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Heatcraft Refrigeration Products H-IM-79D User's Manual
Contents
1. 24 VOLT CONNECTION WIRING BEACON Il CONDENSING UNIT WITH ONE EVAPORATOR TB f i fe 5 M 7 Fi 3 18 GA FIELD WIRING _ NS 10 Tesi l E Um D HEATCRAFT PART NO 29661301 REV B 24 VOLT CONNECTION WIRING BEACON Il MASTER WITH ONE SLAVE CONNECTION CONDENSING UNIT WITH TWO EVAPORATORS HEATCRAFT PART 29661401 REV B 28 24 VOLT CONNECTION WIRING 1 MASTER WITH THREE SLAVE CONNECTION CONDENSING UNIT WITH FOUR EVAPORATORS HEATCRAFT PART 29861501 REV ONMM V 10190962 ATNO SYOLONGNOS W3ddOO BSN ONIHIM HOLYYOdYAI LSOY430 SUINN DEZUORIADEZ G0Z 1 tZ LINN ONISNIONOI HOLYYOdYAI TvOIdAL 30 lt 5 S Worldwide Refrigeration 10678966 Hed ONIHIM LINN IWALOV LINN NO LINSNOO SINVHOVIG HOLVEHOdVWAA 1VOldAL 5 H LON SLIHM N33W85 3f8 NANOHB 40v718 G39 MOTI3A SLIHM N33d9 3ng NMOUE 038 MOTI3A 3009 2 1 002 2 09 41 062 802 SHOLONGNOO YAddOO FSN O N 3009 ZHOS HdV AO2Z ZHOS Hdb NOLL SNY4 9 OL t IVOIdAL 01314 8 ZH09 Hd ZHO9 H
2. 13 22 Refrigerant Box Temperature Superheat Slave Evaporator No of Defrost per Day Defrost Fail safe time Defrost End Temperature Defrost Delay Start Time Alarm High Temperature Alarm Low Temperature Alarm Time Temperature Units Control Sensors amp Piping c Controller Room Temp Defrost Y Spare Sensor Temp Sensor B Sensor others Suction Temp Electric Sensor __ Expansion Valve e Sight Suction Press Glass Filter Transducer 24 Drier A f Suction Filter Outdoor Condenser Temp Sensor Compressor Receiver 22 AEATCRAFT Parts List Worldwide Refrigeration Table 3 Parts List HRPD PART PART DESCRIPTION NUMBER Beacon Il Control Board 28910101 Temperature Sensor kit White Leads 89904902 Transformers 120 24 volt 40 VA 22529601 240 24 volt 40 VA 22529602 460 24 volt 40 VA 22529603 575 24 volt 40 VA 22529701 Pilot Relay 22511401 Contactor for Compressor 40 amp with 24 volt Coil 2252440 Terminal Block Condensing Unit 2251266 Low Pressure Switch Time Delay Relay 22536801 Electric Expansion Valve ESB1 3 8 3 8 Conn 29320003 ESB 4 3 8 x 3 8 Conn 29320004 ESB 10 3 8 x 3 8 Conn 29320007 ESB 10 1 2 x 1 2 Conn 29320008 ESB 15 7 8 x 1 3 8 Conn 29320013 ESB 20 7 8 x 1 3 8 Conn 29320014 Expansion Valve Molded Connector Bipolar val
3. Beacon l REFRIGERATION SYSTEM H IM 79D February 2004 Part Number 25001401 Replaces H IM 79C 12 03 Installation amp Operation Manual Beacon Il Board layout nersilerni isaac EAREN Rea kat 3 Installation AEE E E 4 Brazing Power Supply VIO slo lalla 5 Multiple Evaporator 6 Box Temperature control setting Leak Testing Refrigerant aa 7 Start ade ail ate 8 11 Operating Mode Display ii 11 Programming and reviewing settings and changes 12 13 Program review button Select button Enter button 51 e 14 Monitor button Force Defrost button Force Service button Reset Time button Clear Test button Locking Beacon 15 Status Indicator E ED 5 25564595 12 55225015 2885 15 16 Low Ambient Operation i 16 RE 16 17 Defrost s icio eoe ied enden ce one A coe ne Ea 17 18 Alarms israele td acte 18 Error Indicator Evaporator fans shutdown by operators 2 2 eene nenne nens 19 Checking Operation of Expansion valve 20 21 Power Failures Service Mode Spare Sensor Terminals Checking 5015015 euro ten repete te Eee Eten in
4. Replace faulty OPS Replace faulty module Reduce superheat TXV adjust etc Correct overheating problem Consider crankcase pressure regulator or other measures Correct power phase problem Correct power supply problems Replace faulty PLM Replace auxiliary relay Replace faulty demand cooling device Replace board if relay is faulty IEATCRAFT Beacon Il Troubleshooting Guide continued Step ACTION ITEM PROBLEM E9 Wulti out to Multi in Communication Wiring only shows after initial successful connection E9 continued Communication Error Occurrence Break in the designated lines will cause errors as follows Line D 1 2 Diagnostics Check for 24 volts power to the board Check for crossed communication wiring multi out not wired to multi in terminals Check for broken communication wiring Master in out Slave 1 out IF OK Go to next step Slave 2 in out IF NOT OK 1 If no voltage see LED is not lit above for low voltage see 88888 LED display 2 Correct wiring from Master unit Multi out to Multi in of Slave unit etc to all Slaves and return to Master See wiring diagrams 3 Correct wiring between first Slave with error to previous board in the sequence Slave 3 out With Beacon Il Smart Controller Line 086080 PROBLEM 8
5. 0 5 Hours to 23 5 Hours Set Alarm High temperature 40 F to 90 F ALL Set Alarm Low temperature 40 F to 90 F ALt SetAlarm time 2 to 120 minutes F C SetFahrenheit Celsius temperature units F C 12 Programming amp Reviewing PROGRAMMING AND REVIEWING SETTINGS CHANGES cont d Use the PROGRAM REVIEW button to select these items ni 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 refrigerant type oe au for air defrost is R 22 and for electric defrost it is R404A All units are shipped with factory defaults settings Refrigerant Type Selection for type of refrigerant R 22 R 404A or 507 Default Air defrost is H Z2 and for electric defrost it is H 4044 Box Temperature bot Select box temperature setpoint Selection range is 30 F to 70 F Defaults Electric defrost 10 F and air aefrost 35 F Superheat SUP Evaporator superheat is controlled by the board on each evaporator Each board measure the evaporator saturation suction temperature and the suction pressure to determine the superheat The superheat value at the evaporator can be changed to ensure 20 F to 30 F superheat at the Compressor Default 8 F Evaporator Board Slave SLA On m
6. F for 2 minutes Step ACTION ITEM PERDI IF OK Check Primary Power Supply Disconnect Check Voltage to Evaporator Transformer Go to Check Transformer Secondary Output Volts next step Check Voltage at Control Board 24V and C Replace Control Board Check Compressor internal overloads Check Control Power to Condensing Unit 24 Volts across COMP and C at board Go to Check Compressor Contactor Coil Voltage next step Check Compressor Contactor pulled in Check Sensor and Board Connection Check Sensor and Board Connection Check Sensor and Board Connection Check Transducer and Board Connection Check Sensor wiring and Board Connection Check Refrigerant Type Check coil for ice Check Control Board step position from board LED Check Electric Expansion Valve Closure Go to next step Compressor Not Operating Check Suction Temperature Sensor Check Suction Pressure Transducer IF NOT OK 1 Check fuses and circuit breakers 2 Check field wiring for breaks 3 Replace if necessary 4 Check factory wiring and connections 1 Wait for reset 2 Check transformer voltage Secondary and primary and wiring of 208V power taps 3 Check internal condensing unit wiring 4 Replace as needed Replace as needed Replace as needed Replace as needed Replace as needed Replace or remove 1 Compare board setpoint and refrigerant 2 Defrost coil and check defrost cycle settings setpoints defrost sensor and
