Manitowoc QD0202A Service Manual Download Page 129

Page: 129 / 175

Section 7

Refrigeration System

Part No. 80-1100-3

7-17

ANALYZING DISCHARGE PRESSURE
DURING FREEZE OR HARVEST CYCLE

Procedure

1. Determine the ice machine operating conditions:

Air temp. entering condenser

______

Air temp. around ice machine

______

Water temp. entering sump trough

______

2. Refer to Operating Pressure Chart for ice machine

being checked. (These charts begin on

Page 7-33

Use the operating conditions determined in step 1 to
find the published normal discharge pressures.

Freeze Cycle _______

Harvest Cycle_______

3. Perform an actual discharge pressure check.

4. Compare the actual discharge pressure (step 3) with

the published discharge pressure (step 2).

The discharge pressure is normal when the actual
pressure falls within the published pressure range for the
ice machine’s operating conditions.

Freeze Cycle Discharge Pressure High Checklist

Freeze Cycle Discharge Pressure Low Checklist

NOTE: Do not limit your diagnosis to only the items listed in the checklists.

Freeze

Cycle PSIG

Harvest

Cycle PSIG

Beginning of Cycle

__________

Middle of Cycle

__________

End of Cycle

__________

Possible Cause

Check/Correct

Improper installation

See “Installation/Visual Inspection Checklist” on

Page 7-10

Restricted condenser air flow (air-cooled models)

High inlet air temperature (110°F/43.3°C max.)

Condenser discharge air recirculation
Dirty condenser filter
Dirty condenser fins

Defective fan cycling control
Defective fan motor

Restricted condenser water flow (water-cooled
models)

Low water pressure (20 psi min.)
High inlet water temperature (90°F/32.2°C max.)

Dirty condenser
Dirty/defective water regulating valve
Water regulating valve out of adjustment

Improper refrigerant charge

Overcharged
Non-condensables in system

Wrong type of refrigerant

Other

Non-Manitowoc components in system

High side refrigerant lines/component restricted (before mid-condenser)
Defective head pressure control valve (remote models)

Possible Cause

Check/Correct

Improper installation

See “Installation/Visual Inspection Checklist” on

Page 7-10

Improper refrigerant charge

Undercharged

Wrong type of refrigerant

Water regulating valve (water-cooled condensers)

Out of adjustment

Defective

Other

Non-Manitowoc components in system

Defective head pressure control valve (remote models)

Defective fan cycle control

Summary of Contents for QD0202A

Page 1: ...ICE MACHINES Q Model Service Manual Service Manual Service Manual C 2004 Manitowoc Ice Inc 80 1597 3 6 04 ...

Page 2: ...ral notices NOTE Text set off as a Note provides you with simple but useful extra information about the procedure you are performing Warning PERSONAL INJURY POTENTIAL Do not operate equipment that has been misused abused neglected damaged or altered modified from that of original manufactured specifications Warning Text in a Warning box alerts you to a potential personal injury situation Be sure t...

Page 3: ......

Page 4: ...n a Variety of Equipment Breakfast Lunch and Hotel Room Included with Tuition Contact Your Distributor or Manitowoc Ice Inc for Details OR Visit Our Website at www manitowocice com for School Dates MANITOWOC ICE INC 2110 South 26th Street P O Box 1720 Manitowoc WI 54221 1720 Phone 920 682 0161 Service Fax 920 683 7585 Web Site www manitowocice com 2003 Manitowoc Ice Inc Litho in U S A ...

Page 5: ... Storage Bin Dimensions 2 3 S170 S400 S570 Ice Storage Bins 2 3 S320 S420 Ice Storage Bins 2 3 S970 Ice Storage Bins 2 4 Remote Condenser Dimensions 2 4 JC0495 JC0895 JC1095 JC1395 2 4 JC1895 2 4 Location of Ice Machine 2 5 Stacking Two Ice Machines on a Single Storage Bin 2 5 Ice Machine Heat of Rejection 2 5 Leveling the Ice Storage Bin 2 6 Air Cooled Baffle 2 6 Electrical Service 2 7 General 2 ...

Page 6: ...ng Remote Condenser Installation Distances 2 15 Lengthening or Reducing Line Set Lengths 2 16 Connecting A Line Set 2 16 Remote Receiver Service Valve 2 16 Remote Ice Machine Usage with Non Manitowoc Multi Circuit Condensers 2 17 Warranty 2 17 Head Pressure Control Valve 2 17 Fan Motor 2 17 Internal Condenser Volume 2 17 Condenser DT 2 17 Refrigerant Charge 2 17 Quick Connect Fittings 2 17 Non Man...

Page 7: ...00 Q1600 Q1800 4 1 Initial Start Up or Start Up After Automatic Shut Off 4 1 Freeze Sequence 4 1 Harvest Sequence 4 2 Automatic Shut Off 4 2 Remote Q450 Q600 Q800 Q1000 Q1300 Q1600 Q1800 4 3 Initial Start Up or Start Up After Automatic Shut Off 4 3 Freeze Sequence 4 3 Harvest Sequence 4 4 Automatic Shut Off 4 4 Section 5 Water System Ice Making Sequence of Operation Initial Start Up or Start Up Af...

Page 8: ...Phase Without Terminal Board 6 30 Q800 Q1000 Remote 3 Phase With Terminal Board 6 31 Q800 Q1000 Remote 3 Phase Without Terminal Board 6 32 Q1300 Q1800 Remote 1 Phase With Terminal Board 6 33 Q1300 Q1600 Q1800 Remote 1 Phase Without Terminal Board 6 34 Q1300 Q1800 Remote 3 Phase With Terminal Board 6 35 Q1300 Q1600 Q1800 Remote 3 Phase Without Terminal Board 6 36 Component Specifications and Diagno...

Page 9: ... Single Expansion Valve Ice Machines Comparing Evaporator Inlet and Outlet Temperatures 7 20 Harvest Valve Temperature Check 7 21 Discharge Line Temperature Analysis 7 22 How to Use the Refrigeration System Operational Analysis Tables 7 24 Refrigeration System Operational Analysis Tables 7 25 Harvest Pressure Regulating H P R System 7 27 Headmaster Control Valve 7 29 Pressure Control Specification...

Page 10: ... Model Procedures 7 46 Normal Remote Model Procedures 7 48 System Contamination Clean Up 7 52 Replacing Pressure Controls Without Removing Refrigerant Charge 7 54 Filter Driers 7 56 Total System Refrigerant Charges 7 56 Refrigerant Definitions 7 57 Refrigerant Re Use Policy 7 58 HFC Refrigerant Questions and Answers 7 59 ...

Page 11: ...Y1004A QR1001W QD1003W QY1005W QR1090N QD1092N QY1094N QR1300A QD1302A QY1304A QR1301W QD1303W QY1305W QR1390N QD1392N QY1394N QD1603W QY1605W QD1692N QY1694N QR1800A QD1802A QY1804A QR1801W QD1803W QY1805W QR1890N QD1892N QY1894N Warning PERSONAL INJURY POTENTIAL Do not operate equipment that has been misused abused neglected damaged or altered modified from that of original manufactured specific...

Page 12: ... numbers are required when requesting information from your local Manitowoc distributor or Manitowoc Ice Inc The model and serial number are listed on the MODEL SERIAL NUMBER DECAL affixed to the ice machine remote condenser and storage bin Figure 1 1 Model Serial Number Location SV1600 ...

Page 13: ...rized modifications to the ice machine or use of non standard parts without prior written approval from Manitowoc Ice Inc 3 Damage caused by improper installation of the ice machine electrical supply water supply or drainage or damage caused by floods storms or other acts of God 4 Premium labor rates due to holidays overtime etc travel time flat rate service call charges mileage and miscellaneous ...

Page 14: ...General Information Section 1 1 4 Part No 80 1100 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 15: ...or complete installation guidelines Ice Machine Dimensions Q320 Q370 Q420 ICE MACHINES Important Failure to follow these installation guidelines may affect warranty coverage SV1602 SV1611 WATER COOLED AIR COOLED Ice Machine Dimension H Q320 21 5 in 54 6 cm Q370 21 5 in 54 6 cm Q420 26 5 in 67 3 cm ...

Page 16: ...SV1612 SV1628 WATER COOLED SELF CONTAINED AIR COOLED Ice Machine Dimension H Q200 Q280 16 5 in 41 9 cm Q450 21 5 in 54 6 cm Q600 21 5 in 54 6 cm Q800 26 5 in 67 3 cm Q1000 29 5 in 74 9 cm SV1613 AIR COOLED Ice Machine Dimension H Q1300 Q1600 29 5 in 74 9 cm Q1800 29 5 in 74 9 cm SV1627 SELF CONTAINED WATER COOLED ...

Page 17: ...ICE STORAGE BINS S320 S420 ICE STORAGE BINS SV1629 REMOTE AIR COOLED Bin Model Dimension A Dimension B S170 29 5 in 74 9 cm 19 1 in 48 5 cm S400 34 0 in 86 3 cm 32 0 in 81 3 cm S570 34 0 in 86 3 cm 44 0 in 111 7 cm Bin Model Dimension A Dimension B S320 34 0 in 86 3 cm 32 0 in 81 3 cm S420 34 0 in 86 3 cm 44 0 in 111 7 cm SV1609 SV1614 ...

