Danfoss AK-PC 351 - Compressor Mode Configuration

10 User Guide RS8GZ302 © Danfoss 2015-06 AK-PC 351
Compressor mode Set the type of compressor to be used for regulation:
None;
1 single, 2 single, 3 single, 4 single
1 speed, 2 speed, 3 speed, 4 speed,
1 digital, 2 digital, 3 digital
1 stream, 2 stream, 3 stream
1x1 unload, 1x2 unload, 1x3 unload, 2x1 unload
Application
Single step 1 single
2 single
3 single
4 single
Speed on the
rst. Then
single step
1 speed
2 speed
3 speed
4 speed
Digital scroll
(stream) on
the rst. Then
single step
1 digital
2 digital
3 digital
Compressors
with unloader
1x1 unload
1x2 unload
1x3 unload
2x1 unload
DO-demand /
AO-demand
Fac:
2 digital
Po sensor max range Pressure transmitter working range
Set pressure transmitters upper value. Set in relative pressure.
Min: -1 bar
Max: 159 bar
Fac: 12 bar
Po sensor min range Pressure transmitter working range
Set pressure transmitters lower value.. Set in relative pressure.
Min: -1 bar
Max: 159 bar
Fac: -1 bar
Lead comp. size Set the nominal compressor capacity for the rst compressor (it is dened under
“Compressor mode”)
That is, the capacity of either a “Digital scroll”, “Stream”, “Variable speed”
Min: 1 kW
Max: 100 kW
Fac: 1 kW
Comp. size Set the nominal compressor capacity of the other compressors
For single-step only: All are of the same size, including the rst.
For unloader all: All are of the same size, including the rst.
Min: 1 kW
Max: 100 kW
Fac: 1 kW
VSD Min. speed For speed
Min. speed for speed regulated compressor
Min: 10 Hz
Max: 60 Hz
Fac: 30 Hz
VSD Start speed For speed
Minimum speed at which the compressor will start (must be set to a higher value than
“VSD Min. speed”)
Min: 20 Hz
Max: 60 Hz
Fac: 45 Hz
VSD Max speed For speed
Highest permitted speed for compressor
Min: 40 Hz
Max: 120 Hz
Fac: 60 Hz
PWM period time For “Scroll” and “Stream”
Set the period time for the bypass valve (on time + o time)
Min: 10 s
Max: 40 s
Fac: 20 s
PWM Min cycle For scroll
Minimum capacity in the time period (without a minimum capacity the compressor
will not be cooled)
Min: 10%
Max: 50%
Fac: 10%
PWM start cycle For scroll
Start capacity: the compressor will only start when the capacity requirement reaches
the value
Min: 10%
Max: 60%
Fac: 30%