Arctic-Temp®
Contents
1. Page 13 1000LSM By Pass and Isolation Loop for Low Ambient Controls Page 14 1000LSM By Pass and Isolation Loop for Low Ambient Controls Overview Page 15 Obsolete Pressure Regulating Valve prior to by pass loop Page 16 Arctic Tem 9 s Service Manual Rev 01 13 PRINCIPLES OF OPERATION The Arctic Temp line of ice making machines from Holiday Ice Inc combines state of the art technology and efficiency with a reputation for quality and reliability developed over four decades of manufacturing In the Arctic Temp ice maker ice is produced on vertically suspended double walled cylindrical evaporators Chilled water is continually recirculated over both the inner and outer surfaces of the evaporator as refrigerant passes through the annular space between the two ice making surfaces This process utilizes 100 of the evaporator surface and provides fast production with maximum efficiency of heat exchange Ice making water is recirculated by pump from the stainless steel sump where proper water level is maintained by a float valve Water flows onto both the inner and outer evaporator surfaces by simple tubed water distributors The freezing period is determined by a repeating cycle timer At completion of the freeze cycle hot gas from the compressor is introduced into the annular space The introduction of hot gas breaks the ice bond from the evaporator2. Discus compressors have a new protection system called Core Sense Protection It replaces the Sentronic Oil Protection control and the Kriwan motor overload module It incorporates oil pressure failure and motor overload protection in one unit C m CoreSense protection for Copeland Discus Compressors Status Codes J Flashes Condition GREEN Power On 1 Xx GREEN Warning Xi YELLOW Trip Xx RED Lockout If the oil pressure drops below nine pounds for 120 seconds the Core Sense will shut down and lock out the compressor In an overload condition the internal overload will open and stop the compressor until it cools down and then cycle on the overload The oil pressure feature will not trip while the compressor is off by the overload EMERSON Climate Technologies In the cover are indicator lights for the status codes If a problem exists the lights will flash indicating the area of the problem Oil Pressure Control trips can be caused by the following conditions a Excessive refrigerant in crankcase from overcharging or flood back b Sensor blocked with carbon or other debris in the screen C Crankcase heater is inoperative or power has been turned off d TXVs are maladjusted e Sentronic Control and or sensor inoperative or defective NOTE Models 400 750 5200 1000 are equipped with a Motor Overload Protection Device Klixon that opens in the event compr
3. manually operated ball valves An additional benefit is provided if the PRV fails due to a worn cartridge or ruptured internal parts it fails in the closed position The addition of the By Pass Loop will allow the machine to return to operation by changing ball valve positions without immediate service and repair AUTO SETTING The Pressure Regulating Valve must be set to the AUTO position in order to modulate and maintain head pressure for defrosting in Low Ambient Conditions The Adjustment Sequence is as follows Remove the acorn nut from the side of the valve that is marked AUTO and OPEN Arrows mark the direction to adjust With a slotted screwdriver turn the adjustment clockwise CW until it stops to set the control on AUTO automatic Replace the acorn nut The machine must be turned off during adjustments to avoid the hot discharge line and rotating fan SETTING THE PRV VALVE The Pressure Regulating valve is factory set to modulate and maintain head pressure of 225 PSIG on R 404A during the harvest cycle 185 PSIG on R 22 If it becomes necessary to adjust the pressure setting the window of adjustment is approximately 20 seconds after entering the harvest cycle When the machine enters harvest and the pressures equalize begin turning the adjustment stem until the discharge pressure reaches 225 PSIG Turn the adjusting stem clockwise CW to raises the pressure and counter clockwise CCW to lower the pre