7. LIYES LINO Is heat tape wrapped along entire length of the drain line in the Freezer LIYES LINO Is heat tape plugged in and heating the drain line LIYES LINO INSULATION Are Liquid lines fully insulated OYES Suction lines fully insulated 5 SETTINGS Check Beacon Il board settings for the following FREEZER Refrigerant Type R404A Box Setpoint Temp 10 F Superheat 8 F No of Defrost Day 4 Defrost End Temp 65 F 35 COOLER Refrigerant Type R22 Box Setpoint Temp 35 F Superheat 8 F No of Defrost Day 2 Defrost End Temp 50 F SYSTEM CHECKS Check Compressor Superheat for the COOLER Should be between 20 F amp 30 F OYES ONO Check Compressor Superheat for the FREEZER Should be between 20 F amp 30 F OYES ONO Force unit into a Defrost Check heater amps Should match nameplate amps OYES ONO Check LPS Time Delay Relays Should be set at 1 minute for both the COOLER and FREEZER OYES ONO Check Low Pressure Switch on FREEZER Should be set at 0 psig Cut out 10 psig Cut in OYES ONO Did FREEZER and COOLER cycle off on LPS at Setpoint Temperature OYES ONO Is the sight glass free of bubbles OYES ONO Are the COOLER and FREEZER fans at proper speeds OYES ONO Check system for refrigerant leaks Are there any leaks on the COOLER FREEZER CONDENSING UNIT or INTERCONNECTING PIPING OYES ONO Check system piping for unusual vibration or noise Is there
8. heater amps 3 Replace board if EEV steps not at 2 4 Pumpdown system see if LPS opens or if it times out EEV is bad or LPS is set incorrectly if times out See Pumpdown 5 Check overloads and contactor 6 Compare board sensor reading against actual suction line temperature 7 Compare pressure reading against gauges HEATCRAFT Diagnostics Beacon Il Troubleshooting Guide continued PROBLEM E7 Compressor Shutdown 15 2 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 Check for icing Check for correct superheat reading Check for correct nozzle selection Check for clogged EEV inlet screen Check line sizing Check LPS time delay relay setting Check operation of LPS High Pressure Safety HPS Tripped Check for system overcharge Check for non condensables Check condenser fan motor and blade Check for dirty condenser coil Check head pressure controls Check fan cycling controls Check liquid line sizing Check for liquid line restrictions Check operation of HPS Oil Pressure Safety OPS Tripped Check oil level in compressor Check oil sump screen pickup Check oil pump pressure Check for proper piping practices Check for low superheat see 6
9. program the appropriate defrost delay start time for the next desired defrost period The defrost schedule will be correct until you have another power outage HEATCRAFT Defrost Alarms ELECTRIC DEFROST MODE When a defrost is initiated the EEV closes the compressor is allowed to pumpdown and shut off The evaporator fans are cycled off and the defrost heaters are energized On multiple evaporator systems all controllers must terminate their defrost either on temperature or fail safe time before the master controller will end the defrost cycle There is a 2 minute condensate drain down period after which the compressor is started for a refreeze period The evaporator fan stays off fan delay The refreeze period will last until the evaporator suction temperature is at 28 F or 3 minutes has elapsed After this sequence the system is back in the refrigerating mode and evaporators fans are now running AIR DEFROST MODE The sequence is the same as for electric defrost except that there are no heaters and the evaporator fans run continuously If the air defrost for motors are wired through the fan relay on the board they will remain energized during defrost mode ALARMS Beacon 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 Il is energized the alarm contacts are OPENED When an al
10. 10 PSIG cut in to allow positive start and operation especially in cold ambient This can be changed to a higher value in warmer climates On cooler units the Low Pressure switch has a fixed setting and cannot be adjusted Turn power on On MASTER evaporator DO NOT REMOVE the Room Sensor from any evaporator Use the PROGRAM REVIEW button to scroll through settings Check Refrigerant Type Factory defaults are defrost R 22 electric defrost R 404A Change to the refrigerant being used Check bot Box Temperature Factory defaults are air defrost 35 F and electric defrost 10 F Change to the desired temperature Review and change other setting if necessary procedures below on how to change settings OnSLAVE evaporators All Beacon Il boards are shipped with the factory default as a MASTER evaporator DO NOT REMOVE the Room Sensor from any evaporator Each SLAVE Evaporator must be changed to identify it as a SLAVE Use the PROGRAM REVIEW button to scroll until SLA appears then use the SELECT knob to select YES then press ENTER M 5 5 5 CU M Master Evaporator Slave Evaporator CU Condensing Unit HEATCRAFT Start Up Operation MULTIPLE SYSTEMS with MULTIPLE EVAPORATORS Requires a Smart Controller Check all wiring connections to be sure they are correct and ti
11. ONIHIM AHOLOVI N33u5 ana NMOHB 0v18 ad3u MOTA ONIHIM AHO10V3 LOcv8962 ON Hed 1 SHOLONGNODS H3ddOO SHOLONONOI 334309 ISN 5 ki E 3 N 5 HailVaiH 5n ANNOYS 1el IVNINUIL Hd ONIHIM HOLON 3SVHd H3OngasNvutL 3unssa3sd NOLLINS Nid 58155384 NOILONS dW34 NOILONS 5 1 HOSNIS dW31 NOLLONS N99 INIL 19804430 QHVOSIINOOV38 my dW31 WOOH euey pued do dij uo peje20 1 5 95 ye oyeeH HOLVHOdV 3 LINN ONIHIM YOLVHOdVAA IVOIdAL 8 4 OL 1 IVOldAL SINMOHS HOLON BILVIH NVd NIVHO E gt gt mz 2 3 2 5 FUNSSIHA NOLLONS 90155399 NOILINS ANZ NOILONS AN31 18083430 1199 NOOVad Nid Z AN34 WOOH HOSN3S dW3L NOLLONS 1804430 pued do jo dijo uo 105 5 WOOLY oul yeojeoH HOLVHOdV a 3 IlIdOHd NNICIIN 32 HEATCRAFT Worldwide Refrigeration 208 230V 60hz 3 CONDENSING UNITS USE COPPER CONDUCTORS ONLY FACTORY WIRING FIELD WIRING Part No 29684001 ADJUSTABLE FCP SET 260 PSIG CUT IN 50 PSIG DIFFERENTIAL CUT OUT AF ADJUSTABLE LPS SET T
12. Start Up Operation SINGLE SYSTEM with 1 EVAPORATOR Check all wiring connections to be sure they are correct and tight On condensing unit Check the setting of Time Delay relay It should be set at 1 minute the second marker Check the Low Pressure switch setting on freezer units It must be set to 0 PSIG cutout 10 PSIG cut in to allow positive start and operation especially in cold ambients This can be changed to a higher value in warmer climates On cooler units the Low Pressure switch has a fixed setting and cannot be adjusted Turn power on On the evaporator Use the PROGRAM REVIEW button to scroll through settings Check Refrigerant Type Factory defaults are Air Defrost R 22 Electric Defrost R 404A Change to the refrigerant being used Check bot Box Temperature Factory defaults are air defrost 35 F and electric defrost 10 F Change to the desired temperature Review and change other setting if necessary See procedures below on how to change settings CU M M Master Evaporator CU Condensing unit HEATCRAFT Start Up Operation SINGLE SYSTEM with MULTIPLE EVAPORATORS Check all wiring connections to be sure they are correct and tight On Condensing unit Check the setting of Time Delay relay It should be set at 1 minute the second marker Check the Low Pressure switch setting on freezer units It must be set to 0 PSIG cutout
