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Page 24

Page 24

REMOVAL AND REPLACEMENT PROCEDURES

WARNING - Disconnect electric power
supply to icemaker whenever replacement
procedure are performed.

WATER PUMP
1. Remove front panel.
2. Remove the control box cover.
3. Unplug pump from P.C. Board.
4. Remove screws holding pump bracket to the

right side of freezing compartment.

5. Pull pump forward and lift up.
6. Remove discharge hose from pump outlet.
Reverse to replace.

RESERVOIR
1. Close water valve on water supply line.
2. Remove front panel.
3. Remove evaporator front cover.
4. Remove reservoir drain plug and flush

reservoir out.

5. Remove screws securing reservoir.
6. Lift-up and pull forward to remove reservoir.
Reverse to replace.

DISTRIBUTOR/WATER TUBE
1. Remove front panel.
2. Remove evaporator front cover.
3. Locate water distributor at the top of the

evaporator.

4. Pull distributor forward to unsnap it from its

holdind clamps.

5. Remove hose clamp and water hose.
Reverse to replace.

OUTLET WATER VALVE
1. Remove front and right side panel.
2. Remove fan motor shroud.
3. Unplug water valve.
4. Remove clamp securing outlet tube to valve.
5. Remove hose clamp and hose from inlet

fitting.

6. Remove two screws and nuts securing valve

to its metal bracket and remove valve.

Reverse to replace.

COMPRESSOR
1. Remove top panel (if possible), front panel,

left side service panel and left fan motor
shroud.

2. Store refrigerant charge in liquid receiver.
3. Disconnect electrical lines from compressor.
4. Isolate parts to be opened from rest of the

system.

5. Remove compressor mounting bolts.
Reverse to reassemble.

CONDENSER - AIR COOLED
1. Remove both side panels and remove screws

of condenser bracket.

2. Store most of refrigerant charge in liquid

receiver.

3. Isolate parts to be opened from the rest of the

system.

4. Cut or unsweat liquid and discharge lines.
5. Unbolt and remove condenser from unit re-

ar side.

Reverse to reassemble.

CONDENSER - WATER COOLED
1. Shut-off water.
2. Remove front and left side panels.
3. Store most of refrigerant charge in liquid

receiver.

4. Isolate parts to be opened from the rest of the

system.

5. Unsweat water and refrigerant lines.
6. Unbolt and remove condenser.
Reverse to reassemble.

HOT GAS VALVE
1. Remove front, right side panel and right fan

motor shroud.

2. Unplug hot gas valve.
3. Purge system of refrigerant.
4. Cut or unsweat valve, remove from machine.
5. To replace, heat sinking the valve is CRITI-

CAL. Wrap the replacement valve in wet
rags, and sweat into place. Leave rags on
until joints cool.

Reverse steps 3-1 to reassemble.

WARNING - Be sure the electrical power
supply circuit breaker and the inlet water
supply are OFF, BEFORE starting any of
the folloving REMOVAL AND REPLACE-
MENT procedures as a precaution to
prevent possible personal injury or
damage to equipment.

REMOVAL AND REPLACEMENT OF THE
DRIER
To remove the drier:
1. Remove front and left side panel.
2. Remove screws and remove left side fan

motor shroud.

3. Store most of the refrigerant charge into  liquid

receiver.

4. Unsolder refrigeration lines at both ends of

the drier and remove the drier.

To replace the drier.

Summary of Contents for MV 12

Page 1: ...Page 1 Page 1 SERVICE MANUAL MV 12 MV 21 MV 32 MV 50 R 404 A VERSION Electronic modular cubers MS 1000 24 REV 03 00...

Page 2: ...the electrician Electrical connections 13 START UP Start up 15 16 OPERATION Refrigeration during freeze 17 Water system 18 Refrigeration system during harvest 19 Water system 19 Control sequence 20 S...

Page 3: ...periodic maintenance as outlined on page 29 of this manual ice making capacity 130 110 90 70 50 Kg 32 C 27 15 10 AIR COOLED MODELS WATER TEMPERATURE AMBIENT TEMPERATURE C 10 21 32 38 WATER COOLED MODE...

Page 4: ...NS Water req lt 24 HR Model Basic electr amps Start amps watts Electric power cons Kwhx24 HR N of wires Amps Fuse 220 240 50 1 MV 12 AS Air 190 MV 12 WS Water 1200 MV 12 AS MV 12 WS 4 0 3 8 20 20 750...

Page 5: ...c maintenance as outlined on page 29 of this manual ice making capacity 220 200 180 160 140 120 Kg 32 C 27 21 15 10 AIR COOLED MODELS WATER TEMPERATURE AMBIENT TEMPERATURE ICE PRODUCED PER 24 HRS C 10...

Page 6: ...E SPECIFICATIONS Water req lt 24 HR Model Basic electr amps Start amps watts Electric power cons Kwhx24 HR N of wires Amps Fuse 220 240 50 1 MV 21 AS Air 380 MV 21 WS Water 1800 MV 21 AS MV 21 WS 6 5...

