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Heatcraft Refrigeration Products H-IM-711C5, Installation & Operating Instructions Manual, Page: 29 / 48

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Heatcraft Refrigeration Products H-IM-711C5 Installation & Operating Instructions Manual Download Page 29

29

Preventive Maintenance

Routine preventive maintenance of any mechanical equipment is critical to its long term
reliability. During even normal operation all equipment will expeerience some deterioration
during its lifetime caused by wear and evironmental influences. For that reason, regularly
scheduled maintenance of your refrigeration equipment is required in order to keep it
operating to its maximum efficiency while avoiding potentially costly repairs of a premature
failure due to equipment neglect. The following is Heatcraft’s minimum recommendations
for regularly scheduled preventive maintenance of your 7-Eleven refrigeration system.
Qualified and licensed refrigeration companies only should perform all preventive and
corrective maintenance on refrigeration equipment. While we cannot guarantee that close
adherence to these recommendations will eliminate all equipment problems, it will greatly
reduce the potential for mechanical and electrical failures thus providing increased
reliability.

Go to pages 30-31 for the Preventive Maintenance Tables.

Summary of Contents for H-IM-711C5

Page 1: ...1 Field Wiring 12 13 Beacon II Controller 14 26 Refrigeration Charging 27 Operational Check Out 28 System Balancing 28 Preventive Maintenance 29 31 Diagnostics 32 35 Parts 36 Wiring Diagrams 37 42 Start up Checklist 43 44 INSTALLATION OPERATING INSTRUCTIONS MCCU Condensing Units 2175 W Park Place Blvd Stone Mountain Georgia 30087 770 465 5600 Fax 770 465 5990 www heatcraftrpd com e mail hrpd feedb...

Page 2: ...maged material becomes the delivering carrier s responsibility and should not be returned to the manufacturer unless prior approval is given to do so When uncrating care should be taken to prevent damage Heavy equipment should be left on its shipping base until it has been moved to the final location Condensing Unit Specifications Figure 1 Condensing Unit Unit Unit Model Compressor Location Voltag...

Page 3: ...ooler 2 20 800 77 50 65 25 1 1 8 1 2 2 0 82 TL53SB2N Freezer 3 5 300 46 50 49 13 16 50 7 8 1 2 1 5 8 50 53 LET047BHB2N6K Ice Storage 2 4 700 29 50 17 25 5 8 1 2 0 5 3 9 29 ADT130BHB2N2K Cooler 2 13 000 45 50 33 25 7 8 1 2 1 0 53 ADT130BHB2N2K Cooler 2 13 000 45 50 33 25 7 8 1 2 1 0 53 ADT156BHB2N2K Cooler 2 15 600 61 50 49 25 7 8 1 2 1 5 67 ADT156BHB2N2K Cooler 2 15 600 61 50 49 25 7 8 1 2 1 5 67 ...

Page 4: ... drainage for defrost water H Total height of unit coil surface Always avoid placement of Unit Coolers directly above doors and door openings where low temperature is being maintained and wherever possible for medium temperature NOTE NOTE Whenever possible always try to position the evaporator to blow towards the vault door Never position it over or adjacent to a door opening Elevation view of gla...

Page 5: ...Corrosive atmospheres require custom designed condensers Another consideration which must be taken is that the unit should be mounted away from noise sensitive spaces and must have adequate support to avoid vibration and noise transmission into the building Units should be mounted over corridors utility areas rest rooms and other auxiliary areas where high levels of sound are not an important fact...

Page 6: ...ed and Sealed Top of Roof Curb Disconnect Figure 5 Condensing Unit Rigging Adequate rigging measures must be taken to support unit weight and to protect the unit from damage during unloading and placement process Rigging holes have been provided in legs and under the unit compressor compartment frame to assist Spreader bars may be used to protect unit from damage ...

Page 7: ...perature sensor attached to suction line on Beacon II systems before brazing of the solder joint internally Flux only the male portion of the connection never the female After brazing remove excess flux j Wrap expansion valves with wet rags during brazing to the liquid line CAUTION If the temperature gets too high these components may be damaged Heat absorbing compounds or wet rags must be used to...

Page 8: ... drain lines should be used and properly protected from freezing In running drain lines provide a minimum of 4 inches per foot pitch for proper drainage Drain lines should be at least as large as the evaporator drain connection All plumbing connections should be made in accordance with local plumbing codes All condensate drain lines must be trapped and run to an open drain They must never be conne...