13. close Open the valve on the liquid line at the condensing unit The suction pressure reading on the gauge set should not increase If the suction pressure increases then the expansion valve is leaking and should be changed The Expansion valve position can be monitored from the LED display pressing the MONITOR button and scrolling to ESP This will indicate the number of steps the valve is open This can also be checked by using the EXV test pins on the board This is indicated by a 0 to 5 Volts DC signal At 0 Volt the valve is closed and at 5 Volts the valve is fully open At values between 0 and 5 Volt the valve will be opened proportionately Use the MONITOR button to display SCP Evaporator Suction Pressure Record the pressure displayed Start the system and observe the pressure displayed If the pressure does not increase the expansion valve could be defective If the system is running use the MONITOR button to display 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 the motor windings resistance should be measured This is a bipolar motor with two windings Measure the resistance at
14. minutes the second marker d Check high and low pressure controls pressure regulating valves oil pressure safety controls and all other safety controls and adjust them if necessary 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 f Liquid line should always be insulated g Wiring diagrams instruction bulletins etc attached to the condensing units should be read and filed for future reference h All fan motors on air cooled condensers evaporators etc should be checked for proper rotation Fan motor mounts should be carefully checked for tightness and proper alignment i Observe system pressures during charging and initial operation Do not add oil while the system is short of refrigerant unless oil level is dangerously low j Continue charging until system has sufficient refrigerant for proper operation Do not overcharge Remember that bubbles in a sight glass may be caused by a restriction as well as a shortage of refrigerant k Do not leave unit unattended until the system has reached normal operating conditions and the oil charge has been properly adjusted to maintain the oil level at the center of the sight glass At initial start up the system may cycle off at 2 minutes and display a low superheat error then restart itself This cycle may be repeated a few times Do not shut the system off L
15. 88 LED display power is below 18V and appears at initial power LED displays dLy then oFF with no displayed errors 26 0 3 Master Slave1 Slave 2 Slave 3 E9 E9 E9 E9 E9 no error E9 E9 E9 no error no error E9 E9 5 is no error no error no error rt oll Master Slave 1 Slave 2 Slave 3 in out in out in out in out in o 2 8 SMART Master Slave1 Slave 2 Slave 3 COMM E9 no error no error no error COMM no error 9 9 9 COMM no error no error E9 E9 COMM no error no error no error E9 COMM no error no error no error no error Step ACTION ITEM _IF NOT OK 1 Check Voltage to Evaporator Transformer 1 Check field wiring for breaks or shorts 2 Check Transformer Secondary Output Volts Go to 2 Replace if necessary 3 Check Voltage at Control Board 24 and C next step 3 Check factory wiring and connections 4 Check Voltage at Beacon II Smart Controller 4 Check field wiring from board 1 Check for low voltage 1 Check all steps for 888 LED display Go to Voltage could drop off too fast to show 2 Check for short in field wiring from comp on next step 2 Check internal factory wiring to board to condensing unit terminal connection compressor contactor 3 Replace defective contactor holding coil HEATCRAFT Diagnostics Beacon Il Troubleshooting Guide continued PROBLEM Step ACTION ITEM IF OK 1 Check system operation 16 it r
16. AFT Start Up Operation INITIAL POWER ON At the initial application of power to the system the compressor and the evaporator fans will be in a 4 minute hold off cycle and will not start immediately When there is a call for COOLING the expansion valve EEV opens then the compressor is started The compressor will then run for a minimum of 2 minutes in the hold on cycle This means that the compressor will run for a minimum of 2 minutes before shutting off even if the box temperature is met The LED alternately displays BOX 7EMPERATURE and MODE of operation On a call for cooling dLY will show while the expansion valve is opening After the compressor starts the LED will alternately display BOX 7EMPERATURE and Coo On multiple evaporator systems the MASTER evaporator will display BOX TEMPERATURE and Coo The SLAVE evaporators will display Coo only 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 least 4 minutes the EEV will open to its last position then the compressor will start The valve is then adjusted as necessary to obtain the setpoint superheat setting During this time the compressor will run for a
17. Check operation of auxiliary relay R6 Check OPS sensor Check operation of OPS Compressor Module Tripped when supplied Check module Check superheat at compressor inlet Check compressor for overheating Check suction pressure too low Phase Loss Monitor PLM Tripped Check presence of all phase legs Check power supply Check operation of PLM Demand Cooling when supplied Check auxiliary relay Check demand cooling device Check compressor relay on board 25 IF OK Go to next step IF NOT OK Correct field wiring to the board Change setpoint to match refrigerant Add more refrigerant to proper charge Correct LPS setting Correct LSP wiring Clean or replace EEV Defrost coil see 6 step 2 Check replace sensor or transducer Replace distributor nozzle Replace EEV Correct line sizing Reset to 1 minute Replace Low Pressure Safety Switch Reclaim recover excess charge Remove all non condensables Repair or replace motor and or blade Clean condenser coil Adjust or replace faulty controls Adjust or replace faulty controls Correct line sizing Repair line or remove restrictions Replace HPS if necessary Add oil to crankcase to minimum level Clean or replace pickup screen Replace compressor oil pump Correct piping to minimize oil logging Correct per steps in 6 Replace auxiliary relay Replace faulty OPS sensor
18. IARY CONT ACTOR HPS HIGH PRESSURE SWITCH CC COMPRESSOR CONTACTOR LIS LIQUID INJECTION SOLENOID HEATER 8 1000 LINE SOLENOID CURRENT RELAY LPS LOW PRESSURE SWITCH CSR CURRENT SENSING RELAY OFS OIL FAILURE SWITCH DFT DEFROST TIMER PUMP DOWN SWITCH 5 TGA Fr DHC DEFROST HEATER CONTACTOR PLM PHASE LOSS MONITOR 1 DICA DLT DISCHARGE LINE THERM RC RUN CAPACITOR gt DT DISCHARGE THERMISTOR REFRIGERATION PRODUCTS DIVISION EFC EVAP FAN CONTACTOR gt CYCLING PRESSURE RT ROOM THERMOSTAT Model SC START CAPACITOR CYCLING TEMPERATURE M it Serial FDS FUSED DISCONNECT SWITCH A a Unit Serial FM MOTOR TDR TIME DELAY RELAY FSC FAN SPEED CONTROL TS TERMINAL STRIP Customer GND GROUND WN WIRE NUT NOTE THESE ARE TYPICAL CONDENSING UNIT WIRING DIAGRAMS CONSULT WIRING DIAGRAM SHIPPED ON UNIT FOR ACTUAL UNIT WIRING 33 Preventive Maintenance EVAPORATORS All evaporator units should be checked once a month or more often for proper defrosting because the amount and pattern of frosting can vary greatly It is dependent on the coil temperature the temperature of the room the type of product being stored how often new product is brought into the room and the percentage of time the door to the room is open It may be necessary to periodically c
