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02/01
Part Number 25001501
INSTALLATION & OPERATING
INSTRUCTIONS
FOR
®
2175 West Park Place Blvd. • Stone Mountain, GA 30087 • (770) 465-5600 • Fax: (770) 465-5990
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BEACON CONTROLLER QUICK GUIDE Installation, Start-Up, Operation, Troubleshooting Installation •Use 18 gauge wire for 24-volt connections between evaporators and condensing unit. •Remove suction line sensor before brazing; reinstall suction sensor after brazing is completed and suction line has cooled; insulate with insulation provided. •If an electric defrost evaporator is being applied in a medium temperature application, have the nozzle size checked for proper sizing. Condensing Unit •Set tran
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BEACON CONTROLLER QUICK GUIDE (cont’d.) Defrost •The actual defrost time is determined when power is first applied to the system as well as the number of defrosts per day. If a Smart Controller is used, the actual defrost times are programmed into the Smart Controller. •At defrost the expansion valve closes, then the system pumps down until the low pressure switch opens or 2 minutes have elapsed. The compressor is now off. •The fan motors are shut off and the heater contactor on the Beacon board
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BEACON CONTROLLER INSTALLATION INSTRUCTIONS Before Installing or Starting Unit: • Use a minimum 18 gauge wire for low voltage connections to cooler, condensing unit and Smart Controller. • Transformer is shipped wired for 240V primary; if your supply voltage is 208V, change to the 208V tap. • Refer to wiring schematic shipped on units for wiring; schematics in the Installation & Operation Manual are typical schematics. • If desired box temperature is different from preset factory temperatures (3
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BEACON CONTROLLER REFRIGERANT LINE BRAZING (CAUTION) The electric expansion valve on the liquid line 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 when braz- ing the refrigerant line connections and the suction line sensor removed per above instructions. WIRING Wiring between the condensing unit a
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BEACON CONTROLLER ROOM TEMPERATURE CONTROL (Cont’d.) • Another method of setting the room set-point is to use the Beacon board thermostat pot. If a value other than that available by using a fixed resistor is required, the pot on the Beacon board can be used. First, you must discard the fixed resistor. Then, using a digital ohmmeter, measure the resistance between the “X” and “200K” as indicated in the illustration below. Use a screwdriver to turn the thermostat pot until the resistance value is
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BEACON CONTROLLER BEACON MICROPROCESSOR SETTINGS (See Table 3 for more details.) Selections to be made by applying movable jumpers: Defrost cycles or time - Controlled by the board in master unit only. Selection must be either “elapsed” time or “run” time. If “elapsed” time is selected, the number of defrost must be set at either 1, 2, 4 or 6 per day. If no selection is made, default is 4 defrosts per day. If “run” time is selected, the compressor run time must be set at either 2, 3, 6, or 1
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BEACON CONTROLLER OPERATING INSTRUCTIONS REFRIGERATION MODE START UP 1. Check all wiring connections to be sure they are correct and tight. 2. Check voltage taps on transformer. The transformer is shipped wired for 240. If your supply voltage is 208 volt systems, charge to 208 voltage tap. 3. Check setting of time delay relay in condensing unit. It should be set at two minutes (the third marker). 4. Check the low pressure switch setting. It must be set to 0 PSIG cut out, 10 PSIG cut in, to all
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BEACON CONTROLLER Ambients below 50° F and above 10° F At the initial application of power to the system, the compressor and the evaporator fans will be in a four minute hold-off cycle and will not start immediately. When there is a call for cooling, the compressor starts and the electric expansion valve (EEV) stays closed for 12 seconds. After 12 seconds the EEV goes to 7/8 open and the compressor is put in a four minute “hold-on” cycle. Superheat adjustments at two minute intervals will the
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BEACON CONTROLLER PUMP-DOWN At the end of each cooling cycle, when the box temperature is met, the system will pumpdown and shut off. To pumpdown, the EEV closes and the compressor pumps down until the low pressure switch trips the unit off, or two minutes have elapsed. While in the off cycle the system will initiate a short pump-down at four minute intervals, if the low pressure switch is closed, to ensure that any refrigerant leakage, will not cause a problem. To Manually Pump-Down System The
