Instruction/ maintenance manual of the product BG 2000 Sea Frost
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372 ROUTE 4 BARRINGTON, NH 03825 USA TEL (603) 868-5720 FAX (603) 868-1040 1-800-435-6708 E-Mail:sales@seafrost.com www.seafrost.com OPERATION & INSTALLATION INSTRUCTIONS BG 2000 404a SERIES C.F. HORTON & CO., INC. 372 ROUTE 4 BARRINGTON NH 03825 U.
2 TABLE OF CONTENTS BG 2000 OPERATION 4 ICE MAKING 5 MAINTENANCE 6 HOW REFRIGERATION WORKS 8-9 INSTALLATION 10 SWAGELOK FITTINGS 11-13 CONDENSING UNIT LOCATION 14 VALVE 15 PUMP INSTALLATION 16 THERMOS.
3 372 ROUTE 4 BARRINGTON, NH 03825 USA TEL (603) 868-5720 FAX (603) 868-1040 1-800-435-6708 E-Mail:sales@seafrost.com www.seafrost.com A VIEW OF THE FUTURE: As a once wonderful invention, refrigerants ar e now the latest enemy as our awareness of the universe increases.
4 BG 2000 OPERATION The SEA FROST BG 2000 system is an electrically driven refrigeration plant. Operation of the compressor will freeze the contents of the holdover devices in the boat's icebox providing refrigeration by cold holdover for an extended period after the compressor has been turned off.
5 ICE MAKING Your SEAFROST holdover plate may be equipped with vertical ice trays. The ice trays are held in contact with the plat e by a stainless steel rod.
6 BG 2000 MAINTENANCE Like your engine, your SEA FROST needs periodic checking. ROUTINELY CHECK: 1. The refrigerant charge. See: "Checking The Charge" text. NEVER OPERATE SYSTEM WITHOUT PROPER CHARGE. 2. All components, all tubing, fittings, and hose clamps for corrosion and wear.
7 It is IMPORTANT that NO WATER flows between the plastic housing and the pump body. The screws that hold the cover also seal the housing. Water behind the housing will ruin the motor bearings. BE SURE THE PUMP HOUSING IS ABSOLUTELY DRY BEFORE DISASSEMBLY.
8 HOW REFRIGERATION WORKS There are two important conc epts to understand in order to learn about refrigeration. They are latent heat and phase changes . A great deal of heat is required to change a so lid to a liquid, and a liquid to a gas. A great deal of heat must be removed to reverse these changes.
9 By causing R-404a to boil (evaporate) in the SEAFROST plates, we absorb the heat energy there. This activity cools the liqui d solution within the plates, causing them to change phase (freezing to a solid). By freezing this solution, we have increased its heat absorption capacity more than 100 times.
10 INSTALLATION Installer's care should be stressed. No matter how good SEA FROST equipment is, its performance and life are in the hands of the installer. To insure your work: 1. Read this manual. 2. Reread any aspect you don't understand. 3.
11 NOTES ON SWAGELOK FITTINGS Swagelok fittings come to you completely asse mbled, finger-tight. (Pieces a, b, and c in Drawing #1 are already together). They are ready for immediate use. Disassembly before use can result in dirt and foreign material getting into the fitting and causing leaks.
12 DRAWING 1 STEP 1 Simply insert the tubing into the SWAGELOK tube fitting. Make sure that the tubing rest firmly on the shoulder of the fitting and that the nut is wrench snug. STEP 2 Before tightening the SWAGELOK nut, scribe the nut at the six o'clock position.
13 STEP 3 Now, while holding the fitting body steady with a backup wrench, tighten the nut 1 1/4 turns. Watch the scribe mark, make one complete revolution and continue to the 9 o'clock position. By scribing the nut at the 6 o'clock position as it appears to you, there will be no doubt as to the starting position.
14 CONDENSING UNIT LOCATION AND MOUNTING The design of the BG 2000 allows placement of the unit in an enclosed space such as a cabin locker, sail locker or engine area.
15 INSTALLING THE THERMOSTATIC EXPANSION VALVE The larger fitting on the thermostatic expans ion valve connects with a Swagelok to one of the plate tubes. In a multiple plate seri es system ½” copper jumper lines will connect the plates to each other.
16 RUNNING THE TUBING Make the connection to the compressor and RFD after all other connections are made . A 1/4" copper tube runs between the compresso r unit and the expansion valve. Multiple plate hook-ups should be assembled as indica ted by the specific diagram provided.