19. O 10 PSIG CUTAN 10 PSIG DIFFERENTIAL CUT OUT TIME DELAY RELAY SET AT 1 MINUTE 2ND DASH MARKING COIL THE TEMP SENSOR WIRES AND ATTACH TO BOTTOM OF ELECTRICAL PANEL WITH A WIRE TIE LEGEND RT THERMOSTAT INS INJECTION SOLENOID COMPRESSOR CONTACTOR LIS LIQUID INJECTION SOLENOID CCH CRANKCASE HEATER LLS LIQUID LINE SOLENOID FAN CONTACTOR LPS LOW PRESSURE SWITCH CSR CURRENT SENSING RELAY OCP OVER CURRENT PROTECTION ET DFT DEFROST TIMER OFS OIL FAILURE SWITCH E A ER A DT DISCHARGE THERMISTOR PDS PUMP DOWN SWITCH FRIGERATION PRODUCTS DI EFC EVAP FAN CONTACTOR RI ELAY REFRIGERATION PRODUCTS DIVISION EHC EVAP HEATER CONTACTOR RH RECEIVER HEATER Model THERMOSTAT FCP FAN CYCLING PRESSURE TB TERMINAL BOARD E FDS FUSED DISCONNECT SWITCH TOR TIME DELAY RELAY Unit Serial TS TERMINAL STRIP WIRE NUT Customer 208 230V 60hz 30 CONDENSING UNITS USE COPPER CONDUCTORS ONLY FACTORY WIRING FIELD WIRING 4F ADJUSTABLE FCP SET 260 PSIG CUT IN 50 PSIG DIFFERENTIAL CUT OUT AF ADJUSTABLE LPS SET TO 10 PSIG CUT IN 10 PSIG DIFFERENTIAL CUT OUT TIME DELAY RELAY SET AT 1 MINUTE 2ND DASH MARKING COIL THE TEMP SENSOR WIRES AND ATTACH BOTTOM OF ELECTRICAL PANEL WITH A WIRE TIE SERVICE e COMPRESSOR RED R6 DLT LEGEND RED HPS CTA AUXIL
20. Unlock the board settings 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 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 Pumpdown At the end of each cooling cycle when the box temperature is met the Beacon system will pump down and shut off the compressor To pumpdown the EEV closes and the compressor runs until one of the following occurs the Low Pressure Switch opens e the suction pressure at the evaporator is 4 psig a total of two minutes has elapsed When any of these three conditions occurs the compressor will turn off and not restart until there is a call for cooling or a periodic pumpdown Periodic pumpdown While in the OFF cycle if there isn t a call for cooling Box setpoint temperature is met but the evaporator suction pressure has risen to 10 psig e the low pressure switch has closed The system will initiate pumpdown This periodic pumpdown will occur at 4 minute intervals when these two conditions are met Pumpdown Defrost Service Mode A single pole single throw switch SPST is s
21. any unusual vibration or noise on the COOLER FREEZER CONDENSING UNIT or INTERCONNECTING PIPING OYES ONO Start the FREEZER only Does the compressor start and evaporator fans run for this FREEZER OYES ONO HEATCRAFT Service Record Worldwide Refrigeration RECORD OUTDOOR TEMPERATURE F SYSTEM VOLTAGE __Volts _ Hz Cooler Compressor Amps L1 i 2 Li L3 Cooler Discharge Pressure _ PSIG Freezer Discharge Pressure PsSlG Cooler Suction Pressure _ PSIG Freezer Suction Pressure _ PSIG Cooler Suction Temp ea Freezer Suction Temp E Cooler Refrigerant Charge _ Ibs Freezer Refrigerant Charge lbs Cooler Compressor Superheat Freezer Superheat ___ Cooler Evaporator Superheat Freezer Evaporator Superheat Cooler Discharge Temp Freezer Discharge Temp TM Beacon REFRIGERATION SYSTEM Since product improvement is a continuing effort we reserve the right to make changes in specifications without notice 2175 West Park Place Blvd Stone Mountain GA 30087 Hi 770 465 5600 Fax 770 465 5990 www heatcraftrpd com HEATCRAFT
22. arm condition is detected the contacts are CLOSED Conditions under which the alarm contacts will close are High Box Temperature LED Display A 1 Room temperature has exceeded the Alarm High value for the Alarm time ALt programmed Low Box Temperature LED Display A 2 Room temperature has dropped below the Alarm Low ALL value for the Alarm time ALt programmed System Start up failure LED Display A 3 Compressor pumps down and tries to restart after 4 minutes After 4 unsuccessful attempts to restart the alarm code 3 is displayed System continues trying to restart e Input Fault LED Display A 4 Box Temp Suction Temp Pressure Transducer open or not installed e Power failure Loss of power to the Evaporator ALARM CODES A1 High Box Temp A2 Low temp System Start up failure Compressor pumps down and tries to restart after 4 minutes A4 Input Fault Box Temp Suction Temp Pressure Transducer open or not installed CLEARING ALARMS Alarms A1 High Box Temp and 2 Low Box Temp will clear automatically if the Box Temp decreases or increases to below or above the Alarm setpoint 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 ERROR INDICATOR LED At initial power up each Beacon board checks for system errors The system erro
23. art in the cooling mode after the four minute hold off period SPARE SENSOR TERMINALS Beacon ll provides a set of input 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 1 on page 22 If a product temperature simulator is used it must meet the resistance temperature specification listed in TABLE 1 The temperature range for this input is 30 F to 140 F Sensors on the Beacon system as supplied will not simulate product temperature This input can be monitored on the LED display by using the MONITOR button and scrolling to SPt The values displayed will be the temperature of the spare sensor CHECKING SENSORS DO NOT REMOVE SENSORS FROM EVAPORATORS FOR CHECKING Use the monitor button to display the value the sensors are reading on the LED suction temp SCt defrost temp dFt or room temp Compare this value to the measured value with a thermometer at each of these points If they do not match change the sensor OR The sensors can be checked for their proper operation by placing it in a cup of ice water Stir the ice water and measure the resistance of the sensor At 32 F the resistance should be 32 650 ohms If it is higher or lower by 5 000 ohms approximately the sensor should be replaced 21 Temperature F Ohms 32 23 14 5 4
24. b tte Ber 21 Sensor resistance temperature table System Defaults ela e e alla 22 Parts List Operational limits 2 Eom 23 Expansion Valve Capacity Bites me MD a 24 27 WRG SAITAMA OEE E EEG ESS aa 28 33 Preventive 34 Service Record a iii 35 36 _ gt O im O aa O Q CO BEACON Il BOARD Heater Relay Fan Relay LED Display Expansion Valve Connection 6775 Selection Buttons Room Sensor 24V Terminal he Suction Pressure 2004 Heatcraft Refrigeration Products LLC Installation Installation Tips Use a minimum 18 gauge wire for all low voltage connections e The Beacon board gets 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 If your supply voltage is 208 volt you must change to the 208 volt tap on the transformer Note On multiple evaporators since a transformer is in each evaporator the voltage tap must be set on each evaporator Refer to wiring schematic shipped on units for unit wiring Schematics in this Installation amp Operation Manual are typical wiring schematics only Program ALL slave evaporators as SLAVES Evapo