Page 18: ...tem bin dispenser etc to incorporate an ice deflector The Q1300 Q1600 and Q1800 series ice machines require adding Manitowoc Ice Deflector Kit K00139 when installing with non Manitowoc ice storage systems Prior to using a non Manitowoc ice storage system with other Manitowoc ice machines contact the manufacturer to assure their ice deflector is compatible with Manitowoc ice machines SV1610 SV1297 ...

Page 19: ... water cooled condenser Use the peak figure for sizing the cooling tower Q1300 Q1600 Q1800 Self Contained Air Cooled Water Cooled and Remote Top Sides 24 61 cm 8 20 3 cm Back 12 30 5 cm 5 12 7 cm Q370 Self Contained Air Cooled Water Cooled Top Sides 12 30 5 cm 5 12 7 cm Back 5 127 mm 5 12 7 cm All other Q models Self Contained Air Cooled Water Cooled and Remote Top Sides 8 20 3 cm 8 20 3 cm Back 5...

Page 20: ...nal caster assembly is available for use in place of the legs Installation instructions are supplied with the casters Figure 2 1 Leveling Leg and Foot Air Cooled Baffle The air cooled baffle prevents condenser air from recirculating To install 1 Remove the back panel screws next to the condenser 2 Align the mounting holes in the air baffle with the screw holes and reinstall the screws Figure 2 2 A...

Page 21: ...ust be H A C R rated does not apply in Canada MINIMUM CIRCUIT AMPACITY The minimum circuit ampacity is used to help select the wire size of the electrical supply Minimum circuit ampacity is not the ice machine s running amp load The wire size or gauge is also dependent upon location materials used length of run etc so it must be determined by a qualified electrician Warning All wiring must conform...

Page 22: ...5 4 15 4 8 N A N A 230 1 50 15 5 2 15 4 9 N A N A Q280 115 1 60 20 12 6 20 11 7 N A N A 208 230 1 60 15 5 7 15 5 2 N A N A 230 1 50 15 5 7 15 5 2 N A N A Q450 115 1 60 20 12 8 20 11 9 20 13 6 208 230 1 60 15 7 8 15 7 4 N A N A 230 1 50 15 6 1 15 5 7 N A N A Q600 208 230 1 60 15 9 2 15 8 7 15 9 3 230 1 50 15 9 2 15 8 8 15 9 4 Q800 208 230 1 60 20 12 1 20 11 4 20 11 9 208 230 3 60 15 8 9 15 8 2 15 8...

Page 23: ...D ICE MACHINE CONNECTIONS SV1258 L1 L1 GROUND GROUND ICE MACHINE CONNECTIONS TO SEPARATE FUSE BREAKER L2 L3 L2 L3 SV1190 L1 L1 N N GROUND GROUND ICE MACHINE CONNECTIONS TO SEPARATE FUSE BREAKER DISCONNECT ALL POLES SV1191 For United Kingdom Only As the colours of the wires in the mains lead of the appliance may not correspond with the coloured markings identifying the terminals in your plug procee...

Page 24: ...form to local state and national electrical codes Though wire nuts are shown in the drawings the ice machine field wiring connections may use either wire nuts or screw terminals L1 NOTE CONDENSER FAN MOTOR VOLTAGE MATCHES ICE MACHINE VOLTAGE 115V OR 208 230V GROUND SINGLE CIRCUIT REMOTE CONDENSER ICE MACHINE SV1255 L2 L1 L2 GROUND TO SEPARATE FUSE BREAKER GROUND L1 L2 F2 F1 N 115V OR L2 208 230V G...

Page 25: ...st not create traps The floor drain must be large enough to accommodate drainage from all drains Run separate bin and ice machine drain lines Insulate them to prevent condensation Vent the bin and ice machine drain to the atmosphere Do not vent the condenser drain on water cooled models Cooling Tower Applications Water Cooled Models A water cooling tower installation does not require modification ...

Page 26: ... F 0 6 C Min 90 F 32 2 C Max 20 psi 137 9 kPA Min 80 psi 551 5 kPA Max 3 8 Female Pipe Thread 3 8 9 5 mm minimum inside diameter Ice Making Water Drain 1 2 Female Pipe Thread 1 2 12 7 mm minimum inside diameter Condenser Water Inlet 33 F 0 6 C Min 90 F 32 2 C Max 20 psi 137 9 kPA Min 150 psi 1034 2 kPA Max Q1300 Q1600 Q1800 1 2 Female Pipe Thread All Others 3 8 Female Pipe Thread Condenser Water D...

Page 27: ...Q1890 JC1895 Line Set Discharge Line Liquid Line RT 1 2 1 27 cm 5 16 79 cm RL 1 2 1 27 cm 3 8 95 cm Air Temperature Around the Condenser Minimum Maximum 20 F 28 9 C 120 F 49 C IMPORTANT EPA CERTIFIED TECHNICIANS If remote line set length is between 50 and 100 15 25 30 5 m add 1 5 lb 24 oz 0 68 kg of refrigerant to the nameplate charge Tubing length ______________________________ Refrigerant added ...

Page 28: ...ional Make the service loop in the line sets See Figure 2 5 This permits easy access to the ice machine for cleaning and service Do not use hard rigid copper at this location 2 Required Do not form traps in the refrigeration lines except the service loop Refrigerant oil must be free to drain toward the ice machine or the condenser Route excess tubing in a supported downward horizontal spiral See F...

Page 29: ...eet 2 Insert the measured drop into the formula below Multiply by 6 6 to get the calculated drop Example A condenser located 10 feet below the ice machine has a calculated drop of 66 feet 3 Insert the measured horizontal distance into the formula below No calculation is necessary 4 Add together the calculated rise calculated drop and horizontal distance to get the total calculated distance If this...

Page 30: ...ine set condenser and ice machine 2 Apply refrigeration oil to the threads on the quick disconnect couplers before connecting them to the condenser 3 Carefully thread the female fitting to the condenser or ice machine by hand 4 Tighten the couplings with a wrench until they bottom out 5 Turn an additional 1 4 turn to ensure proper brass to brass seating Torque to the following specifications 6 Che...

Page 31: ...circuit be used to control the condenser fan s on the multi circuit condenser to assure it is on at the proper time Do not exceed the rated amps for the fan motor circuit listed on the ice machine s serial tag INTERNAL CONDENSER VOLUME The multi circuit condenser internal volume must not be less than or exceed that used by Manitowoc see chart on Page 2 18 Do not exceed internal volume and try to a...

Page 32: ... Q800 R 404A 8 lbs 12 400 19 500 0 045 0 060 2 500 psig burst pressure mounting flange P N 83 6006 3 mounting flange P N 83 6005 3 no substitutes Q1000 R 404A 9 5 lbs 16 000 24 700 0 065 0 085 Q1300 R 404A 14 lbs 1 24 000 35 500 0 085 0 105 Q1600 R 404A 17 lbs 1 36 000 50 000 0 130 0 170 Q1800 R 404A 17 lbs Amount reflects additional R 404A refrigerant added to nameplate charge for 50 to 100 line ...

Page 33: ...g is taped to the top of the water pump Are the ice machine and bin drains vented Are all electrical leads free from contact with refrigeration lines and moving equipment Has the owner operator been instructed regarding maintenance and the use of Manitowoc Cleaner and Sanitizer Has the owner operator completed the warranty registration card Has the ice machine and bin been sanitized Is the toggle ...

Page 34: ...Installation Instructions Section 2 2 20 Part No 80 1100 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 35: ... COOLED MODEL CONDENSER WATER REGULATING VALVE WATER CONDENSER ICE THICKNESS PROBE EVAPORATOR HIGH PRESSURE CUTOUT MANUAL RESET When applicable WATER CURTAIN WATER TROUGH ICE OFF CLEAN SWITCH WATER PUMP BIN SWITCH DISTRIBUTION TUBE SV1604G SV1605 HARVEST VALVE AIR CONDENSER REMOTE COUPLINGS COMPRESSOR DRAIN HOSE WATER DUMP VALVE ...

Page 36: ... level probe for damage probe bent etc Repair or replace the probe as necessary Figure 3 2 Water Level Probe ICE THICKNESS CHECK The ice thickness probe is factory set to maintain the ice bridge thickness at 1 8 3 2 mm NOTE Make sure the water curtain is in place when performing this check It prevents water from splashing out of the water trough 1 Inspect the bridge connecting the cubes It should ...

Page 37: ...d shortens component life Clean the condenser at least every six months Follow the steps below 1 The washable aluminum filter on self contained ice machines is designed to catch dust dirt lint and grease This helps keep the condenser clean Clean the filter with a mild soap and water solution Figure 3 5 Self Contained Air Cooled Filter 2 Clean the outside of the condenser bottom of a remote condens...

Page 38: ... fan blades are excessively dirty wash with warm soapy water and rinse thoroughly WATER COOLED CONDENSER AND WATER REGULATING VALVE Symptoms of restrictions in the condenser water circuit include Low ice production High water consumption High operating temperatures High operating pressures If the ice machine is experiencing any of these symptoms the water cooled condenser and water regulating valv...