4. that the fan controls are set incorrectly Rev 01 13 6 eee MACHINE CONTROLS re PRESSURE CONTROL Manual Reset mmmPENN P70NA 1 Sas The Model 5200AR uses a high low pressure switch is a single pole dual function switch It is located on the condensing unit and protects the samen Ml NEN machine from possible damage due to abnormal pressures during opera ule tion This control employs a SINGLE MANUAL RESET both high and low LA pressure trips The high pressure side is set to open in the event excessive ALL RANGE head pressure is reached The low pressure side is set to open in the event excessive low pressure is reached The disadvantage of this control is that the condition s that cause a trip can t be immediately identified as high pressure or low pressure However most trips are attributable to the low pressure side In addition nuisance trips will result from low ambient conditions which causes efficient condens ing and results in lower discharge and suction pressures The low head pressure will not force enough refrigerant through the expansion valves to elevate the suction pressure As a result a trip will occur when the safety point cut out on the low side is exceeded Common low pressure trips are attributable to freeze ups low ambient conditions failure to build head pressure insufficient refrigerant charge loss of water supply and restricted water distribution due to mineral deposits High Press
5. ALVE The Pressure Regulating valve is factory set to modulate and maintain head pressure of 225 PSIG on R 404A during the harvest cycle 185 PSIG on R 22 If it becomes necessary to adjust the pressure setting the window of adjustment is approximately 20 seconds after entering the harvest cycle When the machine enters harvest and the pressures equalize begin turning the adjustment stem until the discharge pressure reaches 225 PSIG Turn the adjusting stem clockwise CW to raises the pressure and counter clockwise CCW to lower the pressure Adjustment pressures must be read at the inlet port fitting of the Pressure Regulating Valve 1000LSM BY PASS LOOP ADVISEMENT 2011 Rev 01 13 15 SETTING POINT TO MACHINE CONTROLS PRESSURE REGULATING VALVE OBSOLETE PRIOR TO BY PASS LOOP mememe OPTIONAL PRESSURE REGULATING VALVE FOR LOW AMBIENT OPERATION This machine is equipped with a Parker Hannifin Pressure Regulating Valve and ACORN MAINTAIN HEAD PRESSURE a Condenser return Bypass controlled by a solenoid valve to aid operation in Nut reduced ambient temperatures Rev INLET PORT FITTING Auto amp OPEN ADJUSTMENTS If you have any questions regarding this Low Ambient Provision please call 800 362 3243 before proceeding ADJUSTING FOR SEASONS To adjust for the wide range of seasonal temperatures it is suggested the following controls settings are used for the applicable seasons WINT
6. ER OPERATION Set control to AUTO SUMMER OPERATION Set control to OPEN BYPASSED ADJUSTMENT SEQUENCE Remove the ACORN nut from the side of the valve that is marked AUTO and OPEN Arrows mark the direction to adjust A slotted screwdriver is required The machine must be turned off during adjustments to avoid the hot discharge line and rotating fan AUTO SETTING Turn the adjustment clockwise CW until it stops to set the control on AUTO automatic Replace the acorn nut The PRV must be set to the AUTO position in order to modulate and maintain head pressure for defrosting in Low Ambient Conditions OPEN SETTING BYPASSED Turn the adjustment counter clockwise CCW until it stops to OPEN the control Replace the acorn nut When the valve is in the OPEN position the piston is moving from internal gas pressure and 2 PSIG through the bleed port will open the piston and allow gas flow 01 13 OVERVIEW OF OPERATION The Pressure Regulating Valve is installed in the discharge line and factory set to modulate or close when discharge pressure falls to 225 PSIG R 404A 180 PSIG R 22 to aid the harvest cycle in low ambient conditions At 180 PSIG the valve modulates closes and terminates all discharge flow to the condenser The discharge gas is directed to the hot gas line and will aid the harvest by heat of compression An additional circuit from the condenser inlet to the suctio
