KM-250B F Service Manual - HOSHIZAKI
73094NO.:ISSUED:July 24, 2000REVISED: December 22, 2004HOSHIZAKICRESCENT CUBERMODELKM-250BAFKM-250BWFSERVICE MANUAL1
IMPORTANTOnly qualified service technicians should attempt to service or maintain thisicemaker. No such service or maintenance should be undertaken until thetechnician has thoroughly read this Service Manual.HOSHIZAKI provides this manual primarily to assist qualified service technicians in theservice and maintenance of the icemaker.Should the reader have any questions or concerns which have not been satisfactorilyaddressed, please call or write to the HOSHIZAKI Technical Support Department forassistance.HOSHIZAKI AMERICA, INC.618 Highway 74 SouthPeachtree City, GA 30269Attn: HOSHIZAKI Technical Support DepartmentPhone: 1-800-233-1940 Technical Service(770) 487-2331Fax:(770) 487-3360NOTE: To expedite assistance, all correspondence/communication MUST include the followinginformation: Model Number Serial Number Complete and detailed explanation of the problem2
Please review this manual. It should be read carefully before the icemaker is serviced ormaintenance operations performed. Only qualified service technicians should service andmaintain the icemaker. This manual should be made available to the technician prior toservice or maintenance.CONTENTSI. Specifications . 51. KM-250BAF . 52. KM-250BWF . 6II. General Information . 71. Construction . 7[a] KM-250BAF . 7[b] KM-250BWF . 82. Controller Board . 9[a] Solid-State Control . 9[b] Controller Board . 9[c] Sequence . 13[d] Controls and Adjustments . 15[e] Checking the Controller Board . 18III. Technical Information . 201. Water Circuit and Refrigerant Circuit. 20[a] KM-250BAF . 20[b] KM-250BWF . 212. Wiring Diagram . 22KM-250BAF, KM-250BWF . 223. Timing Chart . 234. Performance Data . 25[a] KM-250BAF . 25[b] KM-250BWF . 26IV. Service Diagnosis . 271. No Ice Production . 272. Evaporator is Frozen Up . 303. Low Ice Production . 314. Abnormal Ice . 315. Other . 31V. Removal and Replacement of Components . 321. Service for Refrigerant Lines . 32[a] Refrigerant Recovery . 32[b] Evacuation and Recharge [R-404A] . 322. Brazing . 333. Removal and Replacement of Compressor . 344. Removal and Replacement of Drier . 355. Removal and Replacement of Expansion Valve . 366. Removal and Replacement of Hot Gas Valve . 377. Removal and Replacement of Evaporator . 388. Removal and Replacement of Water Regulating Valve - Water-Cooled Model Only . 399. Adjustment of Water Regulating Valve - Water-Cooled Model Only . 4010. Removal and Replacement of Thermistor . 413
11. Removal and Replacement of Fan Motor - Except Water-Cooled Model . 4212. Removal and Replacement of Water Valve . 4213. Removal and Replacement of Pump Motor . 4314. Removal and Replacement of Float Switch. 4415. Removal and Replacement of Spray Tubes. 44VI. Cleaning and Maintenance . 451. Preparing the Icemaker for Long Storage . 452. Cleaning and Sanitizing Instructions . 47[a] Cleaning Solution . 47[b] Cleaning Procedure . 47[c] Sanitizing Solution . 49[d] Sanitizing Procedure . 493. Maintenance . 514
I. Specifications1. KM-250BAF5
2. KM-250BWF6
II. General Information1. Construction[a] KM-250BAF7
[b] KM-250BWF8
2. Controller Board[a] Solid-State Control1) A HOSHIZAKI exclusive solid-state control is employed in KM-250BAF andKM-250BWF Crescent Cubers.2) A printed circuit board (hereafter called “controller board”) includes a stable and highquality control system.3) All models are pretested and factory-adjusted.[b] Controller BoardCAUTION1. Fragile, handle very carefully.2. A controller board contains integrated circuits, which are susceptible tofailure due to static discharge. It is especially important to touch the metalpart of the unit when handling or replacing the board.3. Do not touch the electronic devices on the board or the back of the boardto prevent damage to the board.4. Do not change wiring and connections. Especially, never misconnect K3,K4 and K5, because the same connector is used for the thermistor andfloat switch. K4 is not connected.5. Do not fix the electronic devices or parts on the board in the field. Alwaysreplace the whole board assembly when it goes bad.6. Do not short out power supply to test for voltage.PART NUMBER2A1410-01TYPEHOS-001A (Control Products)Features of Control Products “E” Controller Board1) Maximum Water Supply Period - 6 minutesWater solenoid valve opening, in the defrost (harvest) cycle, is limited by the defrosttimer. The water valve cannot remain open longer than the maximum period. The watervalve can close in less than six minutes if the defrost cycle is completed.9
