DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2
Produced by Danfoss Electronics spa Graphic Department, 10-2009
28
Danfoss Electronics spa
Air Handling seq.
- user manual
5|
Dampers and Energy recovery control
Fig 15 _ [Dampers and Energy recovery control - Dampers and Energy recovery control ]
Dampers and Energy recovery unit are both controlled with the same control sequence, called “Damper Sequence”
(see “6.1] Damper control sequences”)
.
5.1| External and Mixing dampers
The external damper load demand (Pext) is calculated by the damper sequence
(see “6.1] Damper control
sequences”)
.
The mixing damper load demand (Pmix) is calculated as antagonistic to the external damper. Pmix=100-Pext.
External and mixing dampers can be ON/OFF or modulating. If they are not mechanically linked, a separated output
for each damper is available.
Depending on the type of damper to be operated, the following outputs are used.
EXTERNAL AND MIXING DAMPERS
Type of damper
Type of output
Output used
ON/OFF
digital output
RDD
Mixing Damper
EDD
External Damper
0/10V
analog output
RDA
Mixing Damper
EDA
External Damper
Tab 23_ [Dampers and Energy recovery control - External and Mixing dampers]
