Keystone Krown, Инструкция по установке и обслуживанию

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BFC Airflow Setpoint
Step 1: Determine if BFC will be controlled using local control, BAS analog voltage signal, or BACnet. The control mode can
be confirmed by observing the cycling status readout on the LCD.
NOTE: The control hierarchy is BACnet > BAS > Local. The control mode is based on the highest level of control provided.
Step 2: For Local or BACnet control, determine the setpoint from the appropriate airflow formula for your model in the tables
below.
If BFC is being controlled by BAS analog voltage signal, refer to "ECMSC Airflow Setpoint" section for proper input voltage
(Note this will be 2X the VDC value shown in the tables).
Set-point (ECM%) ranges from 0% - 100%
To calculate FPM from a CFM value use the equation for the respective unit style and size from the following table.
RSR BTR
2x2 CFM/2.30 CFM/3.31
2x3 CFM/3.82 CFM/5.13
2x4 CFM/5.33 CFM/6.95
Supply - Constant Flow - Forward Curve
Velocity 24x24 24x36 24x48
FPM BTR - FC RSR - FC BTR - FC RSR - FC BTR - FC RSR - FC
45-140
ECM% =
(CFM ÷ 3.40) - 42
ECM% =
(CFM ÷ 2.35) - 43
ECM% =
(CFM ÷ 5.08) - 44
ECM% =
(CFM ÷ 4.45) - 32
ECM% =
(CFM ÷ 6.93) - 42
ECM% =
(CFM ÷ 5.50) - 41
Supply - Constant Torque - Forward Curve
Velocity 24x24 24x36 24x48
FPM BTR - FC RSR - FC BTR - FC RSR - FC BTR - FC RSR - FC
45-95 ECM% =
(CFM ÷ 10.82) - 12
ECM% =
(CFM ÷ 8.86) - 10
ECM% =
(CFM ÷ 11.27) - 13
ECM% =
(CFM ÷ 9.56) - 14
ECM% =
(CFM ÷ 11.76) - 17
ECM% =
(CFM ÷ 13.06) - 5
95-140 ECM% =
(CFM ÷ 7.25) - 26
ECM% =
(CFM ÷ 6.09) - 21
ECM% =
(CFM ÷ 6.90) - 39
ECM% =
(CFM ÷ 5.85) - 42
ECM% =
(CFM ÷ 7.42) - 47
ECM% =
(CFM ÷ 6.65) - 41
Supply - Constant Torque - Backward Curve
Velocity 24x36 24x48
FPM BTR - BC RSR - BC BTR - BC RSR - BC
45-140 ECM% = (CFM ÷ 15.75) - 13 ECM% = (CFM ÷ 14.53) - 6 ECM% = (CFM ÷ 16.07) - 17 ECM% = (CFM ÷ 17.99) - 6
Reverse/Exhaust Flow - Constant Flow - Forward Curve
Velocity 24x24 24x48
FPM RSR - FC RSR - FC
45-140 ECM% = (CFM ÷ 2.38) - 39 ECM% = (CFM ÷ 5.53) - 40
Reverse/Exhaust Flow - Constant Torque - Forward Curve
Velocity 24x24 24x48
FPM RSR - FC RSR - FC
45-95 ECM% = (CFM
÷
6.90) - 16 ECM% = (CFM
÷
10.78) - 15
95-140 ECM% = (CFM
÷
6.90) - 16 ECM% = (CFM
÷
6.86) - 42
Supply, 24 x 48 in., RSR, FC Wheel, Constant Torque @ 550cfm
FPM = CFM/5.33 = 550/5.33
FPM = 103
ECM% = (CFM/6.65)-41 = (550/6.65)-41
ECM% = 42%
NOTE: The calculated ECM% value is intended as a starting point; actual ECM% value may differ slightly depending on field
variables.
For more information visit KeystoneCleanAir.com v001
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