Fan Performance For Constant Torque Ec Motor (Sizes 009-012) - Daikin VHF Installation And Maintenance Manual

Fan Speed Selector Switch
A 4-position fan speed selector switch located in the control
box allows CFM settings to be field adjustable. Fan speed
control optimizes unit fan speed based on thermostat/room
sensor inputs. The fan speed switch allows for manually setting
an optimal fan speed specific to the application requirements.
Refer to Table 4

Fan Performance for Constant Torque EC Motor (Sizes 009-012)

Table 20: Constant torque EC motor CFM values
Unit Size Setting Function
4 (High)
3 (Standard)
Stage 1
2 (Medium)
1 (Low)
4 (High)
3 (Standard)
Stage 2
2 (Medium)
1 (Low)
009
4 (High)
3 (Standard)
Fan Only
2 (Medium)
1 (Low)
4 (High)
3 (Standard)
Hydronic
Heat
2 (Medium)
1 (Low)
4 (High)
3 (Standard)
Stage 1
2 (Medium)
1 (Low)
4 (High)
3 (Standard)
Stage 2
2 (Medium)
1 (Low)
012
4 (High)
3 (Standard)
Fan Only
2 (Medium)
1 (Low)
4 (High)
3 (Standard)
Hydronic
Heat
2 (Medium)
1 (Low)
Note: 1. EC motor is programmed to make soft starts and stops to reduce stress transmitted to the fan housing. They adjust their speed and torque to deliver constant
airflow over a wide range of external static pressure.
2. Units are shipped at setting 3 (standard). Speed adjustment is done by 4-position switch in the control box.
3. The unit is capable of high-low fan performance through the use of a 2-stage thermostat wired to specific terminals for
High-Low CFM fan performance. Standard operation with a 1-stage thermostat is indicated as stage 2 fan performance.
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External Static Pressure (in-H
0 .00 0 .05 0 .10
430 410 390
420 400 380
350 330 310
350 330 310
450 430 410
430 410 390
420 400 380
350 330 310
350 330 310
350 330 310
370 340 310
370 340 310
430 410 390
420 400 380
350 330 310
370 340 310
450 430 410
420 400 380
400 370 350
400 370 350
470 450 430
450 430 410
420 400 380
400 370 350
400 370 350
400 370 350
360 330 300
360 330 300
450 430 410
420 400 380
400 370 350
360 330 300
Figure 55: 4-position fan speed selector switch
O) [Dry Coil and STD Filter) (inches of water column)
2
0 .15 0 .20 0 .25
370 350 340
360 340 320
290 270 250
290 270 250
400 380 360
370 350 340
360 340 320
290 270 250
290 270 250
290 270 250
280 250 220
280 250 220
370 350 340
360 340 320
290 270 250
280 250 220
390 370 340
360 340 310
330 310 290
330 310 290
410 390 370
390 370 340
360 340 310
330 310 290
330 310 290
330 310 290
270 240 210
270 240 210
390 370 340
360 340 310
330 310 290
270 240 210
45
P
erforManCe
0 .30 0 .35 0 .40
320 300 280
300 270 250
230 210 190
230 210 190
340 320 300
320 300 280
300 270 250
230 210 190
230 210 190
230 210 190
190 160 130
190 160 130
320 300 280
300 270 250
230 210 190
190 160 130
320 300 280
290 270 250
260 240 220
260 240 220
350 330 310
320 300 280
290 270 250
260 240 220
260 240 220
260 240 220
180 150 120
180 150 120
320 300 280
290 270 250
260 240 220
180 150 120
Vertical Stack WSHP • IM 986-11