2) Defrost TimerThe defrost cycle starts when the float switch opens and completes the freeze cycle. Butthe defrost timer does not start counting until the thermistor senses 48 F at theevaporator outlet. The period from the end of the freeze cycle up to the point of thethermistor's sensing varies depending on the ambient and water temperatures.3) High Temperature Safety - 127 7 FThe temperature of the suction line in the refrigerant circuit is limited by the hightemperature safety.During the defrost cycle the evaporator temperature rises. The thermistor senses 48 Fand starts the defrost timer. After the defrost timer counts down to zero, the normalfreeze cycle begins. If the evaporator temperature continues to rise, the thermistor willsense the rise in temperature and at 127 7 F the thermistor operates the hightemperature safety.This high temperature safety shuts down the circuit and the icemaker automatically stops.To reset the safety, turn the power off and back on again.This high temperature safety protects the unit from excessive temperature. The controlboard will beep every 3 seconds. The white reset button on the control board must bepressed with power on to reset the safety.4) Low Water SafetyIf the pump motor is operated without water, the mechanical seal can fail. To prevent thistype of failure, the controller board checks the position of the float switch at the end of theinitial one minute water fill cycle and at the end of each defrost cycle.If the float switch is in the up position (electrical circuit closed), the controller boardchanges to the ice making cycle. If the float switch is in the down position (electrical circuitopen), the controller board changes to a one minute water fill cycle before starting the icemaking cycle. This method allows for a low water safety shut down to protect the waterpump from mechanical seal failure.For water-cooled model, if the water is shut off, the unit is protected by the high pressureswitch.5) High Voltage CutoutThe maximum allowable supply voltage of this icemaker is limited by the high voltage cutout.If miswiring (especially on single phase 3 wire models) causes excessive voltage on thecontroller board, the high voltage cutout shuts down the circuit in 3 seconds and the icemakerautomatically stops. When the proper supply voltage is resumed, the icemaker automaticallystarts running again. The control board will signal this problem using 7 beeps every 3seconds.6) LED Lights and Audible Alarm SafetiesThe red LED indicates proper control voltage and will remain on unless a control voltageproblem occurs. At startup a 5 second delay occurs while the board conducts an internaltimer check. A short beep occurs when the power switch is turned ON or OFF.10
The green LED’s 1-4 represent the corresponding relays and energize and sequence 5seconds from initial start-up as follows:Sequence Step1 Minute Fill CycleHarvest CycleFreeze CycleReverse Pump OutLED’s on Length:LED4LED1, 4, & 2LED1LED1, 3, & 2Min.Max.2 min.5 min.10 sec.20 min.60 min.20 sec.Avg.60 sec.3-5 min.30-35 min.Factory set.