Specifications
Table 31 -- Accessory/FlOP Static Pressure (in. wg)* -- 48/50PG20-28 Units
COMPONENT I 4,000
Economizer 0.02
Humidi-MiZer TM (20, 24)
Humidi-MiZer (28)
4,500
8.03
5,000 I 5,500
004 005
-- 0.10
CFM
6,000 I 6,500
006 0.87
017 0.25
-- 0.05
7,009
0.08
0.32
0.I3
7,500 8,000
0.09 0.10
0.40 0.47
0.21 0.29
COMPONENT I 8,500
Economizer 0.11
Humidi-MiZer (20, 24) 0.54
Humidi-MiZer (28) 0.38
LEGEND
FlOP -- Factory-Installed Option
9,909
8.12
8.60
8.44
CFM
9,500 I 10,009 19,500 I 11,900 11,500 I 12,OOO
013 015 0.I6 0.17 0.19 020
068 074 ....
0.5I 059 0.66 0.72 0.80 086
*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 blovcer rpm and watts
Table 32 -- Accessory/FlOP Electric Heat Static Pressure (in. wg) -- 50PG20-28 Units
UNIT
5OPG
20, 24,
28
Unit Voltages Cfm Nominal Heater
2081240 Size (kW)
4,800
5,000
6,000
7,000
208/240-3-80
8,000
9,000
I0,000
11,500
4,800
5.800
6,000
7,000
480-3-60 25
8,000
9,000
I0,000
11,500
4,800
5,000
6,000
7,000
575-3-60
8,000
9,000
I0,000
11,500
LEGEND
ELECTRIC HEATERS
Pressure Drop Nominal Heater
(in. wg) Size (kW)
001
0.01
0.02
0.03
0.04
0.05
006
009
0.01
0.01
0.02
0.03
50
0.04
0.05
006
009
0.01
0.01
0.02
0.03
0.04
0.05
006
009
Pressure Drop
(in. wg)
0.02
0.02
0.04
0.06
0.08
0.10
0.13
0.18
0.02
0.02
0.04
0.06
0.08
0.10
0.13
0.18
0.02
0.02
0.04
0.06
0.08
0.10
0.13
0.18
NOTES:
1. Heaters a_ _ted at240v, 480 v, and 600v.
Nominal Heater
Size (kW)
Pressure Drop
(in. wg)
0.03
0.04
0.06
0.08
0.12
0.15
0.20
0.27
0.03
0.04
0.06
0.08
0.12
0.15
0.20
0.27
0.03
0.04
0.06
0.08
0.12
0.15
0.20
0.27
FlOP -- Factory-Installed Option
2. The static pressure must be added to external static pressure. The sum and the evapo-
rator entering-a9 cfm shoutd then be used in conjunction with the Fan Performance
tame to determine blower rpm, bhp, and watts.
Table 33 -- Fan RPM At Motor Pulley Settings* -- 48PG20-28 Units
UNIT
48PG
20 and 24
(230 and 460 volt)
20 and 24
(575 volt)
28
(all voltages)
*Approximate fan rpm shown.
Vertical
Horizontal
Vertical
Horizontal
Vertical
Horizontal
MOTOR PULLEY TURNS OPEN
DRIVE
O I/2 1 11/2 2 21_ 3 3t/2 4 41/2 5 51_ 6
Low 685 706 727 749 770 791 812 833 854 876 897 918 939
Mid-Low 949 970 992 1013 1035 I056 I078 1099 1120 1142 1163 1185 1206
Mid-High 941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I176
High 1014 1038 1061 1085 1108 1132 I156 I179 1203 1226 1250 1273 1297
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 I062 I089 1117 1144 1172 1199 1227
Mid-High II13 I138 1163 1188 1213 1238 1264 1289 1314 1339 1364 1389 I414
High 1096 1116 1137 1157 1177 1197 I218 I238 1258 1278 1299 1319 1339
Low 751 768 785 802 819 836 853 869 886 903 920 937 954
Mid-Low 949 970 992 1013 1035 I056 I078 1099 1120 1142 1163 1185 1206
Mid-High 941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I176
High 1014 1038 1061 1085 1108 1132 I156 I179 1203 1226 1250 1273 1297
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 II13 I138 1163 1188 1213 1238 1264 1289 1314 1339 1364 1389 I414
High
Low
Mid-Low
Mid-High
High
Low
Mid-Low
Mid-High
High
1096 1116 1137 1157 1177 1197 I218 I238 1258 1278 1299 1319 1339
687 703 718 734 749 765 780 796 811 827 842 858 873
805 822 839 856 872 889 906 923 940 957 973 990 1007
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I176
1014 1038 1061 1085 1108 1132 I156 I179 1203 1226 1250 1273 1297
687 703 718 734 748 765 780 796 811 827 842 858 873
805 822 839 856 872 889 906 923 940 957 973 990 1007
941 961 980 1000 1019 1039 1059 1078 1098 1117 1137 1156 I176
1014 1038 1061 1085 1108 1132 I156 I179 1203 1226 1250 1273 1297
NOTE: Factory pulley speed se_ing is at 3 turns open
34