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COMPONENT
4,000 4,500 5,000 5,500 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 10,500
EconoMi$er IV
0.02
0.03
LEGEND
FIOP — Factory-Installed Option
*The static pressure must be added to the external static pressure. The sum and the evaporator entering-air cfm should then be
used in conjunction with the Fan Performance tables to determine blower rpm and watts.
581A
UNIT
SIZE
Low Range Vertical
210
High Range Vertical
(208/230 and
Low Range Horizontal
460 volt)
High Range Horizontal
Low Range Vertical
High Range Vertical
210
(575 volt)
Low Range Horizontal
High Range Horizontal
Low Range Vertical
240
High Range Vertical
(208/230 and
Low Range Horizontal
460 volt)
High Range Horizontal
Low Range Vertical
High Range Vertical
240
(575 volt)
Low Range Horizontal
High Range Horizontal
Low Range Vertical
High Range Vertical
300
(all voltages)
Low Range Horizontal
High Range Horizontal
*Approximate fan rpm shown.
XII. OPTIONAL ECONOMI$ER IV
See Fig. 23 for EconoMi$er IV component locations. The
optional EconoMi$er IV comes from the factory fully wired
and assembled. No field wiring or assembly is required for
standard outdoor dry bulb changeover operation. Field wir-
ing of accessory sensors is required for different operational
modes.
A. EconoMi$er IV Standard Sensors
Outdoor Air Temperature (OAT) Sensor
The outdoor air temperature sensor (HH57AC074) is a 10 to
20 mA device used to measure the outdoor-air temperature.
The outdoor-air temperature is used to determine when the
EconoMi$er IV can be used for free cooling. The sensor is
factory-installed on the EconoMi$er IV in the outdoor air-
stream. See Fig. 23. The operating range of temperature
measurement is 40 to 100 F.
Supply-Air Temperature (SAT) Sensor
The supply-air temperature sensor is a 3 K thermistor
located at the outlet of the indoor fan. See Fig. 24. This sen-
sor is factory installed. The operating range of temperature
measurement is 0° to 158 F.
The temperature sensor is a short probe with blue wires
running to it.
Outdoor Air Lockout Sensor
The EconoMi$er IV is equipped with an ambient tempera-
ture lockout switch located in the outdoor airstream which is
used to lock out the compressors below a 42 F ambient
temperature.
Table 26 — Accessory/FIOP Static Pressure (in. wg)*
0.04
0.05
0.06
0.07
Table 27 — Fan Rpm at Motor Pulley Settings*
DRIVE
0
1
/
647
667
897
917
896
924
1113
1138
810
832
873
893
863
886
1042
1062
949
970
941
961
1113
1138
1096
1116
949
970
941
961
1113
1138
1096
1116
941
961
1014
1038
941
961
1014
1038
CFM
0.08
0.09
0.10
0.11
0.12
MOTOR PULLEY TURNS OPEN
1
1
1
/
2
2
1
/
2
2
2
687
707
727
747
937
958
978
998
951
979
1006
1034
1163
1188
1213
1238
854
876
897
919
912
932
951
971
909
933
956
979
1083
1103
1123
1143
992
1013
1035
1056
980
1000
1019
1039
1163
1188
1213
1238
1137
1157
1177
1197
992
1013
1035
1056
980
1000
1019
1039
1163
1188
1213
1238
1137
1157
1177
1197
980
1000
1019
1039
1061
1085
1108
1132
980
1000
1019
1039
1061
1085
1108
1132
B. EconoMi$er IV Controller Wiring and Operational Modes
Determine the EconoMi$er IV control mode before set up of the
control. Some modes of operation may require different sensors.
Refer to Table 28. The EconoMi$er IV is supplied from the
factory with a supply-air temperature sensor and an
outdoor air temperature sensor. This allows for operation of
the EconoMi$er IV with outdoor air dry bulb changeover
control. Additional accessories can be added to allow for dif-
ferent types of changeover control and operation of the
EconoMi$er IV and unit.
Outdoor Dry Bulb Changeover
The standard controller is shipped from the factory config-
ured for outdoor dry bulb changeover control. The outdoor
air and supply-air temperature sensors are included as
standard. For this control mode, the outdoor temperature is
compared to an adjustable set point selected on the control.
If the outdoor-air temperature is above the set point, the
EconoMi$er IV will adjust the outdoor-air dampers to mini-
mum position. If the outdoor-air temperature is below the set
point, the position of the outdoor-air dampers will be con-
trolled to provide free cooling using outdoor air. When in this
mode, the LED next to the free cooling set point potentiome-
ter will be on. The changeover temperature set point is con-
trolled by the free cooling set point potentiometer located on
the control. The scale on the potentiometer is A, B, C, and D.
See Fig. 25 for the corresponding temperature changeover
values.
—
30
—
11,000 11,500 12,000
0.13
0.15
0.16
0.17
3
3
1
/
4
4
1
/
2
2
767
786
806
826
846
1018
1038
1058
1079
1099
1062
1089
1117
1144
1172
1264
1289
1314
1339
1364
941
963
985
1007
1028
991
1010
1030
1049
1069
1002
1025
1048
1072
1095
1164
1184
1204
1224
1245
1078
1099
1120
1142
1163
1059
1078
1098
1117
1137
1264
1289
1314
1339
1364
1218
1238
1258
1278
1299
1078
1099
1120
1142
1163
1059
1078
1098
1117
1137
1264
1289
1314
1339
1364
1218
1238
1258
1278
1299
1059
1078
1098
1117
1137
1156
1179
1203
1226
1250
1059
1078
1098
1117
1137
1156
1179
1203
1226
1250
0.19
0.20
5
5
1
/
6
2
866
886
1119
1139
1199
1227
1389
1414
1050
1072
1088
1108
1118
1141
1265
1285
1185
1206
1156
1176
1389
1414
1319
1339
1185
1206
1156
1176
1389
1414
1319
1339
1156
1176
1273
1297
1156
1176
1273
1297
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