2.6.10 With an Adjustable Frequency Drive
175HA206.11
Pump
Flow
Return
Supply
air
V.A.V
outlets
Duct
Mains
Pump
Return
Flow
Mains
Fan
Main
B.M.S
Local
D.D.C.
control
Sensors
Mains
Cooling section Heating section
Fan section
Pressure
control
0-10V
or
0/4-20mA
Control
temperature
0-10V
or
0/4-20mA
Control
temperature
0-10V
or
0/4-20mA
VLT
M
- +
VLT
M
M
PT
VLT
x3 x3
x3
Figure 2.10 Fan System Controlled by Adjustable Frequency Drives
D.D.C.
Direct Digital Control
E.M.S. Energy Management system
V.A.V. Variable Air Volume
Sensor P Pressure
Sensor T Temperature
Table 2.7 Abbreviations used in Figure 2.10
2.6.11 Application Examples
The next pages provide typical examples of applications within HVAC.
For further information about a given application, ask the Danfoss supplier for an information sheet that gives a full
description of the application. The following application notes can be downloaded from the Danfoss web page,
www.danfoss.com/BusinessAreas/DrivesSolutions/Documentations/Technical+Documentation.htm.
Variable Air Volume
Ask for The Drive to...Improving Variable Air Volume Ventilation Systems, MN60A.
Constant Air Volume
Ask for The Drive to...Improving Constant Air Volume Ventilation Systems, MN60B.
Cooling Tower Fan
Ask for The Drive to...Improving fan control on cooling towers, MN60C.
Condenser pumps
Ask for The Drive to...Improving condenser water pumping systems, MN60F.
Product Overview Design Guide
MG18C522 Danfoss A/S © Rev. 2014-01-14 All rights reserved. 17
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