Viking VUIM150 Service Notebook Download Page 33

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Figure 7.1

7.1 Wiring Diagram

Figure 7.1 is the wiring diagram for the ice maker.

7.2 Point to Point Wire Layout

The diagram on the following page, figure 7.2, shows point-to-point termination. This
diagram is also located on the back panel of the unit along with the wiring diagram.
(figure 7.1).

Summary of Contents for VUIM150

Page 1: ...VIKING RANGE CORPORATION P O DRAWER 956 GREENWOOD MS 38930 USA...

Page 2: ...11 2 SEALED SYSTEM Introduction 11 Low Side Leaks 12 High Side Leaks 12 Restricted Capillary Tube 12 Access Valve 12 Pressure and Temperatures 13 Recharging 14 3 SEALED SYSTEM COMPONENTS Hot Gas Valve...

Page 3: ...y 80 F ambient 30 lbs day 90 F ambient 23 lbs day At 70 F water temperature 70 F ambient 32 lbs day 80 F ambient 27 lbs day 90 F ambient 20 lbs day Electrical Requirements 120VAC 60Hz Power Cord Lengt...

Page 4: ...nd condenser fins and base plate edges These areas can be sharp Refrigerant is under high pressure Evacuate system before attempting to open refrigerant system Reasonable care and safe work methods sh...

Page 5: ...ded 1 Hoses with R 134A couplers Must meet standards for handling R 134A refrigerant 2 Approved and certified recovery system for R 134A 3 Manifold gage set for R 134A 4 Charging cylinder with R 134A...

Page 6: ...used but may leak with age Use inch saddle shut off valve Check to make sure valve complies with local codes Do not use self piercing saddle valve or less than inch saddle valve as water flow will be...

Page 7: ...cessary for horizontal runs over 4 feet Proper routing sloping and size of drain is important especially if using flexible tubing or poor ice production will result If installing a standoff gravity dr...

Page 8: ...n tubing and cause water damage 1 11 OPERATION SELECTOR SWITCH IS IN THE ON POSITION The assumptions before proceeding are that water is supplied to the icemaker see page 7 there is proper electrical...

Page 9: ...viously in the OFF or CLEAN position the evaporator thermistor temperature will be ignored until the circulation pump has run for 2 minutes During all harvest cycles the evaporator thermistor temperat...

Page 10: ...ergize The clean cycle is now complete All loads will remain off as long as the selector switch remains in the CLEAN position and the power is not removed and re applied If at any time during a clean...

Page 11: ...st appear to be a system component failure may be only a simple control air flow electrical or defrost system problem 2 2 Low Side Leaks Low side leaks consist of a break in the system at the evaporat...

Page 12: ...he thermocouple 2 If it has been determined that there is proper contact between the thermistor and the evaporator plate the thermistor resistance value can be corresponded to the temperature see sect...

Page 13: ...responding pressure If low side pressure is below pressure in Table A check for the following 1 A system leak 2 Capillary tube is restricted 3 Insufficient compressor If low side pressure is above pre...

Page 14: ...d then recharge NOTE It is not uncommon to have some condensation or a slight frost on the suction line This may occur towards the end of the production cycle Liquid refrigerant is not getting into th...

Page 15: ...valve keeping the valve cool during brazing and evacuation of the system before charging must be done to prevent damage and eventual failure of the valve Figure 3 2 Figure 3 1 A quick way to check the...

Page 16: ...two screws that secure the top of the electrical bracket located in the front of the mechanical area see figure 3 4 7 Remove the six screws that secure the base plate to the cabinet on the bottom of t...

Page 17: ...damp cloth 7 Remove the heat sink or damp cloth from the valve body 8 Check for leaks using dry nitrogen gas and a leak detection system 9 Flush the system and recharge 10 Reassemble reversing steps...

Page 18: ...see figure 3 3 11 Remove the bin sensing tube with the bin thermistor remaining inside it It is not necessary to remove the bin thermistor from the sleeve Remove through the opening in the rear of th...

Page 19: ...NOT REMOVE THE RUBBER PLUGS AT THE TUBE STUBS ON THE COMPRESSOR AT THIS TIME 29 Remove the insulation tube on the evaporator tubing harness 30 Remove the evaporator from the front of the unit The evap...

Page 20: ...d and removed 2 Remove the access panel and rear panel at the rear of the unit see figure 3 3 3 Remove the grille by removing the two screws and disconnecting the three wires to the rocker switch Be s...

Page 21: ...reinstall the suction line and tubing harness insulation tubes 6 Reinstall PTC starter and wire according to wire diagram 7 Reinstall compressor cap 8 Reverse steps 1 through 8 of removal for remaini...

Page 22: ...Be sure to thoroughly flush the system and evacuate to 50 microns before weight charging If contamination was found or determined the evaporator should also be replaced at this time 4 1 Drain Valve T...

Page 23: ...and observing for any leaks from the tubing connections or the valve itself 4 2 Water Valve The water valve supplies water to the reservoir for producing ice The valve opens for 1 0 minutes during in...

Page 24: ...er supply line compression nut from the bottom of the water valve 5 Remove the two screws securing the water valve to the unit s support pan 6 Remove the water valve Installation Reverse the removal p...

Page 25: ...nser fan Installation Reverse the removal procedure for installation 5 2 Thermistors This unit utilizes two thermistors for reading temperatures for input to the electronic control Each thermistor has...

Page 26: ...eat sink compounds are Radio Shack part number 276 1372 General Electric part number 10 8108 To access and replace the evaporator thermistor 1 Remove any ice and drain the reservoir by pulling the dra...

Page 27: ...ermistor and sensing tube from the unit 2 Use a reference temperature point that is known such as an ice bath and measure the resistance across the wire leads 3 Check the recorded resistance with that...

Page 28: ...r switch Be sure to mark where these wires go for re assembly 4 Remove the drain valve 5 Disconnect the hot gas valve solenoid orange and white wires at the solenoid 6 Remove the hot gas valve solenoi...

Page 29: ...minal is not used If the resistance between the terminal of the plug is 5 0 5 9 ohms the grid cutter is good At any other resistance readings it will need to be replaced Check for continuity between t...

Page 30: ...moved it should be cleaned with ice machine cleaner Be sure to rinse the reservoir before re installing To remove the reservoir 1 From inside the unit remove the escutcheon panel 2 Remove the grid cut...

Page 31: ...cutter into the receptacle on the side of the liner Route the plug wire between the reservoir and liner This will keep it away from the path of the ice slab 9 Re install the escutcheon panel Adjustmen...

Page 32: ...Removal 1 Disconnect power to the icemaker 2 From inside the unit remove the escutcheon panel 3 Remove the grid cutter see section 6 1 4 Remove the ice deflector 5 Remove the reservoir see section 6 2...

Page 33: ...e wiring diagram for the ice maker 7 2 Point to Point Wire Layout The diagram on the following page figure 7 2 shows point to point termination This diagram is also located on the back panel of the un...

Page 34: ...Figure 7 2 35...

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