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527929-BIM-F-0911
Table 10: Electric Heat Minimum Supply Air
Size
(Tons)
024
(2.0)
030
(2.5)
036
(3.0)
042
(3.5)
048
(4.0)
060
(5.0)
Table 11: Indoor Blower Specifications
Size
HP
RPM
(Tons)
024
1/2
Variable
(2.0)
030
1/2
Variable
(2.5)
036
3/4
Variable
(3.0)
042
3/4
Variable
(3.5)
048
3/4
Variable
(4.0)
060
1
Variable
(5.0)
Table 12: Electric Heat Multipliers
Voltage
Nominal
240
480
1. Electric heaters are rated at nominal voltage. Use this table to determine the electric heat
capacity for heaters applied at lower voltages.
Blower Speed Selection
The variable speed blowers are designed to deliver constant
CFM regardless of the external static pressure (ESP) in the
ductwork. Therefore, if too many supply registers are closed, a
filter becomes clogged, or there is a restriction in the ductwork,
the motor will automatically operate at a higher speed to
compensate for the higher ESP. This may result in a higher
operating sound level.
These units have variable speed motors that automatically adjust
to provide constant CFM from 0.2" to 0.6" w.c. static pressure.
From 0.6" to 1.0" static pressure, CFM is reduced by 2% per 0.1"
20
Voltage
3.8/5.0
208/230-1-60
720
208/230-1-60
1000
208/230-3-60
1000
460-3-60
1000
208/230-1-60
1080
208/230-3-60
1080
460-3-60
1080
208/230-1-60
-
208/230-3-60
-
460-3-60
-
208/230-1-60
-
208/230-3-60
-
460-3-60
-
208/230-1-60
-
208/230-3-60
-
460-3-60
-
Motor
Eff.
SF
Frame
0.8
1.0
48
0.8
1.0
48
0.8
1.0
48
0.8
1.0
48
0.8
1.0
48
0.8
1.0
48
Applied
208
230
460
Minimum Supply Air (CFM)
Heater kW
5.6/7.5
7.5/10.0
11.3/15.0
720
720
-
1000
1000
1000
1000
1000
1000
1000
1000
1000
1080
1080
1080
1080
1080
1080
1080
1080
1080
-
1400
1400
-
1400
1400
-
1400
1400
-
1440
1440
-
1440
1440
-
1440
1440
-
1900
1900
-
1900
1900
-
1900
1900
1
kW Capacity Multipliers
0.75
0.92
0.92
increase in static. Operation on duct systems with greater than
1.0" w.c. external static pressure is not recommended.
To Set Cooling CFM:
Refer to Tables 7 and 8 for the possible high speed cooling and
heat pump CFM selections.
Find the recommended system airflow for the unit model.
Set "COOL" and "ADJ" Jumpers on the CFM selection board as
indicated in Tables 7, 8 and Figure 9.
NOTE: CFM indicator light flashes once for every 100 CFM
(i.e., 12 flashes = 1200 CFM).
15.0/20.0
18.8/25.0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1440
1440
1440
1440
1440
1440
1900
1900
1900
1900
1900
1900
Johnson Controls Unitary Products
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