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OPERATOR’S MANUAL with Illustrated Parts List High Capacity Twin Twist Soft Serve Freezer Model 959R 184981 - 11/13 H.C. Duke & Son, LLC P/N 184981 November 2013 Printed in U.S.A.
Follow these four steps to safety ..1. Recognize Safety Information ..Look for this safety alert symbol throughout this manual. When you see this symbol on your 959R or in this manual, be alert to the potential for personal injury. Follow recommended precautions and safe operating practices.
The safety decals must remain in place and legible for the life of the 959R. If you need new decals, use the information and illustrations on pages iv and v of this manual to identify the decal and order replacements.
DUKE Model 959R Soft Serve Freezer Safety Decal Locations Do not attempt to operate the freezer You may contact H. C. Duke & Son, LLC, until all safety precautions and operating Service Department at instructions in this manual are read and understood.
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DUKE Model 959R Soft Serve Freezer Safety Decal Locations 184981...
DUKE Model 959R Soft Serve Freezer TABLE OF CONTENTS SAFETY ....................... ii SAFETY DECAL LOCATIONS ................iv PART 1 INTRODUCTION ..................1 NOTE TO INSTALLER ................1 Uncrating and Inspection............. 2 Installation .................. 3 Electrical Requirements .............. 3 Electrical Connections ..............4 SPECIFICATIONS ..................
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10.7 Overrun Adjustment ..............32 10.8 Rerun 32 ROUTINE MAINTENANCE ..............33 TROUBLESHOOTING TABLES ............. 37 PART II MODEL 959R REPLACEMENT PARTS w/ ILLUSTRATIONS ..........* *Refer to Part II Table of Contents for help with locating part numbers and illustrations. 184981...
DUKE Model 959R Soft Serve Freezer Introduction The 959R Freezer is designed to If you require technical assistance, please produce DQ soft serve ice cream or DQ contact your local H.C. Duke & Son frozen yogurt, with a product serving service company: temperature of 18 to 19ºF (-8 to -7ºC).
DUKE Model 959R Soft Serve Freezer 2.1 Uncrating and Inspection CAUTION Be sure to properly support the machine when removing bolts and installing legs or casters. When the unit is received and while 1. Remove the carton from the pallet,...
DUKE Model 959R Soft Serve Freezer Installation CAUTION are tied together so that one water All materials and connections inlet and one water waste are all must conform to local that is required. The connections requirements and be in are found on the back panel and are compliance with the National clearly tagged - “Water Inlet”...
DUKE Model 959R Soft Serve Freezer Electrical Connections 4. Electrical connections are made in CAUTION the junction box(es) located mid-level To prevent accidental electrical behind the back panel. shock, a positive earth ground 5. Use a flexible connection when is required.
DUKE Model 959R Soft Serve Freezer Specifications Particulars Always check and verify voltage and amperage on the data plate located on the back panel of each freezer. MODEL 959R Width-in./cm 16/40.6 Refrigerant 404a Height-in./cm 58/147.3 Charge (Water Cooled) 3.75 Depth-in./cm 36/91.4...
Figure 3-2 Data Plate Reference Information Fill in the following information below as soon as you receive the 959R. (The item numbers—encircled, below—correspond with the callout numbers above.) IMPORTANT: Complete for reference: 1.) Model Number:___________________ 2.) Serial Number:___________________...
DUKE Model 959R Soft Serve Freezer Installation Date Fill in the date of installation, and the name, address, and phone number of the installer in the space provided below. This information will be needed when ordering parts or service for your freezer.
DUKE Model 959R Soft Serve Freezer Part Names and Functions Figure 4-1 Head Assembly 184981...
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DUKE Model 959R Soft Serve Freezer Part Names and Functions – continued The following descriptions apply to figure 4-1. The number preceding the part name corresponds to the number in the figure. HEAD: Encloses the freezing cylinder and provides an opening for product to be dispensed.
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DUKE Model 959R Soft Serve Freezer Part Names and Functions – continued Figure 4-2 Beater Shaft The following descriptions apply to figure 4-2. The number preceding the part name corresponds to the number in the figure. 1.) SHAFT - BEATER: Rotates in the 5.) WASHER - SHAFT SEAL: Holds the...