Page 9: ...ue the copper tubing 4 Do not use short radius ells Short radius elbows have points of excessive stress concentration and are subject to breakage at these points 5 Thoroughly inspect all piping after the equipment is in operation and add supports wherever line vibration is significantly greater than most of the other piping Extra supports are relatively inexpensive as compared to refrigerant loss ...

Page 10: ...on scheme The 4 PVC pipe penetrations shown above is a guide for all parties involved Head Pressure Controls Heatcraft does NOT supply headmaster control for the individual display case circuits Refer to case manufacturers installation instructions for specific provisions needed for head pressure control Note Heatcraft does include headmaster controls on the ice machine circuit If the ice machine ...

Page 11: ... molecule size of HFC s they will tend to leak more readily than CFC Consequently it is of the utmost importance that proper system evacuation and leak detection procedures be employed Copeland recommends a minimum evacuation to 500 microns In addition a vacuum decay test is strongly recommended to assure there is not a large pressure differential between the system and vacuum pump Good evacuation...

Page 12: ...re type should be of copper conductor only and of the proper size to handle the connected load 4 The unit must be grounded 5 For multiple evaporator systems follow the wiring diagrams for multiple evaporator systems carefully This will assure complete defrost of all evaporators in the system 6 If a remote defrost Timer is to be used the Timer should be located outside the refrigerated space Hoshiz...

Page 13: ...ing connections including the factory terminals Factory connections can vibrate loose during shipment 1 The nameplate on the unit is marked with the electrical characteristic for wiring the unit 2 Consult the wiring diagram in the unit cooler and in the condensing unit for proper connections 3 Wire type should be of copper conductor only and of the proper size to handle the connected load 4 The un...

Page 14: ...o start up The Beacon II should be de energized for this period by placing it in the SERVICE MODE This is done by pressing the FORCE SERVICE button twice To start the system cooling press the CLEAR button Room sensors must be left connected on ALL evaporators A pressure transducer is installed on the evaporator Do not leak test system above 150 PSI or damage to transducer could occur Condensing Un...

Page 15: ...oltage leads are required to connect the condensing unit to the evaporator see wiring diagram Two of these leads are for connecting the outdoor temperature sensor The other three leads are for connecting the compressor relay service relay and 24V Common inputs All 24 volt wiring must be run separate from the line voltage wiring Low voltage wiring must be 18 gauge minimum For low voltage wiring max...

Page 16: ...lay BOX TEMPERATURE and Coo When the room thermostat setting is satisfied and if the compressor ran for at least 2 minutes the EEV will close and the compressor will pumpdown and shut off The evaporator fans will continue to run The LED will alternately display oFF and BOX TEMPERATURE When the room sensor detects a rise in temperature of approximately 2 F and the compressor has been off for at lea...

Page 17: ...the ENTER button is not pressed the value will not be stored in the memory and thus will not be changed PROGRAM REVIEW ITEMS A E Set Defrost Type Air or ELE rEF Set Refrigerant Type R22 R404A or R507 bot Set Box Temperature 30 F to 70 F SUP Set Superheat 4 F to 20 F SLA Set Board as a Slave Yes or No dFn Set Number of Defrosts Per Day 1 2 3 4 5 6 8 10 or 12 per day dFF Set Defrost Fail safe Time 1...

Page 18: ...compressor Default 8 F Evaporator Board SLAVE SLA On multiple evaporator systems each evaporator board has to be programmed to be a MASTER or a SLAVE Each board is shipped from our factory set as a MASTER You must make this change to each SLAVE evaporator A selection of YES is made for this setting Default MASTER on each board For a single evaporator system no change is required Number of Defrosts...

Page 19: ... to 255 steps SCt Suction Temperature F SSt Saturated Suction Temperature F SCP Suction Pressure at Evaporator PSIG HG Odt Outdoor Temperature F dFt Defrost Sensor Temperature F dFE Last Defrost Elapsed Time minutes AC Board Voltage SPt Spare Temperature Reading Use this button to FORCE DEFROST To force a defrost press the FORCE DEFROST button The system will pumpdown and shut off the compressor T...