7. Rev 01 13 Inetc lemp ICE MAKERS Index Principles of ODE Eoo aos een a eee cre ene eee er eee eee eee eee Page 2 Model Specifications Sheet 5200LSM 2 R404A amp R22 comparative Page 3 Model Specifications Sheet 1000LSM R404A amp R22 comparative Page 4 Cycle Timer FUNGON deo stes pn nt ddr ue mu M kr ramp RAN esi Doe up Punt Page 5 Positive Harvest COntFol aues cencabelisa si nio si Mes edt Dre vipi NER EE Ep Iv FUN e ei apa Page 6 Fan Cy Chine Cott RRE Page 6 Dual Pressure COontebl ascen base ism e ie e aeu R e baa eid Page 7 High Pressgre Controls pdli ee pd UicS teh p a ORE eUD bti EUER Page 7 Low Pressure Contro w Time Delay a ouccecusdeeo aste in UN Gam Ee pa CU aet vetta ud Ye Page 8 Copeland Sentronic Oil Pressure Controlla e di P ad sopa e ona CHIP LM EUR op e nebds Page 8 Core Sense Protectii usu cepere iu DUE EU BN I Uh tei eat abc net iai teer E eaS Page 9 Electronic THE POBSDIE entente pa esa SIUS tun Oe reenter ent arrest a en Page 9 Hot Gas Solenoid Valves on 40 Aetolis cope pond pip ER APER E MM EN U RA POR LSU LIS ESQ Page 10 Thermostatic Expansion Vales ouest parte bord unten iced oe et Page 10 Mechanical Duc OD naa adsmsusco qtio sippepn t nets npud tp rudi Page 11 5200LSM 2 By Pass and Isolation Loop for Low Ambient Controls Page 12 5200LSM 2 By Pass and Isolation Loop for Low Ambient Controls Overview
8. because the safety point cut out on the low side is exceeded The time delay on this control will aid in the reduction of nuisance trips by providing the machine 60 additional seconds to build the necessary operating pressures above the set point This control must be set and checked with a volt meter connected to switch terminals 1 amp 2 on the control As the suction pressure drops the meter reading will drop to zero volts at the set point The delay will then be activated allowing the machine to run for and additional 60 seconds If the suction pressure remains below the set point for more than 60 seconds the machine will shut down NOTE The intended benefit of this control is often negated by the failure to set this control correctly ao SENTRONIC OIL PRESSURE CONTROL Manual Reset aay Provided as standard equipment SENTRONIC OL PRESSURE SENSING SYSTEM The compressor is protected by a Copeland Sentronic Oil Pressure Control This electronic unit consists of a manual reset control with a time delay and utilizes a sending unit attached to the oil pump to monitor oil pressure electronically If the net oil pressure net oil pressure is pump pressure minus the suction pressure falls between the differential setting of 9 PSIG the compressor will continue to run for 120 seconds attempting to build the required oil pressure If the differential pressure has not been achieved within the d
9. cing the adjustment stem adjust as follows 1 Remove TXV cap accessed by removing nut Rev 01 13 2 Close TXV Turn stem clockwise to freeze lower on the tubes turning in M MM PRSE 3 Open TXV Turn stem counter clockwise to freeze higher on the tube backing out 4 Note Any adjustment to the TXV should be turn or less at a time The machine should be observed for several minutes before making further changes TXV STRAINER The strainer should be checked before making any adjustment to the valve The TXV valves are preset at the factory However ash or debris in the system could block the strainer and cause improper flow This condition will most likely occur in a new machine that is remotely installed in the field Multiple cleanings may be required if erratic freezing occurs Note The machine must be pumped down prior to opening the strainers and should be performed by a qualified refrigeration technician 10 eee MACHINE CONTROLS EENENEEEEEEEEEEEEEEN BIN CONTROL smummmmmmm nna A mechanical flapper device is used to terminate ice production when the storage bin or bunker is full It is recommended for use in refrigerated freezer and other applications that would adversely affect the use of a thermostat type control This control will allow the ice maker to run until the flapper is hel
10. d in the down position by accumulated ice DELIVERY UTE A secondary bin delay micro switch is used as a lockout feature See the Bin Lockout illustration in the Cycle Timer Functions Narrative The Mechanical Bin Control switching relay and low voltage transformer is located on a mounting rail directly under the main control box in the evaporator section When the amber light is illuminated on the Mechanical Bin Control box the machine is OFF on FULL BIN 1 Mechanical Bin Control Flapper Assembly in stalled on ice delivery chute 2 Mechanical Bin Flapper Assembly installed on ice delivery chute 3 Mechanical Bin Flapper Assembly switch EVAPORATOR