ND650 INTRODUCTION To the owner or user: The service manual you are reading is intended to provide you, and the maintenance or service technician with the information needed to install, start up, clean, maintain, and service this ice maker-dispenser. The ND650 is a combination nugget ice maker and countertop dispenser, with the option of wall mounting. A water station is standard.
ND650 FOR THE INSTALLER: Specifications Before beginning the installation, check that all the materials and kits required are available at the installation location. This ice maker-dispenser is designed to be mounted on a machine stand, or a countertop, or using wall mounting kit KWB3, hung from a wall. The sink may be retained, or removed and the optional longer splash panel (KSP1) installed in place of the original. Instructions for each kit are included in this service manual.
ND650 FOR THE INSTALLER: Environmental Limitations Installation Limitations air cooled models in a location where there is less This ice system is designed to be installed indoors, than 6" clearance to the left and right of the in a controlled environment. cabinet. Minimum Maximum 0 0 100 F. Air Temp 50 F. 1000F. Water Temp 400F.
ND650 FOR THE INSTALLER Location After uncrating and inspection, the unit is ready for installation. It is important that the machine be installed in a location where it has enough space above and behind it for service. Air cooled models require a minimum of 6 inches to the left and right of the machine for air circulation. Machine Stand Installation Tip the stand on it’s back and install the legs, return the stand to the upright position. Adjust leg levelers so that the stand does not "rock".
ND650 FOR THE INSTALLER: Wall Mount Kit /////////////////////////WARNING/////////////////////////////// It is recommended that the wall mounting installation be done by an experienced contractor. The weight of the machine when in use may exceed 350 pounds. The unit should be mounted on a solid, rigid wall with proper fasteners for that type of wall and of adequate strength to support the weight of the machine when in use.
ND650 FOR THE INSTALLER: Soda Valve Kit Installation Instructions Note: Carbonator and carbonated product cooling system are not included. //////////////////////////WARNING//////////////////////////// Disconnect electrical power to the icemaker dispenser. //////////////////////////////////////////////////////////////////////// 1. Remove cabinet top panel, front panel, and splash panel. 2. Remove screws and remove filler plate from the ice maker dispenser. 3.
ND650 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: The recommended water supply is clean, cold water. Use 3/8" O.D. copper tubing, connect to the 3/8" male flare at the back of the cabinet. Install a hand valve near the machine to control the water supply. Water Treatment: In most areas, a water filter of some type will be useful.
ND650 FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES The electrical power to the unit is supplied through the junction box at the rear of the machine. Check the nameplate (located on the back panel) for the voltage requirements, and for the minimum circuit ampacity. The machine requires a solid chassis to earth ground wire. The ice maker should be connected to its own electrical circuit so it would be individually fused.
ND650 FOR THE INSTALLER: Final Check List 1. Is the icemaker-dispenser installed indoors, in a location where the air and water temperatures are controlled, and where they do not go beyond design limitations? BACK VIEW OF COMPLETED INTSTALLATION ELECTRICAL? 2. is there an electrical service disconnect within sight of the installed machine? Is the machine on a separate circuit? Has the voltage been checked and compared to nameplate requirements? LEVELED? 3.
ND650 INITIAL START UP Pre Start Inspection 1. Remove the two front panels. 2. Check that all shipping blocks have been removed. 3. Remove any and all packing tape (check inside the storage bin). 4. Inspect the interior of the machine for loose screws or wires. Check that no refrigerant lines are rubbing each other. Check that the fan blade on air cooled models turns freely. 5. Check that the machine is installed correctly according to the final check list. Start Up 6.
ND650 COMPONENT DESCRIPTION Low Pressure Cut Out Switch: A manual reset Control Box: Contains the electrical controls that control that shuts off the ice machine when the low operate the machine. side pressure drops below a preset point, 0-4 psig. High Pressure Cut Out Switch: A manual reset switch sensing the high side refrigeration pressure. It is set to shut the machine off, and illuminate the reset switch light if the discharge pressure should ever exceed 450 psig.
ND650 COMPONENT DESCRIPTION Evaporator: A refrigerated vertical tube filled with water and containing a water seal and auger. Auger: A solid stainless steel double spiral auger, it pushes the ice crystals up to the top of the evaporator. Water Seal: A two part "face" seal, the top half rotating with the auger, the bottom half stationary, the sealing action being where the two seal "faces" meet. Ice Sweep: A plastic cap with "fingers". It revolves with the auger to "sweep" the ice into the ice chute.
