED Tubing Diagram Legend Compressor Condenser Liquid Line Drier Heat Exchanger Automatic Expansion Valve Evaporator Part Number STH108 6/21...
Page 100 RFP0620 AIR AND WATER-COOLED Tubing Diagram Legend Compressor Condenser (Air or Water-cooled) Liquid Line Drier Liquid Line Solenoid Valve Suction Accumulator Thermostatic Expansion Valve Liquid Accumulator Evaporator Part Number STH108 6/21...
Page 101 RNP1100 AIR AND WATER-COOLED Tubing Diagram Legend Compressor Condenser Liquid Line Drier Liquid Line Solenoid Valve Suction Accumulator Thermostatic Expansion Valve Liquid Accumulator Evaporator Part Number STH108 6/21...
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Page 104 MANITOWOC ICE 2110 SOUTH 26TH STREET MANITOWOC, WI 54220 800-545-5720 WWW.MANITOWOCICE.COM ©2021 Manitowoc Ice Inc. except where explicitly stated. All rights reserved. Part Number STH108 6/21...

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