Heatcraft-refrigeration-products H-IM-79D User Manual

Installation & OperationManualH-IM-79D February, 2004Part Number 25001401Replaces H-IM-79C (12/03)™

10MULTIPLE SYSTEMS with MULTIPLE EVAPORATORS(Requires a Smart Controller)• Check all wiring connections to be sure they are correct and tight.• On con

11INITIAL POWER ONAt the initial application of power to the system, the compressor and the evaporator fanswill be in a 4 minute hold-off cycle and wi

12PROGRAMMING AND REVIEWING SETTINGS/CHANGESThe Program Review button is used to program, review and change all program settingsfor the system.Press “

13PROGRAMMING AND REVIEWING SETTINGS/CHANGES (cont’d.)Use the “PROGRAM REVIEW” button to select these items:• Defrost Type – “A-E ” - Selection is

14PROGRAMMING AND REVIEWING SETTINGS/CHANGES (cont’d.)• Alarm High Temperature - “ALH” - Temperature at which a high box temperature alarmwill be

15PROGRAMMING AND REVIEWING SETTINGS/CHANGES (cont’d.)Use this button to “CLEAR/TEST”Pressing this button ONCE will return the LED display to the defa

16STATUS INDICATOR LED• ERRORSE 1- Room temperature sensor shorted, open or not installedE 2- Defrost temperature sensor shorted, open or notinstalled

17DefrostDEFROST TIMINGWhen power is first applied to the system, its timer starts counting time. If 4 defrost areprogrammed, it will initiate a defro

18ELECTRIC DEFROST MODEWhen a defrost is initiated, the EEV closes, the compressor is allowed to pumpdown andshut off. The evaporator fans are cycled

19ERROR INDICATOR LEDAt initial power up, each Beacon board checks for system errors. The system error checkinvolves checking the various temperature

2Beacon II Board layout ...3Installation Tips ...

20CHECKING OPERATION OF EXPANSION VALVE (EEV)To check if the expansion valve is closing properly:Install a pressure gauge-set to suction line at the c

21POWER FAILURESIn the event of a power failure Beacon II will automatically close the expansion valve toprevent refrigerant from migrating throughout

22System DefaultsTable 2. System DefaultsPARAMETERS CODE AIR ELECTRICRefrigerantrEFR-22 R-404ABox Temperaturebot35°F-10°FSuperheatSUP8°F8°FSlave Evap

23Table 3. Parts ListHRPD PARTPART DESCRIPTION NUMBERBeacon II Control Board 28910101*Temperature Sensor kit – White Leads 89904902Transformers:120/2

24Beacon II Troubleshooting Guide PROBLEM Step ACTION ITEM IF OK IF NOT OK1. Check Primary Power Supply Disconnect 1. Check fuses and circuit break

25 PROBLEM Step ACTION ITEM IF OK IF NOT OK1. Check wiring connection to the board • Correct field wiring to the board2. Low Pressure Safety (LPS) T

26Beacon II Troubleshooting Guide (continued) PROBLEM Step ACTION ITEM IF OK IF NOT OKE9 Multi-out to Multi-in 1. Check for 24 volts power to the

27 PROBLEM Step ACTION ITEM IF OK IF NOT OK1. Check system operation: Is it running? 1. Check power to condensing unit Check position of Service

28Wiring

29Wiring

3Beacon II Board LayoutBEACON II BOARDHeaterRelayFanRelayLEDDisplayRoomSensorDefrostSensorSuctionSensorSuctionPressureExpansionValveConnectionSelectio

30Wiring

31WiringPart No. 29684301

32WiringPart No. 29684201

33WiringPart No. 29684001

34EVAPORATORSAll evaporator units should be checked once a month or more often for proper defrosting because the amountand pattern of frosting can var

35Service RecordDate of Start-upLocation AddressCONDENSING UNITMODEL #SERIAL #COOLER UNITMODEL #SERIAL #FREEZER UNITMODEL #SERIAL #ELECTRICAL• Check P

362175 West Park Place Blvd. • Stone Mountain, GA 30087770-465-5600 • Fax: 770-465-5990 • www.heatcraftrpd.comSince product improvement is a continuin

4Installation Tips• Use a minimum 18 gauge wire for all low voltage connections.• The Beacon II board gets its 24 VAC power supply from a transformer

5Refrigerant Line Brazing (CAUTION)The electric expansion valve and the suction temperature sensor on the suction line arefactory installed. Care m

6WIRING (cont’d.)• Multiple units – The multi-in and multi-out are the communication connections. Connection sequence must follow the multi-out

7BOX TEMPERATURE CONTROL SETTINGS• There is an on board room thermostat on the Beacon II board which can be adjusted to the desired room tempera

8CU MM = Master Evaporator CU= Condensing unitStart-Up OperationSINGLE SYSTEM with 1 EVAPORATOR• Check all wiring connections to be sure they are corr

9SINGLE SYSTEM with MULTIPLE EVAPORATORS• Check all wiring connections to be sure they are correct and tight.• On Condensing unit- Check the setting o