Page 20: ...odes Status LED Display Description OFF Box Temp oFF Box Temperature Mode is displayed All Evaporators COOLING Single Evaporator Box Temp Coo Box Temperature Mode is displayed Multiple Evaporators Master Evap Box Temp Coo Box Temperature Mode is displayed Slave Evaps Coo Operating Mode is displayed Pumpdown All Evaporators Pdn DEFROST All Evaporators dEF TEST All Evaporators tSt SERVICE All Evapor...

Page 21: ...will have one or more fans cycle on Pressure Fan Cycling switch An adjustable Time Delay relay factory set at 1 minute is wired across the Low Pressure Switch LPS In cold ambient this allows time for the suction pressure to build up and prevent nuisance tripping of the LPS In warmer ambient this time delay relay can be adjusted to 0 minutes Pumpdown At the end of each cooling cycle when the box te...

Page 22: ...st defrost at 10 00 AM To accomplish this use the PROGRAM REVIEW button to scroll to dFS Use the SELECTOR switch to select 2 hours delay start then press ENTER The first defrost will now occur at 10 00 AM and then a defrost will occur every 6 hours thereafter DEFROST SCHEDULE IN MEMORY Beacon II does not have a real time clock but it keeps track of the time that has elapsed in its memory It also k...

Page 23: ...temperature Placing the system in the Service mode or turning off power will clear the A3 Alarm Replacing the Room Sensor Suction sensor or Pressure Transducer will clear the A4 Alarm Error Indicator LED At initial power up each Beacon II board checks for system errors The system error check involves checking the various temperature sensors to determine whether any of these sensors are shorted or ...

Page 24: ...terminals for customers who may want to monitor an additional temperature or items such as Product Temperature This input terminal requires a signal from a thermistor which meets the temperature resistance values in Table 4 below If a product temperature simulator is used it must meet the resistance temperature specification listed in Table 4 below The temperature range for this input is 30 F to 1...

Page 25: ...Box Temperature bot 35 F 10 F Superheat SUP 8 F 8 F Slave Evaporator SLA No No No of Defrosts Per Day dFn 2 4 Defrost Fail Safe Time dFF 40 min 30 min Defrost End Temperature dFt 45 F 60 F Defrost Delay Start Time dFS 0 hrs 0 hrs Alarm High Temperature ALH 50 F 5 F Alarm Low Temperature ALL 30 F 15 F Alarm Time ALt 60 min 60 min Temperature Units F C F F ...

Page 26: ...running use the MONITOR button to display SCP Evaporator Suction Pressure Record the pressure displayed While the system is running press the FORCE SERVICE button Observe the pressure while the system is pumping down The pressure should decrease If it does not this indicates a defective valve Expansion Valve Motor Winding Resistance If the expansion valve is suspected of not functioning properly t...

Page 27: ... pressure regulating valves oil pressure safety controls and all other safety controls and adjust them if necessary d On freezers only check the low pressure switch setting It must be set to 0 PSIG cut out 10 PSIG cut in to allow start and operation especially in cold ambients e Liquid line should always be insulated f Wiring diagrams instruction bulletins etc attached to the condensing units shou...

Page 28: ...ck crankcase heater operation if used g Install instruction card and control system diagram for use of building manager or owner System Balancing IMPORTANT In order to obtain the maximum capacity from a system and to ensure trouble free operation it is essential to balance each and every system The critical value to be checked here is suction superheat at the compressor 1 Measure the suction press...

Page 29: ...ng potentially costly repairs of a premature failure due to equipment neglect The following is Heatcraft s minimum recommendations for regularly scheduled preventive maintenance of your 7 Eleven refrigeration system Qualified and licensed refrigeration companies only should perform all preventive and corrective maintenance on refrigeration equipment While we cannot guarantee that close adherence t...

Page 30: ... not rotate smoothly or makes excessive noise 2 Check all fan blade set screws and tighten as required 3 Check all fan blades for signs of cracks wear or stress Pay close attention to the hub and spider Replace blades as required 4 Verify that all motors are mounted securely Inspect electrical wiring and components 1 Verify that all electrical and ground connections are secure tighten as required ...

Page 31: ...that are worn cracked or bent 4 Verify that all fan motors are securely fastened Inspect electrical wiring and components 1 Visually inspect all wiring for wear kinks bare areas and discoloration Replace any wiring found to be damaged 2 Verify that all electrical and ground connections are secure tighten if necessary 3 Check operation calibration of all fan cycle and defrost controls when used 4 L...