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– continued Accessory The part name and description below in figure 4-3 may be used with this freezer. Figure 4-3 Duke Remote Mix Transfer System (RMT) REMOTE MIX TRANSFER (RMT) SYSTEM with Shelf (Accessory) Transfers mix and air from cooler to the freezing cylinder.
DUKE Model 959R Soft Serve Freezer 5 Operator Controls Figure 5-1 The following paragraphs describe the CAUTION operator controls and indicators. Refer to Test operation of the head figure 5-1 for location of these controls switch prior to placing and indicators on the freezer.
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DUKE Model 959R Soft Serve Freezer Operator Controls – continued Pump Switch This two-position switch controls the operation of the mix pump located in the walk-in cooler. The pump must be plugged into the receptacle located on the back panel of the freezer.
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DUKE Model 959R Soft Serve Freezer Operator Controls – continued Pilot Lights (5) These lights indicate when the beater When the light is on: motor and compressor are operating Amber — this light indicates the together or independently. beater motor is operating.
DUKE Model 959R Soft Serve Freezer Disassembly and Cleaning Safety Information This freezer uses pressure to assure consistent product quality. It is important CAUTION for your safety that the freezer is To avoid electrical shock or depressurized slowly and completely...
DUKE Model 959R Soft Serve Freezer 6.1 Cleaning Accessories The following accessories shipped with the freezer are necessary for cleaning, sanitizing, and disassembly/assembly: 1. Brush, Cylinder 4 inch diameter: 5. Brush, 1/4 inch diameter with an used with 36in. handle to clean the overall length of 6-1/2 inches: used cylinder.
DUKE Model 959R Soft Serve Freezer 6.2 Disassembly Instructions Figure 6-2 Head Assembly CAUTION CAUTION To avoid electrical shock or Make sure freezer is contact with moving parts, depressurized before make sure all switches are proceeding. in the “OFF” position and that the main power supply is disconnected.
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DUKE Model 959R Soft Serve Freezer 6.2 Disassembly Instructions – continued 3. Remove the cylinder bushings and beater shafts from the cylinders. Then remove the scraper blades and shaft seals from the beater shafts. (See figure 6-3) Remove the drip tray and CUP SEAL insert.
DUKE Model 959R Soft Serve Freezer 6.3 Cleaning Instructions The cleaning instructions explained in NOTE: The sanitizer should be mixed this section are procedures to remove according to the manufacturer’s instruc- bacteria and maintain a clean, sanitary tions to yield 100 PPM available chlorine freezer.
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DUKE Model 959R Soft Serve Freezer Cleaning Instructions – continued the shaft cup seals, plastic washers, and o-rings (figure 6-6) c. any nozzles and extensions used, d. spigot and o-ring grooves (figure 6-6), e. the air bleed plug o-ring grooves the beater shaft and the scraper blade pin holes (figure 6-8).
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DUKE Model 959R Soft Serve Freezer Cleaning Instructions – continued b. brush both ends of the mix feed hose, c. the inside of the cylinders (see figure 6-10) making certain to clean the back walls d. the inside of the drain tube, as...
DUKE Model 959R Soft Serve Freezer Assembly Correct assembly of the freezer is Remove any excess lubricant from essential to prevent leakage of the the beater shaft. product and damage to the freezer. To Place the scraper blades on the...
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DUKE Model 959R Soft Serve Freezer Assembly – continued The bushing will slide on one way bushing is positioned on the beater shaft properly and lubricated. only. Operating the freezer with a missing 6. See figure 7-4. Install and lubricate or badly worn bushing will damage the the O-rings (3 &...
DUKE Model 959R Soft Serve Freezer Start-up Instructions CAUTION The pump will be pressurized during operation. Make sure all components and fasteners are secure before start-up. 8.1 Sanitizing or 38 to 43°C) to wash, rinse, and sanitize. Prepare 4 gallons (15.2...
DUKE Model 959R Soft Serve Freezer Sanitizing – continued IMPORTANT: 11. Slowly open and close the spigot ten DO NOT use the “AUTO” position with times. Slowly open the spigots and sanitizer in the cylinder. The freezer allow the pumps to push the sanitizer will be damaged.
