Table of Contents
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INSTALLATION & OPERATING
MCCU Condensing Units
TABLE of CONTENTS
General Safety Information .................................. 2
Condensing Unit Specifications ........................... 2
Evaporator Specifications .................................... 3
Evaporator Placement .......................................... 4
Condensing Unit Placement ................................. 5
Condensing Unit Rigging ..................................... 6
Refrigeration Piping and Line Sizing ................... 7
Refrigeration Piping ........................................ 8-10
Leak Detection and Evacuation ......................... 11
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
INSTRUCTIONS
(770) 465-5600 • Fax: (770) 465-5990
www.heatcraftrpd.com • e-mail: hrpd.feedback@heatcraft.com
H-IM-711C5
Part #25006501
September, 2002
(Replaces H-IM-711C4, 5/02)
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Table of Contents
Related Manuals for Heatcraft Refrigeration Products II
Summary of Contents for Heatcraft Refrigeration Products II
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Page 1: Table Of Contents
Refrigeration Piping and Line Sizing ... 7 Refrigeration Piping ... 8-10 Leak Detection and Evacuation ... 11 Field Wiring ... 12-13 Beacon II Controller ... 14-26 Refrigeration Charging ... 27 Operational Check-Out ... 28 System Balancing ... 28 Preventive Maintenance ... 29-31 Diagnostics ... -
Page 2: General Safety Information
General Safety Information General Safety Information 1. Installation and maintenance to be performed only by certified personnel who are familiar with this type of equipment. 2. Make sure that all field wiring conforms to the requirements of the equipment and all applicable national and local codes. -
Page 3: Evaporator Specifications
LET047BHB2N6K Ice Storage ADT130BHB2N2K Cooler ADT130BHB2N2K Cooler ADT156BHB2N2K Cooler ADT156BHB2N2K Cooler ADT208BHB2N2K Cooler ADT208BHB2N2K Cooler Figure 2. Figure 3. © Heatcraft Refrigeration Products., 2002. Dimensions (in.) BTUH 20,800 77.50 65.25 20,800 77.50 65.25 5,300 46.50 49.13 16.50 4,700 29.50 17.25 13,000 45.50... -
Page 4: Evaporator Placement
Evaporator Placement Typical Layouts for Illustration (refer to build plans for actual room layout and equipment location) The ADT/LET units are draw through units. For best operation, they should be located away from entry doors and at least 18” from the wall with the fans blowing into the room. Make sure the units are flush mounted to the ceiling to insure proper drainage for defrost water. -
Page 5: Condensing Unit Placement
Condensing Unit Placement Space and Location Requirements The most important consideration which must be taken into account when deciding upon the location of air- cooled equipment is the provision for a supply of ambient air to the condenser, and removal of heated air from the condensing unit or remote condenser area. -
Page 6: Condensing Unit Rigging
Condensing Unit Rigging 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. -
Page 7: Refrigeration Piping And Line Sizing
Flux only the male portion of the connection, never the female. After brazing, remove excess flux. (i) Remove temperature 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. -
Page 8: Refrigeration Piping
Refrigeration Piping Suction Lines NOTE: If the suction line must rise to the point higher than the suction connection on the evaporator, a suction line trap at the outlet of the evaporator must be provided. Horizontal suction lines should slope away from the evaporator toward the compressor at the rate of 1/4’ per 10 feet for good oil return. - Page 9 Refrigeration Piping Figure 9. Example of Pipe Support 1. Normally, any straight run of tubing must be supported in at least two locations near each end of the run. Long runs require additional supports. The refrigerant lines should be supported and fastened properly. As a guide, 3/8 to 7/8 should be supported every 5 feet, 1-1/8 and 1-3/8 every 7 feet;...