25. boards are shipped with the factory default as a MASTER evaporator Place all boards in the Service mode while you program the setpoints to avoid errors and alarms which may cause troubles at startup VERY IMPORTANT This must be done for each slave board Up to 4 evaporators be connected as master slave configuration DO remove the room sensor from any of the Beacon Il boards This also applies when connected to the optional Smart Controller CU M Master Evaporator Slave Evaporator CU Condensing Unit Each Beacon Il board power is supplied by a transformer in the evaporator on which it is mounted Do not run any 24 VAC wires between Beacon Il boards on the evaporators Box Temp Control Settings BOX TEMPERATURE CONTROL SETTINGS There is an on board room thermostat on the Beacon Il board which can be adjusted to the desired room temperature The temperature differential is 2 F Temperature Differential When a system is in the cooling mode and the box setpoint is 35 F the system will continue to cool until the box temperature gets to 34 F At this point the compressor will pumpdown and shut off The system will restart cooling when the box temperature has risen to 36 F It is important to note that Beacon has a minimum 2 minute ON time a minimum 4 minute OFF time This means that th
26. d V ASTL SI NMOHS DNIHIM HOLOW AHOLOVI SHOLONGNOO 334305 ISN DNIHIM m 01314 5 011 IWOIGAL SI NMOHS H31V3H U3MOd 91313 HAMOd I3l3 H3MOd 91313 75915373 ISICISISISISISISISISI HIS INO LINN Nid 3155359 NOLLONS INN NOLLONS 3UNSSIHA NOLLONS dW3L NOILONS HOSN3S NOLONS dW31 1904430 dW31 1804430 NUO 18084330 li INIL 15 30 AJ X310W Nid Z 7537 dW31 YRONASNVEL 3unssiud H3OD 0SNVH L JYNSSIYdA 3NI1NOLOnS 3NI1NOLLOnS HOSNIS NOILONS HOSNIS da WOO jeued doi jaued doi yo dijo uo JOSuas 9 uo 105495 LUOOH ye19j89H HOLVHOdV 3 1SOHJ3G 21919913 HOLVHOdV 3 1LSOHJH3Q ONIHIM 3lldOHd MOT WOIdAL 31 ONIHIM LINN LINN daddlHS LINSNOO SINVHOVIG ONIHIM HO LVHOdV 3 3HV 3S3H L 3LON 01314 uo uen mn ONIHIM 01414 3LIHM N233UD 3018 NMOUS
27. defrost DEFROST DELAY START TIME Example The system is first powered up at 8 00 AM and is programmed for 4 defrost per day The user would like the first 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 1 defrost will now occur at 10 00 AM and then a defrost will occur every 6 hours thereafter TIME REMAINING UNTIL NEXT DEFROST on version 1 8 boards To find out how much time is left until the next defrost is scheduled use the MONITOR button to scroll to dFS The time displayed will be how much time until the next scheduled defrost DEFROST SCHEDULE IN MEMORY Beacon Il 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 Il remembers how many defrosts are scheduled and it remembers how much time was left until the next defrost It will then defrost based on this timing So if the power failure lasted 15 minutes the defrost schedule will be off by 15 minutes RESETTING DEFROST SCHEDULE When a power interruption causes a severe lag in the defrost schedule the defrost schedule can be reset in the following manner First press the reset time button on the board to zero out the internal counters Then
28. digit alohanumeric LED on the Beacon Il board indicates status alarms and error codes LED Display e 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 Temperature Mode is displayed Slave Evaps Coo Operating Mode is displayed e Pumpdown Evaporators Pdn e DEFROST Evaporators dEF e TEST Evaporators 51 e SERVICE All Evaporators SEr ALARMS High Box Temp A 1 A2 Low Box temp System Start up failure Compressor pumps down and tries to restart after 4 minutes 4 Input Fault Box Temp Suction Temp Pressure Transducer open or not installed 15 HEATCRAFT Status Indicator LED Worldwide Refrigeration STATUS INDICATOR LED e ERRORS Room temperature sensor shorted open or not installed 2 Defrost temperature sensor shorted open or not installed Suction temperature sensor shorted open or not installed 4 Suction pressure transducer shorted open or not installed 5 Outdoor temperature sensor shorted E6 Low superheat during cooling E7 Compressor shutdown high or low refrigerant pressure or low oil pressure E9 Multi in Multi out wiring error OTHERS Coo Room Temperature sensor open or not connected Instead of displaying box temperature Loc Board is locked Settings cannot be changed UnL
29. e system will run in the cooling mode a minimum of 2 minutes even if the setpoint temperature is met In applications where the system is grossly oversized the box temperature could go below the differential temperature before the system cycles off In the OFF cycle the system will be off for a minimum of 4 minutes even if the box temperature goes above the differential temperature before cooling will be restarted board room thermostat is factory set at 35 F for Air Defrost systems and 10 F for electric defrost system 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 leak detector is highly recommended because of its greater sensitivity to small leaks As a further check it is recommended that this pressure be held for a minimum of 12 hours and then rechecked For a satisfactory installation the system must be leak tight REFRIGERANT CHARGING Beacon systems are shipped standard with a head master valve Scroll compressor models has a 100 Psi head master valve All other models have a 180 Psi head master valve The maximum system refrigerant capacity is the receiver capacity as listed in the sales literature plus the liquid line capacity Do not add more refrigerant to the system than 90 of the receiver capacity HEATCRAFT Start Up Operation
30. et the system run as it may take a few cycles for the electric expansion valve to attain the correct setting for the desired superheat CAUTION Extreme care must be taken in starting compressors for the first time after system charging At this time all of the oil and most of the refrigerant might be in the compressor creating a condition which could cause compressor damage due to slugging Activating the crankcase heater for 24 hours prior to start up is recommended If no crankcase heater is present then directing a 500 watt heat lamp or other safe heat source on the lower shell of the compressor for approximately thirty minutes will be beneficial in eliminating this condition which might never reoccur 34 HEATCRAFT Worldwide Refrigeration Service Record Date of Start up Location Address CONDENSING UNIT MODEL SERIAL COOLER UNIT MODEL SERIAL FREEZER UNIT MODEL SERIAL ELECTRICAL Check Primary Supply voltage If 208 V change transformer wiring in the Cooler and Freezer to the 208 V tap OYES Check Compressor Amps for COOLER and FREEZER compressors Should match nameplate OYES ONO PIPING Is suction line trapped at the Cooler LIYES LINO 5 suction line trapped at the Freezer LIYES LINO DRAIN LINES Are drain lines sloped properly LIYES LINO 5 drain line trapped outside the Cooler LIYES LINO 5 drain line trapped outside the Freezer