Page 7: ...maintenance as outlined on page 29 of this manual ice making capacity 330 300 270 240 210 180 K g 32 C 27 21 15 10 AIR COOLED MODELS WATER TEMPERATURE AMBIENT TEMPERATURE ICE PRODUCED PER 24 HRS C 10...

Page 8: ...Cond unit Finish Comp HP MV 32 MACHINE SPECIFICATIONS Water req lt 24 HR Model Basic electr amps Start amps watts Electric power cons Kwhx24 HR N of wires Amps Fuse 220 240 50 1 MV 32 AS MV 32 WS 9 0...

Page 9: ...c maintenance as outlined on page 29 of this manual ice making capacity AIR COOLED MODELS AMBIENT TEMPERATURE ICE PRODUCED PER 24 HRS WATER COOLED MODELS AMBIENT TEMPERATURE ICE PRODUCED PER 24 HRS C...

Page 10: ...nd unit Finish Comp HP MV 50 MACHINE SPECIFICATIONS Water req lt 24 HR Model Cubes per harvest 578 Full 1156 Half With water at 15 C WATER INLET WATER COOLED ONLY MV 50 AS MV 50 WS Basic electr 400 50...

Page 11: ...190 the MV 21 32 stack onto SCOTSMAN bin model B 390 while the model MV 50 onto bin B 550 Refrigerant R 404 A Charge per nameplate rating STANDARD LEGS Furnished with storage bin Fourlegsscrewintomoun...

Page 12: ...tears in the machine mounting gasket with food grade silicone sealant ICE MACHINE The use of a mechanical lift is recommended for lifting the uncrated icemaker onto the bin Remove front top and sides...

Page 13: ...rompt reached Undersized wiring or unproperly installed electrical circuit will result in major problems and malfunctions Voltagevariationsshoudnotexceedtenpercent IMPORTANT All plumbing and electrica...

Page 14: ...5 bar 7 Have the compressor holddown bolts been checked to be sure the compressor is snug on the mounting pads 8 Check all refrigerant lines and conduit lines to gard against vibration and possible fa...

Page 15: ...so to avoid any possibility to such air cavitation NOTE Do not remove the evaporator deflector cover as it will cause the switching off of the machine at STORAGE BIN FULL 4 First freezing time will r...

Page 16: ...ions about the ice maker by the owner and inform the owner himseft of the name and telephone number of the authorized service agency serving him NOTE To assure a correct operation of the machine the w...

Page 17: ...ostatic expansion valve meters how much liquid refrigerant is to be allowed into the evaporator section of the refrigeration system This is determined by the temperature of the TXV sensing bulb locate...

Page 18: ...orator cells Most of the water returns to the reservoir to be sucked back into the pump and repumped over the evaporator WATER SYSTEM A mechanical float valve is used to control the level of the water...

Page 19: ...ing the harvest cycle the electric water drain valve is energized thereby opening the drain line All water remained in the reservoir at the end of freezing cycle is pumped out to the waste through the...

Page 20: ...es 40 minutes At this point the unit initiates the defrost cycle The hot gas circulating into the evaporator serpentine causes a slight melting of ice cubes whichgetreleasedfromtheirmolds Onceentirely...

Page 21: ...pressor amps will still decline as the machine freezes ice Disch Disch Suction Suction Amp Amp pressure pressure pressure pressure compr compr freeze freeze Beginning End Beginning End max min freeze...

Page 22: ...ectors for the sensors switches condenser sensor BLACK two magnetic switches BLUE ice thickness sensor RED of two jumpers one J1 for the selection betweenmodelsMV21 32 onemagneticswitch and the model...

Page 23: ...ining water from the sump reach in mineral salts 3 Compressor Contactor Located in the control box the compressor contactor functions to carry the compressor line current The contactor is wired to rec...

Page 24: ...rom compressor 4 Isolate parts to be opened from rest of the system 5 Remove compressor mounting bolts Reverse to reassemble CONDENSER AIR COOLED 1 Removebothsidepanelsandremovescrews of condenser bra...

Page 25: ...ke the frame of the evaporator plate The evaporator plate is now free To replace the evaporator plate reverse the removal procedures See nameplate Weight in proper charge of R 404 A in liquid phase WA...

Page 26: ...rosting switch two on MV 50 F Led card G Electronic card H Fan motor one on MV 12 and MV 50 K Water pump L Water dischargue electrovalve M Gas electrovalve N Max pressure switch O Max pressure switch...

Page 27: ...ration of fan motor s and condenser sensor Warning Red LIGHT ON Too high condensing pressure Check for correct operation of fan motor s No warning LED LIGHT ON P C Board inoperative Remove board and c...

Page 28: ...lace Condenser dirty Clean Low water flow Check and repair Water cooled High air temperature Check temperature of air air cooled entering condenser Machine makes irregular ice Low water supply Check F...

Page 29: ...openPosition for more that 30 shold cause the ice maker to shut off Once the evaporator deflector is released in its closed position the ice maker will restart 8 Check cube size adjust if required thr...

Page 30: ...ellow LED 7 Pushing the RESET BUTTON for 6 8 seconds the machine restarts in the freezing cycle 8 Replace the evaporator cover deflector and front panel 9 Check the next batch of cubes to be sure all...

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