International comfort products PH4E Series, Installation Instructions Manual, Page: 15 / 24

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Indoor Airflow and Airflow Adjustments
UNIT OPERATION HAZARD
Failure to follow this caution may result in unit
damage.
For heating and cooling operation, the recommended
airflow is 350 to 450 cfm for each 12,000 Btuh (165
L/s to 212 for each 3.5 kW) of rated cooling capacity.
For units with optional electric heat, the airflow must
not be reduced below the levels stated in Table 1.
CAUTION
!
NOTE : Be sure that all supply − and return − air grilles are open,
free from obstructions, and adjusted properly.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power to the unit and install
lockout tag before changing blower speed.
!
WARNING
Table 3 – Color Coding for Indoor Fan Motor Leads
Black = High Speed
Blue = Med Speed (if available)
Red = Low Speed
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power to the unit and install
lockout tag before changing blower speed.
!
WARNING
To change the speed of the indoor fan motor, remove the fan
lead from the splice connection. Replace with the desired fan
speed lead. Insulate the unused lead to prevent shorting.
Table 4 – Wet Coil Air Delivery
ENGLISH
400 VOLT
UNIT
MOTOR
SPEED
EXTERNAL STATIC PRESSURE (in. W.C)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
PH4E24
Low
Watts 303 305 306 300 − − − − − − −
Cfm 969 879 785 687 − − − − − − −
High
Watts − − − − 435 428 428 422 − − −
Cfm − − − − 963 833 758 676 − − −
PH4E30
Low
Watts − 1002 954 921 889 853 814 − − − −
Cfm − 1189 1115 1041 971 903 833 − − − −
High
Watts − − − − − − − 700 683 688 755
Cfm − − − − − − − 1223 1142 1075 1058
PH4E36
Low
Watts 552 540 529 523 514 480 − − − − −
Cfm 1296 1237 1167 1097 1029 952 − − − − −
High
Watts − − − − − 782 765 736 721 780 1002
Cfm − − − − − 1467 1398 1321 1237 1165 1137
PH4E48
Low
Watts 692 686 678 664 652 664 736 − − − −
Cfm 1571 1509 1444 1370 1295 1240 1237 − − − −
High
Watts − − 1112 930 856 834 825 811 793 − −
Cfm − − 1693 1670 1601 1521 1447 1378 1294 − −
SI
400 VOLT
UNIT
MOTOR
SPEED
EXTERNAL STATIC PRESSURE (Pa)
0 25 50 75 100 125 150 175 200 225 250
PH4E24
Low
Watts 303 305 303 300 − − − − − − −
L/s 458 415 371 324 − − − − − − −
High
Watts − − − − 435 428 428 422 − − −
L/s − − − − 455 393 358 319 − − −
PH4E30
Low
Watts − 1002 954 921 889 853 814 − − − −
L/s − 561 526 491 458 426 393 − − − −
High
Watts − − − − − − − 700 683 688 755
L/s − − − − − − − 577 539 508 499
PH4E36
Low
Watts 552 540 529 523 514 480 − − − − −
L/s 612 584 551 518 486 449 − − − − −
High
Watts − − − − − 782 765 736 721 780 1002
L/s − − − − − 693 660 624 584 550 536
PH4E48
Low
Watts 692 686 678 664 652 664 736 − − − −
L/s 741 712 681 647 611 585 584 − − − −
High
Watts − − 1112 930 856 834 825 811 793 − −
L/s − − 799 788 756 718 683 650 611 − −
*Air delivery values are based on operating voltage of 400 − v, wet coil, without filter or electric heater.
NOTES: 1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh (165 L/s for each 3.5 kW) of rated cooling capacity.
Evaporator coil frosting may occur at airflow below this point.
2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.