31. g defrost Defaults electric defrost 5 F and defrost 50 F Alarm Low Temperature ALL Temperature at which a Low Box Temperature alarm will be triggered Defaults Electric Defrost 15 F and Air Defrost 30 F Alarm Time ALt Time which High Temperature or Low Temperature condition must exceed before alarm is triggered Default 60 minutes e 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 Il board Use the MONITOR button to review these items SUP Superheat F C ESP Expansion valve steps 0 to 255 steps SCt Suction temperature F C SSt Saturated Suction temperature F C SCP Suction pressure at Evaporator PSIG HG Odt Outdoor temperature F C dFt Defrost sensor temperature F C dFS left until next defrost hours on version 1 8 boards 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 The heaters O are then turned on The display will show dEF and room temp Use this button to RESET TIME Pressing this button will reset the time clock in the microprocessor to zero At initial
32. ght On condensing units Check setting of Time Delay relay It should be set at 1 minute the second marker Check the Low Pressure Switch setting on freezer units It must be set to 0 PSIG cutout 10 PSIG cut in to allow positive start and operation especially in cold ambient This can be changed to a higher value in warmer climates On cooler units the Low Pressure switch has a fixed setting and cannot be adjusted Turn power on On MASTER Evaporator DO NOT REMOVE the Room Sensor from any evaporator On SLAVE evaporators All Beacon Il boards are shipped with the factory default as a MASTER evaporator Each SLAVE evaporator must be changed to identify it as a SLAVE Use the PROGRAM REVIEW button to scroll until SLA appears then use the SELECT knob to select YES then press ENTER Use the Beacon Il Smart Controller to set system parameters See Beacon Il Smart Controller installation instructions for more details MULTIPLE SYSTEM CONNECTION See Smart Controller instruction manual for more details SYSTEM 1 SYSTEM 2 SYSTEM 3 S S S S S S CU M S M S M S CU CU M S CU SMART A E CONTROLLER SYSTEM 4 M Master Evaporator Slave Evaporator CU Condensing Unit HEATCR
33. hange the number of defrost cycles or adjust the duration of defrost CONDENSING UNITS EVAPORATORS Under normal usage conditions maintenance should cover the following items at least once every 6 months 1 Check and tighten ALL electrical connections Check all wiring and insulators Check contactors for proper operation and for worn contact points Check all fan motors Tighten motor mount bolts and nuts and tighten fan set screws Clean the condenser coil surface Check the refrigerant and oil level in the system Check the operation of the control system Make certain all safety controls are operating properly Check that all defrost controls are functioning properly 9 Clean the evaporator coil surface 10 Clean the drain pan and check the drain pan and drain line for proper drainage 11 Check the drain line heater for proper operation cuts and abrasions 12 Check and tighten all flare connections ONOAR WN Check Out amp Start Up After the installation has been completed the following points should be covered before the system is placed in operation a Check all electrical and refrigerant connections Be sure they are all correct and tight b Check voltage taps on transformer The transformer is shipped wired to 240 voltage tap connection If your supply voltage is 208 volt systems change to 208 voltage tap c Check setting of time delay relay for low pressure switch in condensing unit It should be set at one
34. ion valve when brazing the refrigerant line connections The suction line sensor should be removed before brazing POWER SUPPLY The Beacon Il board gets 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 If your supply voltage is 208 volt you must change to the 208 volt tap on the transformer VERY IMPORTANT If the supply voltage to the evaporator is 208 volts the primary tap of the transformer must be moved to the 208 volt tap This must be done for all the evaporators on that system If the 24 VAC power supply falls below 18 VAC the system may power down and shut off When the power supply is corrected to 24 VAC the system will restart after the four minute hold off period and resume normal operation On Beacon Il systems the main power for the evaporator can be supplied separately from the power supply of the condensing unit All wiring however must comply with local electrical codes WIRING Wiring between the condensing unit and the unit cooler s will be as follows see wiring diagrams High voltage There may be high voltage on the defrost heater relay and the fan relay The evaporator may also be connected to a separate power supply from the condensing unit See unit cooler spec plate for ampacity Low voltage 24V Class II control circuit A total of five low voltage leads are requi
35. minimum 2 minutes hold on cycle The four minute Hold off can be bypassed and the system started immediately by pressing the Reset button on the Beacon Il board OPERATING MODE DISPLAY OFF Off Coo Cooling Pumpdown dEF Defrost Draining dLY Delay tSt Test SEr Service Programming amp Reviewing 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 Each time the button is pressed a different setpoint item is displayed Next use the SELECT knob to change value of Setpoint Item Next When the desired value is selected press the ENTER button to place it in program memory If 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 A ror ELF 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 dFn Set Number of defrosts day 1 2 3 4 5 6 8 10 12 per day dFF Set Defrost Fail safe time 10 to 200 minutes dFt Set Defrost End temperature 40 F to 100 F dFS Set Defrost Delay Start Time
36. power up pressing this button will bypass the 2 four minute hold off and the system will start immediately after O the expansion valve opens This display will show dLy Use this button to FORCE SERVICE Pressing this button TWICE will cause the system to pumpdown and the compressor to shut off The system will remain off until the CLEAR button is pressed While in the FORCE SERVICE the LED display will only show SEr 14 Programming amp Reviewing PROGRAMMING AND REVIEWING SETTINGS CHANGES cont d Use this button to CLEAR TEST Pressing this button ONCE will return the LED display to the default display 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 for 10 seconds The display will only show tst during TEST mode Test mode will automatically O terminate after 3 sequences LOCKING THE BEACON BOARD The Beacon Il board is lockable to prevent programmed setting changes by unauthorized personnel When locked the program setpoints cannot be changed To lock the setting Press PROGRAM REVIEW button Press and hold MONITOR button While holding MONITOR button press ENTER button e The LCD will display Loc This will prevent unauthorized personnel program changes To unlock repeat steps above LCD will display UnL STATUS INDICATOR LED A RED three
