Scotsman FM1202RL Скачать руководство пользователя | Manualshive

Страница: 12 / 24

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OPERATION: Refrigeration

The remote high side supplies high
pressure liquid refrigerant to the
liquid line connection on the ice
machine. After the sight glass, there
is a liquid line leading to a liquid line
valve. When the ice level sensor
causes the circuit board to energize
the liquid line valve, the valve
opens, allowing the liquid refrigerant
to enter the expansion valve. The
thermostatic expansion valve
meters the liquid refrigerant into the
evaporator, where it boils off
(evaporates) and absorbs heat. It
then moves through the ball valve
and into the evaporator pressure
regulator valve, or EPR. The EPR
keeps the evaporator pressure
above a predetermined point, even
though the suction line pressure of
the remote high side system may
vary. The refrigerant, now a low
pressure gas, moves into the
suction line of the remote high side
system.

LIQUID

LINE

SIGHT GLASS

HAND VALVE

LIQUID LINE

VALVE

THERMO VALVE

EVAPORATOR

BALL VALVE

EPR VALVE

SUCTION LINE

Single System RL

January 1997

Page 12

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Содержание FM1202RL

Страница 1: ...CATION Page 7 COMPONENT DESCRIPTION Control Box Page 8 COMPONENT DESCRIPTION Evaporator Page 9 ELECTRICAL SEQUENCE Page 10 OPERATION Page 11 OPERATION Refrigeration Page 12 MAINTENANCE AND CLEANING Page 13 MAINTENANCE Page 14 CLEANING Page 15 SERVICE DIAGNOSIS Condition No Ice Being Produced Page 16 REMOVAL AND REPLACEMENT Page 18 REMOVAL AND REPLACEMENT Bearing And Breaker Page 19 REMOVAL AND REP...

Страница 2: ...t or exceed the standards of U L N S F and C U L Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way including the use of any parts and or other components not specifically approved by Scotsman Scotsman reserves the right to make design changes and or improvements at any time Specifications and designs are subject to c...

Страница 3: ...egs of the KLP4 Locate the Nameplate The nameplate is located on the back panel of the machine and contains the electrical characteristics particular to the unit being installed Refrigeration Installation The skills of a refrigeration technician are required to connect the ice machine to the buildings refrigeration system Notes Suction Line and Liquid Line Stubs are at the back of the cabinet 1 5 ...

Страница 4: ...ram The ice machine should be connected to it s own electrical circuit and be individually fused Voltage when the unit is under full load must remain within the limitations listed on page 2 LOW VOLTAGE CAN CAUSE EQUIPMENT MALFUNCTION AND OR DAMAGE All external wiring should conform to the National State and local electrical codes Usually the services of a licensed electrician will be required DETA...

Страница 5: ... the ice maker and the water supply Drain System All drains are of the gravity type and must have a minimum of 1 4 fall per foot of horizontal run The drains must be installed to conform to local plumbing codes The use of a vent at the machine and at the bin will allow the system to drain properly Use only rigid tubing for drains insulation of the bin drain is recommended SHUT OFF VALVE FIELD SUPP...

Страница 6: ... how to maintain the ice maker 13 Has the owner been given the name and telephone number of the local Scotsman service agency Initial Start Up 1 Remove the top and front panels 2 Open the water valve and observe that the two float reservoirs fill up with water and shut off 3 Switch on the electrical power 4 Open the hand valve in the liquid line 5 Open the ball valve in the suction line 6 Switch o...

Страница 7: ...t at the TXV bulb and check the low side pressure at the EPR valve Convert the pressure to temperature using a temperature pressure chart and subtract the amount from the outlet temperature The result is the superheat Use an electronic thermometer EPR Evaporator Pressure Regulator Valve This valve maintains a constant pressure on its inlet evaporator side regardless of the pressure on the outlet s...

Страница 8: ...he relays are for the gear motor 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 On Off Switch Manual control for that side of the machine ON OFF SWITCH TRANSFORMER CIRCUIT BOARD TERMINAL STRIP Single System RL January 1997 Page 8 ...

Страница 9: ...n 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 Divider Where the ice is compressed and much of the extra water is squeezed out of it before it is discharged into the bin Motor A split phase motor that drives the gear reducer Bearing As the ice is pushed up the evaporator the auger is thrust down and pressure...

