valutazioni - 2, GPA: 4 ( )

Produttore : Haier File Size : 2.65 mb File Nome : Lingua di insegnamento:

Note the following guidelines: 10" Min. Service Access 18" Min. Figure 3 10" Min. 10" 10" Service Access 18" Min. OUTDOOR UNIT OUTDOOR UNIT LIQUID LINE PITCH SUCTION LINE TOWARD OUTDOOR UNIT 1/2" FRO EVERY 10' OF LINE INDOOR UNIT ABOVE OR LEVEL TO OUTDOOR UNIT INDOOR UNIT ADDITIONAL SUCTION LINE OIL TRAP FOR EACH 20 FOOT RISE OF PIPE INDOOR UNIT LIQUID LINE SUCTION LINE OIL TRAP WHEN INDOOR UNIT IS 4 FEET OR MORE BELOW OUTDOOR UNIT INDOOR UNIT BELOW OUTDOOR UNIT 70' MAX. INVERTED LOOP LIQUID LINE OUTDOOR UNIT SUCTION LINE INDOOR UNIT 50' MAX. 6' B-1 A Figure 4 B-2 Only refrigeration-grade copper piping (dehydrated and sealed) should be used. Take extreme care to keep the refrigerant tubing clean and dry prior to and during installation. If in doubt, blow out the tubing with dry nitrogen to remove any chips or debris before connection. Always keep tubing sealed until it is in place and the connections are to be made. Refrigerant piping should be as short as possible, with a minimum of elbows or bends, to avoid capacity loss and increased operating costs. Refrigerant lines must be adequately supported. If metal strapping is used to secure the tubing, do not allow the strapping to directly contact the tubing. Use a closed cell insulation to separate the strapping from the tubing. Do not kink or twist the tubing. Refrigerant piping should not be installed in a cement slab, as this limits access to the refrigerant should a leak be suspected. To ensure good oil return to the compressor, it is important to pitch the horizontal suction line toward the compressor, approximately 1/2" for every 10' of line. Line Insulation Suction line requires insulation in order to prevent condensation from forming on the piping and to prevent heat gain caused by surrounding air. Generally 3/8" wall thickness of Armflex or equivalent is satisfactory. In severe application (hot, high humidity areas) greater thickness may be required. Apply the line insulation by sliding it on the sealed tuing before cutting and making connections. Liquid line does not necessarily need insulation, however, if they are exposed to high ambient temperatures (i.e. kitchen, boiler rooms, hot attics & rooftop surface), then, they should be insulated. Make sure to use the proper size tubing for the liquid line to prevent liquid refrigerant flashing to a vapor within the liquid line. Do not allow the vapor line and liquid line to touch together. This would cause an undesirable heat transfer resulting in capacity loss and increased power consumption. 7 8 Refrigerant Line Sizing Check the following table (Table 3) for correct suction and liquid line sizes for any combination of the unit size and the maximum refrigerant line length. Refrigerant Line Length (Ft) Unit Size 0 - 24 25 - 49 50 - 74 (Ton) Line Outside Diameter (In) Suction Liquid Suction Liquid Suction Liquid 1.5 3/4 3/8 3/4 3/8 7/8 1/2 2.0 3/4 3/8 3/4 3/8 7/8 1/2 2.5 3/4 3/8 3/4 3/8 7/8 1/2 Table 3:Refrigerant Line Sizing The factory charge is sufficient for 25 feet of standard liquid line. For longer or shorter liquid line lengths, adjust the charge as follows: 1/4" Line +/- 0.3 oz. Per foot 5/16" Line +/- 0.4 oz. Per foot 3/8" Line +/- 0.6 oz. Per foot 1/2" Line +/- 1.2 oz. Per foot. Vertical Separation between Indoor and Outdoor Units Maximum allowable vertical separations between indoor and outdoor units are illustrated in Figure 4-A and Figure 4-B. It's 70' when the indoor unit is below the outdoor unit (Figure 4-A), and 50' when the indoor unit is above the outdoor unit (Figure 4-B). To ensure good oil return to the compressor when the indoor unit is below the outdoor unit, suction line oil trap should be used as illustrated in Figure 4-A. Tubing Connections ! CAUTION - Use extreme caution in removing the caps from the suction and liquid line fittings, as there is pressure present. A fitting is on the liquid line to remove pressure. ! CAUTION - Heat Pumps are charged with refrigerant. Heat Pump liquid and suction valves are closed to contain the charge within the unit. Do not force the valve stem against the retaining ring. If the valve stem is backed out past the retaining ring, system pressure could force the valve stem out of the valve body and possibly cause personal injury. ! CAUTION - The piston is in the accessory bag. Don't forget to take it out and put into the indoor liquid pipe orifice. Instructions on the field tubing connections and valve opening procedure are as follow: SEER 13 13 13 3.0 7/8 3/8 1 1/8 3/8 1 1/8 1/2 13 1.Tubing should be cut square. Make sure it is round and free of burrs at the connecting ends. Clean the tubing to prevent contamination from entering the system. 2.Make sure that both refrigerant stop valves at the outdoor unit are closed. 3.Push the tubing into the fitting until it stops. This prevents flux from getting into the system. 4.Remove the cap and Schrader valve core from the service port to protect the valve seals. 5.Wrap a wet rag around the valve stub ...

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