Page 39: ...itiates a cleaning or sanitizing cycle automatically Refer to Automatic Cleaning System AuCS Accessory for further details ALPHASAN The goal of AlphaSan is to keep the plastic surfaces of an ice machine cleaner by reducing or delaying the formation of bio film The active ingredient in AlphaSan is the element silver in the form of silver ions Ag AlphaSan slowly releases silver ions via an ion excha...

Page 40: ...e cleaning cycle followed by six rinse cycles and stop The Clean light will turn off to indicate the Cleaning mode is completed This entire cycle lasts approximately 25 minutes Step 6 When the cleaning process stops move the toggle switch to OFF position Refer to Sanitizing Procedure on the next page Step 7 A The ice machine may be set to start and finish a cleaning procedure then automatically st...

Page 41: ...er and sanitizer Step 4 Use the sanitizing solution and a sponge or cloth to sanitize wipe all parts and interior surfaces of the ice machine Sanitize the following areas A Side walls B Base area above water trough C Evaporator plastic parts D Bin or dispenser Step 5 Rinse all sanitized areas with clear water Step 6 Install the removed parts restore power and place toggle switch in the ice positio...

Page 42: ...e and down the drain The Clean light will turn on to indicate the ice machine is in the Self Cleaning mode The AuCS then automatically adds cleaner or sanitizer to the ice machine Step 3 The ice machine will automatically time out a ten minute cleaning or sanitizing cycle followed by six rinse cycles de energize the Clean light and stop This entire cycle lasts approximately 25 minutes Step 4 After...

Page 43: ... removed parts NOTE Incomplete rinsing of the ice thickness probe or water level probe may leave a residue This could cause the ice machine to malfunction For best results brush or wipe the probes off while rinsing it Thoroughly dry the probes before installing them 8 Turn on the water and electrical supply Warning Disconnect electric power to the ice machine at the electric switch box before proc...

Page 44: ...d the enclosing tube 4 Press down on the plastic nut on the enclosing tube and rotate it 1 4 turn Remove the enclosing tube plunger and plastic gasket from the valve body NOTE At this point the water dump valve can easily be cleaned If complete removal is desired continue with step 5 Figure 3 7 Dump Valve Removal NOTE During cleaning do not stretch damage or remove the spring from the plunger If i...

Page 45: ... to 16 ounces of water in a container 2 Soak ice thickness probe in container of cleaner water solution while disassembling and cleaning water circuit components soak ice thickness probe for 10 minutes or longer 3 Clean all ice thickness probe surfaces including all plastic parts do not use abrasives Verify the ice thickness probe cavity is clean Thoroughly rinse ice thickness probe including cavi...

Page 46: ...the water flow is slow or only trickles into the ice machine remove disassemble and clean the valve Follow the procedure below to remove the water inlet valve 1 Remove the valve shield if necessary 2 Remove the filter access screws that hold the valve in place NOTE The water inlet valve can be disassembled and cleaned without disconnecting the incoming water supply line to the ice machine 3 Remove...

Page 47: ...of the inner tube ends until the tabs line up with the keyways B Pull the inner tube ends outward Figure 3 15 Water Distribution Tube Disassembly Water Curtain 1 Gently flex the curtain in the center and remove it from the right side Figure 3 16 Water Curtain Removal 2 Slide the left pin out Caution Do not force this removal Be sure the locating pin is clear of the hole before sliding the distribu...

Page 48: ...ltration System 2 Depress the pressure release button to relieve the pressure 3 Unscrew the housing from the cap 4 Remove the used filter cartridge from the housing and discard it 5 Remove the O ring from the housing groove Wipe the housing groove and the O ring clean 6 Lubricate the O ring with petroleum jelly 7 Press the O ring into the housing groove 8 Insert a new filter cartridge into the hou...

Page 49: ...ter lines drain lines distribution tubes etc WATER COOLED ICE MACHINES 1 Perform steps 1 6 under Self Contained Air Cooled Ice Machines 2 Disconnect the incoming water and drain lines from the water cooled condenser 3 Insert a large screwdriver between the bottom spring coils of the water regulating valve Pry upward to open the valve Figure 3 18 Pry Open the Water Regulating Valve 4 Hold the valve...

Page 50: ...Maintenance Section 3 3 16 Part No 80 1100 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 51: ... harvest valve s remains on for 5 seconds during initial compressor start up and then shuts off At the same time the compressor starts the condenser fan motor air cooled models is supplied with power throughout the entire Freeze and Harvest Sequences The fan motor is wired through a fan cycle pressure control therefore it may cycle on and off The compressor and condenser fan motor are wired throug...

Page 52: ...lve s remains open and the refrigerant gas warms the evaporator causing the cubes to slide as a sheet off the evaporator and into the storage bin The sliding sheet of cubes swings the water curtain out opening the bin switch The momentary opening and re closing of the bin switch terminates the harvest sequence and returns the ice machine to the freeze sequence Step 3 4 Figure 4 2 Harvest Sequence ...

Page 53: ...xpired See Water Inlet Valve Safety Shutoff Page 6 50 The harvest valve and HPR solenoid valves remain on for 5 seconds during initial compressor start up and then shut off The remote condenser fan motor starts at the same time the compressor starts and remains on throughout the entire Freeze and Harvest Sequences The compressor and condenser fan motor are wired through the contactor therefore any...

Page 54: ... s remain open and the refrigerant gas warms the evaporator causing the cubes to slide as a sheet off the evaporator and into the storage bin The sliding sheet of cubes swings the water curtain out opening the bin switch The momentary opening and re closing of the bin switch terminates the harvest sequence and returns the ice machine to the freeze sequence Step 3 4 Figure 4 5 Harvest Sequence Typi...

Page 55: ...nds of the freeze cycle 3 The water pump starts after the 30 second pre chill An even flow of water is directed across the evaporator and into each cube cell During the first 45 seconds of the Freeze Cycle the water fill valve cycles on and off as many times as needed to refill the water trough After the 45 seconds the water fill valve cycles on and off one more time to refill the water trough The...

Page 56: ...The water fill valve energizes for the last 15 seconds of the 45 second purge cycle to flush sediment from the bottom of the water trough 5 After the 45 second purge the water pump and water dump valve de energize AUTOMATIC SHUT OFF There is no water flow during an automatic shut off Figure 5 2 Water Flow Down the Drain SV1677 TO DRAIN WATER DUMP VALVE TO DISTRIBUTION TUBE WATER PUMP WATER INLET V...

Page 57: ...ce steps 5 6 HARVEST SEQUENCE The maximum harvest time is 3 1 2 minutes at which time the control board automatically terminates the harvest sequence If the bin switch is open the ice machine will go to automatic shut off step 7 If the bin switch is closed the ice machine will go to the freeze sequence steps 3 4 Ice Making Sequence Of Operation Control Board Relays Contactor Length Of Time 1 2 3 4...

Page 58: ...es at which time the control board automatically terminates the harvest sequence If the bin switch is open the ice machine will go to automatic shut off step 7 If the bin switch is closed the ice machine will go to the freeze sequence steps 3 4 Ice Making Sequence Of Operation Control Board Relays Contactor Length Of Time 1 2 3 4 5 5A 5B Water Pump Water Fill Valve a Harvest Valve s Water Dump Val...

Page 59: ...osed ON 4 Water Dump Valve Closed ON 5 Contactor Coil Open OFF Compressor OFF Condenser Fan Motor OFF Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed OVERLOAD FAN CYCLE CONTROL BIN SWITCH TB35 TB33 52 51 48 CONTACTOR CONTACTS L1 42 66 64 ICE THICKNESS PROBE WATER LEVEL PROBE NOT USED TB35 HIGH PRES CUTOUT TB32 L1 55 RUN CAPACITO...

Page 60: ...ls 2 Refrigeration System Start Up 5 Seconds Toggle Switch ICE Bin Switch Closed Control Board Relays 1 Water Pump Open OFF 2 Water Fill Valve Closed ON 3 Harvest Solenoid Closed ON 4 Water Dump Valve Open OFF 5 Contactor Coil Closed ON Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed OVERLOAD...

Page 61: ... operation High Pressure Cut Out Closed Main Fuse On Control Board Closed OVERLOAD FAN CYCLE CONTROL BIN SWITCH TB35 TB33 52 51 48 CONTACTOR CONTACTS L1 42 66 64 ICE THICKNESS PROBE WATER LEVEL PROBE NOT USED TB35 HIGH PRES CUTOUT TB32 L1 55 RUN CAPACITOR RUN CAPACITOR C S TB34 53 47 85 86 COMPRESSOR R FAN MOTOR AIR COOLED ONLY R R 45 46 50 PTCR BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIG...

Page 62: ... ON then OFF 3 Harvest Solenoid Open OFF 4 Water Dump Valve Open OFF 5 Contactor Coil Closed ON Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed OVERLOAD FAN CYCLE CONTROL BIN SWITCH TB35 TB33 52 51 48 CONTACTOR CONTACTS L1 42 66 64 ICE THICKNESS PROBE WATER LEVEL PROBE NOT USED TB35 HIGH PRES...

