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I Combination Units Installation InstructionsI
Figure 8 Circulating Blower Performance Data - 4 Ton Units 230/460/575 Volts
O
NOTES:
1.
2.
3.
4.
5.
6.
7.
09
W
0
==
uJ
t_
09
09
uJ
o=
09
.J
z
w
X
w
f
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
f200
CHART
_F M Standard Cooling Operating Range
I URN _,,,_,_.
_ 4 TU ...... _: ...............
I I
I I
71 T : - i b_S
I
1000
930
86O
79O
72O
650
580
510
440
370
300
1300 1400 1500 1600 1700 1800 1900 2000
CFM
09
I==
t_
0
0
5;
Maximum motor Watts is 962 Watts.
Airflow based on dry coil, horizontal flow, with filters.
For downflow SCFM, use a .15 static drop.
Pulley turns refer to turns out. I.E. 0 turns is a narrower sheave than 5 turns.
For applications requiring operation in shaded areas, contact the factory.
Maximum blower wheel speed is 1400 RPM.
The blower speed MUST be set to give the correct air temperature rise through the unit as marked on the Rating Plate or
Technical Support Manual.
TABLE
NO.
OF
TURNS
O
1
2
3
4
5
EXTERNAL STATIC PRESSURE IN INCHES W.C.
.2 .4 .6 .8 1.0
WIlL WIlL WIlL WIlL
W RPM CFM RPM CFM W RPM RPM CFM W
1873 800 959 965
1706 698 919 925
870 1512 600 874
825 1317 519 829
778
CFM W CFM W
1588 708
1381 609
1788 673
1646 593
1727 574 776 1469 520
1593 522 728
TURNS/RPM CONVERSION TABLE
PULLEY TURNS 0 1 2 3 4 5
OPEN
RPM WITH.75 HP 960 920 875 825 780 730
STD PULLEY
WHL
RPM
W=Wa_s
UNIT FACTORY SETTING TURNS OPEN
PGB048D .75 HP STD PULLEY ...... 3.5
PGB048F .75 HP STD PULLEY ....... 2
513 01 1002 O0
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