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Page 10: Refrigeration Piping
Refrigeration Piping Figure 11. Piping Connection Layout (MCCU)****** 2 sets hard piped from MCCU to sandwich cases 2 sets of pre-charged line sets from IMI Cornelius 2 extra circuits for stores that install additional. 2 or 4 barrel machines 4” 4”... -
Page 11: Leak Detection And Evacuation
Leak Detection And Evacuation Leak Testing After all lines are connected, the entire system must be leak tested. The complete system should be pressurized to not more than 150 PSIG with refrigerant and dry nitrogen. The use of an electronic type of leak detector is highly recommended because of its greater sensitivity to small leaks. -
Page 12: Field Wiring
WARNING: All wiring must be done in accordance with applicable codes and local ordinances. The field wiring should enter the areas as provided on the unit. The wiring diagram for each unit is located on the inside of the electrical panel door. All field wiring should be done in a professional manner and in accordance with all governing codes. - Page 13 Consult the wiring diagram in the unit cooler and in the condensing unit for proper connections. Wire type should be of copper conductor only and of the proper size to handle the connected load. The unit must be grounded. Figure 13. Beacon II Board Heater Relay...
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Page 14: Beacon Ii Controller
• Use a minimum 18 gauge wire for all low voltage connections. • The Beacon II board get its 24 VAC power supply from a transformer mounted in the electrical end of each evaporator. On 208-240 volt systems the multi-tap transformer is shipped from our factory wired for 240 volts. -
Page 15: Power Supply
• Low voltage – 24V Class II control circuit. A total of five low voltage 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. - Page 16 During this time, the compressor will run for a minimum 2 minutes “hold-on” cycle. The 4 minute “hold-off” can be bypassed and the system started immediately by pressing the “Reset” button on the Beacon II board. Figure 14. Operating Mode Display oFF – Off Coo –...
- Page 17 Beacon II Controller Programming And Reviewing Settings/Changes The Program Review button is used to program, review and change all program settings for the system. Press “PROGRAM REVIEW” button. The Setpoint item will appear on the LED. After a few seconds delay the Setpoint value will display.
- Page 18 Beacon II Controller Programming And Reviewing Settings/Changes (continued) Use the “PROGRAM REVIEW” button to select these items: PROGRAM REVIEW • Defrost Type – “A-E” – Selection is made for air defrost or electric defrost coil. This will automatically set the system factory defaults for air defrost and electric defrost. (See default settings). Please note that the...
- Page 19 °F/°C – “F-C” – Select units to display temperature. Fahrenheit or Celsius. • Default: Fahrenheit. • When °C is selected a red dot will appear in the right bottom corner of the LED display of the Beacon II board. Use the “MONITOR” button to review these items: – Superheat (°F) –...
- Page 20 With the system in the OFF mode, pressing and holding this button will start the “TEST” mode. In the “TEST” mode it will cycle through each output. STATUS INDICATOR LED A red, 3-digit, alphanumeric LED on the Beacon II board indicates status, alarms and error codes. Status •...
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Page 21: Low Ambient Operation
Beacon II Controller STATUS INDICATOR LED (continued) Status • ERRORS • OTHERS Low Ambient Operation All units are shipped standard with head master valves. (Scroll compressor units have a 100 PSI head master valve and all other systems have a 180 PSI head master valve.) Condensing units with multiple condenser fans will have one or more fans cycle on Pressure Fan Cycling switch. -
Page 22: Service Mode
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 keeps in memory the number of defrosts scheduled and how much time has elapsed between defrosts. If a power failure occurs, when power is restored Beacon II will remember how many defrosts are scheduled and it will remember how much time was left until the next defrost. - Page 23 Alarms Beacon II provides a set of dry contacts for use in signaling an alarm. These contacts can be connected to a light, a buzzer, a bell, etc., which will be activated when an alarm condition occurs. When the Beacon II is energized, the alarm contacts are OPENED.