Page 63: ... 5 Water Purge 45 Seconds Toggle Switch ICE Bin Switch Closed Control Board Relays 1 Water Pump Closed ON 2 Water Fill Valve Cycles OFF then ON 3 Harvest Solenoid Closed ON 4 Water Dump Valve Closed ON 5 Contactor Coil Closed ON Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed OVERLOAD FAN CYC...

Page 64: ...tor Coil Closed ON Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed OVERLOAD FAN CYCLE CONTROL BIN SWITCH TB35 TB33 52 51 48 CONTACTOR CONTACTS L1 42 66 64 ICE THICKNESS PROBE WATER LEVEL PROBE NOT USED TB35 HIGH PRES CUTOUT TB32 L1 55 RUN CAPACITOR RUN CAPACITOR C S R TB34 53 47 85 86 COMPRES...

Page 65: ...ump Open OFF 2 Water Fill Valve Open OFF 3 Harvest Solenoid Open OFF 4 Water Dump Valve Open OFF 5 Contactor Coil Open OFF Compressor OFF Condenser Fan Motor OFF Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed OVERLOAD FAN CYCLE CONTROL BIN SWITCH TB35 TB33 52 48 CONTACTOR CONTACTS L1 42 51 64 66 ICE THICKNESS PROBE WATER LEVEL ...

Page 66: ...ater Dump Valve Closed ON 5 Contactor Coil Open OFF Liquid Line Solenoid De energized Compressor OFF Condenser Fan Motor OFF Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed TERMINATES AT PIN CONNECTION OVERLOAD BIN SWITCH ICE THICKNESS PROBE F1 TB33 52 51 48 TB35 L1 42 CONTACTOR CONTACTS 66 WATER LEVEL PROBE NOT USED 64 TB32 TB3...

Page 67: ...sed ON 3 Harvest Solenoid Closed ON Harvest Pressure Regulating HPR Solenoid Closed ON 4 Water Dump Valve Open OFF 5 Contactor Coil Closed ON Liquid Line Solenoid Energized Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed TERMINATES AT PIN CONNECTION OVERLOAD BIN SWITCH ICE THICKNESS PROBE F1 ...

Page 68: ...d stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed TERMINATES AT PIN CONNECTION OVERLOAD BIN SWITCH ICE THICKNESS PROBE F1 TB33 52 51 48 TB35 L1 42 CONTACTOR CONTACTS 66 WATER LEVEL PROBE NOT USED 64 TB32 TB35 L1 55 HIGH PRES CUTOUT 74 73 REMOTE FAN MOTOR RUN CAPACITOR PTCR TB34 53 REMOTE CONDENSER F2 45 TB30 BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE...

Page 69: ...ing HPR Solenoid Open OFF 4 Water Dump Valve Open OFF 5 Contactor Coil Closed ON Liquid Line Solenoid Energized Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed TERMINATES AT PIN CONNECTION OVERLOAD BIN SWITCH ICE THICKNESS PROBE F1 TB33 52 51 48 TB35 L1 42 CONTACTOR CONTACTS 66 64 WATER LEVEL...

Page 70: ...Closed Control Board Relays 1 Water Pump Closed ON 2 Water Fill Valve Cycles OFF then ON 3 Harvest Solenoid Closed ON Harvest Pressure Regulating HPR Solenoid Closed ON 4 Water Dump Valve Closed ON 5 Contactor Coil Closed ON Liquid Line Solenoid Energized Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Bo...

Page 71: ... Coil Closed ON Liquid Line Solenoid Energized Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed TERMINATES AT PIN CONNECTION OVERLOAD BIN SWITCH ICE THICKNESS PROBE F1 TB33 52 51 48 TB35 L1 42 CONTACTOR CONTACTS 66 64 WATER LEVEL PROBE NOT USED TB32 TB35 L1 55 HIGH PRES CUTOUT 73 74 REMOTE FAN...

Page 72: ...rvest Pressure Regulating HPR Solenoid Open OFF 4 Water Dump Valve Open OFF 5 Contactor Coil Open OFF Liquid Line Solenoid De energized Compressor ON Condenser Fan Motor ON Safety Controls Which could stop ice machine operation High Pressure Cut Out Closed Main Fuse On Control Board Closed TERMINATES AT PIN CONNECTION OVERLOAD BIN SWITCH ICE THICKNESS PROBE F1 TB33 52 51 48 TB35 L1 42 CONTACTOR CO...

Page 73: ...f the wiring diagrams Internal Compressor Overload Some models have external compressor overloads Fan Motor Run Capacitor Some models do not incorporate fan motor run capacitor TB Terminal Board Connection Terminal board numbers are printed on the actual terminal board Wire Number Designation The number is marked at each end of the wire Multi Pin Connection Electrical Box Side Compressor Compartme...

Page 74: ...CH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT TB35 TB30 CONTACTOR CONTACTS L1 42 COMPRESSOR FAN CYCLE CONTROL FAN MOTOR AIR COOLED ONLY RUN CAPACITOR L2 N SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION PTCR TB30 TB30 LOW D C VOLTAGE PLUG 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE SWITCH 68 ...

Page 75: ...ITCH LIGHT CLEAN OFF ICE 68 69 62 49 47 COMPRESSOR OVERLOAD INTERNAL 230V 50 60 HZ R C S 86 85 51 48 CONTACTOR CONTACTS 42 L1 FAN CYCLE CONTROL RUN CAPACITOR FAN MOTOR AIR COOLED ONLY 50 62 66 VIEW FOR WIRING 67 68 69 SEE SERIAL PLATE FOR VOLTAGE L2 N 74 TERMINATES AT PIN CONNECTION 59 58 56 98 DUMP SOLENOID 57 81 99 75 80 76 HARVEST SOLENOID 77 WATER VALVE 21 22 60 61 55 HIGH PRES CUTOUT L1 WATER...

Page 76: ...ITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG CONTACTOR CONTACTS L1 42 COMPRESSOR COMPRESSOR RUN CAPACITOR FAN CYCLE CONTROL FAN MOTOR AIR COOLED ONLY RUN CAPACITOR L2 N SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION PTCR PTCR 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGL...

Page 77: ...ES CUTOUT BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG TB35 TB30 CONTACTOR CONTACTS L1 42 COMPRESSOR RUN CAPACITOR FAN CYCLE CONTROL FAN MOTOR AIR COOLED ONLY RUN CAPACITOR L2 N SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION PTCR TB30 64 63 BIN SWITCH 62 66 65...

Page 78: ...PRES CUTOUT BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG CONTACTOR CONTACTS L1 42 COMPRESSOR FAN CYCLE CONTROL FAN MOTOR AIR COOLED ONLY RUN CAPACITOR L2 N SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION PTCR 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE SWITCH 68 ...

Page 79: ...ORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION 61 60 57 58 1F 1C 4 1 3 5 FUSE 7A TRANS 56 ICE THICKNESS PROBE TB30 BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG TB32 TB35 TB34 53 TB33 52 HIGH PRES CUTOUT L1 96 42 COMPRESSOR L3 L2 L1 L2 L3 TB35 T2 T3 T1 55 TB30 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE SWITCH 68 67 69 66 6...

Page 80: ...CH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG CONTACTOR CONTACTS L1 L2 L3 T2 T1 T3 FAN CYCLE CONTROL FAN MOTOR AIR COOLED ONLY RUN CAPACITOR SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE SWITCH 68 67 69 66 62 ICE OFF CLEAN 62 ...

Page 81: ...IT CODE LIGHT LOW D C VOLTAGE PLUG TB35 TB30 CRANKCASE HEATER 94 95 TB35 TB30 CONTACTOR CONTACTS CONTACTOR CONTACTS L2 L1 96 42 COMPRESSOR RUN CAPACITOR FAN CYCLE CONTROL FAN MOTOR AIR COOLED ONLY RUN CAPACITOR L2 N SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION PTCR 44 64 63 BIN SWITCH 62 ...

Page 82: ... LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG CONTACTOR CONTACTS CONTACTOR CONTACTS L1 L2 COMPRESSOR CRANKCASE HEATER RUN CAPACITOR FAN CYCLE CONTROL FAN MOTOR AIR COOLED ONLY RUN CAPACITOR L2 N SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION PTCR 64 63 BIN SWITCH 62 66 65 69 67 68 TOG...

Page 83: ...FREEZE CYCLE TERMINATES AT PIN CONNECTION 61 60 57 58 1F 1C 4 1 3 5 FUSE 7A TRANS 56 ICE THICKNESS PROBE TB30 BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT TB32 TB35 TB34 53 TB33 52 HIGH PRES CUTOUT TB35 CRANKCASE HEATER 94 95 L1 96 42 COMPRESSOR L3 L2 L1 L2 L3 TB35 T2 T3 T1 55 LOW D C VOLTAGE PLUG 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE SWITCH 68 67 69 66 62 ICE OFF CLEAN 66 62 VIEW FO...

Page 84: ...RING FREEZE CYCLE TERMINATES AT PIN CONNECTION 61 60 57 59 58 1F 1C 4 2 1 5 FUSE 7A TRANS 56 ICE THICKNESS PROBE BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT 51 HIGH PRES CUTOUT CRANKCASE HEATER 94 95 CONTACTOR CONTACTS L1 96 COMPRESSOR L3 L2 L1 L2 L3 T2 T3 T1 LOW D C VOLTAGE PLUG 64 88 89 55 42 63 BIN SWITCH 62 65 69 67 68 TOGGLE SWITCH 68 67 69 66 62 ICE OFF CLEAN 66 62 VIEW FOR WIRING...

