Danfoss VLT FC 102 Series Design Manual page 28

Introduction to VLT® HVAC D...
2.7.9 Using an Adjustable Frequency Drive Saves Money
2 2
The example on the following page shows that a lot of extra equipment is not required when an adjustable frequency drive
is used. It is possible to calculate the cost of installing the two different systems. In the example on the following page, the
two systems can be established at roughly the same price.
2.7.10 Without an Adjustable Frequency Drive
D.D.C.
V.A.V.
Sensor P
Table 2.9 Abbreviations used in Figure 2.15 and Figure 2.16
Figure 2.15 Traditional Fan System
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Design Guide
= Direct Digital Control
= Variable Air Volume
= Pressure
Danfoss A/S © Rev. 06/2014 All rights reserved.
E.M.S. = Energy Management system
Sensor T = Temperature
MG11BC22