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Removal and Replacement

Cube Size Control:

Before replacing the cube size control, it should be
positively determined that it is at fault.

If it does not open when warm, replace it.

1. Disconnect electrical power.

2. Remove the front panel.

3. Remove the control box cover.

4. Locate the cube size control.

5. Remove the two screws holding the control to
the control box, and lift the control out.

6. Pull the two wires off the posts of the cube size
control.

7. Follow the capillary tube of the cube size control
and remove it from the grommet in the back of the
control box.

8. Locate bulb on suction line.

9. The end of the cube size control is inserted in a
socket attached to the suction line. Pull it out of the
socket.

10. Replace the cube size control with the proper
part number, following the above steps from 9-1.
Be sure to re-insulate the cube size control bulb.

Electrical shock hazard.

Electrical shock can
cause personal injury.

Disconnect power before
beginning to service
components.

Cube Size Pig-Tail

Socket

Suction Line

Replacement of Cube Size

CM500

December, 1992

Page 20

Содержание CM500

Страница 1: ...is full The refrigeration system uses R 502 as the refrigerant Table of Contents Specifications page 2 Limitations page 3 Installation page 4 Plumbing page 5 Final Check List page 6 Component Location page 9 Initial Start Up page 10 Cleaning page 12 Water Refrigeration Schematic page 15 Technical Characteristics page 17 Service Diagnosis page 18 Removal and Replacement page 20 Parts lists and wiri...

Страница 2: ...he cabinet dimensions changed and between the D and E series when the compressor changed E Series Specifications The CM500 will stack onto a variety of ice storage bins see sales literature for proper ice storage bin There is an optional stainless steel panel kit SPKCMD 1 for this machine CM500 E Cabinet Model Number Dimensions W x D x H Condenser Type Basic Electrical Minimum Circuit Ampacity Max...

Страница 3: ...h the highest regard for safety and performance They meet or exceed the standards of UL NSF and CSA 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 part and or other components not specifically approved by Scotsman Scotsman reserves the right to make design changes and or improvements at an...

Страница 4: ...transforms it into a food product ice The purity of the water is very important in obtaining pure ice and in maximizing product life The water to the ice machine should be filtered Water filters vary greatly in ability and function Install one that filters out suspended solids to a dimension of 5 microns or less The finer the filter the better but finer filters may plug up sooner than course ones ...

Страница 5: ... just behind the cube drop area The end of the bin thermostat bracket with the plastic tubing on it will fit into the hole in the base of the machine 3 Locate and uncoil a portion of the bin thermostat capillary tube Route the end of the capillary tube into and through the bin thermostat bracket tube It should be inserted the full length of the tube but not past the end Stacking This machine will ...

Страница 6: ...s the bin drain and the other is the reservoir drain The reservoir drain is a 3 4 F P T brass fitting Drain tube material must be rigid and meet local code Traps in the bin drain line without vents ahead of them will cause poor draining The bin drain must be vented if there is a long horizontal run 5 or more The reservoir drain must be vented and not connected to the bin drain All drains are gravi...

Страница 7: ...sted on the nameplate and per the nameplate use fuses or HACR circuit breakers Electrical connections are made at the rear of the ice maker inside the junction box Follow All Local Codes This Unit Must Be Grounded Usually a licensed electrician will be required to connect the electrical service Hand Disconnect Switch Junction Box CM500 December 1992 Page 7 ...

Страница 8: ...aks 5 Have the drain connections been made 6 Have the drain connections been checked for leaks 7 Is the cabinet level 8 Is the ice machine connected to a 115 volt electrical power supply and is the ice machine the only load on that circuit 9 Has all of the shipping material been removed from the inside of the cabinet 10 Has the bin and cabinet been wiped clean and sanitized 11 Has the Customer Eva...

Страница 9: ...istributor Control box with cube size control adjustment ON OFF switch Compressor switch Inside the control box is control system for the ice machine Timer Cube Size Control Master Switch Compressor Switch Bin Thermostat Water Distributors Drain Trough Bin Thermostat Bracket Water Inlet Valve Strainer Used on D series only Water Pump Bin Thermostat Control Box Component Location Overflow Standpipe...

Страница 10: ... ice production and water use the water cooled discharge pressure must be 220 P S I G Check discharge pressure and adjust water regulating valve to obtain 220 P S I G discharge pressure 8 The water temperature in the reservoir will soon be 320 F and ice should begin to form on the evaporators Note In some cases some slush will form in the reservoir This is temporary and normal 9 Allow the ice mach...

