Related Manuals for Heatcraft Refrigeration Products 25001501
Summary of Contents for Heatcraft Refrigeration Products 25001501
- Page 1 02/01 Part Number 25001501 INSTALLATION & OPERATING INSTRUCTIONS ® 2175 West Park Place Blvd. • Stone Mountain, GA 30087 • (770) 465-5600 • Fax: (770) 465-5990...
- Page 2 Installation, Start-Up, Operation, Troubleshooting •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.
- Page 3 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.
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Page 4: 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. •... -
Page 5: Room Temperature Control
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 . - Page 6 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.
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Page 7: Refrigerant Charging
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. -
Page 8: Refrigeration Mode
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. - Page 9 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.
- Page 10 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.
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Page 11: Status Indicator
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. -
Page 12: Evaporator Fans Shut-Down By Operators
STATUS INDICATOR LIGHT BLINK SEQUENCE Mode Blink Time Cooling 2 sec. 1 sec. Defrost 1 sec. Error 8 fast Error Codes • One blink — Superheat sensor shorted or open • Two blinks — Room temperature sensor shorted or jumper not installed •... - Page 13 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 •...
- Page 14 The initial factory settings for the BEACON MICROPROCESSOR BOARD are indicated on the following chart. ELECTRIC DEFROST FACTORY SETTINGS DEFROST CYCLES OR TIME 6 PER DAY/ 2 HRS 4 PER DAY/ 3 HRS 2 PER DAY/ 6 HRS 1 PER DAY/ 12 HRS ELAPSED X SUPERHEAT 12 F...
- Page 15 PARTS LIST (Parts Dept. 800-686-7278) PART DESCRIPTION Temperature Sensor Transformer 208/240 - 24 volt - 40 VA Transformer 208/240 - 24 volt - 75 VA (10HP + up) Relay for condenser Fan or Crankcase Heater Contactor for Compressor 40 amp with 24 volt Coil Control Board for Electric Defrost Control Board for Air Defrost Terminal Block...
- Page 16 BEACON TROUBLE-SHOOTING GUIDE FAULT OR PROBLEM System runs 4 minutes then cycles off, then repeats System runs continuously System runs erratically Sensor was changed but fault signal still appears System flashes low superheat fault System flashes low pressure, high pressure or oil pressure fault BEACON CONTROLLER THINGS TO CHECK...
- Page 17 BEACON TROUBLE-SHOOTING GUIDE (cont’d.) System will not run Coil frost pattern is uneven BEACON CONTROLLER 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.
- Page 18 BEACON UNI-POLAR EXPANSION VALVE TEST VOLTAGES TEST (dc volts) VALVE OPEN VALVE CLOSED 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 &...
- Page 19 SERVICE DIAGNOSIS CHART - BEACON PROBLEM POSSIBLE CAUSE Compressor will not run 1. 4 min. off cycle 2. Box temp is below t’stat setting 3. Loose wiring 4. Bad sensor 5. Discharge temp. too high 6. Beacon board defective 7. Low pressure switch open 8.
- Page 20 SERVICE DIAGNOSIS CHART - BEACON (cont’d.) PROBLEM POSSIBLE CAUSE Beacon Board Status 1. Supply voltage too high Light Flashes Erratically 2. Supply voltage too low 3. Bad board SERVICE DIAGNOSIS CHART - GENERAL PROBLEM POSSIBLE CAUSE Compressor will not run 1.
- Page 21 SERVICE DIAGNOSIS CHART - GENERAL PROBLEM POSSIBLE CAUSE Low suction pressure 1. Insufficient refrigerant 2. Freezer coil iced up 3. Plugged liquid line filter drier 4. Plugged suction filter 5. Expansion valve starving coil Loss of oil or loss of oil 1.
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- Page 35 BEACON CONTROLLER Notes...
- Page 36 Visit our web site at www.heatcraftrpd.com for Technical Literature Online. Since product improvement is a continuing effort at Heatcraft, we reserve the right to make changes in specifications without notice. 2175 West Park Place Blvd. •Stone Mountain, GA 30087 •(770) 465-5600 • Fax: (770) 465-5990...