Installation Operation Maintenance

InstallationTo increase airflowLoosen variable sheave set screwand turn sheave clockwise.To decrease airflowLoosen variable sheave set screwand turn sheave counter-clockwise.To adjust beltThe fan belts must be inspectedperiodically to assure proper unitoperation. Replacement isnecessary if the belts appear frayedor worn.Units with dual belts require amatched set of belts to ensure equalbelt length.When removing or installing thenew belts, do not stretch them overthe sheaves. Loosen the belts usingthe belt tension adjustment bolts onthe motor mounting base.Once the new belts are installed,adjust the belt tension.Table 8 - Motor sheave / Fan speedUnit6 turnsOpen5 turnsOpen4 turnsOpenFan speed (RPM)Standard drive & motorTSD/TSH 060 N/A 898 967 1036 1105 1174 1243TSD/TSH 072 N/A 698 751 806 859 913 967TSD/TSH 090 N/A 752 806 860 914 968 1020TSD/TSH 102 N/A 688 737 786 835 885 934TSD/TSH 120 N/A 782 838 894 950 1006 1062YSD/YSH 060 N/A 1036 1105 1174 1243 1312 1381YSD/YSH 072 N/A 806 860 913 968 1022 1074YSD/YSH 090 859 913 967 1021 1075 1129 N/AYSD/YSH 102 786 836 885 934 982 1032 N/AYSD/YSH 120 894 950 1006 1062 1118 1174 N/AWSD/WSH 060 N/A 898 967 1036 1105 1174 1243WSD/WSH 072 N/A 698 751 806 859 913 967WSD/WSH 090 N/A 752 806 860 914 968 1020Unit6 turnsOpen5 turnsOpen4 turnsOpen3 turnsOpenFan speed (RPM)Oversized drive & motorTSD/TSH 060 N/A 1243 1311 1379 1450 1515 1588TSD/TSH 072 N/A 967 1021 1075 1128 1183 1235TSD/TSH 090 1112 1182 1252 1322 1392 1460 N/ATSD/TSH 102 N/A 971 1041 1111 1181 1251 1321TSD/TSH 120 1062 1118 1174 1229 1285 1341 N/AYSD/YSH 060 - - - - - - -YSD/YSH 072 N/A 967 1021 1075 1128 1183 1235YSD/YSH 090 1112 1182 1252 1322 1392 1460 N/AYSD/YSH 102 N/A 971 1041 1111 1181 1251 1321YSD/YSH 120 1062 1118 1174 1229 1285 1341 N/AWSD/WSH 060 N/A 1243 1311 1379 1450 1515 1588WSD/WSH 072 N/A 967 1021 1075 1128 1183 1235WSD/WSH 090 1112 1182 1252 1322 1392 1460 N/A3 turnsOpen2 turnsOpen2 turnsOpen1 turnsOpen1 turnsOpenClosedClosedRT-SVX20B-E415