{LED 1 – Comp; LED 2 - HGV/CFM; LED 3 – PM; LED 4 - WV}The built in safeties shut down the unit and have alarms as follows:1 beep every 3 sec. High Evaporator Temperature 127 F.Check for defrost problem (stuck HGV or relay), hot water entering unit, stuck headmaster,or shorted thermistor.2 beeps every 3 sec. Defrost Back Up Timer. Defrost 20 minutes.Orange LED marked 20 MIN energizes.Check for open thermistor, HGV not opening, TXV leaking by, low charge, or inefficientcompressor.3 beeps every 3 sec. Freeze Back Up Timer. Freeze 60 minutes.Yellow LED marked 60 MIN energizes.Check for F/S stuck closed (up), WV leaking by, HGV leaking by, TXV not feedingproperly, low charge, or inefficient compressor.To manually reset the above safeties, depress white alarm reset button with the powersupply ON.6 beeps every 3 sec. Low Voltage. Voltage is 92 Vac or less.7 beeps every 3 sec. High Voltage. Control voltage 147 Vac 5%.The red LED will de-energize if voltage protection operates.The voltage safety automatically resets when voltage is corrected.The Output Test switch “S3” provides a relay sequence test. With power OFF, place S3ON and switch power to ICE. The correct lighting sequence should be none, 2, 3, 4, 1, & 4,normal sequence every 5 seconds. S3 should remain in the “OFF” position for normaloperation.The application switch located between relay X3 & X4 must be set to match the originalboard application. Place this switch in the ALP position if there is no white wire supplied11
to the K1 connector. If there is a white wire, place the switch in the C position. If thisswitch is placed in the wrong position, either the compressor contactor will remainenergized with the control switch OFF, or the unit will not start.The dip switches should be adjusted per the adjustment chart published in the TechSpecs book. 7 & 8 must remain in the OFF position.(Control Products HOS-001A Board)12
[c] Sequence1st Cycle3. Thermistor reads 48 F.Defrost timer starts counting.1. Unit energized and control switch to “ICE”position. Water supply cycle starts.2. After 1 minute,defrost cycle starts.IMPORTANTWater valveopening is limitedto 6 minutes.&4. Defrost timer stops counting.Defrost cycle is completed and freeze cyclestarts.5. After the first 5 minutes in freeze cycle.Ready to complete freeze cycle when floatswitch circuit opens.IMPORTANT1. Board never accepts defrost completionsignal within the first 2 minutes in defrostcycle.IMPORTANTBoard never accepts freeze completion signalwithin the first 5 minutes in freeze cycle.2. Defrost cycle time is limited to 20 minuteseven if defrost timer does not stop counting.13
2nd Cycle and after with pump drainIMPORTANTFreeze cycle time is limited to 60 minutes evenif float switch does not open.2. Drain timer stops counting.Pump drain is completed1. Float switch opens and signals to completefreeze cycle.Drain timer starts counting.3. Thermistor reads 48 F.Defrost timer startscounting.IMPORTANTWater valveopening is limited to 6minutes.5. After the first 5 minutes in freeze cycle.Ready to complete freeze cycle when floatswitch circuit opens.IMPORTANTBoard never accepts freeze completion signalwithin the first 5 minutes in freeze cycle.4. Defrost timer stops counting.Defrost cycle is completed and freeze cyclestarts.IMPORTANT1. Board never accepts defrost completionsignal within the first 2 minutes in defrostcycle.2. Defrost cycle time is limited to 20 minuteseven if defrost timer does not stop counting.14
[d] Controls and AdjustmentsThe dip switch is factory-adjusted to the following positions:DIP SWITCH NO.KM-250BAF, BWF123OFF OFF OFF4OFF5ON6ON7OFF8OFF9OFF10OFFSwitch Nos. 1 and 2:Used for adjustment of the defrost timer.The defrost timer starts counting when the thermistor reads a certain temperature atthe evaporator outlet.Switch Nos. 3 and 4:Used for adjustment of the drain timer.When a freeze cycle is completed, the pump motor stops, and the icemakerresumes operation in 2 seconds. Then the pump motor drains the water tank forthe time determined by the drain timer. The drain timer also determines the timeto restrain completion of a defrost cycle, i.e. the minimum defrost time.Switch Nos. 5 and 6:Used for adjustment of the drain counter.The pump motor drains the water tank at the frequency determined by the draincounter.Switch Nos. 7 and 8:Used only for checking the controller board. Usually set in OFF position.Switch Nos. 9 and 10:Used for adjustment of freeze timer.The freeze timer determines maximumfreeze cycle time. Upon termination offreeze timer, machine initiates theharvest cycle. After 2 consecutive timerterminations, machine will shut down,possibly indicating a problem.15
