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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 MDT6 is a combination nugget ice maker and

countertop dispenser. A water station is standard.

The ice making section is equipped with the

following features: electronic controls for bin level

and low water; thermostatic expansion valve; front

service for most components; and R-404A

refrigerant. The ice dispensing section is a

seamless plastic storage bin, with a stainless steel

ice agitator at the bottom to sweep the ice into the

dispensing chute.

MDT6N90

May 2001

Page 1

Table of Contents

TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY · · · · · · · · · · · · · · · · · · Page 27
REFRIGERATION SERVICE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 28

This manual was printed on recycled paper.

Keep it for future reference.

Note this symbol when it appears.

It marks a possible hazard.

Содержание MDT6N90

Страница 1: ...ions Page 2 FOR THE INSTALLER Page 3 FOR THE PLUMBER Page 4 FOR THE ELECTRICIAN Page 5 FOR THE INSTALLER Final Check List Page 6 INITIAL START UP Page 7 COMPONENT DESCRIPTION Page 8 COMPONENT DESCRIPT...

Страница 2: ...a raw material water and turns it into a food product ice The purity of the water is very important in obtaining pure ice and in maximizing product life General recommendations are 1 Filter the water...

Страница 3: ...lers so that the stand does not rock Counter Top or Machine Stand Installation The base of the icemaker dispenser must be sealed to the object it rests upon Food grade silastic sealant such as Scotsma...

Страница 4: ...trol it to the 3 8 FPT condenser inlet at the back of the cabinet The water pressure to all lines must always be above 20 psig and below 120 psig Drains Air Cooled Models Connect a drain tube to the o...

Страница 5: ...ity 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 Voltage variation must remain within des...

Страница 6: ...n checked and compared to nameplate requirements 3 Have all of the plumbing connections been made and checked for leaks 4 Has the machine been leveled 5 Is there a minimum of 6 inches of clearance at...

Страница 7: ...l depend upon air and water temperatures but should be between 200 PSIG and 300 PSIG Water cooled discharge pressure should be about 245 PSIG If needed adjust the water regulating valve The above numb...

Страница 8: ...e Drain Tube When uncapped and lowered drains the evaporator Condenser Air or water cooled where the heat removed in ice making is discharged Ice Storage Bin Assembly A plastic lined insulated cylinde...

Страница 9: ...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 Breaker Where the ice is compressed and much of the extra water is squeezed...

Страница 10: ...reservoir The loads include Compressor contactor Fan motor Bin drive motor Auger drive motor Water solenoid In addition a Clean switch is available to temporarily disable the Touch Free sensors for c...

Страница 11: ...compressor stops The auger motor is run by the circuit board for 2 more minutes clearing out ice in the evaporator and then The auger motor no longer receives power from the circuit board and the auge...

Страница 12: ...alve then to the water cooled condenser and down the drain The water dispensing station adds an additional water circuit When the water station sensor detects a container in front of it the control bo...

Страница 13: ...depending 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 wh...

Страница 14: ...same time power is connected to the agitator drive motor Dispensing takes place when the agitator sweeps the ice through the ice dispensing chute ice will continue to discharge out this chute as long...

Страница 15: ...nk should be flushed with hot water and wiped clean with sanitizer 4 The splash panel requires special attention to clean it Push and release the Splash Panel Cleaning switch located to the left of th...

Страница 16: ...t 15 minutes then switch the master switch to ON 9 As the ice maker begins to use water from the reservoir continue to add more cleaning solution to maintain a full reservoir 10 After all of the clean...

Страница 17: ...and the tip wiped clean of mineral build up 2 The bin control uses devices that sense light therefore they must be kept clean enough so that they can see At least twice a year remove the bin control s...

Страница 18: ...e action of the bearing It should rotate smoothly To remove the breaker remove the lower ice chute then take out all four allen head cap screws and pull the breaker off the auger and evaporator If the...

Страница 19: ...OVAL AND REPLACEMENT Disconnect electrical power and shut off the water supply Use care when removing the auger it has sharp edges 1 To remove the auger remove the front and top panels 2 Drain evapora...

Страница 20: ...oes not turn Auger can t turn No power to circuit board Check harness HI pressure cut out open Circuit Board gear motor relay will not close Check replace board Water level or ice level sensor failed...

Страница 21: ...is ON and machine is connected to electrical power 1 Power ON Normal On when ice level is low unit making ice 2 Bin Empty ON Needs Ice Normal 6 minute off delay start To prevent short cycling the mach...

Страница 22: ...el sensor probe 8 Remove mounting screws from reservoir bracket and remove reservoir from icemaker 9 Reverse to reassemble BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front p...

Страница 23: ...h 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 mus...

Страница 24: ...crews holding breaker to evaporator d Lift up remove breaker from evaporator e If the auger is stuck use a slide hammer type puller to pull on the auger at the threaded hole The size of that hole is 5...

Страница 25: ...the grove for the snap ring 2 Replace 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...

Страница 26: ...w drier in the liquid line 7 Evacuate the system until dehydrated then weigh in the nameplate charge Check for leaks 8 Install auger breaker breaker bearing assembly and ice discharge chute in reverse...

Страница 27: ...ine 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 and gears If in doubt abo...

Страница 28: ...glass and or a restricting device such as a Charge Faster installed in it for metering liquid into the low side of the system 1 After a thorough evacuation shut off the manifold valves and switch off...

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