Table 2:
Airflow data (CFM)
Models
Blower
motor speed
External static pressure (in. W.C.)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
B18B
High (5)
975
925
875
825
800
750
700
650
600
550
Medium high (4)
900
850
800
775
725
675
625
575
525
500
Medium (3)
825
775
725
700
650
600
550
500
450
400
Medium low (2)
650
600
550
500
425
-
-
-
-
-
Low (1)
450
-
-
-
-
-
-
-
-
-
B24C
High (5)
1150
1125
1100
1050
1025
975
950
900
875
850
Medium high (4)
1000
950
925
875
825
775
750
700
650
600
Medium (3)
775
725
675
625
575
525
450
400
-
-
Medium low (2)
675
600
550
500
425
-
-
-
-
-
Low (1)
525
450
-
-
-
-
-
-
-
-
B30D
High (5)
1150
1125
1075
1050
1025
975
950
925
875
850
Medium high (4)
1000
950
900
875
825
800
750
700
675
625
Medium (3)
775
725
700
650
600
550
500
450
400
-
Medium low (2)
650
600
550
500
450
400
-
-
-
-
Low (1)
575
525
475
400
-
-
-
-
-
-
B36D
High (5)
1500
1475
1450
1425
1425
1400
1375
1350
1325
-
Medium high (4)
1325
1300
1275
1250
1225
1200
1175
1150
1125
1100
Medium (3)
975
950
900
875
825
800
750
700
675
625
Medium low (2)
925
875
825
800
750
700
675
625
575
550
Low (1)
650
600
550
500
450
400
-
-
-
-
C36D
High (5)
1600
1575
1525
1500
1450
1425
1400
1350
1325
1275
Medium high (4)
1400
1375
1325
1275
1225
1200
1150
1100
1075
1025
Medium (3)
1100
1050
1000
950
900
850
800
725
675
625
Medium low (2)
950
900
825
775
725
650
600
550
475
425
Low (1)
725
650
575
525
450
375
-
-
-
-
C42F
High (5)
1525
1500
1450
1425
1375
1350
1300
1275
1225
1200
Medium high (4)
1375
1325
1300
1250
1200
1150
1125
1075
1025
975
Medium (3)
1050
1000
950
900
850
775
725
675
625
575
Medium low (2)
925
875
800
750
700
625
575
525
450
400
Low (1)
700
625
575
500
425
-
-
-
-
-
C48G
High (5)
1925
1900
1875
1850
1800
1775
1750
1725
1700
1675
Medium high (4)
1750
1700
1675
1650
1600
1575
1550
1500
1475
1450
Medium (3)
1400
1350
1300
1275
1225
1175
1125
1075
1050
1000
Medium low (2)
1200
1150
1100
1050
1000
925
875
825
775
725
Low (1)
925
875
800
750
700
625
575
500
450
375
D48G
High (5)
2050
2000
1975
1950
1900
1875
1850
1800
1775
1750
Medium high (4)
1850
1800
1775
1725
1700
1650
1625
1575
1550
1500
Medium (3)
1625
1600
1550
1500
1450
1425
1375
1325
1275
1250
Medium low (2)
1275
1200
1150
1100
1050
975
925
875
825
750
Low (1)
1000
925
875
800
750
675
600
550
475
400
C60H
High (5)
1925
1900
1875
1850
1825
1775
1750
1725
1700
1675
Medium high (4)
1750
1725
1675
1650
1625
1575
1550
1525
1475
1450
Medium (3)
1375
1350
1300
1250
1225
1175
1125
1100
1050
1000
Medium low (2)
1200
1150
1100
1050
1000
950
900
850
800
750
Low (1)
950
900
825
775
725
650
600
550
475
425
D60H
High (5)
1925
1900
1875
1825
1800
1775
1750
1700
1675
1650
Medium high (4)
1775
1750
1725
1675
1650
1600
1575
1525
1500
1450
Medium (3)
1450
1400
1325
1275
1225
1175
1125
1075
1025
975
Medium low (2)
1225
1175
1125
1050
1000
950
875
825
775
700
Low (1)
975
900
850
775
700
625
550
475
425
-
Continued on next page
Table 2:
Airflow data (CFM) (continued)
Notes:
1.