1) Defrost ControlA thermistor (semiconductor) is used for a defrost control sensor. The resistance variesdepending on the suction line temperatures. The thermistor detects the temperature ofthe evaporator outlet to start the defrost timer. No adjustment is required. If necessary,check for resistance between thermistor leads, and visually check the thermistormounting, located on the suction line next to the evaporator outlet.Temperature ( F)01032507090Resistance (kΩ)14.40110.6136.0003.8712.4741.633Check a thermistor for resistance by using the following procedures.(i) Disconnect the connector K3 on the board.(ii) Remove the Thermistor. See “V. 10. Removal and Replacement of Thermistor.”(iii) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3minutes.(iv) Check for a resistance between thermistor leads.Normal reading is within 3.5 to 7 kΩ. Replace the thermistor if it exceeds the normalreading.2) Defrost TimerNo adjustment is required under normal use, as the defrost timer is adjusted to thesuitable position. However, if necessary when all the ice formed on the evaporator doesnot fall into the bin in the harvest cycle, adjust the defrost timer to a longer setting byadjusting the dip switch (No. 1 & 2) on the controller board.SETTINGDip SwitchDip SwitchNo. 1No. 2OFFONOFFONTIMEOFFOFFONON60 seconds90 seconds120 seconds180 seconds16
3) Drain TimerThe drain timer is factory-adjusted, and no adjustment is required.SETTINGDip SwitchDip SwitchNo. 3No. 4OFFONOFFONTIMET1OFFOFFONONT210 seconds10 seconds10 seconds20 seconds150180120180secondssecondssecondssecondsT1: Time to drain the water tankT2: Time to restrain defrost completion4) Drain CounterCAUTIONDo not adjust the drain counter, or the evaporator may freeze up.The drain counter is factory-adjusted to drain the water tank every 10 cycles, and noadjustment is required. However, where water quality is bad and the icemaker needs apump drain more often, the drain counter can be adjusted as shown in the table below:SETTINGDip SwitchDip SwitchNo. 5No. 6OFFONOFFONFREQUENCYOFFOFFONONevery cycleevery 2 cyclesevery 5 cyclesevery 10 cycles17
5) Freeze TimerCAUTIONAdjust to proper specification, or the unit may not operate correctly.Two new dip switches numbered 9 and 10 have been added to the improved “E” board tobetter prevent possible freeze ups. These settings come factory set to the default settingof 60 min. (OFF, OFF). Check the adjustment chart published in the Tech Specs forproper settings. If the old board does not have these two dip switches, (only 8 instead of10), leave setting as OFF, OFF.SETTINGDip SwitchDip SwitchNo. 9No. 10OFFONOFFONTIMEOFFOFFONON60 min.70 min.50 min.60 min.6) Bin ControlCAUTIONWhen the ambient temperature is below 45 F, the bin control thermostatoperates to stop the icemaker even if the ice storage bin is empty. When thethermostat is set in the prohibited range, the icemaker operates continuouslyeven if the ice storage bin is filled with ice. Setting in the prohibited rangemight cause severe damage to the icemaker resulting in failure.No adjustment is required under normal use, as the bin control is factory-adjusted. Adjust it, if necessary, so that the icemaker stops automatically within 10 seconds after icecontacts the bin control thermostat bulb.[e] Checking the Controller Board1) Visually check the sequence with the icemaker operating.2) Visually check the controller board by using the following procedures.(i) Adjust the defrost timer to minimum position.Disconnect the thermistor from the controller board.Connect a 1.5 kΩ - 3.5 kΩ resistor to the connector K3 (pins #1 and #2), and energizethe unit.18