37. r check involves checking the various temperature sensors to determine whether any of these sensors are shorted or open The system will pumpdown and cycle off and will not restart until the fault is cleared or the circuit breaker reset for the following conditions Suction sensor shorted open or not installed Room temperature sensor shorted or not installed Pressure Transducer open or not installed The system will pumpdown cycle off and try to restart for these faults Each try will be after the 4 minutes Hold Off period for the following fault conditions High pressure or low pressure cutout Oil pressure After the fourth try the Alarm contacts will be closed and an alarm message displayed on the LED To clear this condition the system should be cycled through the Service Mode after the correction is completed ERROR CODES Room temperature sensor shorted open or not installed Defrost temperature sensor shorted open or not installed Suction temperature sensor shorted open or not installed Suction pressure transducer shorted open or not installed 5 Outdoor temperature sensor shorted 6 Low superheat 7 Compressor shut down high low pressure switch open or oil pressure switch open 9 Multi in multi out wiring error EVAPORATOR FANS SHUT OFF In some installations it is desirable to shut off the evaporator fans periodically This is easily accompli
38. rators are shipped from our factory with a preset box setpoint temperature of 35 F for air defrost and 10 F for electric defrost If your box setpoint temperature requirements are different this must be set using directions outlined under Room Temperature Control The suction line temperature sensor MUST be removed from the suction line before brazing the suction tubing The sensor MUST then be reinstalled on the suction line after brazing is completed and the tubing has cooled Insulate when finished The low pressure switch time delay relay located in the condensing unit must be set to 1 minute e If electrical power will be connected prior to evacuation and charging of system unplug electric expansion valve from board until system is ready to be evacuated leak tested and charged Some systems may require the crankcase heater be energized 24 hours prior to start up The Beacon 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 Apressure transducer is installed on the evaporator Do not leak test system above 150 PSI or damage to transducer could occur If leak testing must be greater than 150 psig disconnect the transducer from he suction header and reconnect after testing is complete CONDENSING UNIT The condensing uni
39. red 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 maximum distances are Condensing unit to Master evaporator 500 ft Between evaporators 500 ft Smart Controller to Master evaporator 1000 ft Wiring Configuration WIRING cont d e Multiple units The zu and mu fi out are the communication connections Connection sequence must follow the 7u f out terminal to the 7u t in terminal and the ulfi ouf back to the zu fi nterminal in a daisy chain loop Alarm circuit The onboard alarm is a dry set of NC contacts which closes to indicate an alarm The type and wiring for the alarm is customer specified Note that the alarm circuit does not distinguish or indicate what has caused the alarm All wiring must comply with all applicable codes and ordinances MULTIPLE EVAPORATOR CONFIGURATION Master Slave If there are multiple evaporators on a system the program for each SLAVE evaporator must be changed to identify it as a SLAVE To do so press the PROGRAM REVIEW button repeatedly until SLA appears then use the SELECT knob to select YES then press ENTER All Beacon Il
40. rge 3 Check EEV operation Check control board EEV signal Check suction sensor and transducer 4 Check EEV inlet screen and restrictions Check liquid line sizing Check head pressure controls 5 Check everything for E7 LPS above 6 Add or replace with more larger equipment 7 Correct setpoint to proper value 8 Check compressor application limitations Check integrity of compressor operation impaired worn or damaged components 9 Clean condenser coil 10 Remove all non condensables 11 Replace repair fan blade motor cycling switch or make corrective adjustments 12 Compare board setpoint and refrigerant 13 Defrost coil and check defrost cycle see E2 settings setpoints and defrost sensor 14 Correct defrost setpoints in program frequency and termination of defrosts 15 Correct setpoint for more cooling surface 16 Correct setpoint for proper display values Terminating SERVICE MODE BOARDS ONLY 1 Must terminate using same switch 2 Press Clear button on board 3 Open connection between Ser and C Note If multiple switches were placed in Service Mode all must be open to terminate the mode with Beacon Il Smart Controller 1 Must terminate using same switch 2 Open connection between Ser and C 3 From program menu of Beacon Il Smart Controller Change SERVICE setpoint to Off Note If multiple switches were placed in Service Mode all must be open to terminate the mode
41. shed on Beacon Il by wiring a single pole single throw switch SPST between the terminals marked SERVICE and on the Beacon Il 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 The entire system will be shut off and remain off until the SPST switch is opened Air Defrost evaporator fans are setup to run constantly If there is a need to shut down the evaporator fans on an Air Defrost system this can be accomplished by wiring the evaporator fan motor or evaporator fan motor contactor through the fan relay on the Beacon Il board When this is done and the Air Defrost system is placed in SERVICE the evaporator fans will shut off when the system is in pumpdown 19 HEATCRAFT gt Checking Operation of Expansion Valve CHECKING OPERATION OF EXPANSION VALVE EEV To check if the expansion valve is closing properly Install a pressure gauge set to suction line at the condensing unit With the system running close the valve on the liquid line at the condensing unit The system should pumpdown and shut off on the Low Pressure switch LPS If the system does not pumpdown and trip on the LPS then the compressor valves are weak and needs to be changed After the system pumps down and trip on the LPS put the system in the service mode This will cause the Expansion valve to
42. t control panel contains the relays contactors time delay anda terminal block which is appropriately marked to match the low voltage wiring connections A sensor for outdoor air temperature measurement is installed on the condensing unit Condensing unit must be installed using proper refrigeration practices and codes Make sure there is sufficient clearances around unit for adequate air flow and access EVAPORATOR UNIT The evaporator contains the Beacon Il controller electric expansion valve pressure transducer distributor orifice transformer and three sensors These components are all factory mounted and wired The three sensors are factory mounted and provide input to the controller from the following defrost temp suction temp room temp Each evaporator unit must be installed using proper refrigeration practices and codes Make sure the piping is correctly sized and properly routed It is highly recommended that the liquid and suction lines be insulated There must also be good clearance around unit See Heatcraft Refrigeration Installation amp Operation Manual for more details Brazing Refrigerant Line Brazing CAUTION The electric expansion valve and the suction temperature sensor on the suction line are factory installed Care must be taken when brazing these lines at the evaporator Too high a temperature may destroy these components Heat absorbing compounds or wet rags must be used to protect the electric expans
