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_ Installation Instructions Combination Units I
Figure 7 Circulating Blower Performance Data - 4 Ton Units 208 Volts
NOTES:
1.
2.
3.
4.
5.
6.
7.
0
w
:£
o
==
uJ
t_
uJ
.J
z
w
X
w
l
&9
&8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
I
o _
1200 1300 1400
CHART
I
1500 1600 t700 t800 1900
CFM
t000
930
860
790
72O
650
580
510
440
370
300
2OOO
F-
0
F.-
0
Maximum motor Watts is 928 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
0
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
1851 750 952 960
1691 645 913 920
867 1513 546 871
822
777
CFM W CFM W
1567 649
1359 548
1778 620
1631 530
1716 518 774 1460 461
1587 456 725
TURNS/RPM CONVERSION TABLE
PULLEY TURNS 0 1 2 3 4 5
OPEN
RPM WITH.75 HP 950 910 870 825 780 730
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 00
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