After the 1 minute 5 second water supply cycle and the 2 minute 10 second defrostcycle, the unit should start the freeze cycle.(ii) After the above step (i), disconnect the float switch leads from the controller board withinthe first 5 minutes of the freeze cycle.The unit should go into the defrost cycle after the first 5 minutes 20 seconds of thefreeze cycle.(iii) Reconnect the float switch connector to the controller board. After the first 5 minutesof the freeze cycle, disconnect the float switch leads from the controller board.At this point, the unit should start the defrost cycle.(iv) After step (iii), de-energize the unit and confirm that the defrost timer is in theminimum position. Disconnect the resistor from the controller board, and energizethe unit.After the 1 minute water supply cycle, the defrost cycle starts.Reconnect a 1.5 kΩ - 3.5 kΩ resistor to the connector K3 (pins #1 and #2) after thefirst 2 minutes of the defrost cycle.The unit should start the freeze cycle after 1 minute 5 seconds from the resistorconnection.3) Check the controller board by using test program of the controller board.(i)Disconnect the connector K1 from the controller board. Set the dip switch No. 7 and 8on the controller board to the “ON” position, and energize the unit.(ii)The current flows to each relay (from X1 to X4) one after another every time the floatis raised and the contacts close. See the following chart, and check “OPEN” and“CLOSE” of pins of the connector K1 at each step.(iii) If the checks are completed, turn off the icemaker, plug the connector K1 into thecontroller board as before, and set the dip switch No. 7 & 8 to the “OFF” position.19
III. Technical Information1. Water Circuit and Refrigerant Circuit[a] KM-250BAF20
[b] KM-250BWF21
2. Wiring DiagramKM-250BAF, KM-250BWFNote: Pressure Switch - HIKM-250BAFCut-outCut-in 21.3467 0PSIG284.5 21.3 PSIGKM-250BWF 21.3427 0PSIG256 21.3 PSIG22
3. Timing Chart*1The pump motor for KM-250B series does not have drain cycle.*2The icemaker does not complete a defrost cycle in the first 2 or 3 minutes. See “II. 2. [d] Controls andAdjustments.”23
*1The pump motor for KM-250B series does not have drain cycle.*2The icemaker does not complete a defrost cycle in the first 2 or 3 minutes. See “II. 2. [d] Controls andAdjustments.”24
4. Performance Data[a] KM-250BAF25
[b] KM-250BWF26
IV. Service Diagnosis1. No Ice ProductionPROBLEM[1] The icemakerwill not startPOSSIBLE CAUSEa) Power Supply1. “OFF” position.2. Loose connections.3. Bad contacts.4. Voltage too high.b) Fuse (Inside FusedDisconnect, if any)c) Control Switchd) Bin ControlThermostate) High PressureControlf) Transformerg) Wiring toController Boardh) Thermistori) Hot Gas SolenoidValvej) Water Supply Linek) Water Solenoid1. Blown out.1. “OFF” position.2. Bad contacts.1. Tripped with bin filledwith ice.2. Ambient temperaturetoo cool.3. Set too warm.4. Bulb out of position.5. Bad contacts or leaks inbulb.1. Bad contacts.1. Thermal fuse blown out1.or coil winding opened.1. Loose connections oropen.1. Leads short-circuit oropen and hightemperature safetyoperates. If open, unit willstart but have long harvest.1. Continues to open infreeze cycle and hightemperature safetyoperates.1. Water supply off andwater supply cycle doesnot finish.2. Condenser waterpressure too low or offand pressure controlopens and closes frequently to finally operatehigh temperature safety.1. Mesh filter or orifice getsclogged and water supplycycle does not finish.2. Coil winding opened.3. Wiring to water valve.27REMEDY1. Move to “ON” position2. Tighten3. Check for continuity andreplace.4. Check and getrecommended voltage.1. Check for short circuitand replace1. Move to “ICE” position.2. Check for continuity andreplace.1. Remove ice.2. Increase ambienttemperature.3. See “II.2.[d]Controls andAdjustments, 6) BinControl.”4. Place in position.5. Check for continuity andreplace.1. Check for continuity andreplace.Replace.1. Check for continuity andreplace.1. See “II.2.[d] Controlsand Adjustments, 1)Defrost Control.”1. Check for power off infreeze cycle and replace.1. Check and getrecommendedpressure.2. Check and getrecommendedpressure.1. Clean.2. Replace.3. Check for looseconnection or open, andreplace.
