34
Table 31 — Accessory/FIOP Static Pressure (in. wg)* — 48/50PG20-28 Units
LEGEND
*The static pressure must be added to the external static pressure. The sum and the evap-
orator entering-air cfm should then be used in conjunction with the Fan Performance
tables to determine blower rpm and watts.
Table 32 — Accessory/FIOP Electric Heat Static Pressure (in. wg) — 50PG20-28 Units
LEGEND
NOTES:
1. Heaters are rated at 240 v, 480 v, and 600 v.
2. The static pressure must be added to external static pressure. The sum and the evapo-
rator entering-air cfm should then be used in conjunction with the Fan Performance
table to determine blower rpm, bhp, and watts.
Table 33 — Fan RPM At Motor Pulley Settings* — 48PG20-28 Units
*Approximate fan rpm shown.
NOTE: Factory pulley speed setting is at 3 turns open.
COMPONENT
CFM
4,000
4,500
5,000
5,500
6,000
6,500
7,000
7,500
8,000
Economizer
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
Humidi-MiZer™ (20, 24)
—
—
—
0.10
0.17
0.25
0.32
0.40
0.47
Humidi-MiZer (28)
—
—
—
—
—
0.05
0.13
0.21
0.29
COMPONENT
CFM
8,500
9,000
9,500
10,000
10,500
11,000
11,500
12,000
Economizer
0.11
0.12
0.13
0.15
0.16
0.17
0.19
0.20
Humidi-MiZer (20, 24)
0.54
0.60
0.68
0.74
—
—
—
—
Humidi-MiZer (28)
0.38
0.44
0.51
0.59
0.66
0.72
0.80
0.86
FIOP
—
Factory-Installed Option
UNIT
50PG
ELECTRIC HEATERS
Unit Voltages
Cfm
Nominal Heater
Size (kW)
Pressure Drop
(in. wg)
Nominal Heater
Size (kW)
Pressure Drop
(in. wg)
Nominal Heater
Size (kW)
Pressure Drop
(in. wg)
208/240
20, 24,
28
208/240-3-60
4,800
25
0.01
50
0.02
75
0.03
5,000
0.01
0.02
0.04
6,000
0.02
0.04
0.06
7,000
0.03
0.06
0.08
8,000
0.04
0.08
0.12
9,000
0.05
0.10
0.15
10,000
0.06
0.13
0.20
11,500
0.09
0.18
0.27
480-3-60
4,800
0.01
0.02
0.03
5,000
0.01
0.02
0.04
6,000
0.02
0.04
0.06
7,000
0.03
0.06
0.08
8,000
0.04
0.08
0.12
9,000
0.05
0.10
0.15
10,000
0.06
0.13
0.20
11,500
0.09
0.18
0.27
575-3-60
4,800
0.01
0.02
0.03
5,000
0.01
0.02
0.04
6,000
0.02
0.04
0.06
7,000
0.03
0.06
0.08
8,000
0.04
0.08
0.12
9,000
0.05
0.10
0.15
10,000
0.06
0.13
0.20
11,500
0.09
0.18
0.27
FIOP
—
Factory-Installed Option
UNIT
48PG
DRIVE
MOTOR PULLEY TURNS OPEN
0
1
/
2
1
1
1
/
2
2
2
1
/
2
3
3
1
/
2
4
4
1
/
2
5
5
1
/
2
6
20 and 24
(230 and 460 volt)
Vertical
Low
685
706
727
749
770
791
812
833
854
876
897
918
939
Mid-Low
949
970
992
1013
1035
1056
1078
1099
1120
1142
1163
1185
1206
Mid-High
941
961
980
1000
1019
1039
1059
1078
1098
1117
1137
1156
1176
High
1014
1038
1061
1085
1108
1132
1156
1179
1203
1226
1250
1273
1297
Horizontal
Low
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
Mid-Low
896
924
951
979
1006
1034
1062
1089
1117
1144
1172
1199
1227
Mid-High
1113
1138
1163
1188
1213
1238
1264
1289
1314
1339
1364
1389
1414
High
1096
1116
1137
1157
1177
1197
1218
1238
1258
1278
1299
1319
1339
20 and 24
(575 volt)
Vertical
Low
751
768
785
802
819
836
853
869
886
903
920
937
954
Mid-Low
949
970
992
1013
1035
1056
1078
1099
1120
1142
1163
1185
1206
Mid-High
941
961
980
1000
1019
1039
1059
1078
1098
1117
1137
1156
1176
High
1014
1038
1061
1085
1108
1132
1156
1179
1203
1226
1250
1273
1297
Horizontal
Low
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
Mid-Low
873
893
912
932
951
971
991
1010
1030
1049
1069
1088
1108
Mid-High
1113
1138
1163
1188
1213
1238
1264
1289
1314
1339
1364
1389
1414
High
1096
1116
1137
1157
1177
1197
1218
1238
1258
1278
1299
1319
1339
28
(all voltages)
Vertical
Low
687
703
718
734
749
765
780
796
811
827
842
858
873
Mid-Low
805
822
839
856
872
889
906
923
940
957
973
990
1007
Mid-High
941
961
980
1000
1019
1039
1059
1078
1098
1117
1137
1156
1176
High
1014
1038
1061
1085
1108
1132
1156
1179
1203
1226
1250
1273
1297
Horizontal
Low
687
703
718
734
749
765
780
796
811
827
842
858
873
Mid-Low
805
822
839
856
872
889
906
923
940
957
973
990
1007
Mid-High
941
961
980
1000
1019
1039
1059
1078
1098
1117
1137
1156
1176
High
1014
1038
1061
1085
1108
1132
1156
1179
1203
1226
1250
1273
1297
Summary of Contents for 48PG24
Page 68: ...68 Fig 14 Low Voltage Control Schematic 48PG20 28 Units without Humidi MiZer System a48 7627...
Page 69: ...69 Fig 15 Low Voltage Control Schematic 48PG20 28 Units with Humidi MiZer System a48 8227...
Page 70: ...70 Fig 16 Low Voltage Control Schematic 50PG20 28 Units without Humidi MiZer System a48 7778...
Page 71: ...71 Fig 17 Low Voltage Control Schematic 50PG20 28 Units with Humidi MiZer System a50 8101...
Page 72: ...72 Fig 18 Power Schematic Units without Humidi MiZer System a48 7628...
Page 73: ...73 Fig 19 Power Schematic Units with Humidi MiZer System a48 8228...
Page 74: ...74 Fig 20 Component Arrangement Units without Humidi MiZer System a48 8229...
Page 75: ...75 Fig 21 Component Arrangement Units with Humidi MiZer System a48 8230...
Page 105: ......