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Scotsman NME650R, Service Manual

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Scotsman NME650R Service Manual Download Page 10

FOR THE INSTALLER: Completed Installation

ROOF 

CUT-AWAY

INSULATED

PRECHARGED

REFRIGERANT

TUBING

A typical installation should generally appear as
illustrated below. The remote condenser must be
located above the icemaker and the precharged
lines installed per the instructions on page 6.

NME650R

June 1994

Page 10

Summary of Contents for NME650R

Page 1: ...1 FOR THE INSTALLER 2 REMOTE CONDENSER SPECIFICATIONS 4 FOR THE INSTALLER Remote Condenser 5 FOR THE PLUMBER 8 FOR THE ELECTRICIAN 9 FOR THE INSTALLER Completed Installation 10 START UP 12 COMPONENT...

Page 2: ...Correct Bin Top All kits legs and information required for the specific job Model Dimensions W x D x H Basic Electrical Ice Type Refrigerant Type Refrigerant Charge Max Fuse Size Min Circuit Ampacity...

Page 3: ...talled in a location where it has enough space around it to be accessible for service usually a minimum of 6 inches Try to avoid hot dirty and crowded locations Be sure that the location for the machi...

Page 4: ...ine set 40 R 404A ICEMAKER NAMEPLATE LOCATED ON BACK PANEL SERIAL PLATE LOCATED BEHIND FRONT PANEL 19 7 8 23 13 16 Model Use with Basic Electrical RCE501 1 1 NME650R 115 60 1 ERC101 1 SAME 115 60 1 ER...

Page 5: ...of precharged refrigerant lines either 25 foot or 40 foot consists of a 3 8 inch diameter liquid line and a 1 2 inch diameter discharge line Both ends of each line have quick connect couplings one en...

Page 6: ...wrenches it is important that ONLY the nut on the precharged lines be turned the other parts of the couplings must NOT be allowed to turn or the process will tear out the diaphragms and they will be l...

Page 7: ...E INSTALLER Location TYPICAL INSTALLATION REMOTE CONDENSER EXCESS PRECHARGED TUBING INSIDE BUILDING ICEMAKER SERVICE ACCESS SERVICE ACCESS SIDE AND BACK ROOF CUTAWAY WALL CUTAWAY NME650R August 1993 P...

Page 8: ...he gravity type and 1 4 inch per foot fall is an acceptable pitch for the drain tubing There should be a vent at the highest point of the drain line and the ideal drain receptacle would be a trapped a...

Page 9: ...the compressor and the fan motor operates whenever the compressor operates Electrical connections are made at the junction box at the back of the icemaker and at the junction box on the remote conden...

Page 10: ...INSULATED PRECHARGED REFRIGERANT TUBING A typical installation should generally appear as illustrated below The remote condenser must be located above the icemaker and the precharged lines installed p...

Page 11: ...f 20 psig 7 Has the machine been secured to the bin 8 If two units on one condenser has the relay kit been installed 9 Is there a water shut off valve installed near the machine 10 Is the remote conde...

Page 12: ...sequence is now on automatic A There should be a short 15 second delay before the gearmotor starts B After the gearmotor starts the liquid line valve will open the low pressure control will close and...

Page 13: ...out of Will shut the machine off it there is none Ice Discharge Chute Directs the ice produced by the evaporator into the storage bin Ice Level Sensor An electronic eye it senses the presence of ice i...

Page 14: ...s inlcude ice level in the bin with electric eyes Water level in the reservoir with a thermisitor Amp draw of the auger drive motor The loads include Liquid line coil Auger drive motor Pump Down Contr...

Page 15: ...ors for more than 15 seconds bin full At that point the bin empty light goes out and the machine shuts down Shut Down consists of The liquid line solenoid closes lowering the suction pressure The pump...

Page 16: ...low or evaporator condensation is routed to the drain RESERVOIR DRAIN TUBE WATER LEVEL WATER INLET DRAIN Water Level The correct water level should be checked when the machine is making ice Locate the...