ND650 COMPONENT DESCRIPTION: Control Box Contactor: A definite purpose contactor connecting the compressor to the power supply. Circuit Board: Controlling the ice machine through sensors and relays. The sensors are for ice level and water level. The relays are for POTENTIAL the gear motor (with a built in RELAY time delay to clear the evaporator of ice when the unit turns off) and for the compressor. The reset switch is mounted on the circuit board. On/Off Switch: Manual TRANSFORMER control for the machine.
ND650 ELECTRICAL SEQUENCE • If the high pressure control (cut out switch) Refer the wiring diagram as needed.
ND650 OPERATION: Water Water enters the machine through the 3/8" male flare at the rear of the cabinet, goes to a strainer and then to the water reservoir which it enters through the float valve. The water then goes out the bottom of the reservoir tank to the bottom of the evaporator. Reservoir overflow, evaporator condensation and water in the sink are all routed to the drain.
ND650 OPERATION: Refrigeration Beginning at the compressor, the refrigerant 502 is compressed into a high temperature gas. The discharge line directs this gas to the condenser. At the condenser (air or water cooled) the gas is cooled by either air or water and it then condenses into a liquid. This high pressure liquid then goes through the liquid line to the expansion valve.
ND650 OPERATION: Ice Vending When the ice dispensing glass filler lever is pushed, an electrical circuit is made to the portion control module in the control box. That module will energize the agitator drive motor for a certain length of time, depending upon the setting of the portion control knob. The dispensing takes place when the agitator sweeps the ice over the ice dispensing chute: ice will continue to discharge out this chute as long as the agitator is turning. It stops when the agitator stops.
ND650 MAINTENANCE AND CLEANING ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// A Scotsman Ice System represents a sizable investment of time and money in any company’s business. In order to receive the best return for that investment, it MUST receive periodic maintenance. It is the USER’S RESPONSIBILITY to see that the unit is properly maintained.
ND650 MAINTENANCE AND CLEANING ///////////////////////////WARNING///////////////////////////// Disconnect electrical power before beginning. ////////////////////////////////////////////////////////////////////////// 1. The ice machine senses water level by a probe located in the water reservoir. At least twice a year, the probe should be removed from the reservoir, and the tip wiped clean of mineral buildup. 2.
ND650 MAINTENANCE AND CLEANING In some areas, the water supply to the ice maker will contain a high concentration of minerals, and that will result in an evaporator and auger becoming coated with these minerals, requiring a more frequent removal than twice per year. If in doubt about the condition of the evaporator and auger, the auger can be removed so the parts can be inspected. Note: Water filters can filter out suspended solids, but not dissolved solids. "Soft" water may not be the complete answer.
ND650 SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: ICE MAKER DOES NOT OPERATE A. Check: Voltage to the unit, restore it if there is none. Compare to the nameplate. B. Check: The master switch, switch ON if off. C. Check: The 3 reset switches, (circuit board, high and low pressure): depress and release each switch. If the still does not start, check: the spout switch; the high and the low side pressures. D.
ND650 1. Restore/adjust water level. See the next step. SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: ICE MAKER DOES NOT OPERATE H. Check: The gear motor, if it will not run, the compressor will not run. If no power to it: Check: The indicator lights on the circuit board, the bin empty light should be ON, the no water light should be OFF . 1. If the bin empty and no water lights are off, check the transformer. a. Transformer "load" side should have 12 to 15 volts.
ND650 STATUS: GEARMOTOR OPERATES, COMPRESSOR DOES NOT A. Check the compressor relay. The relay is on the circuit board, if it does not supply power to the contactor coil, the compressor will not run. 1. Check for power at the contactor coil, if none: a. Check for power at the compressor relay at the circuit board. If there is power at the relay, but none at the contactor coil, Check for an open wire between the relay and the contactor. 2. Check the contactor coil. If the coil is open, replace the contactor.
ND650 SERVICE DIAGNOSIS: Condition - Low Ice Production STATUS: EVERYTHING IS OPERATING A. Check the air cooled condenser for dirt. Clean as required. Check the head pressure on water cooled. Adjust as required. If the head pressure is very high: 1. Air cooled. Check for high air temperatures, or restrictive air flow. Correct as needed. 2. Water cooled. Check for high water temperatures, or low water pressure. Correct as needed. 3.
