Danfoss Maneurop VTZ Series Instructions Manual page 4

Instructions
Note: CD compressor Drive frequency converters are delivered with a factory preset "open loop control" for compressor speed magement.
12 13 16 17 18 19 20 27 29 32 33
Start
To switch from open loop to process loop cable
signal connections have to be done has shown
below.
The only parameters modifications are:
 Load / motor
 Parameter 1.00Configuration mode: Process
12 13 16 17 18
Start
Process Control via an AKS32
12 13 16 17 18
Start
Process Control via an AKS33

Example of control cables connection
Frequency converter Compressor Drive
37
Modifications to move from open loop control to process loop:
 Reference / Ramps
Parameter 3.01 bar
Parameter 3.02  -1 bar
Parameter 3.03  +12 bar
Parameter 3.10  suction pressure adjus-
tement required as a percentage of the sensor
pressure range (28% for 3.4 bar  -10°C R404A)
Frequency converter CD302 Compressor Drive
19 20 27 29 32 33 37
Frequency converter CD302 Compressor Drive
19 20 27 29 32 33 37
8510223 P01-A © Danfoss Commercial Compressors March 2006
Analog Analog
output input
39 42 45 50 53 54 55 60 61
Open Loop input 0-10V
between 13 55
Analogue Analogue
output input
39 42 45 50 53 54
Analog Analog
output input
39 42 45 50 53 54
®
68 69 4 5
Bus
Fig 10
Parameter 3.15Reference ressource 1no
function
Control: Analog signal 4-20 mA for -1 / 12 bar
is connectected on input 54
Control Input 54: switch it on I position
(switch located back to the local control panel)
TM
55 60 61 68 69 4 5
Bus
Fig 11
TM
55 60 61 68 69 4
Bus
Fig 12
Digital
output
1 2 3
to external
fault relay
Digital
output
1 2 3
to external
fault relay
Digital
output
5 1 2 3
to external
fault relay