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DUKE Model 959R Soft Serve Freezer 8.2 Priming – continued After the cylinders are pressurized 4. Open the spigots and air bleed plugs. and the pumps have cycled off, turn 5. Turn the pump switches to “ON” and the selector switches to “AUTO”.
DUKE Model 959R Soft Serve Freezer 8.3 Dispensing Product 5. For shakes, large sundaes, floats and 1. To dispense product, grasp the spigot handle, hold the container which is to other similar products, this practice be filled with product below the spigot,...
DUKE Model 959R Soft Serve Freezer Closing Procedures 9.1 Draining Product At the end of each day of operation, the freezer must be rinsed and disassembled. The parts must be washed, rinsed, sanitized, and prepared for reassembly. To remove frozen product from the 12.
DUKE Model 959R Soft Serve Freezer General Information 10.1 Dairy Queen ® 1. Standard approved Dairy Queen ® 5. Check both taste and smell of mix, weight is approximately 9.25 lbs. per and thoroughly stir or agitate mix prior gallon (1.1 kilograms per liter).
4. Strike off the excess product so it is graduated in overrun percentage can even with the top of the container and be purchased from H. C. Duke & Son. weigh. 5. Use the following formula to figure On the next page is an overrun...
DUKE Model 959R Soft Serve Freezer 10.7 Overrun Adjustment After the machine has run long enough After making an adjustment of the pump to dispense at least one full cylinder of to correct any overrun variation, allow product, you will have the overrun that...
DUKE Model 959R Soft Serve Freezer 11 Routine Maintenance H. C. Duke & Son, Inc. recommends the following schedule to help maintain your freezer in like- new operating condition, as well as help protect your investment. Take the time to learn and perform these routine procedures and receive in return many years of valuable service from your freezer.
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DUKE Model 959R Soft Serve Freezer Routine Maintenance – continued MONTHLY MONTHLY – continued 1. Test Head Switch If the beater drive coupling is turning, or you are unable to The head switch feature is designed to prevent determine whether or not the...
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DUKE Model 959R Soft Serve Freezer 11 Routine Maintenance – continued QUARTERLY ANNUALLY 1. Have a refrigeration technician check the refrigeration system and make the CAUTION necessary adjustments. To avoid electrical shock or contact with moving parts, make sure all switches are in the “OFF”...
(See your Illustrated Replacement Parts Manual) Should you have any questions on items that are not included in this maintenance schedule, or problems where service assistance is needed, please call H. C. Duke & Son,LLC. Service Department, for factory service assistance.
DUKE Model 959R Soft Serve Freezer Troubleshooting Charts THIS SAFETY ALERT SYMBOL IDENTIFIES IMPORTANT PERSONAL SAFETY MESSAGES IN THIS MANUAL. WHEN YOU SEE THIS SYMBOL, BE ALERT TO THE POSSIBILITY OF PERSONAL INJURY. DO NOT ATTEMPT TO CONTINUE UNTIL THE SAFETY PRECAUTIONS ARE THOROUGHLY UNDERSTOOD.
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DUKE Model 959R Soft Serve Freezer Troubleshooting Charts – continued PROBLEM PROBABLE CAUSE REMEDY Freezer unplugged. Plug in freezer. Make sure your freezer is connected to a separate circuit independent from Fuse or breaker blown at main any other electrical equipment. Have disconnect.
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DUKE Model 959R Soft Serve Freezer Troubleshooting Charts – continued PROBLEM PROBABLE CAUSE REMEDY MTS pressure too low. Contact your local service company. Check product temperature. Should be Product too cold. 18°F (-7.8°C). See Dispensed Product Product Too Hard. dispenses slowly out of Check air meter.
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DUKE Model 959R Soft Serve Freezer Troubleshooting Charts – continued PROBLEM PROBABLE CAUSE REMEDY Have condenser cleaned by your Dirty or blocked condenser, restricted air local service company; lower ambient flow – high ambient temperature. temperature. Thermostat cut-in point out of adjustment Contact your local service company.