ND650 SERVICE DIAGNOSIS: Condition - Poor or No Ice Dispensing STATUS: There is power to the unit, but no ice dispensed A. Check for ice in the bin. If no ice, check the ice making system. If the ice making system is normal, the demand for ice may exceed the quantity the icemaker dispenser can produce. Check with the user on ice usage: advise the user that another machine may be needed. B.
ND650 REMOVAL AND REPLACEMENT WATER RESERVOIR 1. Shut off the water supply to the icemaker. 2. Remove front panel and reservoir cover. 3. To remove float only, pry the mounting flanges apart enough to lift one float pivot pin out of the flange hole, and pull float up and out of the reservoir. 4. To remove reservoir, disconnect water inlet compression fitting at reservoir inlet. 5. Remove drain hose from reservoir. 6. Remove evaporator inlet hose from reservoir. 7.
ND650 REMOVAL AND REPLACEMENT: Bearing And Breaker Note: Removal of the auger, water seal, evaporator and gearmotor must begin at the top of the assembly. To Remove the Breaker Bearing Assembly: //////////////////////////////WARNING//////////////////////////// Disconnect the electrical power to the machine at the building source BEFORE proceeding with any repair. ////////////////////////////////////////////////////////////////////////// 1. Remove panels and disconnect electrical power. 2.
ND650 REMOVAL AND REPLACEMENT //////////////////////////WARNING//////////////////////////// Disconnect electrical power. Note that the auger has very sharp edges, handle with care. /////////////////////////////////////////////////////////////////////// To Remove the Auger: Turn off the water to the machine, and unclip the evaporator drain hose, pull it down and drain the evaporator into the bin or a container. 1. The top panel must be removed. 2. Remove ice chute cover. 3. Unscrew ice sweep. 4.
ND650 REMOVAL AND REPLACEMENT: Water Seal To Remove the Water Seal: (Assuming all steps to remove the auger have been performed.) 1. The gearmotor/evaporator assembly will have to be exposed. (See illustration - next page) 2. Remove the 4 hex head cap screws holding the evaporator to the gearmotor assembly. Lift the evaporator up and off of the gearmotor. 3. Remove the snap ring or wire retainer from the grove under the water seal. 4. Pull or drive out the lower half of the water seal. 3.
ND650 REMOVAL AND REPLACEMENT To Replace the Evaporator: (Assuming all the steps for removal of the thrust bearing, breaker, auger, and water seal have been performed.) 1. Discharge the refrigerant from the ice maker. 2. Unsweat the refrigerant connections: a) At the thermostatic expansion valve outlet. //////////////////////////////CAUTION/////////////////////////// Heat sink the TXV body when unsweating or resweating the adjacent tubing.
ND650 TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY (Assuming that the procedures through removal of the water seal have been performed.) 1. Remove the electrical wires from the gear drive motor. /////////////////////////////WARNING//////////////////////////// Disconnect electrical power before begining removal procedures. ////////////////////////////////////////////////////////////////////////// 2. Unscrew the 4 cap screws holding the gearmotor to the gearmotor plate. 3.
ND650 TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY WATER SHED CENTRIFUGAL SWITCH GREASE SEAL DRIVE MOTOR GEARCASE COVER FIRST GEAR AND BEARINGS ROTOR BEARING ROTOR SHAFT SEAL SECOND GEAR AND BEARINGS GASKET GEARCASE /////////////////////////////WARNING//////////////////////////// Disconnect electrical power before begining removal procedures.
ND650 REMOVAL AND REPLACEMENT INSTRUCTIONS FOR USING TESTER MODEL FC1 (Optional, order part no. A33942-001) (These instructions assume that the unit will not run, and prior investigation of electric power, controls, and mechanical parts indicates that the electronic circuit may be at fault.) /////////////////////////////////////////////////////////////////////////////WARNING///////////////////////////////////////////////////////////// These procedures require the machine to be connected to the power supply.
ND650 REMOVAL AND REPLACEMENT Water Level 1. Unplug "water sen" connector from control board. 2. Plug "water sen" connector from Scotsman tester into circuit board. a. Move "water" switch on tester to No Water position. The No Water light on the circuit board should go ON. If not, replace the circuit board. b. Move the "water" switch on the tester to the Water position. The No Water light on the board should go OFF. If not replace the circuit board. If the light does go off, replace the water level sensor.
