Scotsman NM952R Service Manual Download Page 7 | Manualshive

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FOR THE INSTALLER: Location

TWO UNITS ON ONE

CONDENSER

REMOTE

CONDENSER

EXCESS

PRECHARGED

TUBING INSIDE

BUILDING

ICE MAKERS

SERVICE

ACCESS

SERVICE ACCESS

SIDE AND BACK

ROOF

CUTAWAY

WALL

CUTAWAY

NM952R

November 1992

Page 7

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Summary of Contents for NM952R

Page 1: ...and water level a thermostatic expansion valve and R 22 as the refrigerant TABLE OF CONTENTS For the Installer Specifications 2 Location 4 Remote Condenser 5 For the Plumber 8 For the Electrician 9 F...

Page 2: ...tion required for the specific job Back View Liquid Line Connection Discharge Line Connection Remote Condenser Junction Box Electrical Inlet Water Inlet 3 8 Flare Drain 3 4 FPT 2 96 3 5 25 20 84 Allow...

Page 3: ...ne set 40 R 22 KCMR230 Fan Relay Kit used when two 230 volt 32 ice makers are on one 230 volt 32 two circuit condenser DIMENSIONS H X W X D MODEL USE WITH MINIMUM CIRC AMPACITY BASIC ELECTRICAL RC1022...

Page 4: ...ll on top of the bin After the unit is placed on the bin line it up so it is even with the back side Secure the machine to the bin with the hardware provided with the machine Remove the front panel an...

Page 5: ...e have quick connect couplings one end has a schrader valve connection that end goes to the condenser Note The openings in the building ceiling or wall listed in the next step are the minimum sizes re...

Page 6: ...ker fitting marked liquid line Final Connections 3 Begin tightening the couplings together by hand then using two wrenches it is important that ONLY the nut on the precharged lines be turned the other...

Page 7: ...STALLER Location TWO UNITS ON ONE CONDENSER REMOTE CONDENSER EXCESS PRECHARGED TUBING INSIDE BUILDING ICE MAKERS SERVICE ACCESS SERVICE ACCESS SIDE AND BACK ROOF CUTAWAY WALL CUTAWAY NM952R November 1...

Page 8: ...line is of the 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...

Page 9: ...he compressor and the fan motor operates whenever the compressor operates Electrical connections are made at the junction box at the back of the ice maker and at the junction box on the remote condens...

Page 10: ...a solid earth ground wire to the ground screw 3 Route connecting wires from the first ice maker junction box marked condenser fan and connect it to the KCMR230 terminal strip marked NO 1 ICE MACHINE 4...

Page 11: ...rminals 1 and 3 Compare the readings obtained to the ones in the following list C Test terminals 1 2 Full Voltage 208 230 Test terminals 1 3 No voltage Test terminals 2 3 Full Voltage Test terminals 2...

Page 12: ...SULATED PRECHARGED REFRIGERANT TUBING A typical installation should generally appear as illustrated below The remote condenser must be located above the ice maker and the precharged lines installed pe...

Page 13: ...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 conden...

Page 14: ...Valve 4 Turn the master switch on The electrical start up 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 lin...

Page 15: ...ut 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 in...

Page 16: ...with a built in time delay to clear the evaporator of ice when the unit turns off and for the liquid line valve Transformer Supplies low voltage to the circuit board Pump Down Control An automatic re...

Page 17: ...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 down control opens...

Page 18: ...which it enters through the float valve The water them goes out the bottom of the reservoir tank to the bottom of the evaporator Reservoir overflow or evaporator condensation is routed to the drain AD...

Page 19: ...upon 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...

Page 20: ...rigerant 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 220 psig At that p...

Page 21: ...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 low...

Page 22: ...and Hydroxyacetic acids These compounds are corrosive and may cause burns If swallowed DO NOT induce vomiting Give large amounts of water or milk Call Physician immediately In case of external contact...

Page 23: ...ineral build up 3 The top bearing in the breaker should also be checked at least two times per year Check the breaker bearing by removing the ice chute cover unscrewing the ice sweep removing the wate...

Page 24: ...rding 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 Remove 3 hex studs holding ice...

Page 25: ...he head pressure control valve it should be maintaining a head pressure above 220 psig If the unit has the correct charge and the condenser is clean and the refrigerant lines are not kinked or twisted...

Page 26: ...place the circuit 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...

Page 27: ...arbox and Check for internal damage repair and replace in the machine b Check for low charge add some refrigerant if the unit begins to operate normal low side pressure being about 25 psig stop and lo...

Page 28: ...ay be 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 I...

Page 29: ...maker 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 chute in front of and...

Page 30: ...olding breaker to evaporator d Lift up and remove breaker bearing assembly from auger evaporator 6 Service the bearing Check for rust rough spots and damage a The bearing is pressed into the breaker t...

Page 31: ...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 ha...

Page 32: ...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 33: ...y heat sink material Specifically Recover reclaim or recycle refrigerant Although the method chosen is up to the service company Scotsman recommends reclaim There are various mechanical devices that m...

Page 34: ...cover is in place between the gearcase cover and the drip pan gasket Torque the bolts to 110 inch pounds 2 Lower the auger into the evaporator barrel slightly turning it to match up with the drive end...

Page 35: ...e oil level too high carefully inspect the bearings and gears If in doubt about the condition of a part replace it The oil quantity is 16 fluid ounces do not overfill Note The gears and bearings are a...

Page 36: ...ower on the master switch on and all the reset switches reset 1 Unplug photo trans and LED connectors from the circuit board 2 Plug photo trans and LED connectors from the tester into the circuit boar...

Page 37: ...ter 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...

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