AK-PC
520
Instructions RI8NM252 © Danfoss 12/2009
3
Capacity step
All
capacity steps are presumed to be identical.
Coupling mode
Coupling mode 1 =
sequential
operation.
Coupling mode 2 =
cyclic
operation.
Couplings
When there is cyclic operation and connections with unloaders there
will in some capacity cutins and cutouts be overlappings where the
unloaders from either one compressor or another may be active.
In such cases the unloaders on the compressor with the lowest number
of hours will be cut in, and the others cut out.
The changeover will take place at 6-second intervals.
Compressor configuration when o61 =1 or 2
(This is where you can choose between the options shown.)
Setting "c16" will define the configuration.
Setting "c08" will define coupling mode.
Compressor connections
Coupling
mode
Relay no.
Set
"c08"
to
Set
"c16"
to
If the entire condenser capacity is to be controlled by
a frequency converter, AK-PC 520 must send an analog
signal about the required capacity (“c29” = 9).
The signal varies from 0 to 10 V. Signal and capacity
have the following context.
Condenser couplings
When the compressor relays have been established the turn
comes to the fan relays.
The first vacant relay (DO1-DO5) will become the first fan relay. It
will be followed by the subsequent relays.
Danf
os
s
84B2870.10