15
* The above airflow data for reference only.
●
The air distribution system has the greatest effect on airflow. The duct system is totally controlled by the contractor. For this
reason, the contractor should use only industry-recognized procedures.
●
Heat pump systems require a specified airflow. Each ton of cooling requires between 350 and 450 cubic feets of air per minute
(CFM), or 400 CFM nominally.
●
Duct design and construction should be carefully done. System performance can be lowered dramatically through bad
planning or workmanship.
●
Air supply diffusers must be selected and located carefully. They must be sized and positoined to deliver treated air along the
perimerter of the space. If they are too small for their intended airflow, they become noisy. If they are not located properly, they
cause drafts. Reture air grilles must be properly sized to carry air back to the blower. If they are too small, they also cause
noise.
●
The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures a
comfortable living space.
●
An air velocity meter or airflow hood can give a reading of system CFM.
●
When installation, installer should select the air speed according to the actual setting static pressure. Please refer to the
Table
7-1
AIRFLOW PERFORMANCE DATA.
* In any stituation , the airflow of the unit should be in the range of 80% to 130% of 400CFM/Ton.
Table 7-2 Duct Application(230v)
0[0] 0.1[.02]
0.2[.05]
0.3[.07]
0.4[.10] 0.5[.12] 0.6[.15] 0.7[.17]
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
Motor
Speed
Model
Number
48
Low
Middle
High
24
Low
Middle
High
External Static Pressure-Inches W.C.[kPa]
CFM(L/S)(Watts)
60
Low
Middle
High
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
36
Low
Middle
High
974(459)
1312(619) 1280(604) 1243(586) 1197(565) 1143(539)
770 817 863 902 943
455 442 423 402 380
1.98 1.92 1.85 1.76 1.67
1376(649) 1323(624) 1257(593) 1176(554)
1082(510)
919 951 983 1011
1039
494 470 444
418
388
2.17 2.07 1.97
1.87
1.75
1451(684) 1372(647) 1279(603)
1178(556) 1041(491)
1005 1028 1050
1069 1089
563 533 502
469 434
2.5 2.38
2.26
2.14
2.0
509 591 671 737
195 191 187 183
0.85 0.83 0.81 0.79
812 866 911
949
271 261 251
240
1.18 1.14 1.1 1.06
960
993 1023
328
314 299
1.47
1.41 1.36
847(399)
800 (378)
754 (356)
701(331)
932(440)
878(414)
806(380)
725(342)
889(419)
794(375)
1676(790) 1623(766) 1568(740) 1510(712) 1443(681)
751 793 833 870 903
536 522 508 493 468
2.42 2.37
2.32 2.27 2.21
1721(812) 1669(787) 1593(751) 1516(715)
1429(674)
891 922 948 973
997
608 591 670 550
529
2.82 2.76 2.69 2.62
2.55
1822(859) 1742(822)
1661(784)
1566(739) 1455(686)
966 988 1007
1025
1046
725 701 675
650 623
3.44 3.36 3.27
3.20 3.12
2037(961) 1984(936)
1936(913) 1859(877) 1780(840)
932 957 980 1001 1020
721 700 676 651 625
3.15 3.06 2.96 2.87 2.77
1998(943) 1931(911) 1855(875) 1757(829)
1654(780)
1010 1027 1043 1056 1071
729 706 677 651
623
3.24 3.14 3.04 2.94
2.83
2006(946) 1916(904) 1817(857)
1710(807) 1582(746)
1053 1065 1076
1086 1097
778 753 724
694 661
3.5 3.4 3.3
3.19
3.07