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Page 24: Power Failures
“COM” on the Beacon II board. Closing this switch will cause the system to pumpdown and shut off. Air defrost fan motors must be wired through the fan relay on the Beacon II board for this to be effective on air defrost systems. -
Page 25: System Defaults
Beacon II Controller System Defaults Table 5. System Defaults Parameters Refrigerant Box Temperature Superheat Slave Evaporator No. of Defrosts Per Day Defrost Fail-Safe Time Defrost End Temperature Defrost Delay Start Time Alarm High Temperature Alarm Low Temperature Alarm Time Temperature Units Figure 15. -
Page 26: Beacon Ii Controller
After the system pumps-down and trip on the LPS, turn off the power to the Beacon II board, then turn the power back on. This will cause the Expansion valve to close. -
Page 27: Refrigeration Charging
Refrigeration Charging Refrigeration Charging 1. Install a liquid line drier in the refrigerant supply line between the service gauge and the liquid service port of the receiver. This extra drier will insure that all refrigerant supplied to the system is clean and dry. 2. -
Page 28: Operational Checkout
Operational Checkout After the system has been charged and has operated for at least 2 hours at normal operating conditions without any indication of malfunction, it should be allowed to operate overnight on automatic controls. Then a thorough re-check of the entire system operation should be made as follows: (a) Check compressor discharge and suction pressures. -
Page 29: Preventive Maintenance
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. - Page 30 Preventive Maintenance...
- Page 31 Preventive Maintenance...
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Page 32: Diagnostics
Beacon II Troubleshooting Guide PROBLEM Step ACTION ITEM Check Primary Power Supply Disconnect Check Voltage to Evaporator Transformer LED is not lit. Check Transformer Secondary Output Volts Check Voltage at Control Board (24V and C) Replace Control Board Check Compressor internal overloads... - Page 33 Beacon II Troubleshooting Guide (continued) PROBLEM Step ACTION ITEM Check wiring connection to the board Low Pressure Safety (LPS) Tripped: • Check for correct refrigerant type • Check refrigerant charge • Check LPS setting • Check LPS wiring • Check EEV operation (stuck?) •...
- Page 34 (power is below 18V and Check Transformer Secondary Output Volts appears at initial power) Check Voltage at Control Board (24 and C) Check Voltage at SMART Controller II Check for low voltage LED displays dLy then oFF with no Check for short in field wiring from “comp” on...
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Page 35: Diagnostics
(with SMART Controller II) 1. Must terminate using same switch 2. Open connection between “Ser” and “C” 3. From program menu of Smart Controller II, Change SERVICE setpoint to “Off” [Note: If multiple switches were placed in Service Mode, all must be “open” to terminate the mode.) -
Page 36: Parts
Table 6. Beacon II Parts List PART DESCRIPTION Beacon II Control Board *Temperature Sensor Kit – Blue Leads Transformer: Pilot Relay Contactor for Compressor 40 amp with 24 volt Coil Terminal Block – Condensing Unit Low Pressure Switch Time Delay Relay... -
Page 37: Wiring Diagrams
Wiring Diagrams Diagram 1. - Page 38 Wiring Diagrams Diagram 2.
- Page 39 Wiring Diagrams Diagram 3.
- Page 40 Wiring Diagrams Diagram 4.
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Page 41: Wiring Diagram
Wiring Diagram Diagram 5. - Page 42 Wiring Diagram Diagram 1. Ice Machine Fan Cycle Wiring Fan Cycling Interlocking Connections Relay 4 (R4) is for condenser fan operation for the Ice Machine circuit located with the left fan. Relay is Ice Machine ** 208-240V. Hoshizaki ice machines require a 115 volt relay which must be field supplied replacing the factory relay.
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Page 43: Start-Up Checklist
• Is heat tape plugged in and heating the drain line? INSULATION • Are Liquid lines fully insulated? • Are Suction lines fully insulated? Start-up Checklist SETTINGS • Check Beacon II board settings for the following: FREEZER Refrigerant Type Box Setpoint Temp. Superheat No. of Defrost/Day Defrost End Temp. -
Page 44: Start-Up Checklist
Start-up Checklist RECORD OUTDOOR TEMPERATURE SYSTEM VOLTAGE Cooler Compressor Amps Freezer Compressor Amps Ice Storage Compressor Amps Cooler Discharge Pressure Freezer Discharge Pressure Ice Storage Discharge Pressure Cooler Suction Pressure Freezer Suction Pressure Ice Storage Suction Pressure Cooler Suction Temp. Freezer Suction Temp. - Page 45 Notes...
- Page 46 Notes...
- Page 47 Notes...
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Page 48: W. Park Place Blvd. • Stone Mountain, Georgia
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. Since product improvement is a continuing effort at Heatcraft Refrigeration Products, we reserve the right to make changes in specifications without notice.