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Hersteller: York Dateigröße: 788.1 kb Dateiname: Unterrichtssprache:

Circuit Amps Max. Fuse Size Power Suoplv RLA LRA Power Factor Power Suoplv Qty. FLA (Each) E3FB 090A 25 200/230-3-60 25.6 180.0 0.94 @ 208V 208/230-1-60 1 3.03 35.1 60 0.84 @ 230V 46 460-3-60 13.5 95.0 0.86 460-1-60 1 1.6 18.4 30 50 308/415-3-50 13.5 85.0 0.86 @ 380V 380/415-1-50 1 1.6 18.4 30 0.79 @ 415V E2FB 120A 25 208/230-3-60 42.0 239.0 0.91 @ 208V 208/230-1-60 2 2.7 51.8 70 0.82 @ 230V 46 460-3-60 19.2 125.0 0.82 460-1-60 2 1.6 24.7 35 50 380/415-3-50 19.6 118.0 0.87 @ 380V 380/415-/-50 2 1.6 25.2 35 0.80 @ 415V 1Based on three, 60°C insulated copper conductors in steel conduit. 2Based on a 3% voltage drop. Unitary Products Group 5 035-15410-002-B-0404 CLEARANCES Overhead (Top)1 120" Front (Piping and Access Panels) 30" Left Side 24" Right Side 24" Rear K- 24" Bottom 2 0" 1Units must be installed outdoors. Overhanging structures or shrubs should not obstruct air discharge outlet. 2 Adequate snow clearance must be provided if winter operation is expected. All dimensions are in inches. They are subject to change without notice. Certified dimensions will be provided upon request. CONTROL BOX ACCESS LIQUID CONN * AIR ON 3 SIDES FIG. 4 - UNIT DIMENSIONS AND CLEARANCES - 7-1/2 & 10 TON 6 Unitary Products Group 035-15410-002-B-0404 Use hard drawn coppertubing where no appreciable amount of bending around pipes or other obstructions is necessary. Use long radius ells wherever possible with one exception - small radius ells forthe traps in all vapor risers. If soft copper is used, care should be taken to avoid sharp bends which may cause a restriction. Pack fiber glass insulation and a sealing material such as Permagum around refrigerant lines where they penetrate a wall to reduce vibration and to retain some flexibility. Support all refrigerant lines at minimum intervals with suitable hangers, brackets or clamps. Braze all copper to copper joints with Silfos-5 or equivalent brazing material. Do not use soft solder. Insulate all vapor lines with a minimum of 1/2" ARMA-FLEXor equal. Liquid lines exposed to direct sunlight and/or high temperatures must also be insulated. Neversoldervaporand liquid lines together. They can be taped together for convenience and support purposes, but they must be completely insulated from each other. Never exceed the maximum line length listed in Table 1. LINE SIZING The following factors should be considered when locating the indoor and outdoor units and when sizing the refrigerant Tines for a split heat pump system. Refer to Figure 5. TABLE 4 - LIQUID LINES System Model Refrigerant Flow Rate,1 (Lbs/Min) Type “L” Copper Tubing, (In. OD) Pressure Drop Friction,2 (PSI/100 Ft) Vertical Rise (PSI/Ft) EFB090/FEH090 22.5 5/8 3.5 0.5 EFB120/FEH120 30.0 5/8 5.8 0.5 Based on Refrigerant-22 at the nominal cooling capacity of the system, a liquid temperature of105°Fandavaportemperatureof40°F. Since refrigerantflowrateswill bealittle lower at the nominal heating capacityofeachsystem, liquid linefriction lossshould always be based on cooling operation. 2 These friction losses do not include any allowance for fittings. 3Thetotal pressuredropofthe liquid lineforbothfrictionand vertical rise must not exceed 40 PSI. If the pressure drop exceeds 40 PSI, the liquid refrigerant could flash before it reaches the expansionvalve. This flashing will not onlycause erraticvalve operation and poor system performance, but could also damage the expansion valve. THE LIQUID LINE - The vertical rise should never exceed 50 feet because liquid refrigerantwill lose 0.5 psi of static head for each vertical foot. The total pressure loss for a field-installed liquid line should never exceed 40 psi because the liquid refrigerant could flash before it reaches the expansion valve. This flashing will not only cause erratic valve operation and poor system performance, but could also damage the expansion valve. Total pressure loss includes the static head loss explained above plus the friction losses due to the length ofthe line (Table 4) and number of fittings in the line. When the indoor unit is above the outdoor unit, the friction loss throughthe 1-1/8" OD vapor riserwill be more ofa limiting factor than the loss of static head in the liquid riser. See Example #3 and #4 for the VAPOR LINE. THE VAPOR LINE - A vapor line should not only be sized for a friction loss of 3 psi (2°F) but also forthe proper return of oil to the compressor during both the cooling and heating cycles. Friction loss should always be based on cooling operation because refrigerant flow rates will be greater during the cooling cycle than during the heating cycle. (ii (2) 5/8" OO LIQUID LINE N INDOOR -¿J r° INDOOR UNIT S UNIT -B COOLING OUTDOOR _mi_ 5/8" OO LIQUID LINE HEATING OUTDOOR _uaii (4) <31 A = 1-3®" OD Vapor Line B = 1-1/8" OD Vapor Line C = Intermediate Trap - When section Ire riser is 30 ft or more in length...

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