Keystone Krown, Инструкция по установке и обслуживанию

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ECMSC Airflow Setpoint
Step 1: Determine initial test point voltage (VDC) based on scheduled flow rate.
To calculate FPM from a CFM value use the equation for the respective unit style and size from the following table.
Size 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 VDC =
(CFM-45) ÷ 97
VDC =
(CFM-33) ÷ 67
VDC =
(CFM-76) ÷ 145
VDC =
(CFM-14) ÷ 127
VDC =
(CFM-88) ÷ 198
VDC =
(CFM-67) ÷ 157
Supply - Constant Torque – Forward Curve
Velocity 24x24 24x36 24x48
FPM BTR - FC RSR - FC BTR - FC RSR - FC BTR - FC RSR - FC
45-95 VDC =
(CFM+174) ÷ 309
VDC =
(CFM+168) ÷ 253
VDC =
(CFM+177) ÷ 322
VDC =
(CFM+142) ÷ 273
VDC =
(CFM+139) ÷ 336
VDC =
(CFM+311) ÷ 373
95-140 VDC =
(CFM+19) ÷ 207
VDC =
(CFM+47) ÷ 174
VDC =
(CFM-70) ÷ 197
VDC =
(CFM-79) ÷ 167
VDC =
(CFM-138) ÷ 212
VDC =
(CFM-81) ÷ 190
Supply - Constant Torque – Backward Curve
Velocity 24x36 24x48
FPM BTR - BC RSR - BC BTR - BC RSR - BC
45-140 VDC = (CFM+240) ÷ 450 VDC = (CFM+332) ÷ 415 VDC = (CFM+185) ÷ 459 VDC = (CFM+403) ÷ 514
Reverse Flow - Constant Flow – Forward Curve
Velocity 24x24 24x48
FPM RSR - FC RSR - FC
45-140 VDC = (CFM-24) ÷ 68 VDC = (CFM-61) ÷ 158
Reverse/Exhaust Flow - Constant Torque – Forward Curve
Velocity 24x24 24x48
FPM RSR - FC RSR - FC
45-95 VDC = (CFM+90) ÷ 197 VDC = (CFM+141) ÷ 308
95-140 VDC = (CFM+90) ÷ 197 VDC = (CFM-90) ÷ 196
Supply, 24 x 48 in., RSR, FC Wheel, Constant Torque @ 450cfm
FPM = CFM/5.33 = 450/5.33
FPM = 84
VDC = (CFM+311)/373 = (450+311)/373
VDC = 2.04V
NOTE: The calculated VDC value is intended as a starting point; actual VDC value may differ slightly depending on field
variables.
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