Страница 11: ...the bin control circuit by holding ice on the bin control tube in the bin This simulates bin full and the ice machine should switch itself off at the end of a harvest cycle 13 Replace all the panels The ice machine is now ready for automatic operation Electrical Sequence This describes the sequence through a complete cycle Freeze Cycle During the first part of the freeze cycle the ice machine comp...

Страница 12: ...he unit 2 Remove the filter pad from in front of the condenser 3 Wash the surface of the filter off with cold water or if torn or so dirty it can t be cleaned replace with a new filter 4 Return the filter to its installed position 5 Replace the grill Do not operate the unit without the filter in place Note If the unit has been operated without the filter in place the fins of the condenser will bec...

Страница 13: ...nd scrub the scale off the liner 3 After the scale has been removed rinse all surfaces inside the bin with clean potable water Stainless Steel Components Inside Bin The stainless steel parts in the bin also require periodic cleaning Chemicals in the water supply such as chlorine cause brown stains to appear on the surface of the stainless steel parts 1 General Cleaning staining is usually removed ...

Страница 14: ...ter and compressor switches ON 16 Replace the front panel 17 Discard the next batch of cubes to make sure all of the acid sanitizer is gone CAUTION DO NOT use ice cubes produced from the cleaning or sanitzing solutions Be sure none remain in the bin 18 Pour hot water into the storage bin to melt the cubes and also clean out the bin drain 19 Wash the bin liner with a solution of household bleach 1 ...

Страница 15: ... and the water flowing over it From the evaporator the refrigerant flows back to the compressor through the suction line Water Schematic Water flows into the ice machine from its inlet connection at the back of the cabinet through the inlet water valve and into the reservoir The water in the reservoir is pumped up and through the water distributor tube at the top of the evaporators From there the ...

Страница 16: ...porator enough to allow the surface of the ice frozen to the evaporator to melt The remaining ice will then fall off into the bin During the Harvest Cycle the inlet water valve opens filling the reservoir and allowing the reservoir to overflow the drain Inlet Water Valve OPEN Water Pump Evaporator Water Distribution System Hot Gas Valve OPEN Suction Line Capillary Tube Condenser Dryer Compressor D...

Страница 17: ...2 and a quarter minutes Adjustable to match field requirements Typical low side pressure in harvest 95 100 PSIG Typical Discharge pressure in harvest 120 150 PSIG Hi Pressure Cut Out Point 450 PSIG air cooled 350 PSIG water cooled Hi Temperature Cut Out Point 140o F at hot gas valve Typical Compressor Amp Draw E series only 9 10 during the freeze cycle and 11 during the harvest cycle Older models ...

Страница 18: ...er turned off Reconnect water supply No water due to water filter plugged Replace water filter No water due to inlet water valve screen plugged Clean out inlet screen No water due to strainer screen plugged Clean out inlet screen No water due to Inlet water valve coil open Replace valve No water due to inlet water valve will not open Replace valve Water in reservoir but no water over evaporators W...

Страница 19: ...r faulty fan motor fan pressure switch not enough water thru water cooled condenser Check for causes of high discharge pressure and correct Inlet water temperatures and room ambient very high Advise user suggest additional room cooling Compressor inefficient Check replace compressor Cubes are wrong size shape Cube size control not adjusted properly Adjust cube size control Water system is restrict...

Страница 20: ...ize control 7 Follow the capillary tube of the cube size control and remove it from the grommet in the back of the control box 8 Locate bulb on suction line 9 The end of the cube size control is inserted in a socket attached to the suction line Pull it out of the socket 10 Replace the cube size control with the proper part number following the above steps from 9 1 Be sure to re insulate the cube s...

Страница 21: ...ne 6 Remove bracket from pump 7 Reverse above steps to replace Inlet Water Valve The valve water to enter the reservoir during harvest but not during freeze The valve may plug up from minerals in the water and may be cleaned rather than replaced 1 Shut off the water supply 2 Unscrew the fitting at the back of the valve and pull the water inlet tube out of the valve body 3 Remove the screws holding...

Страница 22: ...vailable through most refrigerant wholesalers Use conservation minded service procedures Refrain from checking refrigeration pressures without reason There are many ways to determine the proper operation of a Scotsman ice machine without using refrigerant gauges Visual inspection of the water system observation of the ice formation amp draw voltage and other techniques will lead to proper diagnosi...

Страница 23: ...d Always replace the dryer when repairing a leak or replacing a refrigeration component Evacuate the system with a good vacuum pump to 500 microns or less If the triple evacuation method is used the vacuum should be broken each time with dry nitrogen not refrigerant Evacuation must be from both sides of the system Weigh in or measure in the nameplate charge Recharge into the high side Check for le...

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