Страница 10: ...ght will stay on and the machine will continue to run unless the ice stays between the sensors 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 relay opens The liquid line valve closes Ice making stops The auger motor is run by the circuit board for 2 more minutes clearing out ice in the evaporator and the...

Страница 11: ...h 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 or evaporator condensation is routed to the drain WATER INLET RESERVOIR ICE CHUTE WATER LEVEL EVAPORATOR WATER INLET DRIP PAN DRAIN WATER SCHEMATIC Single System RL January 1997 Page 11 ...

Страница 12: ...pansion valve meters the liquid refrigerant into the evaporator where it boils off evaporates and absorbs heat It then moves through the ball valve and into the evaporator pressure regulator valve or EPR The EPR keeps the evaporator pressure above a predetermined point even though the suction line pressure of the remote high side system may vary The refrigerant now a low pressure gas moves into th...

Страница 13: ...has been added to the reservoir and the reservoir is nearly empty switch the master switch to OFF 11 After draining the reservoir as in step 6 wash and rinse the water reservoir 12 Go thru steps 13 19 to sanitize the ice machine water system 13 Mix two gallons of sanitizer solution Use an approved sanitizer A possible sanitizer solution may be obtained by mixing two gallons of warm 90 115o F potab...

Страница 14: ...o be checked at least two times per year Check the bearing by pushing the bail clamp back and removing the ice chute cover unscrewing the ice sweep unscrewing the breaker cover unscrewing the auger stud Inspect the assembly looking for wear See Removal and Replacement to replace bearing or seals Reverse to reassemble 4 Check and tighten all bolts and screws BREAKER COVER CLEAN THE ICE LEVEL CONTRO...

Страница 15: ...tion on removal of these parts see REMOVAL AND REPLACEMENT 1 To remove the auger remove front and top panel If top panel cannot be removed or if there is less than 6 clearance over the top of the machine the gearmotor evaporator may be slid out for service access See Removal And Replacement 2 Push bail clamp back and remove ice chute cover 3 Unscrew and remove ice sweep 4 Loosen band clamp under i...

Страница 16: ...transformer 2 If the transformer is good and the bin empty light is OFF check the ice level sensors a Remove sensors by sliding them sideways out of the ice chute Visually inspect them clean if needed b Look through the ice chute eye hole for something blocking the ice chute c If the unit still does not run replace the ice level sensors d If the bin empty light is still OFF check the circuit board...

Страница 17: ...the liquid line valve coil Check for an open wire between the relay and the valve 2 Check the valve coil If the coil is open replace the liquid line valve 3 Check the auger drive motor centrifugal switch If when the drive motor is running contact 4 black wire removed has no power and all of the above switches have been checked replace the centrifugal switch or the drive motor 4 If the liquid line ...

Страница 18: ...ir from ice 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 behind it are two plastic bin control mounts 5 Slide each bin control to the left and in the control box disconnect the electrical leads connecting the bin control to the circuit board 6 Re...

Страница 19: ... 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 must be pressed in with a tool pushing against the outer edge only they will not install by hand Replace parts as required Re grease bearing with Scotsman part no 19 0609 01 bearing grease Replace top sea...

Страница 20: ...eaker to evaporator d Lift up and 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 8 18 Inspect the auger the critical areas of the auger are 1 The auger body It should be clean and shining Sometimes an auger will appear clean when wet but after it is dry it will be seen to be stained Scrub th...

Страница 21: ... the water seal that rotates with the auger must also be replaced Remove the old part from the auger and clean the mounting area 4 Place a small bead of food grade silastic sealant such as 732 RTV or Scotsman part number 19 0529 01 on the area of the auger where the water seal is to be mounted 5 Carefully push the water seal rubber side against the auger shoulder and the silastic CAUTION Do not ge...

Страница 22: ...at in the new evaporator at the old connections 6 Install an new 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 order of disassembly See To Reassemble Evaporator and Auger To Reassemble the Evaporator and Auger 1 After the gearmotor has been inspec...

Страница 23: ...y check the gears and bearings 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 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 available only as presse...

Страница 24: ... the bin full switch on the tester to Full The light on the tester should be ON If the light on the tester is not on the circuit board should be replaced b If the light 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 seconds for the machine to start if t...

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