Danfoss AK-CH 650 User Manual

AK-CH 650 Capacity controller RS8ER302 © Danfoss 2016-02 95
Capacity distribution
Step regulation
Cutins and cutouts are carried out sequentially. The last cut-in unit
will be cut out rst.
Speed regulation
When an analog output is used the fans can be speed regulated,
e.g. with a frequency converter type AKD.
Joint speed regulation
The analog output voltage is connected to the speed regulation.
All fans will now be regulated from 0 to max. capacity. If an ON/
OFF signal is required for the frequency converter, so that the fans
can be stopped completely, a relay output can be dened.
The controller starts the frequency converter when the capacity
requirement corresponds to the set starting speed. The controller
stops the frequency converter when the capacity requirement
becomes lower than the set minimum speed.
Start
Min.
Speed regulation + step regulation
The controller starts the frequency converter and the rst fan
when the capacity requirement corresponds to the set starting
speed.
The controller cuts in several fans step by step as the capacity
requirement grows and then adapts the speed to the new
situation.
The controller cuts out fans when the capacity requirement
becomes lower than the set minimum speed.
In the conguration of the controller’s outputs it will be the output “FanA1”” that will start and stop
the frequency converter.
Speed regulation of rst fan + step regulation of the rest
The controller starts the frequency converter and increases the
speed of the rst fan.
If additional capacity is required, the next fan cuts in at the same
time as the rst fan switches to minimum speed. From here, the
rst fan can increase speed again, etc.
Start
Min.

Danfoss AK-CH 650 Specifications

General

Brand	Danfoss
Model	AK-CH 650
Category	Controller
Language	English