positions HousiNG WiRE MECHANICAL BIN FLAPPER MECHANISM m dd ToP viEW DELIVERY CHUTE DELIVERY CHUTE PADDLE POSITIONS ICE NON HARVEST CE HARVEST POSITION POSITION SwitcH OPEN SwitcH CLosED BACK SIDE OF Back View DELIVERY CHUTE DRILL Two 3 16 HOLES 2 1 2 At AMBER LIGHT IS ON INDICATING MACHINE IS OFF ON FULL BIN Rev 01 13 11 HOLIDAY ICE INC 5200LSM BY PASS amp ISOLATION LOOP FOR LOW AMBIENT CONTROLS 1 LOW AMBIENT OPERATION WINTER SEASON a Turn machine switch to the OFF position b CLOSE BALL VALVE IN DISCHARGE LINE RED color code c OPEN 2 BALL VALVES IN BY PASS LINE BLUE color code d Turn machine switch to the ON position NOTE Acorn nut adjustment must be in the AUTO position in order for the Pressure Re
11. de energize the timer motor allowing for additional harvest time until the suction pressure reaches 82 PSIG R404 A At 82 PSIG the relay is de energized allowing the normally closed contacts to restart the timer motor in its normal operation The period of time required for the pressure switch to reach cutout PSIG varies with ambient temperature Delay is minimal in warmer ambient temperatures The pilot light is illuminated upon entry of harvest and will remain on until resetting of the control occurs at approximately 82 PSIG NOTE 1 When the red pilot light is illuminated the timer motor is locked out of the circuit and timer rotation is stopped Low ambient conditions that cause the ma chine to continue to operate in harvest may result in compressor failure NOTE 2 Condenser fans must be off during the harvest cycle to avoid freeze ups and other control failure trips Settings Cutin Cut Out D CYCLING CONTROL mmm PENN P70AA 11 8 E Penn fan cycling controls are used to regulate head pressure by cycling the condenser fans motors The switch is used to cycle the fan motors on and off at a specific setting The Model 1000LSM operates with dual fan cycling controls that are staged The Model 5200AR operates with a single fan control that operates both fans on the same cycling Um sequence d T OF PRESSURE NOTE Condenser fans that are operating during the harvest cycle is a clear indication
12. e the cam allows for a total cycle of 6 or 8 minutes Freeze phase is 90 and harvest phase is 10 of the total time D CYCLE Bin Control Lockout Rotating Freezing time is approximately 90 of the total eight 8 Micro Switch Cam minute cycle and controlled by a repeating cycle timer with a single cam 1 Compressor is running 2 Recirculating water pump is running 3 Hot gas solenoid s are is closed 4 Ice crusher motor is off When the timer has reached the end of the freeze cycle the roller on the micro switch will enter the detent position of the cam on the primary micro switch and initiate the harvest cycle Primary Micro Switch D CYCLE PENER Bin Control Lockout Rotating Harvest time is approximately 10 of the total time cycle Micro Switch Cam 1 Compressor is running 2 Recirculating water pump is stopped 3 Hot gas solenoid s are is open 4 Ice crusher motor is on At the start of this cycle the positive harvest control PHC pressure switch and its associated relay pilot light will operate and hold the timer motor out of the electric circuit until the suction pressure reaches 82 90 PSIG R404 A depending on the specific machine model at which time the ice will start to drop and enter the crusher All ice should be off the evaporators and through the crusher within 10 15 seconds The harvest cycle will continue for another 20 30 seconds period which is called overrun At completion of over
13. elay period the switch contact will open and stop the compressor Oil Pressure Control trips can be caused by the following conditions a Excessive refrigerant in crankcase from overcharging or flood back b Sensor blocked with carbon or other debris in the screen c Crankcase heater is inoperative or power has been turned off d TXVs are maladjusted e Sentronic Control and or sensor inoperative or defective NOTE Models 400 750 5200 1000 are equipped with a Motor Overload Protection Device Klixon that opens in the event compressor temperature or amperage reaches an extreme that could damage the compressor The device automatically reset after the compressor has cooled If the Klixon opens in order to protect the compressor motor the oil pressure control will trip 60 seconds later because the compressor is not running Therefore the operator will assume the machine was off on oil pressure when in fact it was off on the Motor Overload WARNING If the machine is off on the Oil Pressure Control due to an oil problem or as a result of the Motor Overload Protection Device the control cycle timer and other components will continue to function although the compressor is off The machine or any of its components INCLUDING THE ICE CRUSHER ASSEMBLY can start without warning and cause serious personal injury Rev 01 13 8 ee MACHINE CONTROLS EENEEEEEEEEEEEEEEN PROTECTION m CONTROL memm The Copeland