Page 17: ...n the temperature of the evaporator warmer evaporators get more refrigerant and colder evaporators get less At the evaporator the refrigerant enters an area of relatively low pressure where it can eas...

Page 18: ...frigerant into the condenser with a small amount of discharge gas going into the receiver to maintain pressure until the head pressure is built back up to the rated gauge pressure of 180 psig At that...

Page 19: ...this point the refrigerant flow is stopped by the closed liquid line valve This action forces the refrigerant into the receiver and keeps it out of the compressor The pump down continues until the lo...

Page 20: ...be between 90 and 115 degrees F 8 Slowly pour the cleaning solution into the water reservoir until it is full Wait 15 minutes then switch the master switch to ON 9 As the ice maker begins to use wate...

Page 21: ...o times per year Check the breaker bearing by removing the ice chute cover unscrewing the ice sweep removing the water shed unscrewing the breaker cover left hand thread unscrewing the auger stud Insp...

Page 22: ...specialist regarding water treatment For more information on removal and replacement of these parts see REMOVAL AND REPLACEMENT 1 To remove the auger remove the front and top panels 2 Move bail clamp...

Page 23: ...gerant Charge 208 ounces of R 404A Typical Compressor Amp Draw 8 9 Typical Gearmotor Amp Draw 3 5 to 3 8 High Pressure Cut Out 450 PSIG Pump Down Pressure Switch after May 1995 production Opens at 15...

Page 24: ...r the air around it kept cooler Check the fan motor for tight bearings and proper rotation Check that the fan blades are clean and the fan secure to the fan motor shaft b Check the head pressure contr...

Page 25: ...it board If the bin full light on the tester is ON move the tester switch to bin empty the light on the tester should go OFF and the bin empty light on the circuit board should go ON If not replace th...

Page 26: ...ce in the machine b Check for low charge add some refrigerant if the unit begins to operate normal low side pressure being about 30 psig stop and look for a leak repair replace the drier evacuate and...

Page 27: ...e restricted defective or not adjusted properly If needed replace the TXV evacuate and recharge per nameplate 4 Check the insulation on the evaporator It should be dry with no wet spots or frost If th...

Page 28: ...emove reservoir from icemaker 8 Reverse to reassemble BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box cover 4 Locate ice chute at the base of the...

Page 29: ...rough spots and damage a The bearing is pressed into the breaker to remove the bearing and replace it an arbor press is needed b Replace lower seals before installing new bearing in breaker Note seals...

Page 30: ...er left hand threads b Unscrew auger stud from top of auger c Unscrew 4 allen head cap screws holding breaker to evaporator d Lift up on breaker to remove from auger If the auger is stuck Use a slide...

Page 31: ...ace the snap ring and pull the water seal down against it 3 The part of the water seal that rotates with the auger must also be replaced Remove the old part from the auger and clean the mounting area...

Page 32: ...the Evaporator and Auger 1 After the gearmotor has been inspected fasten the evaporator to the gear motor be sure that the number of shims indicated on the gear case cover is in place between the gea...

Page 33: ...They are likely to be fine if the oil is If there is evidence of water in the oil rusty bearings and gears the oil having a creamy white appearance oil level too high carefully inspect the bearings an...

Page 34: ...meplate of the ice machine or performance will suffer Anytime the refrigeration system has been opened the dryer should be replaced Note Only a HFC type dryer should be used When brazing the tubing co...

Page 35: ...anufacturer if in doubt As with any other refrigerant do NOT mix HP62 with pressurized air when leak testing Pressure Temperature Chart for HP62 VAPOR VAPOR TEMP PRESSURE TEMP PRESSURE DEG F PSIG DEG...

Page 36: ...ght on the tester IS on move the bin full switch to Bin Empty The light on the tester should go OFF and the Bin Empty light on the circuit board should go ON If the Bin Empty light is ON wait 10 20 se...

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