43. the pins on top of the valve between locations A and B or C and D Note that the pins are not labeled A B C D This labeling is just for reference Also two of the pins at location B and location D have a wider spacing between them than between location A and C Expansion Valve Motor Winding Pins For valve sizes 29320003 and 29320004 the resistance measured between pin locations A and B or C and D should be approximately 336 Ohms when the valve is at 75 F For valve sizes 29320007 29320008 29320013 and 29320014 the resistance measured between pin locations A and B or C and D should be approximately 116 Ohms when the valve is at 75 F 20 Power Failures Measuring resistance between locations A and C or D will always show Open because these locations are between the motor windings When the valve is opening or closing the voltage measured between A and B or C and D should be between 20 to 22 VAC Measuring the DC volt of the EXV TEST pins on the board will also indicate if the expansion valve is open or close 0 volts DC indicates the valve is closed 5 volts DC indicates the valve is fully open A Values between 0 and 5 volts indicates how much the valve is open or close POWER FAILURES In the event of a power failure Beacon Il will automatically close the expansion valve to prevent refrigerant from migrating throughout the system After power returns with 24 VAC at the board the system will rest
44. ultiple 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 The default for each board is a Master so on Single Evaporator systems no change is required No of Defrost per Day A selection must be made for the number of defrosts cycles per day 1 2 3 4 5 6 8 10 or 12 per day If no selection is made Defaults electric defrost 4 per day and defrost 2 per day Defrost fail safe This is the maximum time allowed for a coil to remain defrost Defrost will be terminated if the defrost end temperature is not attained when this time has expired On multiple evaporator systems this is controlled by the Master unit Each board should have the same setting Defaults electric defrost 30 minutes and air defrost 40 minutes Defrost End Temperature dFt This is the temperature at which the Defrost will be terminated Defaults electric defrost 60 F and air Defrost 45 F Defrost Delay Start Time dFS This allows the delay of the start of the first defrost Defaults 0 5 hours to 23 5 hours Programming amp Reviewing AND REVIEWING SETTINGS CHANGES cont d Alarm High Temperature ALH Temperature at which a high box temperature alarm will be triggered This does not apply durin
45. unning 2 Check system charge 3 Check for proper operating superheat 4 Check for high superheat and EEV wide open 5 Check Low Pressure Safety Switch Cannot get to box 6 Compare equipment capacity with requirements Go to temperature 7 Check box temperature setpoint next step 8 Check compressor performance 9 Check condenser coil for dirt debris 10 Check condenser for non condensables 11 Check condenser fan operation 12 Check for correct refrigerant type 13 Check for iced evaporator coil 14 Check defrost parameters 15 Check superheat setpoint too high 16 Check display values F or C Placing system into SERVICE MODE BOARDS ONLY 1 Use Remote Service Switch in condensing unit 2 Pressing Force Service button board twice 3 Connection between Ser and C on board all are wired in parallel all will activate mode Service Mode ONLY Master board on multiple evaporator systems SEr is displayed with Beacon Il Smart Controller 1 Use Remote Service Switch in condensing unit 2 Connection between Ser and C on board 3 From program menu of Beacon Il Smart Controller Change SERVICE setpoint to all are wired in parallel any all will activate mode ONLY Master board on multiple evaporator systems 27 IF NOT OK 1 Check power to condensing unit Check position of Service Mode switches Check compressor overloads and contactor 2 Add or remove refrigerant to proper cha
46. upplied in each condensing unit for shutting off the system Closing the Service switch in the condensing unit will cause the system to pumpdown and shut off Ser will be displayed on the Beacon board LED and SERVIC is displayed on the Smart Controller LCD display The Evaporator Fan and Heaters will be de energized in the Service Mode The system will not restart until the SPST switch is placed in the NORMAL or OFF position or A remote Service switch can be added to the Beacon Il board across the Ser and C connections of the terminal block It will operate in the same manner as the switch above or The system can be pumped down by pressing the SERVICE button twice To restart the system press the CLEAR button or The system can be pumpdown for service by closing the Liquid line service valve in the condensing unit then closing the suction line service valve when the system trips on the low pressure switch In order for air defrost evaporator fan motors to cycle off during Service mode the fan motors must be wired through the fan relay on the Beacon Il board Defrost DEFROST TIMING When power is first applied to the system its timer starts counting time If 4 defrost are programmed it will initiate a defrost every 6 hours from when power was first applied Beacon Il does not have a real time clock Beacon does provide the ability to delay the starting of the first
47. ves 22515201 Unipolar valves 22515202 Pressure Transducer 28911201 Pressure Transducer Harness 22515101 Beacon Smart Controller 89704301 Smart Controller Software Package 89704101 Beacon Communications Hub 89708001 Only the sensor with white leads is shipped as a Service replacement part Smart Controller Software package is sold separately Table 4 Operational Limits OPERATIONAL LIMITS Voltage Range 18 VAC to 30 VAC Controlling Box Temp Range 30 F to 70 F Temperature Differential 2 F Cold Ambient Limits Start amp operate to 20 F 23 HEATCRAFT Expansion Valve Capacity 29320003 Part Number 100 BTUH 8160 R 22 100 BTUH 7680 R 404A R 507 Evaporator Temperature F Evaporator Temperature F 20 20 20 20 Pressure Drop Across Valve psi Pressure Drop Across Valve psi 100 BTUH 5760 100 BTUH 5040 29320004 39240 36840 27720 24600 29320007 08 96240 90480 67800 60120 29320013 181680 171000 128280 113640 29320014 266160 250440 187800 166320 Beacon Il Troubleshooting Guide PROBLEM LED is not lit LED shows Coo but compressor will not run ERROR CODES 7 Room Sensor E2 Defrost Sensor 3 Suction Sensor 4 Suction Transducer 5 Outdoor Sensor E6 Low Superheat During Cooling 0
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