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REPLACEMENT PARTS MANUAL With Illustrations TWIN TWIST QUALITY PARTS SOFT SERVE FREEZER PROTECT MODEL YOUR 959R EQUIPMENT 184981-01 - 11/13 eep your freezer in excellent condition lwAys contAct H. c. d uKe And on for replAcement pArts...
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The illustrations in this manual can be used as a reference for obtaining the correct part description and part number. All parts listed in the manual should be ordered through: H. C. Duke & Son, LLC 2116 - 8th Avenue...
DUKE Model 959R Soft Serve Freezer Figure 5 Electrical Box (Sheet 1 of 2) FRONT VIEW Use only original or authorized replacement parts with this freezer. Use of unapproved parts will void warranty. 184981-01...
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DUKE Model 959R Soft Serve Freezer Figure 5 Electrical Box (Sheet 1 of 2) Item Part No. Description 1 ....HC150074 ... Timer-DOM .5-3 SEC 24-240VAC 2 ....HC121113 ... Kit-Assy O.L. RF38 6.3-10 A (3 Phase) HC150069 ..Relay-Overload RF38 6.3-10A HC121090 ..
DUKE Model 959R Soft Serve Freezer Figure 7 Freezer Breakdown (Sheet 1 of 2) Use only original or authorized replacement parts with this freezer. Use of unapproved parts will void warranty. 184981-01...
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DUKE Model 959R Soft Serve Freezer Figure 7 Freezer Breakdown (Sheet 2 of 2) Use only original or authorized replacement parts with this freezer. Use of unapproved parts will void warranty. 184981-01...
DUKE Model 959R Soft Serve Freezer Figure 8 Gear Reducer HC153341-01 Gear Reducer 4CB Wintwin 10 - 1 Ratio A and B Side Item Part No. Description 1 ..HC153014 ..Bearing-High Speed Cup 3/4" ......2 ea. req. per side 2 ..HC153015 ..Bearing-High Speed Cone 3/4" ......2 ea. req. per side 3 ..HC153011 ..
HC158014A....Sanitizer-Stera Sheen 4lb. Jar HC158049 ....Scale-Overrun HC169374 ....Tool-O-Ring Removal HC184643 ....DVD-Training 919R, 929R & 959R HC196006 ....Tee-5/8 x 5/8 x 5/8 White PET (Plastic Hose Connection) HC196061 ....Tubing-.600ID x .850OD PVC (Mix Line-Std.) HC196062 ....Tubing-.600ID x .975OD PVC (Mix Line-H.D.) Use only original or authorized replacement parts with this freezer.
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DUKE Model 959R Soft Serve Freezer Notes: _____________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Use only original or authorized replacement parts with this freezer. Use of unapproved parts will void warranty.
Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER QTY (FROM – TO) Adapter-Star/Spigot (Optional)......HC137870 ..3 ..A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER (FROM – TO) Brush-9/16-inch Dia. w/36-inch Handle ....HC158077 ..1 ..A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER QTY (FROM – TO) Compressor-Assy.208-230/3/60 Kit .....HC120951 ..2 ..F2Q —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER (FROM – TO) Cover-Assy. Electric Box ........HC116357 ..1 ..A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER QTY (FROM – TO) Extension-Spigot ........HC136713 ..3 ..A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER (FROM – TO) Insert-Assy. Drip Tray ..........HC114735 ..1 ..A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER QTY (FROM – TO) Knob-Timer ..............HC162604 ..2 A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER (FROM – TO) ...........HC160114 ..* ..A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER QTY (FROM – TO) Button-OL Reset Adapter ......HC150150 ..2 ..A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER (FROM – TO) Screw-TRPM 1/4-20 x 1 SST ...HC159219 ..
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER QTY (FROM – TO) Switch-Toggle SPST .........HC159235 ..2 ..A2L-260 —...
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Twin Twist Soft Serve Freezer Model 959R Alphabetized Parts List for Model 959R Important: All parts shown are for standard models designed for 230V/1PH/60HZ or 203–230V/3PH/60HZ. PART PART SERIAL NUMBER DESCRIPTION NUMBER (FROM – TO) Valve-Solenoid 208-240v ........HC155421 ..2 ..A2L-260 —...
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