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Global IFS
Fan Powered Box
FAN POWERED BOX & TERMINAL UNIT
START UP & OPERATION
Electronically Commutated Motor (ECM) Information
Do not switch 120/208/240/277 VAC power to turn ECM motor on and off. Instead control the 24VAC signal or BAS
signal to turn the ECM motor on and off. The ECM motor has large capacitors that charge quickly on mains power up.
Switching on several motors frequently could reduce building power quality and is not recommended.
Standard ECM Speed Controller
The Global IFS standard speed controller allows manual adjustment of the fan flow using the adjustment dial on the
control board and a voltmeter. Remote control of the fan speed is also possible with the BAS input. The following chart
describes the controller response to a 0-10 VDC input
.
Input Voltage
Mode of Operation
0-1 VDC
Manual Control
1-2 VDC
Fan Off (1.5V Recommended)
2-10 VDC
Remote Control 0 - 100%
Note: Refer to “Fan Curves” performance data documents for fan
curves.
Pressure Independent Flow (PIF) Motor Program Voltage
Equations
Box Con iguration:
Size
115V
208/240V
277V
10
CFM = (175.57 X VDC) - 159.00
CFM = (173.93 X VDC) - 153.79
CFM = (171.07 X VDC) - 145.50
20
CFM = (272.79 X VDC) - 228.79
CFM = (272.57 X VDC) - 224.57
CFM = (271.36 X VDC) - 220.21
30
CFM = (347.14 X VDC) - 305.86
CFM = (347.21 X VDC) - 306.21
CFM = (346.29 X VDC) - 300.14
40
CFM = (521.93 X VDC) - 447.93
CFM = (522.86 X VDC) - 445.71
CFM = (526.5 X VDC) - 471.07
50
CFM = (640.00 X VDC) - 378.86
CFM = (636.79 X VDC) - 373.50
CFM = (615.07 X VDC) - 331.93
60
CFM = (1018.14 X VDC) - 885.71
CFM = (1029.07 X VDC) - 893.50
CFM = (1015.93 X VDC) - 897.93
Terminal Configuration:
Size
115V
208/240V
277V
10
CFM = (155.50 X VDC) - 50.79
CFM = (152.86 X VDC) - 45.29
CFM = (178.57 X VDC) - 167.29
20
CFM = (249.79 X VDC) - 207.64
CFM = (253.36 X VDC) - 211.50
CFM = (246.36 X VDC) - 197.64
30
CFM = (298.00 X VDC) - 216.86
CFM = (297.29 X VDC) - 214.43
CFM = (314.79 X VDC) - 277.79
40
CFM = (478.36 X VDC) - 347.50
CFM = (474.71 X VDC) - 341.00
CFM = (475.86 X VDC) - 350.00