Page 85: ...ITRY DIAGRAM SHOWN DURING FREEZE CYCLE REMOTE CONDENSER TERMINATES AT PIN CONNECTION F1 F2 61 60 57 58 1F 1C 4 1 3 FUSE 7A TRANS 56 ICE THICKNESS PROBE TB30 BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT 74 73 TB30 CONTACTOR COIL R R C S R TB34 OVERLOAD 53 TB33 52 51 48 45 46 50 49 47 TB35 CONTACTOR CONTACTS L1 42 COMPRESSOR RUN CAPACITOR PTCR TB30 TB30 LOW D C VOLTAGE PLUG 64 63 BIN SWITC...

Page 86: ...TOUT BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG CONTACTOR CONTACTS L1 COMPRESSOR RUN CAPACITOR LIQUID LINE SOLENOID REMOTE FAN MOTOR REMOTE CONDENSER RUN CAPACITOR L2 N SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE PTCR F1 F2 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE SWITCH 68 67 69 66...

Page 87: ... VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE REMOTE CONDENSER L3 L2 L1 L2 L3 TB35 T2 T3 T1 TERMINATES AT PIN CONNECTION F1 F2 61 60 57 58 1F 1C 4 1 3 5 FUSE 7A TRANS 56 ICE THICKNESS PROBE TB30 BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG 74 73 TB30 CONTACTOR COIL 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE ...

Page 88: ... PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE REMOTE CONDENSER L3 L2 L1 L2 L3 T2 T3 T1 F1 F2 61 20 60 57 58 1F 1C 4 2 1 5 FUSE 7A TRANS 56 ICE THICKNESS PROBE BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG CONTACTOR COIL 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE SWITCH 68 67 69 66 62 ICE OFF CLEAN 6...

Page 89: ...TRY DIAGRAM SHOWN DURING FREEZE CYCLE REMOTE CONDENSER TERMINATES AT PIN CONNECTION F1 F2 61 60 57 58 1F 1C 4 1 3 5 FUSE 7A TRANS 56 ICE THICKNESS PROBE TB30 BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG R R C S R OVERLOAD 48 45 46 50 49 47 74 73 TB30 CONTACTOR COIL TB35 TB30 CRANKCASE HEATER 94 95 TB30 CONTACTOR CONTACTS L2 96 COMPRESSOR RUN CAPACITOR PTCR 44 64 63 B...

Page 90: ...RESSOR CRANKCASE HEATER OVERLOAD REMOTE FAN MOTOR RUN CAPACITOR SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE REMOTE CONDENSER L1 L2 N F1 F2 F2 61 60 57 58 1F 1C 4 1 3 5 FUSE 7A TRANS 56 ICE THICKNESS PROBE BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG CONTACTOR COIL 64 63 BIN SWITCH 62 6...

Page 91: ... TB30 CONTACTOR CONTACTS L1 96 42 COMPRESSOR REMOTE FAN MOTOR RUN CAPACITOR SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE REMOTE CONDENSER L3 L2 L1 L2 L3 TB35 T2 T3 T1 TERMINATES AT PIN CONNECTION F1 F2 61 60 57 58 1F 1C 4 1 3 5 FUSE 7A TRANS 56 ICE THICKNESS PROBE TB30 BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE...

Page 92: ...EE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE REMOTE CONDENSER L3 L2 L1 L2 L3 T2 T3 T1 F1 F2 61 20 60 57 58 1F 1C 4 2 1 5 FUSE 7A TRANS 56 74 ICE THICKNESS PROBE BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG CONTACTOR COIL 64 63 BIN SWITCH 62 66 65 69 67 68 TOGGLE SWITCH 68 67 69 66 62 ICE...

Page 93: ...Section 6 Electrical System Part No 80 1100 3 6 37 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 94: ...hine shuts off The ice machine remains off until enough ice is removed from the storage bin to allow the sheet of cubes to drop clear of the water curtain As the water curtain swings back to the operating position the bin switch closes and the ice machine restarts provide the three minute delay has expired Specifications The bin switch is a magnetically operated reed switch The magnet is attached ...

Page 95: ...s Always use the water curtain magnet to cycle the switch a larger or smaller magnet will affect switch operation Watch for consistent readings when the bin switch is cycled open and closed bin switch failure could be erratic Water Curtain Removal Notes The water curtain must be on bin switch closed to start ice making While a freeze cycle is in progress the water curtain can be removed and instal...

Page 96: ...pressor to cool then check the readings again Check Motor Windings to Ground Check continuity between all three terminals and the compressor shell or copper refrigeration line Scrape metal surface to get good contact If continuity is present the compressor windings are grounded and the compressor should be replaced Determine if the Compressor is Seized Check the amp draw while the compressor is tr...

Page 97: ...frigerant discharge and suction pressures to be somewhat equalized prior to the compressor starting To assure equalization of pressures the harvest valve and HPR valve on remotes will energize for 45 seconds prior to compressor starting The harvest valve and HPR valve on remotes remains on for an additional 5 seconds while the compressor is starting 2 When starting the compressor the contactor clo...

Page 98: ...or example if the PTCR is properly cooled say 60 F 15 6 C when the compressor starts it will take 25 to 1 0 seconds before its temperature reaches 260 F 126 6 C and current flow is stopped If the PTCR is still warm say 160 F 71 1 C when the compressor starts it will take only 125 to 50 seconds before its temperature reaches 260 F 126 6 C and current flow is stopped This decreased time may be insuf...

Page 99: ...and the harvest valve and HPR solenoid coil is functional before assuming that the PTCR is bad CHECKING THE PTCR 1 Visually inspect the PTCR Check for signs of physical damage NOTE The PTCR case temperature may reach 210 F 100 C while the compressor is running This is normal Do not change a PTCR just because it is hot 2 Wait at least 10 minutes for the PTCR to cool to room temperature 3 Remove the...

Page 100: ...om the toggle switch 3 Check across the toggle switch terminals using a calibrated ohm meter Note where the wire numbers are connected to the switch terminals or refer to the wiring diagram to take proper readings 4 Replace the toggle switch if ohm readings do not match all three switch settings CONTROL BOARD RELAYS Function The control board relays energize and de energize system components Speci...

Page 101: ...ED ON WIRES MAIN FUSE 7A AUTOMATIC CLEANING SYSTEM AuCS ACCESSORY PLUG ICE THICKNESS PROBE 3 16 CONNECTION WATER LEVEL PROBE JUMPER USED ON Q1300 Q1600 Q1800 ONLY DC LOW VOLTAGE ELECTRICAL PLUG NUMBERS MARKED ON WIRES CLEAN LIGHT YELLOW WATER LEVEL PROBE LIGHT GREEN BIN SWITCH LIGHT GREEN HARVEST LIGHT SAFETY LIMIT CODE LIGHT RED 1C 1F 1G 67 62 63 68 65 ...

Page 102: ...oard along with inputs controls all electrical components including the ice machine sequence of operation Prior to diagnosing you must understand how the inputs affect the control board operation Refer to specific component specifications inputs wiring diagrams and ice machine sequence of operation sections for details As an example refer to Ice Thickness Probe on the next page for information rel...

Page 103: ...rvest cycle without delay this feature is not used on the first cycle after moving the toggle switch OFF and back to ICE MAXIMUM FREEZE TIME The control system includes a built in safety which will automatically cycle the ice machine into harvest after 60 minutes in the freeze cycle ICE THICKNESS CHECK The ice thickness probe is factory set to maintain the ice bridge thickness at 1 8 3 2 mm NOTE M...

Page 104: ... light comes on but the ice machine stays in the freeze sequence The ice thickness control circuitry is functioning properly The ice machine is in a six minute freeze time lock in Verify step 1 of this procedure was followed correctly The harvest light does not come on Proceed to Step 3 below Step 3 Jumper wire connected from control board terminal 1C to ground Monitoring of Harvest Light Correcti...

Page 105: ...ontrol board at terminal 1C Figure 6 24 Step 2 Step 2 Disconnect probe from control board terminal 1C Monitoring of Harvest Light Correction The harvest light stays off and the ice machine remains in the freeze sequence The ice thickness probe is causing the malfunction Verify that the Ice Thickness probe is adjusted correctly The harvest light comes on and 6 10 seconds later the ice machine cycle...

Page 106: ... not rely on float switches or timers to maintain consistent water level control During the freeze cycle the water inlet valve energizes turns on and de energizes turns off in conjunction with the water level probe located in the water trough During the first 45 seconds of the Freeze Cycle The water inlet valve is on when there is no water in contact with the water level probe The water inlet valv...

Page 107: ... inlet valve safety shut off mode You must complete the entire diagnostic procedure within 6 minutes of starting Important For the test to work properly you must wait until the freeze cycle starts prior to connecting the jumper wire If you restart the test you must disconnect the jumper wire restart the ice machine step 1 and then reinstall the jumper wire after the compressor starts Step 2 Jumper...