17 RFD (Receiver Filter Drier) The RFD contains desiccant to absorb moisture This absorption is limited . Leaving the RFD installed on a partially open system may reduce its capacity by allowing it to absorb moisture. The RFD is a reservoir for excess refrigerant.
18 WIRING THE PUMP The pump is connected by three wires at the compressor unit. The pump operation is controlled by the BG2000. REFRIGERANT HANDLING AND SAFETY Do not proceed with any aspect of a procedur e if you do not fully understand the procedure and know what result to expect.
19 PROCEDURES FOR WORKING WITH R-404a 1) A new uncharged system must be evacuated before adding R-404a. 2) An R-404a system must only be pr essurized with R-404a or nitrogen.
20 GAUGES Gauges must be used in the evacuation and c harging. They will provide information on the operation of the syst em when troubleshooting. A gauge sets consist of two gauges installed in a manifold with two valves and hoses to connect the gauges to the system.
21 Disconnecting the gauge set on a static system may be done by rapidly unscrewing the hoses from the service ports. Adding charge to a working system should be done through the suction side (blue) as liquid. The suction pressure must be m onitored and not allowed to rise more then 15 PSIG above operating pressure.
22 NEW SYSTEM CHARGING INTRODUCING INITIAL CHARGE After the evacuation leak test and pump down, shut off the manifold valves, disconnect the center hose from the pump and connect it to a cylinder of refrigerant Vent the hose from cylinder (refrigerant supply) to the m anifold.
23 TO CHECK WITH BUBBLES Soap each connection and observe all sides of the connection with a bright light and a mirror. A leak will blow bubbles. Without careful examination and plenty of pressure this test is not reliable. TO CHECK WITH AN ELECTRONIC DETECTOR Use a detector designed for HFCs.
24 3. The sight glass will show a stream of foam indicating a partial charge. 4. Introduce liquid refrigerant (liquid is supplied by keeping the cylinder inverted) at a controlled pressure regulated by sli ghtly opening the blue hand wheel valve. Keep the low side pressure no more than 15 PSIG above the indicated operating pressure.
25 A white stream of fast moving foam with the compressor operating indicates an insufficient charge level. Watch closely fo r a transition from foam to total liquid, indicated by a clear sight glass. This trans ition point can be missed if proper attention is not given.
26 SPECIAL NOTE R-404a will become cloudy and indicate similar foaming in the sight glass as the pressure on the hi-pressure side of the system s becomes too great. Adding charge to clear this condition will damage the compressor. Be sure you know the pressures you should have for the corresponding water temperature.
27 TROUBLESHOOTING The most common problems that can occu r in a SEA FROST BG 2000 System are: (1) Overcharge or loss of water flow swit ching off the manual reset high-pressure switch. (2) Loss of refrigerant charge resulting from leaks. (3) Moisture or dirt plugging the expansion valve.
28 b) If pressure reading is over 100 psig with compressor off, proceed to check charge level via sight glass and charge if needed. CHARGE LOSS INDICATES A LEAK THAT MUST BE CORRECTED. STEP 2. If a system continues to operate inefficiently after Step 1, check for moisture or dirt plugging the valve.
29 Follow the "re-make" instructions for Swagelok fittings. Reminder: To ensure the total removal of m oisture from the system use a high vacuum pump, and evacuate the system with the highest possible plate tem perature (100 degrees F.). A light bulb or heat lamp in contact with the plates is a good technique.
30 BG 2000 Specifications and Operating Characteristics 115-volt 50/60 hz 230-volt 50/60 hz Horsepower 1 HP 1HP Refrigerant 404-a 404-a Oil Polyol ester oil Polyol ester oil Locked rotor amps 76.
31 Figure 1.
32 WATER CIRCUIT.
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36 372 ROUTE 4 BARRINGTON, NH 03825 USA TEL (603) 868-5720 FAX (603) 868-1040 1-800-435-6708 E-Mail:sales@seafrost.com www.seafrost.com THERMOSTAT CALIBRATION INSTRUCTIONS Note: Be sure that the unit is operat ing properly before making any thermostat adjustments.
37 HOLDOVER PLATES STAINLESS STEEL EVAPORATOR PLATES.
An important point after buying a device Sea Frost BG 2000 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Sea Frost BG 2000 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Sea Frost BG 2000 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Sea Frost BG 2000 you will learn all the available features of the product, as well as information on its operation. The information that you get Sea Frost BG 2000 will certainly help you make a decision on the purchase.
If you already are a holder of Sea Frost BG 2000, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Sea Frost BG 2000.
However, one of the most important roles played by the user manual is to help in solving problems with Sea Frost BG 2000. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Sea Frost BG 2000 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