14. ernal parts of solenoid valves during assembly alleviates the majority of problems in start up and field operations The manufacturer Sporlan Valve Company has denied any knowledge of a sticking problem However they have issued field directives regarding the possibility of Residual Magnetism in the plunger assembly and shipped these valves with brass washer to break the residual magnetism for over a year That theory has now been discounted and we believe the issue is related to lack of oil and higher operating pressures Sporlan is now experimenting with a new disc assembly that adds a secondary port to provide more above the disc pressure to provide for positive closing We are now testing the new discs and have a limited number available for field replacement when required THERMOSTATIC EXPANSION VALVES memm ADJUSTING TXV Ice should form on the evaporator tubes no higher than approximately two inches from the top of the evaporator plates Freezing too high on the evaporator could cause ice to freeze around the mounting flange and not release resulting in a freeze up Low ambient situations will affect the capacity and produce thicker ice and possibly freezing over the evaporator plates resulting in a freeze up Out Capillary Bulb on Suction Line Power Head Adjustment Stem Close TXV Clockwise freeze lower on tubes Remove TXV cap Expansion Valve inlet Screen strainer can be While fa
15. essor temperature or amperage reaches an extreme that could damage the compressor The device automatically reset after the compressor has cooled If the Klixon opens in order to protect the compressor motor the oil pressure control will trip 60 seconds later because the compressor is not running Therefore the operator will assume the machine was off on oil pressure when in fact it was off on the Motor Overload WARNING If the machine is off on the Oil Pressure Control due to an oil problem or as a result of the Motor Overload Protection Device the control cycle timer and other components will continue to function although the compressor is off The machine or any of its components INCLUDING THE ICE CRUSHER ASSEMBLY can start without warning and cause serious personal injury D THERMOSTAT mmm RANCO ETC 111 000 000 meme This control is provided as an optional feature for machines located outdoors in periods of low ambient weather This control may be used in conjunction with other low ambient devices and controls to ensure harvest and uninterrupted operation at temperatures less than 50 degrees Fahrenheit The factory set point is 50 degrees Fahrenheit with a 5 degree differential which will allow the machine to operate at temperatures above 45 degrees Fahrenheit When the menu scrolls up set the thermostat to operate in the H 1 mode a When the thermostat is activated and the machine is shut down the amber light on the bin RANCO C
16. gulating valve to operate 2 HIGH AMBIENT OPERATION SUMMER SEASON a Turn machine switch to the OFF position b OPEN BALL VALVE IN DISCHARGE LINE RED color code c CLOSE 2 BALL VALVES IN BY PASS LINE BLUE color code d Turn machine switch to the ON position NOTE All retrofitted and new machines with By Pass Loops and 1 1 8 Pressure regulating valves are shipped with the balls valves set for the HIGH AMBIENT POSITION When switching to LOW AMBIENT POSITION please note that the PRV control is preset to modulate at 225 PSIG R 404A and the Acorn nut is in the AUTO position No adjustment to the Pressure Regulating Valve is required Call 407 831 2077 for technical support regarding this device Rev 01 13 12 MODEL 5200LSM 2 BY PASS amp ISOLATION LOOP FOR LOW AMBIENT CONTROLS OVERVIEW Machines equipped with Low Ambient Controls operating in extremely high ambient conditions can produce spikes in head pressure on start up resulting in nuisance high pressure trips Although the PRV has an AUTO and OPEN position it is believed that this control is not adjusted for summer and winter operation Therefore the machine will produce excessive head pressure when starting in high ambient conditions when the PRV valve is engaged in the AUTO POSITION The addition of a By Pass and Isolation Loop allows the Low Ambient Device to be completely isolated from the refrigeration system while operating in HIGH AMBIENT CONDITIONS with 3
