Heatcraft Refrigeration Products H-IM-79B manuale d’uso

Installation & Operation Manual H-IM-79B ( 12/02) December , 2002 Part Number 25001401 Replaces H-IM-79A (04/02)[...]

2 Beacon II Board layout ........................................................................................................ 3 I nstallation Ti ps ................................................................................................................... 4 Brazing Power Supply Wiring ....................................................[...]

3 Beacon II Board Layout BEACON II BOARD Heater Relay Fan Relay LED Display Room Sensor Defrost Sensor Suction Sensor Suction Pressure Expansion V alve Connection Selection Buttons 24V Te r m inal Block[...]

4 Installation T ips • Use a minimum 18 gauge wire for all low voltage connections. • The Beacon II board gets its 24 V AC 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 mu[...]

5 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 . T oo high a temperature may destroy these components. Heat absorbing compounds or “wet rags” must be used to protect the electric expans[...]

6 WIRING (cont’d.) • Multiple units – The multi-in and multi-out are the communication connections. Connection sequence must follow the multi-out terminal to the multi-in terminal and the multi-out back to the multi-in terminal in a daisy chain loop. • Alarm circuit - The onboard alarm is a dry set of NC contacts which closes to indicate an[...]

7 BOX TEMPERA TURE CONTROL SETTINGS • There is an on board room thermostat on the Beacon II board which can be adjusted to the desired room temperature. The temperature dif ferential is 2 ° F. T emperature 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[...]

8 CU M M = Master Evaporator CU = Condensing unit Start-Up Operation SINGLE SYSTEM with 1 EV APORA TOR • Check all wiring connections to be sure they are correct and tight. • On condensing unit - Check the setting of T ime Delay relay . It should be set at 1 minute (the second marker). - Check the Low Pressure switch setting on freezer units. I[...]

9 SINGLE SYSTEM with MUL TIPLE EV APORA TORS • Check all wiring connections to be sure they are correct and tight. • On Condensing unit - Check the setting of T ime 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 po[...]

10 MUL TIPLE SYSTEMS with MUL TIPLE EV APORA T ORS (Requires a Smart Controller) • Check all wiring connections to be sure they are correct and tight. • On condensing units - Check setting of T ime 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 c[...]

11 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-[...]

12 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 displ[...]

13 PROGRAMMING AND REVIEWING SETTINGS/CHANGES (cont’d.) Use the “PROGRAM REVIEW” button to select these items: • Defrost T ype – “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[...]

14 PROGRAMMING AND REVIEWING SETTINGS/CHANGES (cont’d.) • Alarm High T emperature - “ ALH” - T emperature at which a high box temperature alarm will be triggered. This does not apply during defrost. Defaults: electric defrost +5 ° F and air defrost +50 ° F. • Alarm Low T emperature - “ALL” - T emperature at which a Low Box T emperat[...]

15 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 d[...]

16 ST A TUS INDICA T OR LED • ERRORS E 1 - Room temperature sensor shorted, open or not installed E 2 - Defrost temperature sensor shorted, open or not installed E 3 - Suction temperature sensor shorted, open or not installed E 4 - Suction pressure transducer shorted, open or not installed E 5 - Outdoor temperature sensor shorted E 6 - Low superh[...]

17 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 II does not have a real time clock. Beacon II does provide the ability to delay the starting of the first defrost. DEFROST DELA Y ST ART [...]

18 ELECTRIC DEFROST MODE (cont’d.) There is a 2 minute condensate drain-down period after which the compressor is started for a refreeze period. The evaporator fan stays of f (fan delay). The refreeze period will last until the evaporator suction temperature is at 28 ° F or 2 minutes has elapsed. After this sequence, the system is back in the re[...]

19 ERROR INDICA TOR LED At initial power up, each Beacon 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 open. The system will pumpdown and cycle off and will not restart until the fault is cleared or the circuit breaker reset, for the [...]

20 CHECKING OPERA TION OF EXP ANSION V AL VE (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[...]

21 POWER F AILURES In the event of a power failure Beacon II will automatically close the expansion valve to prevent refrigerant from migrating throughout the system. After power returns, with 24 V AC at the board, the system will restart in the cooling mode after the four-minute hold off period. SP ARE SENSOR TERMINALS Beacon II provides a set of [...]

22 System Defaults T able 2. System Defaults P ARAMETERS CODE AIR ELECTRIC Refrigerant rEF R-22 R-404A Box T emperature bot 35 ° F- 1 0 ° F Superheat SUP 8 ° F8 ° F Slave Evaporator SLA No No No. of Defrost per Day dFn 24 Defrost Fail-safe time dFF 40 min. 30 min. Defrost End T emperature dFt 45 ° F6 0 ° F Defrost Delay Start T ime dFS 0 hrs.[...]

23 T able 3. Parts List HRPD P ART P ART DESCRIPTION NUMBER Beacon II Control Board 28910101 *T emperature Sensor kit – Blue Leads 89904902 T ransformers: 120/24 volt– 40 V A 22529601 240/24 volt - 40 V A 22529602 460/24 volt – 40 V A 22529603 575/24 volt – 40 V A 22529701 Pilot Relay 2251 1401 Contactor for Compressor 40 amp with 24 volt C[...]

24 Beacon II T roubleshooting Guide PROBLEM Step ACTION ITEM IF OK IF NOT OK 1. Check Primary Power Supply Disconnect 1. Check fuses and circuit breakers 2. Check V oltage to Evaporator T ransformer Go to 2. Check field wiring for breaks LED is not lit. 3. Check T ransformer Secondary Output V olts next step 3. Replace if necessary 4. Check V oltag[...]

25 PROBLEM Step ACTION ITEM IF OK IF NOT OK 1. Check wiring connection to the board • Correct field wiring to the board 2. Low Pressure Safety (LPS) T ripped: • Check for correct refrigerant type • Change setpoint to match refrigerant • Check refrigerant charge • Add more refrigerant to proper charge • Check LPS setting • Correct LPS [...]

26 Beacon II T roubleshooting Guide (continued) PROBLEM Step ACTION ITEM IF OK IF NOT OK E9 Multi-out to Multi-in 1. Check for 24 volts power to the board 1. If no voltage, see “LED is not lit” above Communication Wiring for low voltage, see “88888 LED display” (only shows after initial 2. Check for crossed communication wiring Go to 2. Cor[...]

27 PROBLEM Step ACTION ITEM IF OK IF NOT OK 1. Check system operation: Is it running? 1. Check power to condensing unit Check position of Service Mode switches Check compressor overloads and contactor 2. Check system charge 2. Add or remove refrigerant to proper charge 3. Check for proper operating superheat 3. Check EEV operation Check control boa[...]

28 W iring[...]

29 W iring[...]

30 W iring[...]

31 W iring Part No. 29684301[...]

32 W iring Part No. 29684201[...]

33 W iring Part No. 29684001[...]

34 EV APORA TORS 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 d[...]

35 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  YES • Check Compressor Amps for COOLER and FREEZER compressors. Should matc[...]

36 2175 West Park Place Blvd. • Stone Mountain, GA 30087 770-465-5600 • Fax: 770-465-5990 • www .heatcraftrpd.com Since product improvement is a continuing effort, we reserve the right to make changes in specifications without notice. RECORD OUTDOOR TEMPERA TURE ______ ° F SYSTEM VOL T AGE ______V olts ______PH ______Hz Cooler Compressor Amp[...]