Instruction/ maintenance manual of the product H-IM-79B Heatcraft Refrigeration Products
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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 ...................................................................................................
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 Blo.
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.
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.
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.
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.
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).
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.
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).
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.
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 .
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.
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.
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.
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 sho.
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.
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.
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.
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.
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.
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.
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 .
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.
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 .
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.
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.
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 .
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.
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.
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However, one of the most important roles played by the user manual is to help in solving problems with Heatcraft Refrigeration Products H-IM-79B. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Heatcraft Refrigeration Products H-IM-79B along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