17. hat require no maintenance other than occasional cleaning Ice Handling System At completion of the freeze cycle hot gas from the compressor is introduced into the cylinder Gravity forces the ice to slip from the evaporator surfaces into the ice crusher assembly where the curved ice is cracked into irregular shapes and sizes delivered across the grid and discharged into the storage bin or bunker The Arctic Temp ice maker presents no peculiar complex or out of the ordinary hookups in any of its subsystems Most replacement parts are readily available at local supply houses ARCTIC TEMP ICE MAKER MODEL MODEL SPECIFICATIONS 5200LSM SUPPLIED WITH LARKIN CONDENSING UNIT R 404A R 22 ELECTRICAL Volts Phase Hertz 208 230 3 60 Total F L A Rating Machine and Compressor COMPRESSOR GE CONTROL SETTING APPROXIMATE R 404A R 22 FAN SWITCH PRIMARY P70AA 118 ON 280 Orr 245 ON 235 OFF 205 PSIG FIXED DIFFERENTIAL OF 30 PSIG NOMINAL o HiGH PRESSURE P70DA 1 345 PSIG IF YOU HAVE ANY QUESTIONS REGARDING THE INSTALLATION AND OPERATION OF THIS MACHINE PLEASE CALL FOR TECHNICAL ADVISE BEFORE PROCEEDING 800 362 3243 OR 407 831 2077 Note Crankcase heaters are installed on Arctic Temp ice makers Heater leads are connected to the L1 L2 position of the line contactor CRANKCASE HEATER SHOULD BE ENERGIZED FOR TWO HOURS PRIOR TO STARTING THE MACHINE Manufactured by HOLIDAY ICE INC Longwood FL 32750 Specifications a
18. n accumulator inlet is opened by a Hot Gas Solenoid Valve This circuit allows condenser vapor to be introduced into the compressor after it has passed through the suction accumula tor The returned vapor provides additional refrigerant to aid in harvest Low ambient advisement modified Narrative only Does not contain flow chart drawing SETTING THE PRV VALVE TO MAINTAIN HEAD PRESSURE 5 16 SQUARE HEAD ON BELL NOTE Pressure settings or changes can t be made to this valve until the acorn nut adjustment has been adjusted to the AUTO setting The Pressure Regulating valve is factory set to modulate and maintain head pressure of 225 PSIG on R 404A during the harvest cycle 185 PSIG on R 22 If it becomes necessary to adjust the pressure setting the window of adjustment is approximately 20 seconds after entering the harvest cycle When the machine enters harvest and the pressures equalize begin turning the adjustment stem until the discharge pressure reaches 225 PSIG Turn the adjusting stem clockwise CW to raise the pressure and counter clockwise CCW to lower the pressure Adjustment pressures must be read at the inlet port fitting of the PRV Valve 16
19. nd design subject to change without notice Arctic Temp is a registered trademark of Holiday Ice Inc 2009 Jan 2010 RRA Saved as 5200 Comparative R 404A amp R 22 2010 Rev 01 13 3 ARCTIC TEMP ICE MAKER MODEL MODEL SPECIFICATIONS 1000LSM SUPPLIED WITH LARKIN CONDENSING UNIT R 404A R 22 ELECTRICAL Volts Phase Hertz 208 230 3 60 208 230 3 60 Total F L A Rating Machine and Compressor 56 7 66 3 s COMPRESSOR D CONTROL SETTING APPROXIMATE R 404A R 22 OiL PRESSURE CONTROL DIFFERENTIAL 9 MINIMUM 9 MINIMUM SUCTION PRESSURE AT HARVEST 20 PSIG IF YOU HAVE ANY QUESTIONS REGARDING THE INSTALLATION AND OPERATION OF THIS MACHINE PLEASE CALL FOR TECHNICAL ADVISE BEFORE PROCEEDING 800 362 3243 OR 407 831 2077 Note Crankcase heaters are installed on Arctic Temp ice makers Heater leads are connected to the L 1 L2 position of the line contactor CRANKCASE HEATER SHOULD BE ENERGIZED FOR TWO HOURS PRIOR TO STARTING THE MACHINE Manufactured by HOLIDAY ICE INC Longwood FL 32750 Specifications and design subject to change without notice Arctic Temp is a registered trademark of Holiday Ice Inc 2009 Jan 2010 RRA Saved as 1000 Comparative R 404 amp R 22 Rev 01 13 4 ee CYCLE TIMER FUNCTIONS EEEEEEEEEEEEEEEEENIZNZZZZRZIZIZZAMI Cycle Timer Arctic Temp ice makers utilize a repeating cycle timer with a single cam to control the freeze and harvest cycles Depending upon the machin