Page 108: ...st by disconnecting the jumper wire restarting the ice machine step 1 and then reinstalling the jumper wire to terminal 1F after the compressor starts Figure 6 27 Step 3 Step 3 Jumper wire connected from control board terminal 1F to ground Is water flowing into the water trough The Water Level Light is The Water Inlet Valve Solenoid Coil is Cause no on De Energized The water level probe is causing...

Page 109: ...rough The Water Level Light is The Water Inlet Valve Solenoid Coil is Cause yes off Energized This is Normal Operation don t change any parts no on or off Energized Or De Energized Proceed to step 3 Important For the test to work properly you must wait until the freeze cycle starts prior to disconnecting the water level probe If you restart the test you must reconnect the water level probe restart...

Page 110: ...2 Verify the high pressure cutout is closed The H P C O is closed if primary power voltage is present at terminals 55 and 56 on the control board 3 Verify control board fuse is OK If the bin switch light functions the fuse is OK 4 Verify the bin switch functions properly A defective bin switch can falsely indicate a full bin of ice 5 Verify ICE OFF CLEAN toggle switch functions properly A defectiv...

Page 111: ...UTOUT BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE LIGHT LOW D C VOLTAGE PLUG TB35 TB30 CONTACTOR CONTACTS L1 42 COMPRESSOR RUN CAPACITOR FAN CYCLE CONTROL FAN MOTOR AIR COOLED ONLY RUN CAPACITOR L2 N SEE SERIAL PLATE FOR VOLTAGE CAUTION DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY DIAGRAM SHOWN DURING FREEZE CYCLE TERMINATES AT PIN CONNECTION PTCR TB30 64 63 BIN SWITCH 62 66 65 69 ...

Page 112: ...Electrical System Section 6 6 56 Part No 80 1100 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 113: ...igerant absorbs heat picked up during the harvest cycle from the evaporator The suction pressure decreases during the prechill Freeze Cycle Refrigeration Sequence The refrigerant absorbs heat from water running over the evaporator surface The suction pressure gradually drops as ice forms HEAT EXCHANGER EVAPORATOR CONDENSER COMPRESSOR EXPANSION VALVE HARVEST SOLENOID VALVE AIR OR WATER DRIER STRAIN...

Page 114: ...t valve is sized to allow the proper amount of refrigerant into the evaporator This specific sizing along with the proper system refrigerant charge assures proper heat transfer without the refrigerant condensing and slugging the compressor HEAT EXCHANGER EVAPORATOR CONDENSER COMPRESSOR EXPANSION VALVE HARVEST SOLENOID VALVE AIR OR WATER DRIER STRAINER RECEIVER WATER COOLED ONLY LOW PRESSURE VAPOR ...

Page 115: ...bs heat from the water running over the evaporator surface The suction pressure gradually drops as ice forms The headmaster control valve maintains discharge pressure in ambient temperatures below 70 F 21 1 C See Headmaster Control Valve on Page 7 30 X X HEAT EXCHANGER EVAPORATOR SOLENOID LINE LIQUID CHECK VALVE SERVICE RECEIVER CONDENSER REMOTE COMPRESSOR RECEIVER EXPANSION VALVE HARVEST SOLENOID...

Page 116: ... assures proper heat transfer without the hot gas condensing to liquid and slugging the compressor The harvest pressure regulating H P R valve helps maintain the suction pressure during the harvest cycle See H P R System on Page 7 27 HEAT EXCHANGER EVAPORATOR SOLENOID LINE LIQUID CHECK VALVE SERVICE RECEIVER CONDENSER REMOTE COMPRESSOR RECEIVER EXPANSION VALVE HARVEST SOLENOID VALVE VALVE HARVEST ...

Page 117: ...nd the liquid line solenoid prevents refrigerant from migrating back into the low side This protects the compressor from refrigerant migration during the off cycle preventing refrigerant slugging upon start up X X X HEAT EXCHANGER EVAPORATOR SOLENOID LINE LIQUID CHECK VALVE SERVICE RECEIVER CONDENSER REMOTE COMPRESSOR RECEIVER EXPANSION VALVE HARVEST SOLENOID VALVE VALVE HARVEST PRESSURE REGULATIN...

Page 118: ...OTE The refrigeration sequence for self contained dual expansion valve ice machines is identical to self contained single expansion valve ice machines See Pages 7 1 and 7 2 for sequence of operation x x HARVEST SOLENOID VALVE AIR OR WATER COOLED CONDENSER COMPRESSOR HEAT EXCHANGE RECEIVER DRIER STRAINER EXPANSION VALVE EXPANSION VALVE EVAPORATOR HARVEST SOLENOID VALVE SV1512 ...

Page 119: ...nsion valve ice machines See Pages 7 3 7 4 and 7 5 for sequence of operation X X x x COMPRESSOR HEAT EXCHANGE DRIER B CHECK VALVE RECEIVER C R HEAD PRESSURE CONTROL VALVE H P R SOLENOID REGULATING VALVE HARVEST PRESSURE REMOTE CONDENSER CHECK VALVE VALVE VALVE RECEIVER SERVICE SOLENOID LINE LIQUID VALVE EXPANSION VALVE EVAPORATOR EXPANSION VALVE STRAINER HARVEST SOLENOID VALVE SOLENOID VALVE HARVE...

Page 120: ...valve Actually the problem loose bulb was corrected when the technician properly mounted the bulb of the replacement expansion valve The service technician s failure to check the expansion valve bulb for proper mounting an external check resulted in a misdiagnosis and the needless replacement of a good expansion valve 2 An ice machine that is low on charge may cause a good expansion valve to starv...

Page 121: ... C room with 70 F 21 1 C water 1 Determine the ice machine operating conditions Air temp entering condenser _______ Air temp around ice machine _______ Water temp entering sump trough _______ 2 Refer to the appropriate 24 Hour Ice Production Chart These charts begin on Page 7 33 Use the operating conditions determined in Step 1 to find published 24 hour ice production ______ 3 Perform an actual ic...

Page 122: ...n Manual Remote condenser line set is improperly installed Reinstall according to the Installation Manual Possible Problem Corrective Action Water area evaporator is dirty Clean as needed Water inlet pressure not between 20 and 80 psi Install a water regulator valve or increase the water pressure Incoming water temperature is not between 35 F 1 7 C and 90 F 32 2 C If too hot check the hot water li...

Page 123: ...eeze cycle ice formation on the outlet will be close to or just a bit thinner than ice formation on the intlet The dimples in the cubes at the outlet of the evaporator may be more pronounced than those on the intlet This is normal The ice thickness probe must be set to maintain the ice bridge thickness at approximately 1 8 If ice forms uniformly across the evaporator surface but does not reach 1 8...

Page 124: ...vaporator This is generally caused by loss of heat transfer from the tubing on the back side of the evaporator Figure 7 10 Spotty Ice Formation 5 No Ice Formation The ice machine operates for an extended period but there is no ice formation at all on the evaporator Figure 7 11 Q1300 Q1600 Q1800 Evaporator Tubing SV1575 OUTLET INLET ICE SV1577 OUTLET INLET ICE Important The Q1300 Q1600 and Q1800 mo...

Page 125: ...he control board continually flashes on and off Use the following procedures to determine which safety limit has stopped the ice machine 1 Move the toggle switch to OFF 2 Move the toggle switch back to ICE 3 Watch the harvest light It will flash one or two times corresponding to safety limits 1 and 2 to indicate which safety limit stopped the ice machine After safety limit indication the ice machi...

Page 126: ...nor problem or something external to the ice machine This may be difficult to diagnose as many external problems occur intermittently Example An ice machine stops intermittently on safety limit 1 long freeze times The problem could be a low ambient temperature at night a water pressure drop the water is turned off one night a week etc When a high pressure cut out or a safety limit stops the ice ma...

Page 127: ...r installation See Installation Visual Inspection Checklist on Page 7 10 Water system Low water pressure 20 psi min High water pressure 80 psi max High water temperature 90 F 32 2 C max Clogged water distribution tube Dirty defective water fill valve Dirty defective water dump valve Defective water pump Electrical system Ice thickness probe out of adjustment Harvest cycle not initiated electricall...

Page 128: ...cated If the harvest light did not flash prior to the ice machine restarting then the ice machine did not stop because it exceeded a safety limit Possible Cause Check Correct Improper installation See Installation Visual Inspection Checklist on Page 7 10 Water system Water area evaporator dirty Dirty defective water dump valve Vent tube not installed on water outlet drain Water freezing behind eva...

Page 129: ...dle of Cycle __________ __________ End of Cycle __________ __________ Possible Cause Check Correct Improper installation See Installation Visual Inspection Checklist on Page 7 10 Restricted condenser air flow air cooled models High inlet air temperature 110 F 43 3 C max Condenser discharge air recirculation Dirty condenser filter Dirty condenser fins Defective fan cycling control Defective fan mot...

Page 130: ...r to Cycle Time and Operating Pressure charts for ice machine model being checked Using operating conditions from Step 1 determine published freeze cycle time and published freeze cycle suction pressure Published freeze cycle time Published freeze cycle suction pressure 13 7 14 1 minutes 55 36 PSIG 2B Compare the published freeze cycle time and published freeze cycle suction pressure Develop a cha...

