Danfoss AK-SM 850 - AKC on (Evap Shutdown When Injection Off)

AKC ON (Evap shutdown when injection o)
One of the main features of the AKC On function is that the SM
will detect if there is a pack shutdown condition. The SM does
this by monitoring the pack controller for such conditions. If
congured to do so, and upon detecting a pack shut down, the
SM will issue a signal to all (congured) evap controllers under the
pack suction group to close their AKV valves. The eect of closing
the local AKV valve is to limit liquid ow in the evaporator. Due
to the AKV valve being closed during a pack shutdown period
there is a greatly reduced risk of liquid hammer or compressor
damage upon pack / compressor start up. The AKC ON function
must be congured for each pack suction group. By default, the
associated evap controllers are set to ‘yes’ under the selection
choice of Evap shutdown when injection o. If a evap controller is
not required to be part of the suction group AKC ON function, set
this value to ‘No’.
Pack Conguration
Under the settings / Summary screen set the question
Evap shutdown when injection o to ‘YES’
Evap Conguration
If the Evap is not required to be part of the AKC ON function, modify
the question
Evap shutdown when injection o to ‘No’
AK-SM 850 User Guide Lit. no. USCO.PI.R1.E1.02 © Danfoss 07-2013 43