20. onraot control will be illuminated Please note that the amber light also may indicate a full bin of ice and the mechanical bin control is satisfied Note Sensor Bulb should be threaded through grommet and secured by the clamp on the outside of the machine frame When this control has the machine shut down at the set point full bin will be indicated by the amber light on the mechanical bin control The timer will be in the Lock Out Detent Rev 01 13 9 eee MACHINE CONTROLS EENEEEEEEEEEEEEEEN r HOT GAS SOLENOID VALVES ON R 404A memm Arctic Temp Ice Makers are defrosted with Hot Gas Solenoid Valves One solenoid valve and one expansion valve control two evaporators These solenoids have been used continually for over 20 years without any significant problems or complaints Disc Assembly With the introduction of R 404A and its known deficiency for oil return and velocity some problems have occurred A small number of new machines have developed sticking in the solenoid valves on start up The condition involves the disc opening and sticking in the open position The pressures above and below the disc control the disc operation Itis believed that the lack of oil in R 404A systems has contributed to this problem by not allowing the disc to reseat itself after harvest Primary Port 035 Secondary Port 040 60 drill Holiday Ice has discovered that oiling the int
21. run the freeze cycle is initiated Primary d Micro Switch Note When red pilot light is on timer is stopped pe LOCKOUT Bin Control Lockout Rotating Bin thermostats mechanical bin controls and remote OFF Micro Switch Cam ON switches may be activated at any time during the freeze Bin Control Lockout Rotating and harvest cycles Machine operation will continue upon Micro switch Cam opening any of these controls and machine shutdown will be delayed until the roller on the bin control lockout micro switch is in the detent position of the cam Low ambient thermostats when activated will shut the machine down with this lock out Micro Switch Note Most cycle timer problems are attributable to failed micro switches or roller guides that are not centered on the edge of the cam Rev 01 13 5 eee MACHINE CONTROLS EENEEEEEEEEEEEEEEN re HARVEST CONTROL a PENN P70CA 1 mmm The positive harvest is controlled with a reverse acting low pressure control switch ing relay and red pilot light This control works in conjunction with the timer to ensure hot gas is provided to the ice making evaporators to assist harvest in lower ambient temperatures or over condensing cause by excessive wind on the coil ALL RANGE As the suction pressure falls on the low pressure side to approximately 40 PSIG for an R 404A system the low pressure control closes When the machine enters harvest the low pressure control and relay
22. ssure Adjustment pressures must be read at the inlet port fitting of the Pressure Regulating Valve 5200LSM BY PASS LOOP ADVISEMENT 2011 Rev 01 13 13 HOLIDAY ICE INC 1000LSM BY PASS amp ISOLATION LOOP FOR LOW AMBIENT CONTROLS 1 LOW AMBIENT OPERATION WINTER SEASON a Turn machine switch to the OFF position b CLOSE BALL VALVE IN DISCHARGE LINE RED color code c OPEN 2 BALL VALVES IN BY PASS LINE BLUE color code d Turn machine switch to the ON position NOTE Acorn nut adjustment must be in the AUTO position in order for the Pressure Regulating valve to operate 2 HIGH AMBIENT OPERATION SUMMER SEASON a Turn machine switch to the OFF position b OPEN BALL VALVE IN DISCHARGE LINE RED color code c CLOSE 2 BALL VALVES IN BY PASS LINE BLUE color code d Turn machine switch to the ON position NOTE All retrofitted and new machines with By Pass Loops and 1 1 8 Pressure regulating valves are shipped with the balls valves set for the HIGH AMBIENT POSITION When switching to LOW AMBIENT POSITION please note that the PRV control is preset to modulate at 225 PSIG R 404A and the Acorn nut is in the AUTO position No adjustment to the Pressure Regulating Valve is required Call 407 831 2077 for technical support regarding this device Rev 01 13 14 MODEL 1000LSM BY PASS amp ISOLATION LOOP FOR LOW AMBIENT CONTROLS OVERVIEW Machines equipped with Low Ambient Controls operating in extremely high ambient condi
