Air Flow Data - Friedrich VERT-I-PAK VHA09K Installation & Operation Manual

Air Flow Data

Indoor CFM & External Static Pressure
MODEL
Fan Speed
ESP (")
0.0"
0.05"
0.10"
0.15"
0.20"
0.25"
0.30"
0.35"
0.40"
*Maximum Allowable Static. Units rated at 0.3" ESP.
Indoor airflow may be determined by measuring the external static pressure (ESP) of the duct system using an inclined
manometer or magnahelic gauge and consulting the above chart to derive actual air flow. Under no circumstances should
the Vert-I-Pak be operated at an higher external static pressure than indicated above. Operation of the Vert-I-Pak over the
recommended ESP will result in inadequate airflow, leading to poor performance and/or premature component failure.
Blower Control
All Vert-I-Paks, by default, will be configured to low speed blower operation. The speed setting can be changed to high speed by updating
the speed tap settings on the fan control relay. The blower fan speed setting cannot be changed at the thermostat. Regardless of wiring
GH and/or GL, the unit will continue to operate at the speed setting at the fan control relay.
Note: Any non-Friedrich thermostat or low voltage device being powered by the Vert-I-Pak will need to be reviewed and approved for use.
VHA09
Low High Low
360
420 360
340
400 340
325
385 325
310 370 310
295 355 295
270 325 270
* *
260 300 260
*
-- -- --
-- -- --
VHA12 VHA18
High Low
SCFM
460 620
450 580
430 550
415 510
400 480
380 450
350 400
* *
-- 365
-- 320
VHA24
High Low High
705 675 765
675 635 735
640 600 700
610 560 670
585 525 635
565 490 615
550 440 600
*
500 400 540
450 350 490
* *
9