PROBLEM[2] Watercontinues tobe supplied,and the icemaker will notstart.[3] Compressorwill not startor operatesintermittentlyPOSSIBLE CAUSEl) Controller Board1. Defectivea) Float Switch1. Connector disconnected.2. Leads opened or defectiveswitch.3. Float does not move freely.1. Defective.b) Controller Boarda) Wash Switchb) High PressureControlc) Overload Protectore) Start Capacitorf) Magnetic Contactor2. Voltage too low.3. Refrigerant overcharged orundercharged.1. Bad contacts.2. Coil winding opened.1. Defective.1. Bad contacts.g) Compressor2. Coil winding opened.1. Wiring to compressor.h) Controller board2. Defective.3. Protector tripped.1. Defective.d) Starter[4] Watercontinues tobe supplied infreeze cycle.1. “WASH” position.2. Bad contacts.1. Dirty air filter orcondenser.2. Ambient or condenserwater temp. too warm.3. Refrigerant overcharged.4. Condenser water pressuretoo low or off. [Watercooled model only].5. Fan not operating. [Exceptwater-cooled model].6. Refrigerant line orcomponents plugged.1. Bad contacts.a) Water SolenoidValveb) Controller Board1. Diaphragm does not close.1. Defective.28REMEDY1. See “II.2[e] Checking theController Board.”1. Place in position.2. Check and replace.3. Clean or replace.1. Replace.1. Move to “ICE” position.2. Check and replace.1. Clean.2. Reduce ambient temp.3. Recharge.4. Check and getrecommended pressure.5. See chart 1 - [6].6. Clean and replace drier.1. Check for continuity andreplace.2. Increase voltage.3. Recharge.1. Check and replace.2. Replace.1. Replace.1. Check for continuity andreplace.2. Replace.1. Check for looseconnection or open, andreplace.2. Replace.3. Reduce temperature.1. See “II.2.[ e ] Checking theController Board.”1. Check for water leakswith icemaker off.1. See “II.2.[ e ] Checking theController Board.”
