Assessments - 2, GPA: 3.5
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Facilidade de uso
If a substantial adjustment is indicated, determine abnormal condition in system that is causing inaccurate readings, such as insufficient airflow across either or both coils. CAUTION: If it in den-rmim-d that the problem U ;n: o\er charged or undercharged unit’when operating in the heating mode, the refrigerant system should be evacuated and recharged by adding the exact amount of R-22 refrigerant as shown on the unit rating plate. A volumetric charging cylinder or ac-.urale scale should hr used. W her. operating in the cooling mode, the operating pressure temperature Tag may be used to adjust the charge. C. Indoor Airflow & Airflow Adjustments Model 542D and 542E units are equipped with direct-drive blower motors. All motors have a high- and low-speed connection except for 460-V motors which have only a highspeed connection. The system airflow for all units (except 460-V) can be changed, when necessary, by changing the blower motor speed connection from the factory setting to the unused speed connection. The factory setting is indicated on the unit wiring label. CAUTION: The recommended airflow is 400 to 450 ft3/ per each 12,000 Btuh of unit capacity. Inadequate airflow can cause unsatisfactory operation and performance. Certain unit/heater combinations can only be used with high speed blower operation. See electric heater information Table VI shows the air delivery performance of all units at various external static pressures. Determine the airflow for the system being installed as follows: 1. Start unit and measure static pressure in duct system at unit. -9- TABLE VI-AIR DELIVERY (Ft3/Min) AT INDICATED EXTERNAL STATIC PRESSURE & VOLTAGE* Model Blower Motor Speed Opera- ting Voltage Applica- tlont External Static Pressure—Inches wc 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 542E024 Low 208 Heating 880 835 790 740 690 ■ 630 : 565 470 Cooling 850 810 770 725.':' .: 675 : 615 550 465 ‘ - 230 Heating 965 925 880 835 780 : 720 '■655 ' 575'"‘i Cooling 940 900 855 810 755 700 635 560 High 208 Heating 1015 970 920 870 815 .■ 750 ;: 685 605 Cooling 985 940 890 840 785 - 730 665 : 585 .i 230 Heating 1070 1030 985 940 885 830 '■"£ 765 : : 680 Cooling 1040 1000 955 910 855 800 735 660 542E030 Low 208 Heating 995 965 930 890 845 785 705 590 Cooling 980 945 910 865 820 760 680 560 230 Heating 1070 1050 1025 995 960. 915 840 730 Cooling 1055 1030 1005 970 930 880 800 680 High 208 Heating 1165 1145 1125 1095 1065 1020 955 845 . Cooling 1150 1130 1105 1075 1035 980 900 770 230 Heating 1260 1245 1225 1200 1165 1125 1065 970 Cooling 1245 1225 1200 1170 1135 1080 1005 875 ' 542E036 Low 208 Heating 1280 1235 1185 1135 1080 1020 955 875 Cooling 1225 1185 1140 1095 1040 985 920 850 230 Heating 1485 1435 1380 1325 1265 1200 1115 1025 Cooling 1400 1350 1300 1250 1190 1125 1050 970 High 208 Heating 1685 1630 1575 1510 1440 1360 1275 1160 Cooling 1565 1510 1455 1395 1325 1250 1160 1045 230 Heating 1850 1785 1720 1650 1575 1490 1395 1280 Cooling 1670 1615 1560 1495 1425 1345 1250 1100 542E042 Low 208 Heating 1400 1360 1315 ...........1265 1205 1130 1015 — Cooling 1370 1330 1280 1230 1165 1085 95b — 230 Heating 1655 1610 1560 1505 1435 1360 1270 1140 Cooling 1615 1565 1510 1450 1380 1,305 1205 1050 High 208 Heating 1895 1840 1780 1715 1645 1570 1480 1365 Cooling 1825 1770 1710 1645 1570 1490 1395 1270 230 Heating 2125 ' 2065 2005 1935 1860 1775 1685 1570 Cooling 2030 1970 1905 1835 1760 1675 1575 1440 542E048 Low 208 Heating 1690 1635 1575 1510 1440 1360 1270 1140 Cooling 1650 1595 1535 1475 1405 1325 1230 1100 230 Heating 1905 1855 1800 1740 1675 1600 1510 1370 Cooling 1860 1810 1755 1690 1625 1545 1445 1290 High 208 Heating 2005 1955 1900 1845 1780 1705 1625 1510 Cooling 1955 1905 1850 1790 1725 1650 1560 1430 230 Heating 2270 2195 2120 2040 1955 1870 1765 1650 Cooling 2180 2110 2040 1960 1880 1785 1685 1570 . 460 Heating 2070 2000 1925 1845 1760 1665 1560 1425 Cooling 2000 1930 1855 1775 1690 1595 1490 1355 542E060 Low 208 Heating 1860 1850 1840 1825 1805 1770 1710 1575 Cooling 1840 1830 1820 1800 1765 1705 1600 — 230 Heating 2250 2205 2160 2110 2050 1990 1915 1830 Cooling 2180 2135 2085 2030 1970 1900 1815 1700 High 208 Heating 2355 2315 2270 2220 2165 2105 2035 1950 Cooling 2285 2240 2190 2135 2075 2005 1920 1800 230 Heating 2700 2625 2550 2465 2380 2285 2175 2055 Cooling 2550 2475 2395 2315 2220 2120 2005 1860 460 Heating 2290 2260 2225 2185 2140 2090 2025 1940 Cooling 2240 2205 2165 2115 2065 2000 1915 1770 542D060 Low 208 Heating 1840 1825 1805 1770 1710 1585 - — Cooling 1820 1800 1765 1705 1600 — — 230 Heating 2160 2110 2050 1990 1915 1830 1695 — Cooling 2085 2030 1970 1900 1815 1700 ... — High 208 Heating 2270 2225 2170 2105 2035 1950 1815 ■ Cooling 2190 2135 2075 2005 1920 1800 — — 230 Heating 2550 2465 2380 2285 2180 2055 1905 ...
Este manual também é adequado para os modelos :equipamento de bombagem - 542D060 (2.27 mb)