Page 131: ...n Manitowoc components in system H P R solenoid leaking harvest valve stuck open TXV flooding check bulb mounting Defective compressor Possible Cause Check Correct Improper installation See Installation Visual Inspection Checklist on Page 7 10 Discharge pressure Discharge pressure is too low and is affecting low side See Freeze Cycle Discharge Pressure Low Checklist on Page 7 16 Improper refrigera...

Page 132: ...lies in the difference between the two temperatures five minutes into the freeze cycle These temperatures must be within 7 of each other Use this procedure to document freeze cycle inlet and outlet temperatures 1 Use a quality temperature meter capable of taking temperature readings on curved copper lines 2 Attach the temperature meter sensing device to the copper lines entering and leaving the ev...

Page 133: ... Feel the inlet of the harvest valve s 3 Feel the compressor discharge line 4 Compare the temperature of the inlet of the harvest valves to the temperature of the compressor discharge line Important Feeling the harvest valve outlet or across the harvest valve itself will not work for this comparison The harvest valve outlet is on the suction side cool refrigerant It may be cool enough to touch eve...

Page 134: ...e discharge line temperature will be higher than 160 F 71 1 C on a normally operating ice machine Procedure Connect a temperature probe on the compressor discharge line with in 6 of the compressor and insulate Observe the discharge line temperature for the last three minutes of the freeze cycle and record the maximum discharge line temperature Discharge Line Temperature Above 160 F 71 1 C At End O...

Page 135: ...Section 7 Refrigeration System Part No 80 1100 3 7 23 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 136: ...umns have matching high numbers a procedure was not performed properly and or supporting material was not analyzed correctly Final Analysis The column with the highest number of check marks identifies the refrigeration problem COLUMN 1 HARVEST VALVE LEAKING A leaking harvest valve must be replaced COLUMN 2 LOW CHARGE TXV STARVING Normally a starving expansion valve only affects the freeze cycle pr...

Page 137: ...fore proceeding Freeze Cycle Suction Pressure _____ ______ ______ 1 minute Middle End If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist to eliminate problems and or components not listed on this table before proceeding Suction pressure is High Suction pressure is Low or Normal Suction pressure is High Suction pressure is High Wait 5 minutes int...

Page 138: ...iddle End into cycle If discharge pressure is High or Low refer to a freeze cycle high or low discharge pressure problem checklist to eliminate problems and or components not listed on this table before proceeding Freeze Cycle SUCTION pressure _____ ______ ______ Beginning Middle End If suction pressure is High or Low refer to a freeze cycle high or low suction pressure problem checklist to elimin...

Page 139: ...alve which opens when energized and closes when de energized Figure 7 12 H P R Solenoid Harvest pressure regulating valve H P R valve This is a non adjustable pressure regulating valve which modulates open and closed based on the refrigerant pressure at the outlet of the valve The valve closes completely and stops refrigerant flow when the pressure at the outlet rises above the valve setting Figur...

Page 140: ...ndensing to liquid The H P R solenoid is opened energized during the harvest cycle allowing refrigerant gas from the top of the receiver to flow into the H P R valve The H P R valve modulates open and closed raising the suction pressure high enough to sustain heat for the harvest cycle without allowing refrigerant to condense to liquid in the evaporator In general harvest cycle suction pressure ri...

Page 141: ...ures 24 Hour Ice Production Charts Connect refrigeration manifold gauge set to the access valves on the front of the ice machine and a thermometer thermocouple on the discharge line within 6 of the compressor insulate thermocouple 5 Establish baseline by recording suction and discharge pressure discharge line temperature and freeze harvest cycle times Refer to section 7 Operational Analysis for da...

Page 142: ...er Operational Pressure Chart later in this section If the air temperature is below 70 F 21 1 C the head pressure should be modulating about 225 PSIG 3 Determine the temperature of the liquid line entering the receiver by feeling it This line is normally warm body temperature 4 Using the information gathered refer to the chart below NOTE A headmaster that will not bypass will function properly wit...

Page 143: ...e changed and the ice machine must be evacuated and properly recharged 3 If the ice machine does not start to operate properly after adding charge replace the headmaster FAN CYCLE CONTROL VS HEADMASTER A fan cycle control cannot be used in place of a headmaster The fan cycle control is not capable of bypassing the condenser coil and keeping the liquid line temperature and pressure up This is very ...

Page 144: ... be below 300 psig to reset Check Procedure 1 Set ICE OFF CLEAN switch to OFF Manual reset HPCO reset if tripped 2 Connect manifold gauges 3 Hook voltmeter in parallel across the HPCO leaving wires attached 4 On water cooled models close the water service valve to the water condenser inlet On self contained air cooled and remote models disconnect the fan motor 5 Set ICE OFF CLEAN switch to ICE 6 N...

Page 145: ... 190 85 110 70 21 1 195 260 60 28 120 190 85 110 80 26 7 210 270 65 28 160 190 90 110 90 32 2 240 290 70 30 190 210 100 120 100 37 8 270 330 70 35 220 240 120 140 110 43 3 310 390 85 40 250 270 120 150 Suction pressure drops gradually throughout the freeze cycle Air Temp Around Ice Machine F C Freeze Time Harvest Time Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 11 5 13 5 12 8 15 0 14 5 1...

Page 146: ...50 60 20 150 190 70 90 80 26 7 220 280 60 26 180 220 70 90 90 32 2 250 310 66 30 190 220 80 100 100 37 8 280 350 70 32 220 250 80 110 110 43 3 310 390 85 40 250 270 80 120 Suction pressure drops gradually throughout the freeze cycle Air Temp Around Ice Machine F C Freeze Time Harvest Time Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 10 6 12 5 12 0 14 1 12 3 14 4 1 2 5 80 26 7 10 8 12 7 12...

Page 147: ...6 160 190 80 100 80 26 7 220 280 50 36 170 200 90 110 90 32 2 230 320 54 38 180 220 90 120 100 37 8 270 360 56 40 200 250 95 140 110 43 3 280 380 58 42 210 260 95 150 Suction pressure drops gradually throughout the freeze cycle Air Temp Around Ice Machine F C Freeze Time Harvest Time Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 12 6 14 4 13 6 15 5 15 4 17 6 1 2 5 80 26 7 13 1 14 9 14 2 16...

Page 148: ...150 170 85 100 80 26 7 250 290 65 38 165 185 90 110 90 32 2 260 330 70 40 175 195 100 120 100 37 8 300 380 80 41 195 220 130 150 110 43 3 310 390 80 42 200 225 135 155 Suction pressure drops gradually throughout the freeze cycle Air Temp Around Ice Machine F C Freeze Time Harvest Time Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 10 3 11 7 11 0 12 5 12 2 13 9 1 2 5 80 26 7 10 6 12 1 11 3 1...

Page 149: ...7 33 165 180 80 100 80 26 7 230 265 50 35 165 185 80 100 90 32 2 260 290 55 36 190 210 90 110 100 37 8 290 340 60 38 215 235 105 125 110 43 3 195 260 45 30 235 255 125 140 Suction pressure drops gradually throughout the freeze cycle Air Temp Around Ice Machine F C Freeze Time Harvest Time Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 9 9 11 7 11 4 13 4 12 6 14 8 1 2 5 80 26 7 10 1 11 9 11 ...

Page 150: ... Harvest Cycle Discharg e Pressure PSIG Suction Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG 20 28 9to 50 10 0 225 245 50 32 175 190 85 100 70 21 1 230 250 50 32 175 190 85 100 80 26 7 240 260 52 32 180 195 85 100 90 32 2 245 270 54 35 185 200 85 100 100 37 8 280 310 57 37 190 205 90 105 110 43 3 290 325 64 39 190 205 95 110 Suction pressure drops gradually throughout the freeze cyc...

Page 151: ...G Suction Pressure PSIG Discharg e Pressure PSIG Suction Pressure PSIG 50 10 0 225 235 46 25 140 184 80 102 70 21 1 225 235 46 26 148 184 82 104 80 26 7 225 235 48 26 154 186 86 108 90 32 2 225 240 48 26 154 190 86 108 100 37 8 225 245 50 28 162 194 86 112 110 43 3 225 250 52 28 165 200 86 115 Suction pressure drops gradually throughout the freeze cycle Air Temp Entering Condenser F C Freeze Time ...

Page 152: ...80 32 18 140 180 70 90 80 26 7 225 280 36 20 140 180 70 95 90 32 2 260 295 38 22 150 200 80 100 100 37 8 300 330 40 24 210 225 80 100 110 43 3 320 360 44 26 210 240 85 120 Suction pressure drops gradually throughout the freeze cycle Air Temp Around Ice Machine F C Freeze Time Harvest Time Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 8 7 10 1 9 5 11 0 10 9 12 5 1 2 5 80 26 7 8 9 10 2 9 7 1...

Page 153: ...vest Cycle Discharg e Pressure PSIG Suction Pressure PSIG Discharg e Pressure PSIG Suction Pressure PSIG 20 28 9to 50 10 0 220 250 30 22 180 200 65 90 70 21 1 225 250 32 22 190 200 70 90 80 26 7 240 260 33 22 190 205 70 90 90 32 2 255 265 34 22 195 205 70 90 100 37 8 275 295 38 24 200 210 70 90 110 43 3 280 320 40 26 200 225 75 100 Suction pressure drops gradually throughout the freeze cycle Air T...