No electric heat installed
2.
Air handler units are tested to UL60335-2-40 standards up to 0.6 in. W.C. external static pressure.
3.
Dry coil conditions only; tested without filters
4.
For optimal performance, external static pressures of 0.2 in. W.C. to 0.5 in. W.C. are recommended. Heating applications are tested at 0.5 in. W.C. external static pressure.
5.
Airflow data shown is from testing performed at 230 V. These units use a standard ECM constant torque motor and there is minimal variation of airflow at other distribution
voltage values. The above data can be used for airflow at other distribution voltages.
Clearances
It is essential to provide the following clearances:
1.
Refrigerant piping and connections - minimum 12 in.
2.
Maintenance and servicing access - minimum 36 in. from the front of
the unit for blower motor or coil replacement
3.
Condensate drain lines routed to clear filter and panel access
4.
Filter removal - minimum 36 in.
5.
The supply air ductwork connected to this unit is designed for 1 in.
clearance for the first 18 in. of combustible materials if an electric heat
kit accessory is installed.
6.
A combustible floor base accessory is available for downflow applica-
tions of this unit, if required by local code.
External duct static
Measure the supply air static pressure. Record this positive number.
Measure the return air static pressure. Record this negative number.
Treat the negative number as a positive and add the two numbers
together to determine the total external system static pressure. If a filter
rack is installed on the return air end of the air handler or indoor coil
section, make sure to measure the return air duct static between the filter
and the indoor coil.
Figure 2:
Duct static measurements
Models
Blower
motor speed
External static pressure (in. W.C.)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
D60J
High (5)
2100
2075
2050
2025
2000
1975
1925
1900
1875
1850
Medium high (4)
1925
1900
1875
1825
1800
1775
1725
1700
1675
1650
Medium (3)
1750
1725
1675
1650
1600
1575
1525
1500
1450
1425
Medium low (2)
1350
1275
1225
1175
1125
1075
1025
975
925
875
Low (1)
1200
1150
1100
1025
975
925
850
800
750
675
Take measurements here if using
a filter rack.
Return air static must be taken
between the filter and indoor coil.
A1704-001
Table 3:
Electrical heat - minimum fan speed
Heater kit
models
1,2
Nominal
kW
at 240 V
Air handler models
B18B
B24C
B30D
B36D
C36D
C42F
C48G
D48G
C60H
D60H
D60J
8HK(0,1)6500206
2.4
Medium
Low (2)
Medium
(3)
Medium
High (4)
Medium
(3)
Medium
(3)
Medium
(3)
Medium
Low (2)
Medium
Low (2)
Medium
Low (2)
Medium
Low (2)
Medium
Low (2)
8HK(0,1)6500506
4.8
Medium
(3)
Medium
(3)
Medium
High (4)
Medium
(3)
Medium
(3)
Medium
(3)
Medium
Low (2)
Medium
Low (2)
Medium
Low (2)
Medium
Low (2)
Medium
Low (2)
8HK(0,1)6500806
7.7
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
(3)
Medium
(3)
Medium
(3)
Medium
(3)
Medium
Low (2)
8HK(0,1)6501006
8HK06501025
9.6
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
(3)
Medium
(3)
Medium
High (4)
Medium
(3)
Medium
Low (2)
8HK(1,2)6501506
8HK06501525
14.4
-
Medium
High (4)
High (5)
Medium
High (4)
Medium
High (4)
Medium
High (4)
Medium
(3)
Medium
(3)
Medium
High (4)
Medium
High (4)
Medium
(3)
8HK(1,2)6502006
8HK16502025
19.2
-
-
High (5)
Medium
High (4)
High (5)
High (5)
Medium
High (4)
Medium
(3)
Medium
High (4)
Medium
High (4)
Medium
(3)
8HK(1,2)6502506
8HK16502525
24
-
-
-
-
-
-
-
-
-
Medium
High (4)
Medium
(3)
1. (0,1) - 0 = no service disconnect or 1 = with service disconnect
2. (1,2) - 1 = with service disconnect, no breaker jumper bar or 2 = with service disconnect and breaker jumper bar