Page 32: ... Check Sensor and Board Connection Replace as needed E2 Defrost Sensor Check Sensor and Board Connection Replace as needed E3 Suction Sensor Check Sensor and Board Connection Replace as needed E4 Suction Transducer Check Transducer and Board Connection Replace as needed E5 Outdoor Sensor Check Sensor wiring and Board Connection Replace or remove 1 Check Refrigerant Type 1 Compare board setpoint an...

Page 33: ... line sizing Correct line sizing Check for liquid line restrictions Repair line or remove restrictions Check operation of HPS Replace HPS if necessary E7 Compressor 4 Oil Pressure Safety OPS Tripped Shutdown Check oil level in compressor Add oil to crankcase to minimum level Check oil sump screen pickup Clean or replace pickup screen Check oil pump pressure Replace compressor oil pump Check for pr...

Page 34: ...Slave1 Slave 2 Slave 3 1 COMM E9 no error no error no error 2 COMM no error E9 E9 E9 3 COMM no error no error E9 E9 4 COMM no error no error no error E9 5 COMM no error no error no error no error PROBLEM Step ACTION ITEM IF OK IF NOT OK 88888 LED display 1 Check Voltage to Evaporator Transformer 1 Check field wiring for breaks or shorts power is below 18V and 2 Check Transformer Secondary Output V...

Page 35: ...ck for iced evaporator coil 13 Defrost coil and check defrost cycle see E2 settings setpoints and defrost sensor 14 Check defrost parameters 14 Correct defrost setpoints in program frequency and termination of defrosts 15 Check superheat setpoint too high 15 Correct setpoint for more cooling surface 16 Check display values F or C 16 Correct setpoint for proper display values Placing system into SE...

Page 36: ...cription HRP Part Number Top Panel 35617803 Front Panel LH 35617903 LH Front Panel RH 35622803 RH Fan Motor 2538000 Fan Blade 2293030 Fan Guard 23104201 Fan Contactor 25A 3Ø 240 V 2259996 Fan Relay 24 V 22511401 Fan Relay 240 V 1007950 Low Pressure Switch 28913401 High Pressure Switch 28913201 Receiver 6 x 27 27304701 Receiver 6 x 12 27304702 Compr Contactor 40A 3Ø 24 V 2252440 Circuit Breaker 40A...

Page 37: ...37 Wiring Diagrams Diagram 1 ...

Page 38: ...38 Wiring Diagrams Diagram 2 ...

Page 39: ...39 Wiring Diagrams Diagram 3 ...

Page 40: ...40 Wiring Diagrams Diagram 4 ...

Page 41: ...41 Wiring Diagram Diagram 5 ...

Page 42: ... condenser fan operation for the Ice Machine circuit located with the left fan Relay is 208 240V Hoshizaki ice machines require a 115 volt relay which must be field supplied replacing the factory relay Diagram 1 Ice Machine Fan Cycle Wiring R4 Ice Machine Left Fan Bank 3 1 ...

Page 43: ... Temp 10 F Superheat 8 F No of Defrost Day 4 Defrost End Temp 65 F COOLER ICE STORAGE Refrigerant Type R22 R404A Box Setpoint Temp 35 F 28 F Superheat 8 F 8 No of Defrost Day 2 4 Defrost End Temp 50 F 50 F SYSTEM CHECKS Check Compressor Superheat for the COOLER Should be between 20 F 30 F YES NO Check Compressor Superheat for the FREEZER Should be between 20 F 30 F YES NO Force unit into a Defrost...

Page 44: ...reezer Suction Pressure ______PSIG Ice Storage Suction Pressure ______PSIG Cooler Suction Temp ______ F Freezer Suction Temp ______ F Ice Storage Suction Temp ______ F Cooler Refrigerant Charge ______lbs Freezer Refrigerant Charge ______lbs Ice Storage Refrigerant Charge ______lbs Cooler Compressor Superheat ______ F Freezer Compressor Superheat ______ F Ice Storage Compressor Superheat ______ F C...

Page 45: ...45 Notes ...

Page 46: ...46 Notes ...

Page 47: ...47 Notes ...

Page 48: ...t com Since product improvement is a continuing effort at Heatcraft Refrigeration Products we reserve the right to make changes in specifications without notice WARNING Refrigerant can be harmful if it is inhaled Refrigerant must be used and recovered responsibly Failure to follow this warning may result in personal injury or death ...

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