23. surface releasing the concentric cylinders of ice which fall by gravity into the ice crusher assembly Here the curved ice is cracked into irregular shapes and sizes The rotation of the ice crusher delivers the ice across the grid and discharges it into the storage bin or bunker A bin control stops the ice maker when the storage bin becomes full The Arctic Temp ice maker consists of four interrelated subsystems as follows Refrigeration System The Arctic Temp refrigeration system offers the ultimate in simplicity The basic refrigeration system includes a non circulated Arctic Temp evaporator and a dependable Copeland compressor The Arctic Temp refrigeration system is readily maintained with standard service tools and procedures and differs from a standard refrigeration system only in its simplicity Refrigerant Condensing System The Arctic Temp ice maker employs one of three methods of condensing the dependable Copeland condensing unit the Copeland Discus compressor with a matched condensing coil or a Copeland Discus water cooled condensing unit All three condensing methods produce adequate capacity A fan cycling control or water regulating valve maintains head pressure Process Water System Ice making water is recirculated by centrifugal pump from the stainless steel sump which utilizes a float valve to maintain the proper water level Water flows onto both the inner and outer evaporator surfaces by simple tubed water distributors t
24. tions can produce spikes in head pressure on start up resulting in nuisance high pressure trips Although the PRV has an AUTO and OPEN position it is believed that this control is not adjusted for summer and winter operation Therefore the machine will produce excessive head pressure when starting in high ambient conditions when the PRV valve is engaged in the AUTO POSITION The addition of a By Pass and Isolation Loop allows the Low Ambient Device to be completely isolated from the refrigeration system while operating in HIGH AMBIENT CONDITIONS with 3 manually operated ball valves An additional benefit is provided if the PRV fails due to a worn cartridge or ruptured internal parts it fails in the closed position The addition of the By Pass Loop will allow the machine to return to operation by changing ball valve positions without immediate service and repair AUTO SETTING The Pressure Regulating Valve must be set to the AUTO position in order to modulate and maintain head pressure for defrosting in Low Ambient Conditions The Adjustment Sequence is as follows Remove the acorn nut from the side of the valve that is marked AUTO and OPEN Arrows mark the direction to adjust With a slotted screwdriver turn the adjustment clockwise CW until it stops to set the control on AUTO automatic Replace the acorn nut The machine must be turned off during adjustments to avoid the hot discharge line and rotating fan SETTING THE PRV V
25. ure The high pressure side is set to open in the event excessive head pressure is reached This can occur if the condenser coil is dirty or blocked a fan motor fails or a control fails Low Pressure The low pressure side is set to open in the event excessive low pressure is reached This may oc cur if the machine has insufficient refrigerant charge a loss of water to the evaporator surfaces or a freeze up which allows ice to remain on the evaporator surfaces Control settings for cut in and cut out vary according to machine model Please refer to Model Specifications sheet for correct control settings PRESSURE CONTROL Manual Reset mmmPENN P70DA 1 m Rev 01 13 The Model 1000LSM and the model 5200LSM 2 use a stand alone high pressure switch that provides the same function and operation of the high safety operation control identified above A trip of this switch easily identifies that the condition that caused the trip was high pres dio sure ALL RANGE ee MACHINE CONTROLS EEEEEEEEEEEEEEEN PRESSURE CONTROL W TIME DELAY Manual Reset mmuPENN P29NC 3 m The Model 1000LSM and the model 5200LSM 2 use this control which aids in low ambient starting conditions by providing a 60 second time delay to avoid low pressure trips when starting in cold weather In low ambient conditions the head pressure will not force enough refrigerant through the expansion valves to elevate the suction pressure As a result a control trip occurs
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