Page 154: ...sure PSIG Suction Pressure PSIG Discharg e Pressure PSIG Suction Pressure PSIG 50 10 0 225 235 36 18 160 185 65 85 70 21 1 225 235 38 18 165 185 70 85 80 26 7 225 235 40 18 165 185 70 85 90 32 2 225 235 40 20 165 185 70 85 100 37 8 225 235 40 20 165 185 70 85 110 43 3 225 240 42 20 170 190 75 90 Suction pressure drops gradually throughout the freeze cycle Air Temp Entering Condenser F C Freeze Tim...

Page 155: ...80 40 20 145 170 70 80 80 26 7 220 280 42 22 150 185 70 80 90 32 2 245 300 48 26 160 190 70 85 100 37 8 275 330 50 26 160 210 70 90 110 43 3 280 360 52 28 165 225 75 100 Suction pressure drops gradually throughout the freeze cycle Air Temp Around Ice Machine F C Freeze Time Harvest Time Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 9 0 10 1 9 8 10 9 11 4 12 6 1 2 5 80 26 7 9 1 10 1 9 8 11 ...

Page 156: ...28 9to 50 10 0 220 250 40 22 135 170 75 95 70 21 1 240 260 40 22 140 180 80 95 80 26 7 240 270 41 22 140 190 80 95 90 32 2 250 290 42 22 140 200 80 95 100 37 8 280 320 46 22 140 210 80 95 110 43 3 310 360 48 24 140 220 85 100 Suction pressure drops gradually throughout the freeze cycle Air Temp Entering Condenser F C Freeze Time Harvest Time Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 7 ...

Page 157: ...n Pressure PSIG Discharge Pressure PSIG Suction Pressure PSIG 20 to 50 29 to 10 0 220 255 52 26 100 120 70 85 70 21 1 250 270 56 28 110 120 75 90 80 26 7 250 275 56 28 110 120 75 90 90 32 2 255 285 56 28 110 120 80 90 100 37 8 270 310 56 30 115 130 80 95 110 43 3 305 350 58 32 120 135 80 100 Suction pressure drops gradually throughout the freeze cycle Air Temp Entering Condenser F C Freeze Time Ha...

Page 158: ... PSIG Suction Pressure PSIG Discharg e Pressure PSIG Suction Pressure PSIG 50 10 0 235 245 36 20 170 190 65 80 70 21 1 235 245 38 20 170 190 65 80 80 26 7 235 245 40 20 170 190 65 80 90 32 2 235 250 42 22 175 190 65 80 100 37 8 235 255 44 22 175 190 65 80 110 43 3 235 260 46 22 175 190 65 80 Suction pressure drops gradually throughout the freeze cycle Air Temp Entering Condenser F C Freeze Time Ha...

Page 159: ... low side on manifold gauges 4 Perform recovery or evacuation A Recovery Operate the recovery unit as directed by the manufacturer s instructions B Evacuation prior to recharging Pull the system down to 250 microns Then allow the pump to run for an additional half hour Turn off the pump and perform a standing vacuum leak check NOTE Check for leaks using a halide or electronic leak detector after c...

Page 160: ...hat no refrigerant contamination or loss occurs 8 Make sure that all of the vapor in the charging hoses is drawn into the ice machine before disconnecting the charging hoses A Run the ice machine in freeze cycle B Close the high side service valve at the ice machine C Open the low side service valve at the ice machine D Open the high and low side valves on the manifold gauge set Any refrigerant in...

Page 161: ...ing the manifold gauge hose REMOTE RECOVERY EVACUATION 1 Place the toggle switch in the OFF position 2 Install manifold gauges charging cylinder scale and recovery unit or two stage vacuum pump 3 Open backseat the high and low side ice machine service valves 4 Open the receiver service valve halfway 5 Open high and low side on the manifold gauge set 6 Perform recovery or evacuation A Recovery Oper...

Page 162: ... O PEN REC O VER Y UNIT VAC UU M PUM P SERVICE VALVE 1 2 O PEN RECEI VER M ANIFO LD SET O PEN DRIER SO LEN O ID LINE VALVE REG ULATING PRESSURE HAR VEST LI QU ID B AC K SEATED SERVICE VALVE CHEC K VALVE TEE O PEN C B R HIGH SIDE B AC K SEATED SERVICE VALVE LO W SIDE CO M PRESSO R HAR VEST PRESSURE SO LEN O ID VALVE VALVE EXPANSIO N VALVE CHEC K STRAINER VALVES SO LEN O ID H O T GAS HEAT E XCHANGER...

Page 163: ...achine is fully charged 5 Ensure all vapor in charging hoses is drawn into the machine then disconnect the manifold gauges NOTE Backseat the receiver outlet service valve after charging is complete and before operating the ice machine If the access valve core removal and installation tool is used on the discharge quick connect fitting reinstall the Schraeder valve core before disconnecting the acc...

Page 164: ...ERVICE VALVE 1 2O PEN RECEI VER M ANIFO LD SET O PEN DRIER SO LEN O ID LINE VALVE REG ULATING PRESSURE HAR VEST LI QU ID B AC K SEATED SERVICE VALVE CHEC K VALVE TEE O PEN C B R HIGH SIDE B AC K SEATED SERVICE VALVE LO W SIDE CO M PRESSO R HAR VEST PRESSURE SO LEN O ID VALVE VALVE EXPANSIO N VALVE CHEC K STRAINER VALVES SO LEN O ID H O T GAS HEAT E XCHANGER EVAPO RAT O R SV1462 Figure 7 17 Remote ...

Page 165: ...en suction and discharge lines at the compressor for burnout deposits 5 If no signs of contamination are present perform an acid oil test Check the chart below to determine the type of cleanup required Important Manitowoc Ice Inc assumes no responsibility for the use of contaminated refrigerant Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing co...

Page 166: ...est to make a preliminary leak check You should use an electronic leak detector after system charging to be sure there is no leak 5 Charge the system with the proper refrigerant to the nameplate charge 6 Operate the ice machine Severe System Contamination Cleanup Procedure 1 Remove the refrigerant charge 2 Remove the compressor 3 Disassemble the harvest solenoid valve If burnout deposits are found...

Page 167: ...ormal evacuation procedures REPLACING PRESSURE CONTROLS WITHOUT REMOVING REFRIGERANT CHARGE This procedure reduces repair time and cost Use it when any of the following components require replacement and the refrigeration system is operational and leak free Fan cycle control air cooled only Water regulating valve water cooled only High pressure cut out control High side service valve Low side serv...

Page 168: ...Refrigeration System Section 7 7 56 Part No 80 1100 3 Figure 7 18 Using Pinch Off Tool SV1406 ...

Page 169: ...0 Q800 Q1000 UK 032S 1 4 89 3025 3 Remote Air Cooled Q450 Q600 Q800 Q1000 UK 083S 3 8 89 3027 3 All Condenser Type Q1300 Q1600 Q1800 UK 083S 3 8 89 3027 3 Suction Filter UK 165S 5 8 89 3028 3 Suction Filter used when cleaning up severely contaminated systems Important Driers are covered as a warranty part The drier must be replaced any time the system is opened for repairs Important This informati...

Page 170: ... Reclaim To reprocess refrigerant to new product specifications see below by means which may include distillation A chemical analysis of the refrigerant is required after processing to be sure that product specifications are met This term usually implies the use of processes and procedures available only at a reprocessing or manufacturing facility Chemical analysis is the key requirement in this d...

Page 171: ...Re use of recovered or recycled refrigerant from other products is not approved Recycling equipment must be certified to ARI Standard 740 latest edition and be maintained to consistently meet this standard Recovered refrigerant must come from a contaminant free system To decide whether the system is contaminant free consider Type s of previous failure s Whether the system was cleaned evacuated and...

Page 172: ...ge to replace a faulty component be sure you have all of the needed components at the site Remove new system component plugs and caps just prior to brazing Be prepared to connect a vacuum pump immediately after brazing 4 Are there any special procedures required if a POE system is diagnosed with a refrigerant leak For systems found with positive refrigerant system pressure no special procedures ar...

Page 173: ...ipment to HFC usage Once designated and calibrated if needed for HFC use this equipment should be used specifically with HFC refrigerants only 8 Do I have to recover HFC refrigerants Yes Like other refrigerants government regulations require recovering HFC refrigerants 9 Will R 404A or R 134A separate if there is a leak in the system No Like R 502 the degree of separation is too small to detect 10...

Page 174: ...Refrigeration System Section 7 7 62 Part No 80 1100 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 175: ...Section 7 Refrigeration System Part No 80 1100 3 7 63 THIS PAGE INTENTIONALLY LEFT BLANK ...

Search results

Summary of Contents for QD0202A

Reviews:

Related manuals for QD0202A

Brands by name

Popular brands

Manitowoc QD0202A, Service Manual

Search results

Summary of Contents for QD0202A

Reviews:

Related manuals for QD0202A

Brands by name

Popular brands