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BEACON CONTROLLER STATUS INDICATOR There is a red status indicator light on the Beacon board. This light has a controlled blink sequence to indicate modes such as cooling, superheat, off, defrost, or error. (See status light blink sequence chart.) •COOLING/SUPERHEAT: During the cooling mode, the light will blink off for two seconds, on for two sec- onds, off for two seconds followed by a rapid sequence of blinks that if counted will indicate superheat. •OFF CYCLE: During the thermostat off c
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BEACON CONTROLLER STATUS INDICATOR LIGHT BLINK SEQUENCE Mode Blink Time Off Time Action Cooling 2 sec. 2 sec. Faster blinks for superheat count, then repeat Off 1 sec. 7 sec. Repeat Defrost 1 sec. 1 sec. Repeat Error 8 fast 2 sec. Slower blinks for error code, then repeat Error Codes •One blink — Superheat sensor shorted or open •Two blinks — Room temperature sensor shorted or jumper not installed •Three blinks — Compressor discharge temperature sensor shorted •Four blinks — High compressor disc
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BEACON CONTROLLER OPTIONAL SMART CONTROLLER The Beacon Smart Controller performs all the standard Beacon functions with the additional benefit of remote mounting for easy access. From the Smart Controller, the refrigeration system can be monitored and the program parameters changed, without the user going into the Cooler or Freezer Box. The Smart Controller allows the following: Monitoring •Superheat of each evaporator •The expansion valve setting (No. of steps open or closed) •The entering eva
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BEACON CONTROLLER TABLE 3 The initial factory settings for the BEACON MICROPROCESSOR BOARD are indicated on the following chart. ELECTRIC DEFROST AIR DEFROST FACTORY SETTINGS FACTORY SETTINGS DEFROST CYCLES OR TIME DEFROST CYCLES OR TIME 6 PER DAY/ 2 HRS 6 PER DAY/ 2 HRS 4 PER DAY/ 3 HRS X 4 PER DAY/ 3 HRS 2 PER DAY/ 6 HRS 2 PER DAY/ 6 HRS X 1 PER DAY/ 12 HRS 1 PER DAY/ 12 HRS ELAPSED X RUN TIME ELAPSED X RUN TIME SUPERHEAT SUPERHEAT 6°F6°F 8°FX 8°FX 12°F12°F DEFROST FAIL-SAFE DEFROST
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BEACON CONTROLLER PARTS LIST (Parts Dept. 800-686-7278) HRPD PART PART DESCRIPTION NUMBER Temperature Sensor 28900101 Transformer 208/240 - 24 volt - 40 VA 22522301 Transformer 208/240 - 24 volt - 75 VA (10HP + up) 22538401 Relay for condenser Fan or Crankcase Heater 22511401 Contactor for Compressor 40 amp with 24 volt Coil 2252440 Control Board for Electric Defrost 28910001 Control Board for Air Defrost 28910002 Terminal Block 2251266 Low Pressure Switch Time Delay Relay 22536801 Electric Ex
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BEACON CONTROLLER BEACON TROUBLE-SHOOTING GUIDE FAULT OR PROBLEM THINGS TO CHECK System runs 4 minutes then cycles off, then repeats 1. Check if sensors are connected correctly; if evaporator in/out are switched, this will cause low superheat 2. Check if system is piped properly 3. System will cycle off if discharge line gets above 225°F 4. Check evaporator coil circuits if they are feeding evenly; uneven feeding will cause flood-back 5. Check if expansion valve is correctly wired on Beacon boar
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BEACON CONTROLLER BEACON TROUBLE-SHOOTING GUIDE (cont’d.) System will not run 1. Check if red jumper wire (next to blue pot) is correctly connected across “X” terminals 2. Check red jumper wire terminals to make sure they are connected to the wire, not the insulation 3. Check to make sure system is correctly wired 4. Check system for low voltage or high voltage conditions; system must have voltage between 18-30 VAC for proper operation 5. Check if “EVAP IN” & “EVAP OUT” sensors are correctly ins
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BEACON CONTROLLER BEACON UNI-POLAR EXPANSION VALVE TEST VOLTAGES ESV TEST (Beacon Board connection) (dc volts) BLUE RED WHT BLK YEL VALVE OPEN 4.4 15.6 15.6 15.7 15.6 VALVE CLOSED 0 15.3 15.3 15.4 15.5 Com 24 Vdc Notes: 1. All volts shown are measured while in the “TEST” mode and are DC 2. The volts shown for each step (BLUE, RED, WHT, BLK) are measured between the YEL-Com & the corresponding pin 3. The volts shown for each step is available only when the valve is activated. The voltage value wi
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BEACON CONTROLLER SERVICE DIAGNOSIS CHART - BEACON PROBLEM POSSIBLE CAUSE POSSIBLE CORRECTIVE ACTION Compressor will not run 1. 4 min. off cycle 1. Wait 4 min. 2. Box temp is below t’stat setting 2. Lower t’stat setting 3. Loose wiring 3. Check all wire terminals; tighten if necessary. 4. Bad sensor 4. Check status light for problem sensor 5. Discharge temp. too high 5. Check general diagnosis chart 6. Beacon board defective 6. Check “Status” light; if out, replace board 7. Low pressure switch o
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BEACON CONTROLLER SERVICE DIAGNOSIS CHART - BEACON (cont’d.) PROBLEM POSSIBLE CAUSE POSSIBLE CORRECTIVE ACTION Beacon Board Status 1. Supply voltage too high 1. Check 24 volt supply; if above 30 volt Light Flashes Erratically correct immediately. 2. Supply voltage too low 2. Change transformer primary to correct supply 3. Bad board voltage tap. 208 or 240 volts. SERVICE DIAGNOSIS CHART - GENERAL PROBLEM POSSIBLE CAUSE POSSIBLE CORRECTIVE ACTION Compressor will not run 1. Fused disconnect
