Capacity Regulation Of Condenser; Regulation; Neutral Zone And Regulating Band; Condenser Definition - Danfoss AKC 25H1 Description

Capacity regulation of
condenser
AKC 25H1
The step regulator in the controller can control up to nine capacity steps that may be
distributed on one or more condensers. (The controller has nine relay outputs that may be
distributed between compressor steps and condenser steps).

Regulation

The cut in condenser capacity is controlled by the actual value of the condensing pressure,
and on whether the pressure is rising or falling.
- In the neutral zone there is no cut in/cut out of capacity steps.
- In the "+zone" and "-zone" bands cut in/cut out depends on whether the pressure is rising or
falling.
Cut in/cut out takes place with the selected time delays.
- In the "++zone" and "--zone" bands cut in/cut out takes place with the selected time delays.
The regulation is based on the set value and the pressure measured by pressure transmitter
Pc.
Condenser Capacity Ctrl.

Neutral zone and regulating band

The neutral zone is set.
The +zone and -zone bands are set.
The time delay for the +zone and -zone bands is set.
The time delay for the ++zone and --zone bands is set.
Condenser Capacity Ctrl.

Condenser definition

The controller can control several condenser steps.
The condenser steps must be defined in a sequence so that the controller will know which
output belongs to condenser step 1, which output to condenser step 2, etc. The individual
condenser steps can control the same capacity and they will be cut in and out in sequence.
The steps defined with the lowest number will be cut in first, then the step defined with a
higher number, etc. Cut out takes place in the opposite sequence. Thus, the last cut in step
will be cut out first.
Output Configuration
Function description RC.1J.Z4.02 © Danfoss 09/1999
Settings Condenser Ctrl.
Settings Condenser Ctrl.
DO Relay No. ( )
Pc SP ° C
___
___
NZ K
___
+Zone K
___
+Zone s
___
++Zone s
___
-Zone K
___
-Zone s
___
- -Zone s
DO( ) Type 2 (2=condenser)
DO( ) Dev. No
9