PROBLEMPOSSIBLE CAUSE[5] No watera) Water Supply Linecomes fromspray tubes.water pumpb) Water Solenoidwill not start, orValvefreeze cycletime is tooc) Water Systemshort.d) Pump Motore) Controller Board[6] Fan motor will a) Fan Motornot start, or isnot operating.b) Controller Board[7] All components a) Refrigerantrun but no iceis produced.b) Compressorc) Hot Gas SolenoidValved) Water SolenoidValve1. Water pressure too low andwater level in water tanktoo low.1. Dirty mesh filter or orificeand water level in watertank too low.1. Water leaks.REMEDY1. Check and getrecommended pressure.1. Clean.1. Check connections forwater leaks, and replace.2. Clogged.2. Clean.1. Motor winding opened.1. Replace.2. Bearing worn out.2. Replace.3. Wiring to pump motor3. Check for looseconnection or open, andreplace.4. Defective capacitor.4. Replace.5. Defective or bound impeller. 5. Replace and clean.1. Defective.1. See “II.2.[ e ] Checking theController Board.”1. Motor winding opened.1. Replace.2. Bearing worn out.2. Replace.3. Wiring to fan motor.3. Check for looseconnection or open, andreplace.4. Fan blade bound.4. Check and replace.1. Defective.1. See “II.2.[ e ] Checking theController Board.”1. Undercharged.1. Check for leaks andrecharge.2. Air or moisture trapped.2. Replace drier, andrecharge.1. Defective valve.1. Replace.1. Continues to open in freeze 1. Check and replace.cycle.1. Stuck open.1. Replace.2. Diaphragm bleed port2. Clean or replaceclogged.diaphragm.29
2. Evaporator is Frozen UpPROBLEM[1] Freeze cycletime is toolong.POSSIBLE CAUSEa) Float Switchb) Water SolenoidValvec) Controller Board[2] All ice formed a) Evaporatoron evaporator b) Water Supply Linedoes not fallinto bin inc) Water Solenoidharvest cycle.Valve1. Leads short-circuit ordefective switch.2. Float does not move freely.1. Diaphragm does not close.1. Defective.1. Scaled up.1. Water pressure too low.1. Dirty mesh filter or orifice.2. Diaphragm does not close.d) Ambient and/orwater temperaturee) Thermistor1. Too cool.f) Controller Board1. Defrost timer is set tooshort.1. Out of position or looseattachment.2. Defective.[3] Othersa) Spray Tubesb) Water Systemc) Refrigerantd) Expansion Valvee) Hot Gas SolenoidValvef) Water Supply Lineg) Water Filter1. Clogged.2. Out of position.1. Dirty.1. Undercharged.1. Bulb out of position orloose attachment.2. Defective.1. Coil winding opened.2. Plunger does not move.3. Wiring to hot gas valve.1. Too small; requires 3/8” ODline dedicated per machine1. Flow rate too small.30REMEDY1. Check and replace.2. Clean or replace.1. Check for water leakswith icemaker off.1. See “II.2.[ e ] Checking theController Board.”1. Clean.1. Check and getrecommended pressure.1. Clean.2. Check for water leakswith icemaker off.1. Increase temperature.1. See “V. 10. Removaland Replacementof Thermistor.”1. Adjust longer, referringto “II. 2. [d] Controlsand Adjustments,2) Defrost Timer.”2. See "II.2.[e] Checking theController Board."1. Clean.2. Place in position.1. Clean.1. Check for leaks an
Jul 24, 2000 · 6 beeps every 3 sec. Low Voltage. Voltage is 92 Vac or less. 7 beeps every 3 sec. High Voltage. Control voltage 147 Vac 5%. The red LED will de-energize if voltage protection operates. The voltage safety automatically resets when voltage is corrected. The Output Test switch “S3” provides a relay sequence test. With power OFF, place S3File Size: 1MBPage Count: 51
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AWWA Class 250B flanged valves can be mated with either ANSI Class 125# or ANSI Class 250# flanges depending on the specified flange drilling. Class 250B valves can be mated with flat-faced or raised-face flanges with full face or ring gaskets and with no bolting restrictions. FIGURE 3. PUMP DISCHARGE FIGURE 4. UPSTREAM CHECK VALVE
CRESCENT CUBER MODEL SERVICE MANUAL KM-250BAF KM-250BWF NO.: ISSUED: REVISED: July 24, 2000 73094 December 22, 2004. 2 IMPORTANT Only qualified service technicians should attempt to service or maintain this icemaker. No such service or maintenance should be undertaken until the
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Yaesu VX-120 and VX-170 2 Meter Handheld Transceivers Short Takes: Comet CHA-250B Vertical Antenna . . Manual Push to Talk Operation Another front panel connection provides for PTT operation.
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and hold an annual E-Safety Week. Our Citizenship Award. 4 Through discussion in all our history themes – the rule of law is a key feature. RE and citizenship/PSHEE lessons cover religious laws, commandments and practices. In RE we encourage pupils to debate and discuss the reasons for laws so that all pupils understand the importance of them for their own protection. As part of the .
