Danfoss VLT HVAC Drive FC 102 Design Manual page 32

Product Features
5.3.3 Using a Drive to Save Money
The drive eliminates the need for some equipment that would normally be used. The 2 systems shown in Illustration 5.14
and Illustration 5.15 can be established at roughly the same price.
Cost without a drive
Cooling section
-
5 5
Return
3-Port
valve
Bypass
M
x6
Starter
P.F.C
Mains
DDC
VAV
Sensor P
EMS
Sensor T
Illustration 5.14 Traditional Fan System
30
Heating section
+
Return
Flow Flow
Control
3-Port
valve
Valve
posi-
tion
Bypass
Pump Pump
M
x6
Starter
Fuses Fuses
LV
supply
P.F.C
Mains
Direct digital control
Variable air volume
Pressure
Energy management system
Temperature
Danfoss A/S © 11/2017 All rights reserved.
®
VLT HVAC Drive FC 102
Inlet guide vane Fan section
Control
Mechanical
Valve
linkage
posi-
and vanes
tion
IGV
Motor
or
actuator
Control
LV
supply
Supply
air
Fan
M
Sensors
PT
x6
Local
D.D.C.
control
Starter
Pressure
control
Power
signal
Factor
0/10V
Correction
Mains
V.A.V
outlets
Duct
Main
B.M.S
Temperature
control
signal
0/10V
MG16C302