American Standard 2A7A3018-060A Installer's Manual
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American Standard 2A7A3018-060A, © 2009 American Standard Heating & Air Conditioning Since the manufacturer has a policy of continuous product and product data improvement, it reserves the right to change design and specifications without notice. 11-AC18D1-4 These instructions do not cover all variations in systems nor provide for every possible contingency to be met in connection with installation. All phases of this installa- tion must comply with NATIONAL, STATE AND LOCAL CODES. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter sho
American Standard 2A7A3018-060A, PAGE 2 Pub. No. 11-AC18D1-4 INSTALLER'S GUIDE 7. If outdoor unit is mounted above the air handler, maximum lift should not exceed sixty (60) feet (suction line). If air handler is mounted above condensing unit, maximum lift should not exceed sixty (60) feet (liquid line). 8. Locate and install indoor coil or air handler in accordance with instruction included with that unit. NOTE: Refer to “Refrigerant Piping Software” Pub. No. 32-3312-0*, and “Refrigerant Piping Manual” Pub. No. 32-3009-0* (the position of the * denotes latest revision number). C. INSTALLING REFRIGERANT LINES ▲ C A U TI O N: If using existing refriger
American Standard 2A7A3018-060A, Pub. No. 11-AC18D1-4 PAGE 3 INSTALLER'S GUIDE 3. Cut and fit tubing, minimizing the use of sharp 90° bends. 4. Insulate the entire gas line and its fittings. 5. Do NOT allow uninsulated liquid line to come in direct contact with bare gas line. 6. Precautions should be taken to avoid heat damage to the pressure tap valve core during brazing. It is recom- mended that the pressure tap port valve core be removed and a wet rag wrapped around the valve body. NOTICE: Use care to make sure that no moi
American Standard 2A7A3018-060A, PAGE 4 Pub. No. 11-AC18D1-4 INSTALLER'S GUIDE 11. The gas valve can now be opened. For a ball type gas valve, open the gas valve by removing the shut-off valve cap and turning the valve stem 1/4 turn counterclockwise, using 1/4" Open End or Adjustable wrench. See Figure 4. For brass gas line service valve opening, follow 9 and 10 above. See Figure 5. 12. The gas valve is now open for refrigerant flow. Replace valve stem cap to prevent leaks. Again, these caps MUST BE REPLACED to prevent leaks. Replace valve stem and pres- sure tap cap finger tight, then tighten an additional 1/6 turn. See Figure 4. If refrigerant lines are longer than 15 fee
American Standard 2A7A3018-060A, Pub. No. 11-AC18D1-4 PAGE 5 INSTALLER'S GUIDE TYPICAL FIELD WIRING DIAGRAMS Notes: 1. Be sure power supply agrees with equipment nameplate. 2. Power wiring and grounding of equipment must comply with local codes. 3. Low voltage wiring to be No. 18 AWG minimum conductor. 4. ODT-B must be set lower than ODT-A. 5. If outdoor thermostats (ODT) are not used, connect W1 to W2 and W3. 6. N/A to programmable thermostat. LEGEND FACTORY WIRING FIELD WIRING
PAGE 6 Pub. No. 11-AC18D1-4 INSTALLER'S GUIDE R-22 SUBCOOLING CHARGING TABLE LIQUID TEMP. (°F) DESIGN SUBCOOLING VALUES (°F) 8101214 LIQUID LINE PRESSURE (psi) 45 89 93 96 100 50 98 102 105 109 55 107 111 115 119 60 117 121 126 130 65 128 132 137 141 70 139 144 148 153 75 151 156 161 166 80 163 168 174 179 85 176 182 187 193 90 190 196 202 208 95 205 211 217
Pub. No. 11-AC18D1-4 PAGE 7 INSTALLER'S GUIDE From Dwg. 21D152862 Rev. 18 2A7A3 OUTLINE DRAWING NOTE: ALL DIMENSIONS ARE IN MM (INCHES). MODELS BASE FIG. A B C D E F G H J K 2A7A3018A 2 2 651 (25-5/8) 724 (28-1/2) 651 (25-5/8) 5/8 1/4 127 (5) 57 (2-1/4) 180 (7-1/8) 44 (1-3/4) 457 (18) 2A7A3024A 2 2 832 (32-3/4) 724 (28-1/2) 651 (25-5/8) 3/4 5/16 137 (5-3/8) 65 (2-
American Standard 2A7A3018-060A, Pub. No. 11-AC18D1-4 02/09 INSTALLER'S GUIDE Technical Literature - Printed in U.S.A. American Standard Heating & Air Conditioning Troup Highway Tyler, TX 75707 8. Supply registers and return grilles open and unobstructed ................................................... [ ] 9. Return air filter installed .................................................. [ ] 10. Thermostat thermometer is accurate. Check against a reliable thermometer. Adjust per instructions with thermostat ........................... [ ] 11. Is correct speed tap being used? (Indoor blower motor)...................................................... [ ] 12. Operate complete system in each mode to insure safe
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